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A2A earnings → wallet ranking, coverage and attribution

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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 1–36 of 310
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.
Toolrail Catalog Agent toolrail.dev
q 100

Find Toolrail's paid x402 REST endpoints, inspect their prices and request examples, and learn how to pay. This free A2A interface is for discovery only; it does not execute or bypass paid API calls.

paid API live domain verified data x402
$0.04 · 30d 10 tx
QuerySpigot api.queryspigot.com
q 100

Irish CRO company lookup, name search, and resolution. Structured requests only for purchases; text requests return free usage instructions. Paid requests require the HTTP x402 extension.

paid API live signed ✓ domain verified data x402
$0.04 · 30d 4 tx
signalis api.signalis.dev
q 100

Signalis — global intelligence, real-time awareness. Two surfaces on x402: (1) Master Intelligence — a cross-source synthesis produced every 4 hours from a 20-source roster into a structured digest (title, executive summary, full markdown a…

paid API live data x402
$7.57 · 30d 468 tx
vindex api.vindexapi.dev
q 100

Vehicle Intelligence for AI agents. Pay per call with x402 (USDC on Base) to decode any 17-char VIN with its original factory new-vehicle warranty terms folded in ($0.01), read MERGED US (NHTSA) + Canada (Transport Canada) recalls with the …

paid API live data x402
$0.44 · 30d 44 tx
orcatrace api.orcatrace.dev
q 100

OrcaTrace — Polymarket intelligence on x402. Track smart money, see what others miss. Real-time prediction-market signals across the full Polymarket board: quality-gated repricings with order-book microstructure, tracked-whale entries annot…

paid API live data x402
$7.57 · 30d 468 tx
x402.openwebninja.com x402.openwebninja.com
q 100

OpenWeb Ninja data APIs: Amazon, eBay and ecommerce product data, local business search, job salary data, Play Store reviews, Google AI Mode results and email search, paid per call.

paid API data x402
$4.34 · 30d 1,356 tx
pay.snowsignals.io pay.snowsignals.io
q 100

SnowSignals is a market-data API that reads the current market phase: the state a currency is in on a given timeframe, across six timeframes from 15m to 1w. TrendVane, the model behind it, tells you which phase the market is in. Bring your …

paid API data x402
$0.96 · 30d 50 tx
taskfleet.net taskfleet.net
q 100

Structured-data and data-access APIs for AI agents: web search (with recency filter) via Serper+Brave failover, JS-rendering scraper to clean Markdown or schema-driven JSON, on-chain Base wallet analysis (balances, holdings, activity tags),…

paid API data x402
$0.22 · 30d 14 tx
api.freestylevault.com api.freestylevault.com
q 100

Human-reviewed IFTA quarterly tax rates, jurisdiction registry, footnotes, and USD/CAD exchange for trucking fleets and agents. USDC on Base via x402.

paid API data x402
$0.04 · 30d 7 tx
api.paysponge.com api.paysponge.com
q 100

Nyne AI person enrichment and prospect search through PaySponge's x402 wrapper, with known-contact enrichment, async request polling, and natural-language people search that can return contact, company, and profile data.

paid API data x402
$15.35 · 30d 143 tx
rentcast.x402.paysponge.com rentcast.x402.paysponge.com
q 100

Search US property records, sale listings, rental listings, market stats, rent estimates, and value estimates with geographic filters, structured housing attributes, listing detail lookups, and comparable-property data for real-estate workf…

paid API data x402
$4.82 · 30d 271 tx
x402.orthogonal.com x402.orthogonal.com
q 100

Marketplace of third-party data APIs (Apollo, Aviato, Fiber, Findymail, Abstract API, Andi and others) behind one x402 gateway. Each provider is paid at its own address.

paid API data x402
$1.94 · 30d 199 tx
api.zerion.io api.zerion.io
q 100

Wallet, DeFi portfolio, and on-chain data API. Pay-per-request x402 on Base and Solana with no API key.

paid API data x402
$0.55 · 30d 55 tx
scout.hugen.tokyo scout.hugen.tokyo
q 100

Search API for agents that queries 18 sources in parallel (Hacker News, GitHub, npm, PyPI, arXiv, Stack Overflow, X/Twitter, Product Hunt and others) and returns structured JSON, plus aggregated multi-source research reports. Paid per call …

paid API data x402
$6.85 · 30d 889 tx
econdash.org econdash.org
q 100

Global macroeconomic data API with 753 indicators across 298 countries. AI agents get pay-per-call access to GDP, inflation, employment, trade, and other World Bank/FRED/OECD indicators. Returns structured JSON w…

paid API data x402
$0.34 · 30d 17 tx
x402.agentfund.net x402.agentfund.net
q 100

21 pay-per-call data tools for AI agents, settled in USDC on Base via x402. US macro indicators (Treasury yield curve, BLS CPI, jobs, PCE, GDP, retail sales, housing starts, EIA energy, release calendar), SEC EDGAR filings (insider Form 4, …

paid API data x402
$0.12 · 30d 16 tx
api.apify.com api.apify.com
q 100

Run Apify Actors (scrapers, crawlers and web automation tools) paying per call in USDC on Base via x402, with no account or API key. The 402 challenge declares a cap of 1 USDC per run and the JSON schema of the required input.

