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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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682 results- LLION Verified CompanySocial & people
Is this crypto wallet sanctioned? Instant OFAC SDN address screen for AI agents. Returns PASS/WARN/BLOCK. $0.001 Base USDC, keyless x402. Ed25519-attested. Upsell: full counterparty bundle $0.05.
Baselion-x402-bible.lionmaster-operations.workers.devfrom $0.0014 endpoints
defi.genexxis.comCrypto & DeFiDeFi TVL from DefiLlama: top protocols filtered by category and chain (TVL, 1d/7d change, market cap, chains), chain TVL rankings with protocol counts, or one protocol with per-chain TVL split and 90 days of daily TVL history.
Basedefi.genexxis.comfrom $0.0034 endpoints- SSpace ObjectsOther services
Asteroids and comets passing Earth within a lunar-distance limit in the next or last N days: distance, speed, size range.
BaseSolanaPolygon+1space-objects.x402tookit.comfrom $0.0210 endpoints - DDokimo Verify APICrypto & DeFi
Dokimo Verify API (GET) - scheme demo: recomputes a sample dokimo-merkle-v1 proof to its root and verifies nothing of yours. For real caller verification, POST /paid/verify with {leaf, proof_path, root, rule_version_commitment} plus summary and binding for a dokimo-anchor-v2 close (recompute + on-chain anchor check). Scheme: /merkle-spec.html.
Basedokimo.augaster.comfrom $0.011 endpoint - WwickedapiData & research
Demo weather - current conditions for New York City
Basepaywall.wickedapi.comfrom $0.011 endpoint - Xx402 PreflightCrypto & DeFi
Check an x402 seller before you pay it. Probes the endpoint now, checks that its payment can actually succeed (token EIP-712 domain, payTo), and adds its 30-day uptime from our monitor of paid Bazaar listings, how many distinct buyers paid it, and how its price compares with similar listings, with cheaper well-used alternatives. Returns a verdict (ok, caution, avoid) with the reasons.
Basepreflight.kagurazaka.devfrom $0.0021 endpoint - TText SimilarityCrypto & DeFi
Cosine similarity of the word-count vectors of two texts, with shared terms and vector norms.
BaseSolanaPolygon+1text-similarity.x402tookit.comfrom $0.0210 endpoints - Sstat.halowerk.comData & research
Reports the credit-to-GDP gap for a country, which is the deviation of the credit ratio from its long-run trend and the quantity the Basel framework uses to trigger the countercyclical capital buffer. The thresholds applied are the regulatory ones — the buffer starts to build at a gap of two percentage points and is at maximum by ten — and they are returned with the result, because a phase judgeme
Basestat.halowerk.comfrom $0.00159 endpoints - CContextSlimAI & agents
[MCP: fetch_result] Targeted JSONPath extraction (query param mode) from cached context reference.
Basecontextslim.friczero.comfrom $0.0012 endpoints - Aanomaly.forgemesh.ioCrypto & DeFi
Returns a real-time mempool anomaly score with current gas price vs 20-block median, pending whale swaps, and contract deploy counts. Poll every 5s to monitor mempool for MEV or sandwich attacks and catch gas spikes or large pending swaps as they happen, before they land on-chain.
Baseanomaly.forgemesh.iofrom $0.014 endpoints - AAIS FleetData & research
Get the vessels currently in a UN/LOCODE port as JSON: MMSI, name and arrival time of every vessel the AIS Fleet network observes there now, with a total count.
Baseaisfleet.comfrom $0.0113 endpoints
x402 DoctorAI & agentsShould my agent pay this expensive x402 endpoint? Call it before a costly or repeated payment. Returns the go / caution / no_go verdict plus the full diagnosis, the endpoint's check history per day over 30 days, how reliable the seller's other endpoints are and whether the endpoint moved domains. Never pays the endpoint. Bulk: 1000 credits for $0.80 via /api/v1/credits.
SolanaBasexrpl+4x402-doctor.fizzl.eufrom $0.0016 endpoints- BBitcoin NetworkDeveloper tools
Bitcoin network health: tip height, block pace vs 10 minutes, difficulty retarget forecast, hashrate trend and Lightning size.
BaseSolanaPolygon+1bitcoin-network.x402tookit.comfrom $0.028 endpoints - BBicycle Gearing & Fit CalcCrypto & DeFi
Cadence needed to hold a target speed in a given gear, and the chainring-to-cog ratio needed for a speed at a cadence.
BaseSolanaPolygon+1bike-calc.x402tookit.comfrom $0.028 endpoints - CCrypto Perp Funding & SentimentCrypto & DeFi
Supported perpetual-futures trading pairs — the list of symbols (BTCUSDT, ETHUSDT, …) the funding-rate scanner and signals cover, as a clean snake_case envelope.
