The MPP marketplace.

A live-verified index of sellers on the MPP payment protocol - 178 confirmed by a real, unpaid probe of their actual endpoint, not just claimed by a registry.

Register in one call
Free, no account - we probe your origin for a genuine MPP challenge and list you if it answers. A seller not yet in the mpp.dev registry needs its paywall reachable at the bare origin root to verify today.
VERIFIED SELLERS
178
live-probed, not just registry-listed
ENDPOINTS LISTED
363
advertised across verified sellers
CATEGORIES
9
DISCOVERED TOTAL
356
candidates found, verification pending or failed

MPP leaderboard · settled on Temporead on chain 24m ago

Verified sellers ranked by inbound USDC.e transfers on Tempo (chain 4217) to the recipient address their live MPP challenge names, read from the chain by us over the last ~15.4h (99,000 blocks). A window, not lifetime; an inbound transfer is the same proxy the router requires before it spends (floor 20 in the window = routable). Rolling 7d/30d columns sum what we observed since 2026-08-30 (1 UTC day) - a running total from that date, not lifetime. Ranked by 7d, then window. Machine-readable: /api/mpp-leaderboard.

#Seller · Tempo recipientlast ~15.4h7d30dPayersVolume 7dRouter
1 fal.ai, Modal, Firecrawl, Tempo RPC +12 more on this recipient 2,897 4,276 4,276 385 $8.94 routable
2 mppgas, Stablecoin Peg Monitor, Identity Resolver, QR Code Service +3 more on this recipient 0 268 268 0 $3.71 below floor (20)
3 StableEnrich, StableFeedback 92 99 99 9 $1.65 routable
4 Agent402.Tools - 500+ pay-per-call tools for AI agents over x402 + MPP 51 88 88 1 $0.11 routable
5 Surf, glim.sh, Surf Twitter 33 82 82 5 $0.64 routable
6 Word of the Day 46 54 54 42 $0.54 routable
7 StableSocial 9 13 13 2 $0.78 below floor (20)
8 Tempo Wallet Snapshot 9 11 11 9 $0.11 below floor (20)
9 Tempo Activity Score 9 11 11 9 $0.11 below floor (20)
10 DeepTrawler 10 10 10 1 $0.01 below floor (20)
11 StablePhone 2 9 9 1 $4.86 below floor (20)
12 Exa 3 5 5 1 $0.02 below floor (20)
13 Amazon Intelligence, Merchant Trust Check 4 4 4 1 $0.60 below floor (20)
14 Agent Commerce Factory 0 4 4 0 $0.15 below floor (20)
15 StableStudio 1 3 3 1 $0.21 below floor (20)
16 Random Stable Fact 0 3 3 0 $0.01 below floor (20)
17 oculr 2 2 2 1 $5.00 below floor (20)
18 Agent Launch Readiness API 2 2 2 1 $0.02 below floor (20)
19 a9n9 Deep Research Agent 1 1 1 1 $0.33 below floor (20)
20 Xquik API 1 1 1 1 $0.00 below floor (20)
21 tempo-latest-block 0 1 1 0 $0.01 below floor (20)
HOST · NOT RANKEDAgent402 (this site) 1 settlements · 1 buyers (30 days, outside buyers only) · 1 all time Our own canary and volume runs are excluded from these figures; the ranked rows measure other sellers on chain and never include the host.

99 more verified recipients with no inbound transfer observed (listed below, not ranked).

Verified MPP sellers

Every row here made a real, unpaid request that came back with a genuine WWW-Authenticate: Payment challenge - a registry listing alone is never enough to appear here.

tempo-token-info
tempo-mpp-swart.vercel.app
verified · probed 24m ago
funding-rates.api.klymax402.com
funding-rates.api.klymax402.com
verified · probed 24m ago
library.forgemesh.io
library.forgemesh.io
verified · probed 24m ago
agents.daedalusdevelopmentgroup.com
agents.daedalusdevelopmentgroup.com
verified · probed 24m ago
Merchant Trust Check
trust.lightanchor.ai

Buy-safety verdict for any shop or product URL before an agent (or its human) pays. By Light Anchor.

verified · probed 24m ago
coil.trade
coil.trade
verified · probed 24m ago
stablepeopledata.dev
stablepeopledata.dev
verified · probed 24m ago
x402email.com
x402email.com
verified · probed 24m ago
Relay
relay.payweave.services

Durable webhook inboxes for agents — receive callbacks and approvals without holding a connection open, with long-poll wait.

verified · probed 24m ago
Activity Score
tempo-mpp-liart.vercel.app

Wallet intelligence for Tempo blockchain. Single score, batch scoring, full deep analysis (score + portfolio + whale status), and session payments.

verified · probed 24m ago
MPP API Proxy
mpp-proxy-ivan.vercel.app

Paid HTTP proxy to public APIs (api.coingecko.com, api.binance.com, api.kraken.com). POST with { url, method?, body?, headers? }.

verified · probed 24m ago
DeltaSignal ATLAS
api.aitrailblazer.net

ATLAS-7 Financial Intelligence for crypto public companies. Covenant stress, peer ranking, alpha opportunities, SEC XBRL fundamentals, compact daily monitoring, and paginated daily evidence drilldowns. Primary access is Tempo MPP on /mpp/v1/*; Agentic Market compatibility is Base x402 on /v1/*. Pay-per-call ($0.03-$0.10 for standard reads; bulk export pricing documented separately). Install skill: npx agentcash add https://api.aitrailblazer.net/skills/atlas/SKILL.md

verified · probed 24m ago
agentbodega.store
agentbodega.store
verified · probed 24m ago
Remlo Payroll API
www.remlo.xyz

Enterprise payroll infrastructure as MPP-native API endpoints. AI agents trigger compliant batch payments, compliance screening, yield queries, and salary streaming via HTTP 402.

verified · probed 24m ago
MPP API Proxy
mpp-proxy-sergey.vercel.app

Paid HTTP proxy to public APIs (api.coingecko.com, api.binance.com, api.kraken.com). POST with { url, method?, body?, headers? }.

verified · probed 24m ago
Agentic Restaurant API
agentic-reservations.vercel.app

Agent-first API for searching and booking restaurant reservations via Resy. Supports MPP (Tempo) and x402 (Base) wallet auth, plus API key auth. Booking costs $0.10 USDC.

verified · probed 24m ago
ScaleDown for Agents: compress, summarize, extract, classify
agents.scaledown.ai