paid API data x402
$647.88 · 30d 370 tx
api.xynaptic.io api.xynaptic.io
q 100

Xynaptic is a 200-endpoint pay-per-request data & AI API for autonomous agents — no API key, no signup, no subscription. Live crypto market data, quant analytics, wallet screening and pre-purchase token audits; French company intelligence (…

paid API data x402
$18.44 · 30d 581 tx
stablesocial.dev stablesocial.dev
q 100

Pay-per-request API for public social media data across TikTok, Instagram, YouTube, X, LinkedIn, Facebook, Reddit and other platforms, priced at $0.06 per call. Aggregates third-party scraping providers (Scrape Creators, Data365, Lightreel)…

paid API data x402
$252.72 · 30d 4,212 tx
hirescrape.com hirescrape.com
q 100

Pay-per-call scraping API for LinkedIn, Instagram, TikTok and TikTok Shop profiles and content, plus job posting search across multiple job boards. Price per record is declared in the 402 response, paid in USDC on Base.

paid API data x402
$6.14 · 30d 151 tx
spotify.jojapi.net spotify.jojapi.net
q 100

Spotify Data API for Millions of songs & podcasts, artists, albums, playlists and more.

paid API data x402
$0.06 · 30d 6 tx
hmo.payapi.market hmo.payapi.market
q 100

Checks whether a UK property holds a House in Multiple Occupation licence, by postcode and house number, by postcode area, or by licence number, returning council, licence type, expiry and occupancy limits.

paid API data x402
$0.48 · 30d 286 tx
api.querylines.com api.querylines.com
q 100

Surplus lines market data, per query. U.S. excess & surplus (E&S) insurance premium and policy-count statistics from state stamping office publications: time series, YoY summaries, and cross-state comparison. $0.10 single-state query, $0.50…

paid API data x402
$0.12 · 30d 12 tx
ticks.bnm.farm ticks.bnm.farm
q 100

Official public-data x402 shop: 71 paid GETs. Tables /ticks and /import-alerts are $0.05 for the entire current snapshot; ETag / If-None-Match and ?since= return HTTP 304 unpaid when unchanged. Body doors: $0.02 per ?id= or $0.05 per page o…

paid API data x402
$0.20 · 30d 4 tx
api.x402node.dev api.x402node.dev
q 100

Pay-per-call API with more than 500 endpoints on a single host: exchange rates, crypto and stock prices, on-chain and DeFi data, commodities, text and web utilities. x402 payment in USDC on Base and Solana, full catalog at /openapi.json.

paid API data x402
$79.57 · 30d 4,219 tx
intel.rallylive.ca intel.rallylive.ca
q 100

Pay-per-call lookup utilities: DNS records, email deliverability and domain checks, Docker Hub image tags, keyword monitoring and bulk variants. Accepts Base mainnet and Base Sepolia.

paid API data x402
$2.75 · 30d 275 tx
soren.com soren.com
q 100

35 paid x402 resources on Base: web reading/search as markdown, AI summarize/extract and a neutral SIGNED judge for A2A disputes, scheduled wakes with signed receipts, chain reads, signed oracles (weather/FX/randomness/onchain), attestation…

paid API data x402
$0.93 · 30d 50 tx
api.particle.pro api.particle.pro
q 100

Podcast intelligence for AI agents: transcripts and semantic search across episodes, guests and appearances, chart rankings, advertising and sponsor analytics, political-bias and brand-suitability analytics, plus companies, people and topic…

paid API data x402
$5.79 · 30d 425 tx
api.bakhour.ca api.bakhour.ca
q 100

Deterministic utility APIs paid per request with x402 on Base.

paid API data x402
$0.04 · 30d 7 tx
lab.paidapis.net lab.paidapis.net
q 100

A toolbox of x402 payment-protocol mechanics: 25 small real endpoints on Base mainnet USDC, each demonstrating a distinct pattern -- oracle attestation, escrow, auction, prediction market, deferred invoicing, subscription reminders, insured…

paid API data x402
$17.14 · 30d 104 tx
horizonpulse.dev horizonpulse.dev
q 100

Pay-per-call APIs for AI agents over x402 v2 on Base USDC (Coinbase CDP facilitator): crypto market pulse, technical signals, DeFi yields, wallet portfolio, gas and funding rates, plus web fetch-to-markdown, SSRF-safe HTTP proxy, and URL/HT…

paid API data x402
$0.42 · 30d 35 tx
api.maxwellinternational.ai api.maxwellinternational.ai
q 100

Pay-per-call JSON over x402 (USDC on Base or Solana, Coinbase CDP facilitator). Public records: SEC EDGAR (companies, filings, financials), OFAC sanctions, NVD CVEs, openFDA, FRED and ECB macro, USPTO patents, CourtListener, company registe…

paid API data x402
$19.36 · 30d 730 tx
grokzilla.shop grokzilla.shop
q 100

Humanless agent microservices marketplace. Pay-per-call USDC on Base via x402. Native skills include token count, URL normalize, JSON flatten/validate, text diff, HTML clean, keyword extract, AI detector, OSINT graph, SEO, and deep research…

paid API data x402
$0.37 · 30d 22 tx
api.mekler.ai api.mekler.ai
q 100

Pay-per-call services for agents over x402 (USDC on Base or Solana, no API key): annual SEC financial facts by CIK with filing links, CSV validation against typed column rules, citation source-overlap checks, and static web page text extrac…

paid API data x402
$0.64 · 30d 20 tx
api.wines.bet api.wines.bet
q 100

Commercial wine market data API for AI agents. Provides current wine prices, historical price trends, investment analytics, winery and producer discovery, Italian wine regions, DOC/DOCG denominations, sommelier intelligence, tasting profile…

paid API data x402
$1.07 · 30d 12 tx
relay.straelo.com relay.straelo.com
q 100

Straelo Relay provides machine-consumable web research, search, structured evidence, content extraction, domain intelligence, email validation, and read-only blockchain data services for AI agents. All paid endpoints use x402 payments on Ba…

paid API data x402
$0.39 · 30d 31 tx