Skip to content

A2A earnings → wallet ranking, coverage and attribution

Explore the evidence index

Agent directory

Every A2A agent + paid API we've discovered, live-probed, and ranked. Filter to domain-verified agents, the subset with observed on-chain inflow, or one of the 12 category buckets.

protocol All A2A only Paid APIs Domain verified ✓ Has on-chain inflow
category All Data 310 AI 118 Verification 90 Finance 71 Blockchain 50 Other 27 Content 20 Compute 9 Storage 3 Media 3 Infrastructure 3 Social 2
sort Quality Revenue (30d) Recently updated Name
Showing 721–756 of 3,228
Why this order?
Results are sorted by ranking quality: card completeness, 30-day uptime, a live probe and a verified signature (for a catalogue listing: how complete the listing is), shown as "q" on each card. Each agent page grades the agent with the 0–100 conformance score from our 9-criterion methodology (valid agent card, live probe, protocol version, signed card, uptime, skills declared, verified identity, freshness, security declaration). Machine-readable schema: conformance.json. No paid placement, no editorial weights.
Devryno devryno.com
q 85

Tiny paid web services for agents. Current commerce wedge: compare merchant feed price/currency/availability with public product-page signals, audit Product/Offer JSON-LD/OpenGraph/microdata/visible text, and generate repair drafts.

paid API data x402
$0.03 · 30d 18 tx
Premium Rewards data GETs api.premiumrewards.vip
q 85

Six x402 GETs on Base USDC. Spot FX $0.01: one ECB reference conversion (informational only, not for transaction use; same rates free at https://www.ecb.europa.eu; not sold or endorsed by the ECB). One Sense $0.02: first Wiktionary sense (C…

paid API data x402
$0.03 · 30d 11 tx
Eve's Wire www.watchevelive.com
q 85

Eve's Wire is a paper Polymarket desk agent. $50 USDC (Coinbase CDP EIP-3009, Circle Gateway, or Circle Facilitator Service on Arc) for a live wire stamp (/stamp), the live paper book (/desk), or the Robinhood Gap stock record (/gap); $0.05…

paid API finance x402
$0.45 · 30d 9 tx
Frantic gofrantic.com
q 85

Outsource a task to AI agents on the Frantic bounty board. Fund a bounty with Base USDC, agents claim it and deliver artifacts in the open, and they are paid only when delivery is accepted, with every claim, judgment, and payout sealed to a…

paid API other x402
$139.25 · 30d 337 tx
euroref — European government reference data euroref.dev
q 85

European government reference data as clean, cited JSON: ECB and Bank of England policy rates, VAT with reduced and zero bands, corporate and personal income tax, minimum wages, CPI inflation, statutory late-payment interest, official centr…

paid API data x402
$6.23 · 30d 119 tx
Nesebar travel corpus nesebar.net
q 85

330 verified travel and heritage guides to Nesebar and the Bulgarian Black Sea coast, in Bulgarian and English, as source markdown. Whole corpus $5.00, a single article $0.01, and ?since=<ISO date> returns only what changed at the same pric…

paid API content x402
$0.01 · 30d 1 tx
Genuine Good Grants / Good Grants API genuinegood.online
q 85

A human-reviewed Grants.gov research and screening API from Genuine Good News, with current-search normalization, sourced detail, transparent fit signals, decision-ready briefs, deterministic preflight checks, and a 30-day agent pass.

paid API data x402
$0.45 · 30d 9 tx
ThirdMade Shelf shelf.thirdmade.net
q 85

24 pay-per-call probe endpoints for AI agents: web scraping + page metadata, claim verification, content AI (summarize / jsonify / sentiment), safety guards (prompt-injection, PII, hallucination, JSON), and blockchain data (gas, chain stats…

paid API data x402
$0.20 · 30d 52 tx
Citable citable.run
q 85

SEO and AI-visibility data agents buy per call. 17 GET endpoints: keyword research and metrics, on-page audits, AI-citation checks across ChatGPT, Claude, Gemini and Perplexity, rank and SERP checks, domain overview/keywords/history, and ba…

paid API data x402
$6.22 · 30d 145 tx
ContextIQ contextiq.trango-compute.com
q 85

ContextIQ is an Agentic Commerce & Context Engineering tooling company.

paid API ai x402
$5.11 · 30d 76 tx
Northeast Deal Intel api.northeastdealintel.com
q 85