Small language models that each do one job: compress long context, summarize, pull structured data out of text, and sort text into categories you define. A fraction of a general-purpose model's cost, and faster. Prepaid credits bought over a payment rail; no account, no API key.

verified · probed 24m ago
Tempo Activity Score
tempo-activity-score.vercel.app
verified · probed 24m ago
Exchange Rates
abstract-exchange-rates.payweave.services

Exchange Rates on PayWeave — 3 discoverable paid endpoints.

verified · probed 24m ago
ClawInspector Agent API
api.clawinspector.xyz

ClawInspector analyzes OpenClaw skills, GitHub repositories, prompts, and pasted artifacts for malicious instructions, unsafe commands, secret-exfiltration patterns, and reputation risk.

verified · probed 24m ago
Browserbase
browserbase.payweave.services

Headless Chromium browser sessions for agentic web automation — stealth scraping, full-page screenshots, and anti-bot/captcha bypass.

verified · probed 24m ago
StablePrint
stableprint.dev

Pass-through Prodigi print-on-demand catalog, preview, quote, and order API.

verified · probed 24m ago
Agent Wallet Risk API
tempo-wallet-intel-api.vercel.app

Agent-wallet risk and spend intelligence for MPP/Tempo workflows.

verified · probed 24m ago
BTC Current Signal
cryptoengine.club

Pay once to fetch the latest machine-consumable BTC directional signal.

verified · probed 24m ago
Weather Window
weather-window-silk.vercel.app

Go/no-go weather windows for outdoor operations. Give a location and an activity (drone flight, agricultural spraying, outdoor work) and get the good time windows in the next 48 hours, with the conditions and limiting factors for each. Decision support, not raw weather numbers. Built on Open-Meteo. Pay-per-call via MPP on Tempo. No API key, no signup.

verified · probed 24m ago
Agent Image Compression API
agent-image-compress-production.up.railway.app

Pay-per-image compression for AI agents. Send an image URL (or upload a file); get back a smaller PNG / JPEG / WebP / AVIF and the bytes saved.

verified · probed 24m ago
Rug Check
rug-check-iota.vercel.app

On-chain token safety check for EVM meme coins. Give a token contract and chain (Ethereum, BNB Chain, Base) and get a GO / CAUTION / DANGER verdict with reasons, read directly from on-chain state: ERC-20 validity, ownership renounced, upgradeable proxy, mint capability, and LP burn status. Built for agents that trade or evaluate new tokens. Pay-per-call via MPP on Tempo. No API key, no signup.

verified · probed 24m ago
booAPI-Tempo
booapi-tempo.vercel.app

Crypto and web3 ground-truth data for AI agents, read directly from on-chain sources and public market APIs. Token prices, DeFi TVL, yields, stablecoins, gas, ENS, supply, wallet risk, OFAC sanctions, market sentiment, and multi-exchange derivatives funding. Pay-per-call via MPP on Tempo. No API key, no signup.

verified · probed 24m ago
Solana Rug Check
sol-rugcheck.vercel.app

On-chain token safety check for Solana SPL tokens. Give a mint address and get a GO / CAUTION / DANGER verdict with reasons, read directly from Solana RPC: mint authority, freeze authority, supply, token program, and top-holder concentration. Freeze and mint authority being revoked are the key green flags Solana traders look for. Built for agents that trade or evaluate new tokens. Pay-per-call via MPP on Tempo. No API key, no signup.

verified · probed 24m ago
Reletter API
api.reletter.com

Newsletter data API. Search 7M+ email newsletters, fetch metadata, contacts, social accounts and rankings, and full-text search newsletter issues. Agents can buy access programmatically over HTTP 402 / MPP without signing up.

verified · probed 24m ago
Leya Legal Research API
api.leya.lawyer

Search and cite primary legal sources from Latin America — statutes, decrees, congressional initiatives, court rulings and official gazettes. Built for LLM agents: every result carries a stable `document_id`, a source attribution, and corpus-freshness metadata, so answers can be cited rather than recalled. Authenticate with `Authorization: Bearer leya_live_...`. Get a key at https://leya.lawyer/api-keys. Machine-readable errors and rate-limit headers are documented at https://leya.lawyer/docs/api. Calls are prepaid in credits; a new account gets 1,000 free. Search costs 3, a document read 1

verified · probed 24m ago
Convrgent API — KYH (Know Your Human) + BLAH (Be Like A Human) + KYB (Know Your Buyer)
convrgent.ai

Personality intelligence (KYH), communication intelligence (BLAH), and buyer intelligence (KYB) for AI agents. KYH analyzes humans via 11 frameworks — Western astrology, Human Design, Chinese astrology, Vedic astrology, numerology, communication style, 12 psych dimensions, socionics, 16 Personality Types, Enneagram, and cross-system convergence. BLAH tells agents how to talk to humans — adaptation, response coaching, and de-escalation. KYB turns personality data into sales intelligence — buyer profiling, pitch generation, objection prediction, price psychology, content strategy, cultural adapt

verified · probed 24m ago
Tempo Token Info
tempo-token-info.vercel.app
verified · probed 24m ago
Tempo Price Feed
tempo-mpp-self.vercel.app
verified · probed 24m ago
Storage
storage.payweave.services

Storage on PayWeave — 2 discoverable paid endpoints.

verified · probed 24m ago
DIBNY — Agent Collaborative Art Game
dibny.xyz

Agents pay to draw random lines on an 8×8 dot grid. Game ends unpredictably via probability ramp. Hidden style rarity revealed on completion. Dual payment: MPP (Tempo/pathUSD) via MCP and x402 (Base/USDC) via REST.

verified · probed 24m ago
Fuse AI — Fuse Network Business Payments & Loyalty API
ai.fuse.io

Pay-per-request access to Fuse Network blockchain data and business payment infrastructure. Accepts USDC (Base via x402; Tempo via MPP), Visa/Mastercard/wallets (Stripe via MPP), and Bitcoin Lightning (MPP).

verified · probed 24m ago
Clash of Coins API
mpp.clashofcoins.com

Agentic checkout for Clash of Coins

verified · probed 24m ago
Ishtar — agent-mediated dating venue
api.ishtar.numetal.xyz

Ishtar is an adults-only (18+), text-only, agent-mediated dating venue. Agents court and match on their humans' behalf; humans meet only after both agents agree and both humans verify and consent.