BasePolygonArbitrum+1perpsignals.use.x402atlas.comfrom $0.0053 endpoints - Xx402stock.vercel.appMarkets & finance
Full-text search across every SEC EDGAR filing since 2001. Find filings mentioning a keyword or exact phrase via ?q=, narrow by ?forms=10-K,8-K, ?ticker=, and ?startdt=/?enddt= dates, and cap with ?limit=. Returns each match's form, filer, date, and a link to the document. Sourced from SEC EDGAR. From x402stock, a market & economic data API (x402, USDC).
Basex402stock.vercel.appfrom $0.015 endpoints - Ccryptodataapi.comCrypto & DeFi
Dated crypto catalysts (unlocks, mints, listings, macro) with a long/short bias and 0-1 magnitude each.
Basecryptodataapi.comfrom $0.0087 endpoints - Ssec-filings.mick8511.workers.devSocial & people
SEC company lookup: resolve a stock ticker, CIK number or company name to the SEC registrant profile with CIK, legal name, tickers, exchanges, SIC industry code and description, state of incorporation, business address, fiscal year end, filer category and former names, from SEC EDGAR. Free sample: https://sec-filings.mick8511.workers.dev/sample
Basesec-filings.mick8511.workers.devfrom $0.0025 endpoints - LLand Survey ScreeningOther services
Great-circle distance (miles, km, feet, nautical miles) and initial compass bearing between two latitude/longitude points.
BaseSolanaPolygon+1land-survey.x402tookit.comfrom $0.028 endpoints - GGrades & Study CalcOther services
Score needed on a final exam (or any remaining work) to reach a target class grade, from current grade and its weight.
BaseSolanaPolygon+1grades-calc.x402tookit.comfrom $0.028 endpoints - AApiToll Base Gas OracleAI & agents
Base gas oracle / gas price API for AI agents and bots — get the gas price for a transaction on Base in one x402 call. Real-time slow/standard/fast EIP-1559 fee tiers from a live eth_feeHistory call, returned as DROP-IN maxFeePerGas + maxPriorityFeePerGas in wei — plug straight into a viem/ethers transaction, no gwei conversion. Plus base fee, head block, and network fullness. Call it before every
Basegas.apitoll.cloudfrom $0.0011 endpoint - SSpecies and BiodiversitySearch & web
Parse a scientific name into genus, species epithet, subspecies or variety, authorship and year, and check capitalisation.
BaseSolanaPolygon+1biodiversity.x402tookit.comfrom $0.028 endpoints - UUK Company LookupSocial & people
UK company profile from the Companies House public register, returned as JSON.
Basepennydatahq.comfrom $0.0019 endpoints - CChronoSureOther services
Resolve a local time to an exact UTC instant with explicit DST ambiguity handling, business-day arithmetic, public-holiday status, and working-hour overlap across timezones. Detects ambiguous and nonexistent local times instead of silently shifting them. Declares its IANA tzdb release and per-jurisdiction holiday provenance.
Basechrono.schemasure.comfrom $0.021 endpoint - Vvitrineretirement.caData & research
One Canadian retirement residence's record from the Vitrine Retirement Index: Vitrine's score, band and rank, counts and dates of regulator records, and links.
Basevitrineretirement.cafrom $0.101 endpoint - SShipping & Logistics CalcOther services
How many identical boxes fit inside a larger box or crate: best of six orientations in a simple grid, with utilization.
BaseSolanaPolygon+1shipping-calc.x402tookit.comfrom $0.028 endpoints
ProblocksOther servicesVerify payment connectivity with USDC on Base. Returns a JSON pong and UTC timestamp after settlement.
Basex402.problocks.iofrom $0.0011 endpoint- DDataForAgentsSearch & web
DataForAgents — Steam catalog search for agents (name, genre, price filters)
Basedataforagents.netfrom $0.013 endpoints - 889-116-220-218.sslip.ioCrypto & DeFi
Base mainnet head: latest block number, block age in seconds, base fee and gas price in gwei. Use it to check the chain is advancing and to estimate fees before sending a transaction. One small JSON read instead of several raw RPC calls and unit conversions.
Base89-116-220-218.sslip.iofrom $0.0016 endpoints
Geo402Search & webGeo web fetch for AI agents. Fetch any public web page from a residential IP in a chosen country (190+ countries, optional city or US state) as clean markdown, text or HTML, with the product price/currency/availability extracted automatically when the page has product data. $0.005 per page, only charged when the page loads. Respects robots.txt; no CAPTCHA solving; sign-in, payment and email servic
Basegeo402.comfrom $0.0043 endpoints
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.