Commercial real estate intelligence API for 9 Northeast US states. 10K+ AI-scored deals, 130K+ closed comps, cap rate benchmarks, 1031 exchange matching, OZ deal feed, and submarket intel. Pay per call in USDC on Base mainnet — no signup re…

paid API data x402
$1.04 · 30d 108 tx
Saylor Innovations Agent API & x402 Bazaar saylorinnovations.com
q 85

A broad production x402 API marketplace for autonomous agents: 250+ live data, research, finance, blockchain, scientific, legal, developer and reference endpoints with complete Bazaar schemas, OpenAPI and Streamable HTTP MCP discovery. No a…

paid API data x402
$0.01 · 30d 10 tx
SniperX•x402 x402.sniperx.fun
q 85

SmartTrader (KOL/SmartMoney/Whale) activity and analytics on Alpha and Newpair. High-quality server for next-generation autonomous agents, data products, and prediction markets.

paid API data x402
$56.60 · 30d 2,839 tx
latamref — Latin American government reference data latamref.dev
q 85

Latin American and Caribbean government reference data as clean, cited JSON: central-bank policy rates, VAT, corporate and personal income tax, minimum wages, CPI inflation, statutory interest, official FX fixes (Brazil's PTAX, Colombia's T…

paid API data x402
$6.23 · 30d 119 tx
Sentinel Global Check sentinel.rootstuff.io
q 85

Check any URL from four monitoring regions at once (US East, US West, EU, Asia) and get per-region reachability and latency with a consensus verdict. $0.02 per check, no account needed. Runs on Sentinel's production uptime monitoring fleet.…

paid API verification x402
$1.09 · 30d 31 tx
Anansi Data anansidata.xyz
q 85

Velocity, anomaly (z-score) and peer-rank signals computed from a continuously accumulated archive of 40+ live public sources: cloud spot pricing, prediction markets, perp funding, LLM model pricing, grid load, US Treasury rates, space weat…

paid API data x402
$18.84 · 30d 215 tx
Prism Network api.prismnetwork.tech
q 85

Rent a dedicated NVIDIA GPU by the second, or call managed inference, paying per request in USDC on Base or USDG on Robinhood Chain. An agent reads the price from the 402, pays from the wallet it already has, and gets the machine to itself:…

paid API compute x402
$0.01 · 30d 1 tx
Onchain Query API chain.cyberwarex.com
q 85

Pay-per-call EVM chain data for AI agents: wallet balances, token profiles with live DEX market data, spot prices, gas market, decoded transactions, ENS. Base, Ethereum, Arbitrum, Optimism, Polygon. No API keys or node infra - one x402 USDC…

paid API blockchain x402
$11.97 · 30d 1,715 tx
WorxAI Synthetic Datasets worxai.tech
q 85

19 production-ready synthetic datasets for AI agent training and testing — financial markets, x402 agent payment traces, MCP tool-call transcripts, healthcare claims, IoT sensor logs. Generated on demand, purchasable individually. USDC on B…

paid API ai x402
$6.21 · 30d 142 tx
NSGoods Payable Preflight payable.nsgoods.org
q 85

Signed x402 payability preflight. Before an agent pays an endpoint, one call returns whether the counterparty can actually receive the payment: verdict plus reason classification, method aware (GET and POST), Solana ATA existence checked on…

paid API verification x402
$1.67 · 30d 164 tx
Kael Ecosystem Pulse kael-ecosystem-pulse.onrender.com
q 85

Paid 24h Solana ecosystem digest via x402 Exact SVM USDC (PayAI). Lane-tagged narratives plus headlines ($0.02), delta ($0.08), evidence ($0.05); free sample. Informational synthesis only — not financial advice or trading signals.

paid API data x402
$0.12 · 30d 6 tx
Proofivy Library (CryptoSlate + The Phoblographer) library.proofivy.com
q 85

x402 micropayment APIs for publisher content. Agents pay USDC on Base to fetch CryptoSlate and The Phoblographer articles (POST with content_url) plus listing endpoints. Humans stay free on the publisher sites.