verified · probed 24m ago
Influship API
api.influship.com

Public API for creator search, profile lookup, and campaign-fit analysis. ## Authentication Send your API key in the `X-API-Key` header on every authenticated request. ```bash curl -H "X-API-Key: your_api_key" https://api.influship.com/v1/creators/autocomplete?q=fitness ``` ## Billing and Rate Limits The API uses credit-based billing and credit-based rate limits. - every endpoint has a credit cost - successful responses include `X-Credits-Charged` and `X-Credits-Features` - rate limits are enforced with per-minute and per-hour credit budgets - rate limit state is returned in the `RateLim

verified · probed 24m ago
Random Stable Fact
random-stable-fact-snowy.vercel.app
verified · probed 24m ago
AgentOTP API
api.email.igtech.co

Pay-per-call transactional email one-time passwords for AI agents and applications.

verified · probed 24m ago
LightningRod API
api.lightningrod.ai

Predict anything with AI

verified · probed 24m ago
website-tech-analyzer
www.domainanalysers.online
verified · probed 24m ago
PulseNetwork (MPP)
mpp.theaslangroupllc.com

MPP gateway to PulseNetwork — 66 vertical intelligence APIs / 826 pay-per-call endpoints: sanctions & compliance screening, token safety, SEC fundamentals, tax (195 countries), legal, climate, health, energy, sports and more. Deterministic primitives from $0.01. Same data as the canonical x402 origins at *.theaslangroupllc.com.

verified · probed 24m ago
StableKey
stablekey.dev

VFX-grade green-screen unmixing via Corridor Digital's CorridorKey neural keyer. Submit a green-screen plate from StableUpload, get back alpha + straight foreground + premultiplied RGBA mp4s ready for compositing. Operated at cost-plus-defensive-buffer; surplus reinvested. Model © Corridor Digital — corridordigital.com.

verified · probed 24m ago
x402audit
x402audit.dev

Free compliance + visibility audit for x402 / MPP servers. Drop-in check plus Bazaar / x402scan / mppscan indexing.

verified · probed 24m ago
Deal Verdict API
deal-verdict-api-production.up.railway.app

Answers one question for any product: is it meaningfully discounted right now at any retailer we can reach? Returns a resolved verdict - deal / no deal / insufficient data - never a data feed.

verified · probed 24m ago
oculr
mpp.oculr.xyz

Agentic triage of onchain transactions: send a transaction hash, get back a structured explanation with risks, protocol identification, and address labels. 50+ EVM mainnets (Ethereum, Base, Arbitrum, BNB Chain, Tempo, and more), chain auto-detected. Fully compatible with MPP. Setup and the full payment contract: https://mpp.oculr.xyz/SKILL.md. Machine-readable tool schemas and measured pricing: https://mpp.oculr.xyz/tool-spec.json.

verified · probed 24m ago
DubbleBlack
agents.dubbleblack.com

DubbleBlack Powder provides aggregated first-party behavioral and verified transaction evidence for product recommendations. Given a vertical, category, and purchase intent, the API returns ranked products with evidence scores, confidence bands, and provenance metadata, so recommendations are grounded in real consumer behavior rather than catalog data alone. When observations are too sparse to support a confident recommendation, the API returns an explicit insufficient evidence signal instead of fabricated results. This server is a pay-per-use, transparent proxy in front of DubbleBlack's own A

verified · probed 24m ago
venture Tempo Data API
venture-mpp.vercel.app
verified · probed 24m ago
Tempo Price Feed
tempo-price-feed-one.vercel.app
verified · probed 24m ago
Tempo Gas Estimator
tempo-gas-estimator-snowy.vercel.app
verified · probed 24m ago
Tempo Price Feed
claude-ivory-mu.vercel.app
verified · probed 24m ago
Agent Commerce Factory
agent-commerce-factory-jm.austriaeast.cloudapp.azure.com

Machine-payable search and commerce data portfolio over x402. USDC settlement on Base.

verified · probed 24m ago
Amazon Intelligence
amazon.lightanchor.ai

Amazon product data and verdicts for agents, run by Light Anchor — an agency operating real Amazon brands. Pay per call via MPP (Tempo stablecoin), no API key, no signup.

verified · probed 24m ago
StableAnalytics
stableanalytics.dev

Prepaid stripped-down web analytics for page visits, sources, UTMs, browsers, operating systems, devices, and recent visits.

verified · probed 24m ago
Face Search
face-search-mpp-production.up.railway.app

Pay-per-call face search API. Upload a photo and get the highest-probability identity matches from across the internet.

verified · probed 24m ago
Cool Coozies API
coolcoozie.com
verified · probed 24m ago
Parallel
parallel.payweave.services

Parallel on PayWeave — 3 discoverable paid endpoints.

verified · probed 24m ago
StableDesign
stabledesign.vercel.app

Pay-per-request access to the full Canva Connect API — designs, assets, brand templates, folders, comments, and more. No API keys, just pay and go.

verified · probed 24m ago
Driftflight via ZeroClick
driftflight.pay.zeroclick.io

AI image generation with style presets: production-quality text-to-image for campaigns, catalogs, and editorial. Three tiers (sketch, studio, gallery), commercial licence and C2PA credentials on every render. This server is a pay-per-use, transparent proxy in front of Driftflight's own API: ZeroClick handles identity, payment, and proxying. Agents can purchase autonomously or with their human's approval. This document is the source of truth for agents: it lists the complete verified paid surface with each operation's live price in its x-payment-info. Endpoints not listed here are not part of t

verified · probed 24m ago
El Nino Wiki Heat-Risk API
mpp.elnino.wiki

A deterministic heat-risk assessment service for Europe and USA city baselines or caller-supplied weather conditions. It returns a transparent risk score, peak-risk window, contributing factors, and tier-specific safety actions.

verified · probed 24m ago
Affiliate.com
zeroclick.affiliate.com

Product catalog search across all Affiliate.com merchants. Search and retrieve products with structured queries, and look up the merchants behind the catalog. This server is a pay-per-use, transparent proxy in front of Affiliate.com's own API: it handles identity, payment, and proxying. Agents can purchase autonomously or with their human's approval. This document is the source of truth for agents: it lists the complete verified paid surface with each operation's live price in its x-payment-info. Endpoints not listed here are not part of the supported catalog. The live catalog at /manifest.jso

verified · probed 24m ago
DeepAI
deepai.pay.zeroclick.io

AI image tools as simple APIs. DeepAI generates images from text, edits photos from plain instructions, removes backgrounds, colorizes black and white photos, and upscales images with standard or creative enhancement. Every call is billed per image; the image generator and photo editor choose a quality tier per request. This server is a pay-per-use, transparent proxy in front of DeepAI's own API: it handles identity, payment, and proxying. Agents can purchase autonomously or with their human's approval. This document is the source of truth for agents: it lists the complete verified paid surfac

verified · probed 24m ago
SocioLogic RNG
rng.sociologic.ai

Cryptographically secure random number generation API with verifiable entropy. Pay per call with USDC on Base via x402.

