A2A earnings → wallet ranking, coverage and attribution
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.
Why this order?
toolrail.dev
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.
api.queryspigot.com
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.
api.signalis.dev
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…
api.vindexapi.dev
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 …
api.orcatrace.dev
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…
x402.openwebninja.com
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.
pay.snowsignals.io
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 …
taskfleet.net
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),…
api.freestylevault.com
Human-reviewed IFTA quarterly tax rates, jurisdiction registry, footnotes, and USD/CAD exchange for trucking fleets and agents. USDC on Base via x402.
api.paysponge.com
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.
rentcast.x402.paysponge.com
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…
x402.orthogonal.com
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.
api.zerion.io
Wallet, DeFi portfolio, and on-chain data API. Pay-per-request x402 on Base and Solana with no API key.
scout.hugen.tokyo
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 …
econdash.org
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…
x402.agentfund.net
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, …
api.apify.com
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.
api.xynaptic.io
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 (…
stablesocial.dev
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)…
hirescrape.com
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.
spotify.jojapi.net
Spotify Data API for Millions of songs & podcasts, artists, albums, playlists and more.
hmo.payapi.market
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.
api.querylines.com
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…
ticks.bnm.farm
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…
api.x402node.dev
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.
intel.rallylive.ca
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.
soren.com
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…
api.particle.pro
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…
api.bakhour.ca
Deterministic utility APIs paid per request with x402 on Base.
lab.paidapis.net
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…
horizonpulse.dev
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…
api.maxwellinternational.ai
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…
grokzilla.shop
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…
api.mekler.ai
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…
api.wines.bet
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…
relay.straelo.com
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…