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Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.
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54 results- SSMX Space Markets Stage 1Crypto & DeFi
Read SMX (Space Markets Stage 1) testnet event markets on space milestones, e.g. Starship Flight 14 and The Moon Race, on Base Sepolia (eip155:84532): list markets, market detail, or mid price in cents. Each read costs $0.01 test USDC via x402. Test collateral has no monetary value. This API does not place orders: trading is wallet-signed from your own wallet per https://smx.space/skill.md. Docs:
Base Sepoliasmx.spacefrom $0.0138 endpoints - UUSDC yieldSocial & people
USDC yield, best lending rates now ($0.002): supply and borrow APY of USDC on every Aave v3, Spark and Compound v3 market (Ethereum, Base, Arbitrum, Optimism, Polygon), utilization and size, highest APY first, read on chain every 10 minutes. Use to park idle USDC.
BasePolygonArbitrum+3api.marketintelligenceapi.comfrom $0.001104 endpoints - Aapi.x402.fernhub.co.nzOther services
Live NZ road events (closures, delays, roadworks) along a driving route or around a named road, pass or place, with plain-English location, delay minutes, map links, route distance, drive time and a Google Maps directions link. Understands landmarks and passes (Desert Road, Arthur's Pass, Milford Road), 'A to B', 'A via X to B'. Free /resolve shows how your input is read before you pay.
Base Sepoliaapi.x402.fernhub.co.nzfrom $0.0055 endpoints - CCrypto Wallet Sanctions (OFAC)Crypto & DeFi
Crypto wallet sanctions check (OFAC): is this blockchain address on the US Treasury OFAC sanctions lists? Exact match against all 1,000+ digital currency addresses OFAC publishes on SDN and Consolidated entries (Bitcoin, Tron, Ethereum and EVM chains, USDT, Litecoin, Monero and more), returning the listing's program and entry ID. Use before sending or accepting a crypto payment. No tracing or risk
BasexrplBase Sepolia+1api.stablecoingateways.comfrom $0.00114 endpoints - FForeverKaratDeveloper tools
One-day API key for a weather data API. A test product on the Agentify test channel; nothing real is delivered.
Base Sepoliatest.agentify.adfrom $0.0116 endpoints
Omni TerminalCrypto & DeFiOmni Terminal delivers fresh, deduplicated market-moving news and catalyst context across equities, crypto, macro, and forex for AI trading agents.
Base SepoliaBaseomniterminal.appfrom $0.00113 endpoints
NythosX Market DataCrypto & DeFiSignal bias with setup levels and invalidation. Rules-based bias (bullish/lean_bullish/neutral/lean_bearish/bearish) with score, confidence, setup, weighted factors, invalidation. tf sets candle size and lookback (5m=1H to 1w=1Y): shorter is faster but noisier, longer is slower but higher-conviction. Accuracy free at /api/v1/track-record. Quick direction + one setup; get_trade_plan ($0.03) adds ta
Base SepoliaBasemarket.nythosx.comfrom $0.0056 endpoints- Aapi.run402.comOther services
Set prototype tier ($0.10 USDC) — auto-detects start/renew/upgrade
Base SepoliaBaseapi.run402.comfrom $0.012 endpoints - Ssandbox.node4all.comDeveloper tools
Node4All Fortune — deterministic fortune reading derived from the x402 payment authorization nonce. Flagship demo of the Node4All x402 v2 payment flow. Operator: Node4All (https://node4all.com). Currency: USDC on Base.
Base Sepoliasandbox.node4all.comfrom $0.0021 endpoint - Xx240.jvnclk88.workers.devCrypto & DeFi
URL preflight - status, redirect chain, key headers, response time, robots.txt rules for the path and sitemap location
BaseBase Sepoliax240.jvnclk88.workers.devfrom $0.00216 endpoints
AI Score paid scanAI & agentsPOST /api/scan — agent-readiness scan for a domain (~$0.01 USDC per call)
BaseBase Sepoliagetbags.appfrom $0.014 endpoints- WWallets Demo WeatherCrypto & DeFi
Real-time current weather conditions for a city or location, including temperature, humidity, precipitation, wind, and a human-readable condition.
Base Sepoliawallets-demo-seller-server.calebgcarithers.workers.devfrom $0.0011 endpoint - Hheb-utils-x402.hebutils-api.workers.devCrypto & DeFi
Look up the latest Base mainnet block returned by the upstream RPC, including its number, timestamp (Unix and ISO) and gas used. No parameters. An upstream block response does not independently establish chain liveness or data freshness.
BaseBase Sepoliaheb-utils-x402.hebutils-api.workers.devfrom $0.00116 endpoints - Aagent-tools-7936.onrender.comAI & agents
Use before paying any x402 endpoint, so you don't pay a dead or mispriced one: checks it is alive, correctly payment-gated, its price/network/asset, latency, and whether it fits your max_price_usd. Sends one unpaid request, never pays. ~9% of paid listings we scanned were dead. Errors (never charged): 400 bad input, 422 source could not be fetched or parsed, 429 rate limited (30/min), 502 upstream
BaseBase Sepoliaagent-tools-7936.onrender.comfrom $0.0018 endpoints - Xx402-pricegap-poc.vercel.appOther services
Live sports scores: get today's scores, game status and final results for NFL, NBA, MLB, NHL and soccer matches by league and date. Test endpoint.