verified · probed 24m ago
Channel3 MPP API
mpp.trychannel3.com

Pay-per-request product search via the Machine Payments Protocol (MPP) on Tempo. No API key is required on this gateway — unpaid requests receive HTTP 402 with a Tempo payment challenge in WWW-Authenticate. Retry with ``Authorization: Payment`` after settling on-chain ($0.007000 per request).

verified · probed 24m ago
Tempo Wallet Portfolio
tempo-mpp-activity.vercel.app
verified · probed 24m ago
Replicate
replicate.payweave.services

Replicate on PayWeave — 40 discoverable paid endpoints.

verified · probed 24m ago
TermWorks Agent API
www.term.works

TermWorks is a developer opportunity network. Sponsors pay to display contextual messages in developers' terminals; developers earn a 50% share of every impression. This API lets AI agents query audience reach and launch campaigns — no signup required, pay per call with USDC on Tempo.

verified · probed 24m ago
agentschedule
mwork.dev
verified · probed 24m ago
mpp.casino — Last Key Wins
mpp.casino

A "last key wins" jackpot game powered by MPP micropayments on Tempo testnet. Players buy keys for $0.10 each, extending a countdown clock by 30 seconds. When the clock hits zero, the last buyer wins the entire jackpot. Revenue is split: 47.5% jackpot, 47.5% dividends to all key holders, 5% dev fee.

verified · probed 24m ago
tempo-latest-block
tempo-latest-block.vercel.app
verified · probed 24m ago
rh-chain-intel (Tempo) - Robinhood Chain data for AI agents
rh-chain-tempo.vercel.app

On-chain data for Robinhood Chain (Ethereum L2 on Arbitrum, mainnet since July 2026) for AI agents: network health, wallet snapshots and activity scores, a token screener covering tokenized Stock Tokens (NVDA, TSLA, MSTR...) and community tokens, token detail, transaction lookup, and holder-concentration rug check. Free public data (Blockscout + RPC), paid per call via MPP on Tempo (USDC.e). No API key. Public read-only; NOT investment advice.

verified · probed 24m ago
Twitter
twitter.payweave.services

Twitter on PayWeave — 28 discoverable paid endpoints.

verified · probed 24m ago
StableMerch Coozies API
stablemerch-coozies.vercel.app
verified · probed 24m ago
Boulder — LingBot-Map Scene Reconstruction
boulder-api.j-a-nakagawa.workers.dev

Feed-forward 3D scene reconstruction from video. Powered by lingbot-map (Apache-2.0) on a self-hosted GPU. Async wire protocol: enqueue → poll → fetch.

verified · probed 24m ago
Tiny CV Developer API
tiny.cv

Create, validate, publish, and export Tiny CV resumes for users and agents.

verified · probed 24m ago
CitySquatters
citysquatters.com

Claim NYC hex plots, broadcast signs, and breach decaying takeover walls.

verified · probed 24m ago
WeChat Data API
wechat.xpayapi.com

WeChat data endpoints covering WeChat Official Accounts, WeChat Channels video titles, article links and content, article-embedded and downloadable videos, engagement metrics, search, account profiles, rankings, comments, and Sogou link conversion.

verified · probed 24m ago
Data Legion — Person and Company Enrichment APIs
agents.datalegion.ai

Per-call person + company enrichment for autonomous agents, powered by Data Legion. Pay per successful call over agent payment rails; no API key or account.

verified · probed 24m ago
twitr.sh
twitr.sh

Pay-per-call X/Twitter data API for AI agents: single-object reads, tweet/user search, timelines, lists, communities, bulk extractions (23 tools, async with downloadable datasets), real-time account/keyword monitors (prepaid hours; events via free polling or signed webhooks), giveaway draws, trend radar, and an AI tweet composer. No signup, no keys — the wallet is the account. Payment via x402 v2 (USDC on Base/Solana) and MPP (USDC on Tempo). Volume tools bill per returned item against a mandatory resultsLimit; extractions and monitors settle before dispatch.

verified · probed 24m ago
Parallel
parallelmpp.dev

Web search, page extraction, and multi-hop web research.

POST /api/search · $0.01
searchaiwebextractionresearch
verified · probed 24m ago
chess402
chess402.vercel.app

Pay-per-call chess API. x402 + MPP wrappers around popular Lichess endpoints.

verified · probed 24m ago
Tact Game API
tact.wtf

A continuous-time hex strategy and diplomacy game where humans and autonomous agents compete, cooperate, and negotiate on the same battlefield.

verified · probed 24m ago
tempo-activity-score
tempo-activity-score-six.vercel.app
verified · probed 24m ago
Agent Restaurant Reservation API
agentres.dev

Agent-first API for searching and booking restaurant reservations via Resy, including timed reservation requests for hard-to-get tables. Supports MPP (Tempo) and x402 (Base) wallet auth, plus API-key subscription auth ($6/month, paid operations covered). Instant booking costs $0.01 USDC; a timed reservation request costs $3.00 USDC. Failed paid operations are refunded — pay only for success.

verified · probed 24m ago
Search1API
api.search1api.com

Web search, news, crawling, and content extraction APIs for AI agents. Supports pay-per-request via MPP and x402 protocols.

verified · probed 24m ago
Mail
mail.payweave.services

Mail on PayWeave — 9 discoverable paid endpoints.

verified · probed 24m ago
Tempo Wallet Persona
wallet-persona.aiactivityhub.com

Paid MPP endpoint that classifies a Tempo/EVM wallet into a deterministic behavioral persona and activity score for agent routing.

verified · probed 24m ago
Weftly API
api.weftly.ai

AI post-production workflow for content creators. Transcribe, summarize, and process audio and video files. No account required. Two payment rails: Stripe SPT (fiat card payments) and Tempo crypto (USDC via MPP).

verified · probed 24m ago
Tempo Name Resolver
tempo-name-resolver.vercel.app
verified · probed 24m ago
Agent Horoscope
agent-horoscope.vercel.app

AI agent zodiac readings. Every wallet address maps to one of 12 agent zodiac signs. Pay 0.01 USDC per reading. Same wallet = same sign forever. New horoscope every day.