paid API content x402
$0.20 · 30d 20 tx
YiduoChan API Credits yiduochan.com
q 85

Prepaid credits and pay-per-call inference for MiniMax models over x402. Pay USDC on Base or Arbitrum and receive a working OpenAI-compatible API key in the response — no account, email or signup. Serves MiniMax-M2.7 and M2.7-highspeed for …

paid API ai x402
$0.21 · 30d 3 tx
PageProof pageproof.alert-crab-1890.chatgpt.site
q 85

PDF embedded-text extraction for AI agents: page-numbered JSON and SHA-256 hashes. 0.005 USDC on Base per successful PDF, up to 25 pages and 2 MiB. No OCR or LLM.

paid API other x402
$0.01 · 30d 1 tx
usaref — North American government reference data usaref.dev
q 85

North and Central American government reference data as clean, cited JSON: central-bank policy rates, VAT and sales tax, corporate and personal income tax, minimum wages, CPI inflation, official FX fixes and public holidays across 10 countr…

paid API data x402
$6.23 · 30d 119 tx
santyvv-data x402.santyvv.com
q 85

Pay-per-call market and on-chain data API over x402 (USDC on Base): multi-venue consensus crypto prices, DeFi TVL and stablecoin supply, DEX volume and protocol fees, yield pool history, and keyless read-only on-chain reads (balances, recei…

paid API data x402
$2.61 · 30d 144 tx
BABYDOV Agent Microstore — Paid Work & Web Evidence APIs vps-62-120.cloudhosting.lv
q 85

Agent-native x402 APIs for low-cost paid-work discovery, public-web extraction and reproducible source evidence, plus HTTP health/preflight utilities. No account or API key; pay per call in USDC. Canonical stable VPS origin.

paid API data x402
$94.34 · 30d 516 tx
PayForAPI resale doors — people enrichment + web search funding.payforapi.com
q 85

Pay-per-call data for AI agents, USDC on Base via x402 (HTTP 402), no account, no API key. People enrichment (LinkedIn/e-mail/name+domain), people search by title/company, company enrichment, work e-mail finder, global web search, crypto pr…

paid API data x402
$2.46 · 30d 21 tx
Fin Codes API api.fincodesapi.com
q 85

IBAN validation, SWIFT/BIC lookup, bank and branch reference data, Verification of Payee for supported SEPA accounts, and sanctions screening against the EU, UK, UN, OFAC, Swiss, Australian and Canadian lists.

paid API finance x402
$0.54 · 30d 11 tx
Demand Factory Base x402 Courier api-v2.appdeploy.ai
q 85

Program-callable Base USDC x402 service for agent payment/courier verification and machine-readable settlement workflows.

paid API blockchain x402
$0.02 · 30d 7 tx
Economic Agent Redirect Contract Verifier x402.plutonus.tech
q 85

Safely follow bounded public HTTP redirects and compare the final URL with the expected target; return a deterministic verdict and reason code.

paid API verification x402
$0.13 · 30d 13 tx
eu-validate 88-198-100-115.sslip.io
q 85

Validates an IBAN (offline mod-97), an EU VAT number (live via VIES) and/or a company domain (DNS/MX) in one x402 call. $0.01 USDC per call on Base.

paid API verification x402
$32.10 · 30d 10 tx
mearef — Middle Eastern government reference data mearef.dev
q 85

Middle Eastern government reference data as clean, cited JSON: central-bank policy rates, VAT, corporate and personal income tax, minimum wages, CPI inflation, statutory interest, withholding tax, social contributions and public holidays ac…

paid API data x402
$6.23 · 30d 119 tx
x402 OFAC SDN API x402-ofac-api.vercel.app
q 85

OFAC SDN / sanctions screen for AI agents. Pay-per-call USDC on Base and Solana via x402. Public prices: https://x402-ofac-api.vercel.app/pricing. Terms: https://x402-ofac-api.vercel.app/terms. Potential matches only — not clearance.

paid API finance x402
$5.33 · 30d 13 tx
BRIJ Travel travel.brij.fi
q 85

Pay-per-call flight search and booking API via x402 (USDC on Solana). Live airline inventory, escrow-backed booking intents, order status, and refunds. No merchant onboarding.

paid API other x402
$76.59 · 30d 37 tx
ausref — Australasian government reference data ausref.dev
q 85

Australasian government reference data as clean, cited JSON: central-bank policy rates, VAT/GST, corporate and personal income tax, minimum wages, CPI inflation, statutory interest, withholding tax, social contributions and public holidays …

paid API data x402
$6.23 · 30d 119 tx