BaseBase Sepoliax402-pricegap-poc.vercel.appfrom $0.015 endpoints - Xx402-test.genesisblock.aiAI & agents
GenesisBlock: Current weather conditions for major global cities.
Base Sepoliax402-test.genesisblock.aifrom $0.0017 endpoints - VVatic prediction dataCrypto & DeFi
Live, exact crowd probabilities of up to 100 open Vatic prediction markets (football, fights, politics, finance, crypto and more).
Base Sepoliavaticmarkets.iofrom $0.0027 endpoints - Xx402 CheckupOther services
Checkup for x402 buyer clients. Pay once and get a field-by-field diagnosis of the payment your client signed (amount, recipient, validity window, clock offset, nonce, EIP-712 signature) and of the request that arrived, plus the facilitator's verify and settle results. Base mainnet payments get the full diagnosis; Base Sepolia payments get a preview with the status of each check only.
BaseBase Sepoliacheckup.kagurazaka.devfrom $0.0051 endpoint - UUK Fuel Prices (testnet)Data & research
UK fuel prices per forecourt for one postcode district. Query parameter: postcode (e.g. SW1A1AA or SW1A). Returns JSON: stations, price per fuel type (E10, B7...), timestamps. Source: GOV.UK Fuel Finder. Contains public sector information licensed under the Open Government Licence v3.0. Independent; not an official government service, not endorsed by GOV.UK. Prices as published, expected pence per
Base Sepoliaapi.ukfuelprice.workers.devfrom $0.011 endpoint - PProtocol Radar - Aaron ZhangCrypto & DeFi
Status of every Ethereum Improvement Proposal as JSON: number, title, status (living, final, last-call, review, draft, stagnant, withdrawn) and link, plus counts by status. Parsed live from eips.ethereum.org (EIPs are CC0).
BaseBase Sepoliaaaron-protocol-radar.vercel.appfrom $0.014 endpoints - PPreIPO Feed by Aaron ZhangCrypto & DeFi
Anthropic pre-IPO fundamentals as JSON: FY2025 revenue and May 2026 run-rate revenue, operating expenses, operating and net loss, compute and infrastructure spend, compute obligations, cash and short-term investments, top-customer revenue share, compute cost per revenue dollar. Each number has its own source URL, verification grade and value type (approx, lower bound, exact, derived).
BaseBase Sepoliapreipo-feed.vercel.appfrom $0.017 endpoints - EEvidence402AI & agents
Read a public static HTTPS webpage as clean text with headings, links, timestamp and content hash. Use to ground an answer or ingest documentation. Respects robots.txt; no JavaScript or login.
Base SepoliaBaseevidence402.onrender.comfrom $0.0057 endpoints - Ttollbooth-hello-testnet.sjwilliams8.workers.devAI & agents
Test endpoint for verifying x402 payment integration end to end. Returns a static greeting in the Agent Tollbooth standard response envelope. Not a data product — use it to smoke-test your x402 client for $0.001 before calling our compliance endpoints.
Base Sepoliatollbooth-hello-testnet.sjwilliams8.workers.devfrom $0.0011 endpoint - BBitcoin Tech Radar - Aaron ZhangDeveloper tools
Status of every Bitcoin Improvement Proposal as JSON: number, layer (consensus soft fork, peer services, applications), title, type and status (Draft, Complete, Deployed, Closed...), with links. Parsed live from the bitcoin/bips repository index, plus counts by status.
BaseBase Sepoliabtc-radar.vercel.appfrom $0.013 endpoints - Sshelf-production-43b5.up.railway.appCrypto & DeFi
Current block height for Base Sepolia. Returns the latest block number as an integer, read from the chain at request time.
Base Sepoliashelf-production-43b5.up.railway.appfrom $0.0011 endpoint
BAGS Agent APIAI & agentsBAGS Agent API index — machine-readable directory of the agentic payment API, MCP server, and x402 payment surface.
BaseBase Sepoliastaging.getbags.appfrom $0.011 endpoint- PPulseScannerCrypto & DeFi
One block's fee recipient, gas use and burnt fees, with its consensus reward. PulseChain (chain id 369). $0.003 USDC per call.
Base Sepoliax402-staging.pulsescanner.iofrom $0.0035 endpoints - IISHOBData & research
Normalized scholarly metadata + abstract + full rights/attribution for one open-licensed document
Base Sepoliaai-data-archive.health-womens01.workers.devfrom $0.0013 endpoints - Ttestnet-x402-api.karpak.xyzSearch & web
Search parking lots worldwide by name, place, setting, facility, amenity and status, or find the nearest to a point: a page of up to 100 lots with live free spaces, hourly prices in USD and distances, and per-country totals; sorted and nearby results come in one page
Base Sepoliatestnet-x402-api.karpak.xyzfrom $0.0014 endpoints - VVerify tx receipt for payoutOther services
Verify a Base/BSC transaction receipt for a payout or claim: status, block, sender, gas, decoded ERC-20 Transfer logs and a sha256 evidence digest. 0.01 USDC via x402 on Base. POST only. Free sample: /samples
BaseBase Sepoliacairnworks-verify.run402.comfrom $0.011 endpoint
Service data comes from the Coinbase CDP and PayAI discovery lists and refreshes every few hours. Usage is paid calls over the last 30 days. APIs launched here are verified by us; the rest are paid directly to their owners.