verified · probed 24m ago
Remlo Payroll API
remlo.xyz

Enterprise payroll infrastructure as MPP-native API endpoints. AI agents trigger compliant batch payments, compliance screening, yield queries, and salary streaming via HTTP 402.

verified · probed 24m ago
Stratum
web-production-60258.up.railway.app

Agent-native data brokerage — per-query access to economics, biomedical, legal, and real estate data via x402/MPP micropayments. No accounts, no onboarding.

verified · probed 24m ago
ClaudeLines
claudelines.com

Registry and leaderboard for Claude Code statusline scripts. Installing one runs third-party code on the user's machine. Paid registrations are LLM-audited; free wallet-less submissions are UNAUDITED until someone funds their audit.

verified · probed 24m ago
StableFeedback
stablefeedback.dev

Pay-per-use feedback collection. Register a namespace, collect agent feedback, read it with SIWX auth. Report errors and suggestions here!

verified · probed 24m agoroutable · #3
DisputeTracker Agent Payments API
mpp.disputetracker.xyz

Machine-readable Polymarket and UMA dispute intelligence. Every capability is available through x402 v2 on Base mainnet and MPP on Tempo mainnet. Discovery prices are advisory; validate the runtime HTTP 402 challenge before signing.

verified · probed 24m ago
unfurly
unfurly.xyz

Link Unfurl API. Fetches an HTML page and returns Open Graph / Twitter Card / standard meta as JSON.

verified · probed 24m ago
Face Search
facesearch.dev

Pay-per-call face search API. Upload a photo and get the highest-probability identity matches from across the internet.

verified · probed 24m ago
Fal
fal.payweave.services

Fal on PayWeave — 13 discoverable paid endpoints.

verified · probed 24m ago
FullEnrich — Person and Company Enrichment for Agents
fullenrich.agentscore.com

Per-call B2B person + company enrichment for autonomous agents, powered by FullEnrich. Pay per successful call over agent payment rails; no API key or account.

verified · probed 24m ago
TzKT API
mpp.tzkt.io

TzKT is a comprehensive Tezos blockchain indexer API. Access blocks, operations, accounts, contracts, bigmaps, delegates, tokens and network stats through a fast REST API. No signup or API key required: pay per request via MPP.

verified · probed 24m ago
Minerva API
agentcash.minerva.io

Pay-per-request access to Minerva identity resolution, enrichment, email validation, and person search APIs. No auth, no subscriptions.

verified · probed 24m ago
a9n9 Deep Research Agent
agent.a9n9.net

Objective-driven deep research for AI agents: send an objective, get a fixed quote with a planned source list, pay per request over MPP, and a real cloud browser visits each page and returns a cited cross-source report. Includes free daily quick search over global news and arXiv papers, external-wallet payment handoff, and native MCP tools.

verified · probed 24m ago
NYC Transit Live
transit402.dev

Real-time NYC transit data for agents. Canonical discovery exposes POST JSON operations for subway arrivals, bus ETAs, and Citi Bike pickup/return availability near a coordinate; browser-friendly GET aliases remain supported. Each paid check costs $0.02 via x402 or MPP.

verified · probed 24m ago
DeepTrawler
deeptrawler.com

Live, pay-per-call search over the deep conversation layer across social and messaging platforms. No API keys, no signup; pay per request via x402 or MPP.

verified · probed 24m ago
Agent Launch Readiness API
tempo-agent-intel-api.vercel.app

A machine-readable paid audit API for builders launching MPP, x402, MCP, and agent-payment services.

verified · probed 24m ago
StableSchedule
stableschedule.dev

Prepaid cron scheduling for HTTP webhooks with custom methods, headers, and bodies.

verified · probed 24m ago
OneSource - Ethereum RPC for AI Agents
api.onesource.io

Ethereum mainnet and Sepolia testnet RPC for AI agents. Every endpoint proxies a single live RPC call — wallet and token balances, blocks, transactions, receipts, event logs, ENS name resolution, contract introspection, and NFT metadata — returning fresh data from OneSource-operated Ethereum nodes. No API keys, no accounts, no subscriptions. Pay per call or use batch/session mode: USDC on Base via x402 (per-call `exact` scheme or batch-settlement `x402-batch` scheme), or pathUSD/USDC.e on Tempo via MPP (per-call or `tempo.session`).

verified · probed 24m ago
Celenium API
mpp.celenium.io

Celenium is a comprehensive Celestia blockchain indexer API. Access blocks, transactions, blobs, namespaces, validators, rollups and network stats through a fast REST API. No signup or API key required: pay per request via MPP.

verified · probed 24m ago
Hirescrape
hirescrape.com

Two product surfaces: (1) pay-per-call scrapers for Instagram, LinkedIn, TikTok, TikTok Shop, YouTube, and jobs across 8 boards (per-record pricing at $0.00225, 5,000-record cap, async ≥200 records); (2) the API marketplace at POST /api/skills/{slug}/run — 573 vendor APIs (email finders, people search, maps, web search, weather, LLMs, more) with per-call pricing from $0.03. Both surfaces accept x402 v2 on Base (USDC, EIP-3009 via Coinbase CDP) and MPP on Tempo (USDC). Browse the marketplace at GET /api/skills.

verified · probed 24m ago
x402stock
agents.x402stock.xyz

Market and economic data for AI agents — US stocks, ETFs and options, forex, crypto and on-chain perps, energy commodities (crude, natural gas, gasoline), US and global macro (Fed funds, CPI/PCE, jobs, GDP, Treasury debt & yields, World Bank indicators), SEC filings, congressional trades, and market sentiment. No API keys, no accounts. Pay per request in USDC via x402 or MPP. This server is a pay-per-use, transparent proxy in front of x402stock's own API: it handles identity, payment, and proxying. Agents can purchase autonomously or with their human's approval. This document is the source of

verified · probed 24m ago
Minibase API
api.minibase.md
verified · probed 24m ago
Claim Evaluator
claim-evaluator.com

Fact-check API for agents: likelihood score + web sources. Tempo USDC $0.05/request (MPP); Base USDC $0.05/request (x402); Stripe SPT $0.50/request (Link CLI).

verified · probed 24m ago
Xquik API
xquik.com

Look up any tweet, user, or trend on X. Search tweets, check follower relationships, download media, and monitor accounts in real time. 32 pay-per-use read endpoints work without a subscription — just pay per call. Write endpoints (post, like, retweet, follow, DM) and automation endpoints (bulk extractions, giveaway draws, monitors, webhooks) require an API key or OAuth 2.1 bearer token.

verified · probed 24m ago
StableDomains
stabledomains.dev

Domain registration via micropayments. Pay with USDC. No API keys. No accounts.

verified · probed 24m ago
StableEstate
stableestate.dev

US real estate data API — rental listings, sale listings, property records, valuations, rent estimates, and market statistics. Powered by MLS data via RentCast. All 50 US states.

verified · probed 24m ago
agentfax
agentfax.val.run

Send a fax to any phone number, priced per page. Pay-per-fax for AI agents — no signup, no API key; documents are never stored.

POST /v1/fax
socialfaxdocumentspdfcommunication
verified · probed 24m ago
Surf Twitter
twitter.surf.cascade.fyi

Twitter/X data API with X API v2-compatible response format. All endpoints require x402 or MPP payment (USDC on Solana, Base, or Tempo).

verified · probed 24m agoroutable · #5
Funding Rates Decision API
funding-rates.data-mpp.cloud

Paid funding rate decision API for AI trading agents across up to 16 perp venues. Paid routes require an MPP payment receipt; unpaid requests receive a 402 challenge that lists the per-route price.

verified · probed 24m ago
Cloudflare API
stableflare.dev

Replicate AI models and Cloudflare Browser Rendering via x402 micropayments. No API keys needed.

verified · probed 24m ago
StableMesh
stablemesh.dev

Pay-per-request AI 3D model generation powered by Meshy. Text to 3D, Image to 3D, retexturing, remeshing, rigging, and animation.

verified · probed 24m ago
StableVoice
stablevoice.dev

Pay-per-request text-to-speech on Modal. StableVoice serves the Chatterbox, F5-TTS, VoxCPM2, and Qwen3-TTS open models with bundled voices, optional custom voice references, mp3/wav output, and StableUpload storage slots.

verified · probed 24m ago
glim.sh
glim.sh

One remote endpoint gives your agent live data from Twitter, Reddit, the open web, GitHub and more. No API keys, no scraping stack - just connect the URL and pay per call.

verified · probed 24m agoroutable · #5
Zinc
api.zinc.com

Search, buy, and return items from top online retailers with a single API. Supports AI agent ordering via MPP (HTTP 402) — no account required. Supported retailers include 1-800-Flowers, Ace Hardware, Amazon, Amazon DE, Best Buy, Lowe's, Partstown, Pokémon Center, Target, The Home Depot, TikTok, Walmart, and 3 more. Ships to the US and 1 other country (DE).

verified · probed 24m ago
Surf
surf.cascade.fyi

Pay-per-use research API for AI agents. Twitter, Reddit, GitHub, and web data with x402 micropayments.

verified · probed 24m agoroutable · #5
ip402.xyz GeoIP API
ip402.xyz

Paid IP geolocation and ASN lookup for agents. Send an IPv4/IPv6 address to GET /v1/geo and get normalized geolocation (country, city, location, time zone) and network (ASN, organization) data back. Pay per lookup via x402 (USDC on Base & Solana mainnet) or Tempo MPP (charge); no accounts, no API keys.

verified · probed 24m ago
JMPR — Luxury Hotels API
agent.jmpr.world

Search luxury hotels worldwide — curated 5-star, ultra-luxury, and boutique properties with live rates and real availability. JMPR is the premium hotel API for AI agents: concierge-grade supply with wallet-keyed per-call pricing — no API keys, no accounts, no quotas. Best for: travellers asking for the best hotel, luxury, 5-star, ultra-luxury, boutique resorts, premium suites, top-of-market stays. Read-only discovery (search + detail) plus bookings via two settlement rails: agentic wallet (Tempo USDC) or end-user card checkout. Production base URL: https://agent.jmpr.world

verified · probed 24m ago
StableCrypto
stablecrypto.dev

Crypto market data APIs powered by CoinGecko, DefiLlama, Alchemy, and Etherscan, protected by x402 micropayments.

verified · probed 24m ago
Tempo Activity Score
tempo-mpp.vercel.app

Returns an activity score (0–100) for any Tempo wallet address, based on USDC.e balance and transaction count.

verified · probed 24m ago
Stablecoin Peg Monitor
peg.ivan-tempo.xyz

Real-time peg status, deviation, volatility and stability scoring for major USD stablecoins. Pay-per-call over MPP on Tempo (USDC.e, gas-abstracted).

verified · probed 24m ago
Random Stable Fact
randomfactmpp.com

Pay-per-request API that returns random facts about stablecoins.

verified · probed 24m ago
Word of the Day
daily-financial-word.vercel.app

Financial & crypto term of the day in EN, FR, ES, DE. $0.01 USDC.e per request.

verified · probed 24m agoroutable · #6
Mobula API
mpp.mobula.io

Onchain trading backend for trading apps, bots, and traders. Swap routing and execution across 90+ EVM chains and Solana (Uniswap v2/v3/v4, PancakeSwap, SushiSwap, Curve, Raydium, Jupiter) plus launchpad and bonding-curve coverage (PumpFun, Meteora, Raydium Launchlab, FourMeme). Cross-chain bridging through Mobula's own router. Real-time and historical market data: token prices, OHLCV candles, DEX trades, holder and trader analytics, wallet portfolios with PnL, DeFi position tracking, on-chain wallet labels, and token security audits. Live Pulse feed of new token launches and trending pairs. O

verified · probed 24m ago
Tempo Wallet Snapshot
tempocheck.xyz

Paid API returning Tempo wallet stats: TIP-20 stablecoin balances, account type, nonce, and (in deep mode) 7-day activity. Charges USDC.e via MPP.

verified · probed 24m ago
StableFinance
stablefinance.dev

Pay-per-request access to Financial Datasets AI: US equities fundamentals, prices, SEC filings, 13F, insider trades, KPIs, and central-bank rates. No auth, no subscriptions.

verified · probed 24m ago
honeypot
honeypot.ivan-tempo.xyz

Multi-chain token honeypot and security checker for AI agents. Detects honeypots, taxes, owner privileges, blacklist functions, and contract vulnerabilities across 8+ EVM chains via GoPlus Security API.

verified · probed 24m ago
Crypto News Aggregator
cryptonews.ivan-tempo.xyz

Real-time crypto news aggregation across major RSS sources with trending topics, per-coin filtering, full-text search, and keyword sentiment scoring. Pay-per-call over the MPP protocol on Tempo (USDC.e).

verified · probed 24m ago
Agent402.Tools - 500+ pay-per-call tools for AI agents over x402 + MPP
agent402.tools

The open-source, self-hostable applied layer of Agentic Finance - agents paying and getting paid over x402 and MPP: 500+ machine-payable web tools for AI agents in one place (browser, search, PDFs, images, live data, payment helpers) - the whole catalog is open and runnable yourself. Every endpoint is paid per call in USDC on Base, Solana, Polygon, Arbitrum, Monad, Celo, Avalanche, Sei, Optimism, Stellar, or Algorand - or USDG on Robinhood Chain over x402, or over MPP (Machine Payments Protocol: USDC on Base/Celo, or USDC.e (and PathUSD) natively on Tempo) - no signup, no API keys - the first

verified · probed 24m agoroutable · #4
Trellis
api.trellismarket.com

Structured financial intelligence for autonomous agents.

verified · probed 24m ago
TX Decoder
txdecode.ivan-tempo.xyz

Decode EVM transactions, calldata, event logs and function selectors across Ethereum, Base, Arbitrum, Optimism, Polygon and BNB Smart Chain. Paid via MPP — gas abstracted, no API keys.

verified · probed 24m ago
Pinata IPFS
mpp.pinata.cloud

Paid Pinata IPFS storage — upload and download public files via MPP.

POST /v1/pin/public
storageipfspinatafilesuploaddownload
verified · probed 24m ago
QR Code Service
qr.ivan-tempo.xyz

QR code generation and scanning for AI agents. PNG, SVG, WiFi, vCard, batch, and image decode. Paid via MPP on Tempo network.

verified · probed 24m ago
mppgas
gas.ivan-tempo.xyz

Multi-chain gas toolkit. Gas prices, EIP-1559 breakdown, 30-min forecasts, spike detection, and cheapest-time finder for Ethereum, Base, Arbitrum, Optimism, Polygon, BSC, Tempo.

verified · probed 24m ago
Identity Resolver
id.ivan-tempo.xyz

Resolve Web3 identities across ENS, Farcaster, and Lens Protocol

verified · probed 24m ago
ATXP
hub.atxp.ai

ATXP is the account for AI agents — identity, payments, communication, and tools in one platform. Fully compatible with x402 and MPP: ATXP-enabled agents can buy from and sell to any x402 or MPP server or client. Learn more at https://atxp.ai or read the docs at https://atxp.ai/SKILL.md

verified · probed 24m ago
OpenRouter
openrouter.mpp.tempo.xyz

Unified API for 100+ LLMs with live per-model pricing.

POST /v1/chat/completions
aillmunifiedmulti-modelchat
verified · probed 24m agoroutable · #1
OpenAI
openai.mpp.tempo.xyz

Chat completions, embeddings, image generation, and audio with model-tier pricing.

POST /v1/responses
aimediallmgpt-4odall-ewhisper
verified · probed 24m agoroutable · #1
SerpApi
serpapi.mpp.tempo.xyz

Google Flights search — real-time prices, schedules, and booking options.

GET /search · $0.015
searchdataflightsgoogleprices
verified · probed 24m agoroutable · #1
Allium
agents.allium.so

System of record for onchain finance. Real-time blockchain data: token prices, wallet balances, transactions, PnL, and SQL explorer.

POST /api/v1/developer/prices · $0.02
blockchaindatapricestokenswalletbalances
verified · probed 24m ago
AviationStack
aviationstack.mpp.tempo.xyz

Real-time and historical flight tracking, airports, airlines, and schedules.

GET /v1/aircraft_types · $0.005
dataflightsaviationtrackingairportsairlines
verified · probed 24m agoroutable · #1
StablePhone
stablephone.dev

AI phone calls, dedicated phone numbers, and iMessage/FaceTime lookup — pay per request.

POST /api/call · $0.54
aisocialphonecallvoiceai-call
verified · probed 24m ago
StableSocial
stablesocial.dev

Pay-per-request social media data from TikTok, Instagram, Facebook, and Reddit.

POST /api/tiktok/profile · $0.06
socialdatatiktokinstagramfacebookreddit
verified · probed 24m ago
StableStudio
stablestudio.dev

Pay-per-generation AI image and video creation — Nano Banana, GPT Image, Grok, Flux, Sora, Veo, Seedance, and Wan.

POST /api/generate/nano-banana/generate · $0.039
aimediaimagevideogenerationnano-banana
verified · probed 24m ago
StableUpload
stableupload.dev

Pay-per-upload file hosting and static site hosting with custom domains — 6 month TTL.

POST /api/upload
storageuploadfileshostingstatic-sitecdn
verified · probed 24m ago
GoFlightLabs
goflightlabs.mpp.tempo.xyz

Real-time flight tracking, prices, schedules, and airline data.

GET /airports-by-filters · $0.005
dataflightstrackingpricesairlinesairports
verified · probed 24m agoroutable · #1
2Captcha
twocaptcha.mpp.tempo.xyz

CAPTCHA solving API — reCAPTCHA, Turnstile, hCaptcha, image captchas, and more.

POST /createTask · $0.003
webcaptchaautomationsolving
verified · probed 24m agoroutable · #1
KicksDB
kicksdb.mpp.tempo.xyz

Sneaker & streetwear market data — prices, sales history, and availability from StockX, GOAT, and more.

GET /v3/stockx/products · $0.0005
datasneakersstreetwearpricesstockxgoat
verified · probed 24m agoroutable · #1
StableEnrich
stableenrich.dev

Pay-per-request research APIs — people, companies, web search, scraping, places, social media, and contact enrichment.

POST /api/apollo/people-search · $0.02
datasearchsocialapolloexafirecrawl
verified · probed 24m agoroutable · #3
Anthropic
anthropic.mpp.tempo.xyz

Claude chat completions (Sonnet, Opus, Haiku) via native and OpenAI-compatible APIs.

POST /v1/messages
aillmclaudesonnetopushaiku
verified · probed 24m agoroutable · #1
StableEmail
stableemail.dev

Pay-per-send email delivery, forwarding inboxes, and custom subdomains — no API keys or accounts.

POST /api/send · $0.02
socialemailsendinboxforwardingsubdomain
verified · probed 24m ago
SpyFu
spyfu.mpp.tempo.xyz

Competitor keyword research — SEO rankings, PPC ads, ad history, and domain analytics. 18+ years of historical data.

GET /apis/domain_stats_api/v2/* · $0.01
datasearchseoppckeyword-researchcompetitor-analysis
verified · probed 24m agoroutable · #1
Code Storage
codestorage.mpp.tempo.xyz

Paid Git repository creation — create repos and get authenticated clone URLs.

GET /repos/:id · $0.01
storagegitreposcode
verified · probed 24m agoroutable · #1
Oxylabs
oxylabs.mpp.tempo.xyz

Web scraping API with geo-targeting by country, state, and city. Fetch any public URL with JavaScript rendering support.

POST /v1/proxy
webdatascrapingweb-scrapinggeo-targetingdata-extraction
verified · probed 24m agoroutable · #1
Tempo RPC
rpc.mpp.tempo.xyz

Tempo blockchain JSON-RPC access (mainnet and testnet).

POST / · $0.001
blockchainrpcjson-rpcevmtemponode
verified · probed 24m agoroutable · #1
Object Storage
storage.mpp.tempo.xyz

S3/R2-compatible object storage with dynamic per-size pricing.

GET /:key
storages3r2objectsblobsfiles
verified · probed 24m agoroutable · #1
RecallRadar
api.recallradar.dev

Search normalized consumer-product safety notices from six public authorities with recall classification, hazards, remedies, and provenance.

GET /v1/recalls · $0.1
datasearchrecallsproduct-safetycompliancehazards
verified · probed 24m ago
Alchemy
mpp.alchemy.com

Blockchain data APIs including Core RPC APIs, Prices API, Portfolio API, and NFT API across 100+ chains.

POST /:network/v2 · $0.0001
blockchaindatarpcjson-rpcnftevm
verified · probed 24m ago
RxAtlas
api.rxatlas.dev

Search normalized US drug products with source-linked FDA, DailyMed, RxNorm, NADAC, shortage, and enforcement enrichments.

GET /v1/drugs · $0.1
datasearchdrugsndcfdarxnorm
verified · probed 24m ago
Doma
mpp.doma.xyz

Domain registration on the Doma blockchain. Instantly register .com, .xyz, .ai, .io, and .net domains.

POST /register
webblockchaindomainsdns
verified · probed 24m ago
TrialBase DB
api.trialbase-db.org

Search normalized clinical trials from ClinicalTrials.gov, CTIS, EudraCT, and ISRCTN with registry identifiers and source-linked evidence.

GET /v1/trials · $0.1
datasearchclinical-trialsregistrieshealthcareresearch
verified · probed 24m ago
Apex DB
api.apex-db.org

Search normalized vehicle variants, specifications, emissions, and source-linked provenance from public automotive datasets.

GET /v1/apex · $0.1
datasearchautomotivevehiclesemissionsspecifications
verified · probed 24m ago
AgentMail
mpp.api.agentmail.to

Email inboxes for AI agents.

GET /v0/inboxes
aisocialemailinboxesdomainsdrafts
verified · probed 24m ago
Modal
modal.mpp.tempo.xyz

Serverless GPU compute for sandboxed code execution and AI/ML workloads.

POST /sandbox/create
computegpuserverlesssandbox
verified · probed 24m agoroutable · #1
Exa
api.exa.ai

Neural web search and page-content retrieval for AI agents, paid per request with no API key.

POST /search
searchaiweb-searchcontentai-search
verified · probed 24m ago
fal.ai
fal.mpp.tempo.xyz

Image, video, and audio generation with 600+ models (Flux, SD, Recraft, Grok).

POST /fal-ai/flux/dev · $0.025
aimediaimagevideofluxstable-diffusion
verified · probed 24m agoroutable · #1
Firecrawl
firecrawl.mpp.tempo.xyz

Web scraping, crawling, and structured data extraction for LLMs.

POST /v1/scrape · $0.002
webdatascrapingcrawlingextractionllm
verified · probed 24m agoroutable · #1

356 candidate origins discovered, 178 independently verified so far - a gap is normal (re-probe pending, or a listing that no longer answers), never hidden.

HOW THIS INDEX IS BUILT

Crawled and verified, not curated

01Discovery: the public mpp.dev services registry, MPPScan's origin list, and anyone who self-registers at POST /api/mpp-index/register.
02Every listed origin gets a real, unpaid request to one of its actual advertised endpoints (from the registry, the seller's own /openapi.json discovery document, or the submitter's hint) - a registry claim alone never counts.
03A listing counts as verified only when that request genuinely comes back with a WWW-Authenticate: Payment challenge.
04A crawl cycle re-probes every known origin every 30 minutes; a seller that stops answering drops out of the verified count on its own.

Two known scope limits, disclosed rather than hidden: sellers hosted as per-tenant paths on one shared gateway domain aren't discoverable yet, and self-serve registration for a seller not already in the mpp.dev registry probes the bare origin root unless the submitter names the priced path (the optional path field, or a path property in the POST body) - MPP has no standard discovery path the way x402's /.well-known/x402 is.

About this index.

What is the MPP marketplace?

A directory of services that accept payments over MPP (the IETF-track "Payment" HTTP auth scheme). Every listing here has been independently, live-verified - a real unpaid request confirming the seller's endpoint genuinely answers with a WWW-Authenticate: Payment challenge - not just copied from a registry's claim.

How is this different from Agent402's x402 marketplace?

Different protocol, different seller population, and a separate crawler entirely. An MPP seller isn't necessarily an x402 seller and vice versa; Agent402 itself supports both, as a buyer-facing wire translation on its own tools and as a neutral index for each ecosystem.

How does a seller get listed?

Three ways, all free and automatic: appear in the public mpp.dev registry or on MPPScan (both crawled), answer an MPP challenge on a 402 our x402 crawler already probes (dual-stack sellers are detected without any listing), or register directly - the form above, or POST /api/mpp-index/register with your origin and, optionally, the priced path your 402 lives on. There is no review queue: verification is a real unpaid probe, and a listing appears as soon as it comes back with WWW-Authenticate: Payment.

How is the MPP leaderboard ranked?

By what the chain shows, not by what anyone claims: for every verified seller we take the recipient address its live MPP challenge names, then count inbound USDC.e transfers to that address on Tempo over the most recent read window (24 hours from Tempo's own transfer index when it is available, otherwise about fifteen hours of blocks read from the RPC, its per-query cap), plus distinct payers and volume. It is a window, not lifetime, and an inbound transfer is a proxy for a settlement rather than proof of one - the same proxy Agent402's own router requires before it spends money with a seller, which is why rows at or above the floor are marked routable.

Why do discovered and verified counts differ?

Discovery finds candidate origins from the mpp.dev registry and MPPScan; verification is our own real probe of each one. A gap between the two is normal - a fresh discovery awaiting its first probe, or a listing that no longer answers - and is always shown, never hidden.

machine-readable: /api/mpp-index · /api/mpp-leaderboard · upstream registry mpp.dev/api/services