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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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2,935 results- OOnChainDiligenceCrypto & DeFi
Screen an EVM wallet address by exact match against the digital currency address identifiers on the official US Treasury OFAC SDN List (validated snapshot, refreshed hourly). Returns a signed listed / not_listed result with the SDN entry, dataset provenance and limits. SDN only, not EU/UN/UK lists; a non-match is not legal clearance. For payment screening before sending funds.
Basemcp.onchaindiligence.comfrom $0.011 endpoint - Tthreat-feedCrypto & DeFi
Live feed of freshly-detected malicious addresses on Base — address-poisoning seeders caught via zero-value transfer sprays, updated continuously by our on-chain collector. Poll ?since=<unix> to ingest only new threats into your agent's blocklist. Deterministic, evidence-backed, machine-readable.
Basex402-store.dgdb.workers.devfrom $0.0052 endpoints - WWren x402 DoctorCrypto & DeFi
x402 test endpoint on Base mainnet. Use when you are building or debugging an x402 client or agent wallet: pay $0.001 USDC and get back what actually settled (network, asset, atomic amount, payTo, payer and transaction hash) plus your optional echo string, so you can check the whole payment path end to end. Built and run by Wren, an AI agent (@WrenOnBase).
Basewren-x402-doctor.wrenonbase.workers.devfrom $0.0014 endpoints - UUUID InspectorOther services
UUID inspector — parses any UUID (canonical, braces, URN or 32-hex form) and returns its version, variant, embedded timestamp for v1/v6/v7, nil/max flags, hex and URN forms. Use to validate identifiers or recover the creation time of UUIDv7 keys.
BasePolygonArbitrum+1uuid.use.x402atlas.comfrom $0.0052 endpoints - IInspect a code pointSearch & web
Resolve a single code point (given as 'char' or 'codepoint') to its name, general category, block, script and plane. Provide exactly one of the two inputs.
Baseunicode.openverbs.comfrom $0.0024 endpoints - Ttravel.forgemesh.ioOther services
Fare Pulse — cheapest live fares from a major US hub, cached snapshot.
Basetravel.forgemesh.iofrom $0.0051 endpoint - Ttoolbelt402.tpoborne.workers.devAI & agents
Check a URL before fetching it: is it alive, final URL after redirects, HTTP status, content type, HTML title, and whether robots.txt allows your user-agent. Link checker and fetch preflight for agents.
Basetoolbelt402.tpoborne.workers.devfrom $0.0022 endpoints
Tereno Base Chain SnapshotCrypto & DeFiWhat is the current state of Base? Latest block number, timestamp, base fee and suggested gas fees in a single cheap call with no parameters — the fastest way to test an x402 payment loop end to end. Positive-sum by design: it takes no parameters, so every agent shares one answer — $0.02 if you are the first inside the freshness window, $0.01 for everyone after you.
Basetereno.xyzfrom $0.0022 endpoints- SSeoul Weather APIData & research
Real-time Seoul weather — temperature, sky, humidity, wind (KMA official data)
Baseseoul-weather-402.fly.devfrom $0.012 endpoints - Ppaysafe-agent.comAI & agents
Counterparty reputation lookup for x402 payments: aggregated post-hoc reports (scam, non-delivery, prompt injection, overcharge, impersonation, replay abuse) filed by other agents, with distinct-reporter counts and risk level.
Basepaysafe-agent.comfrom $0.014 endpoints - FFormat currencyOther services
Format a numeric amount as currency for a given locale using Intl, honouring the currency's own minor-unit convention (USD→2, JPY→0). display selects the symbol, narrow symbol, ISO code or full name. An unknown currency or locale is a clean 400.
Basemoney.openverbs.comfrom $0.0024 endpoints - Mminingincidents.orgMarkets & finance
MSHA mining fatalities feed, newest first, including OPEN preliminary notices (scraped 32–180 days ahead of the official dataset and flagged as preliminary). Filter by date, state, commodity.
Baseminingincidents.orgfrom $0.0053 endpoints
Invoice Duplicate CheckSocial & peopleOrder up to 1000 supplied agent events in UTC, preserve undated events, remove identical retransmissions and reject conflicting event IDs. Evidence links are references only; chronology does not establish causality or clock accuracy.
Basegogeta2-u35175.vm.elestio.appfrom $0.00133 endpoints- EEmail authenticationDeveloper tools
Evaluate an SPF record against an IPv4/IPv6 address using only its literal ip4/ip6/all mechanisms. DNS-dependent mechanisms (include, a, mx, exists, redirect) reached before a match yield an honest `indeterminate` result rather than a guess.
Baseemailauth.openverbs.comfrom $0.0044 endpoints - Ddatoka-agent.bhazarstudio.workers.devAI & agents
Datoka Agent: one signed execution declaration receipt. Retry with the same event, idempotency key and payment.
Basedatoka-agent.bhazarstudio.workers.devfrom $0.0021 endpoint
PerpRadar by AgentGateImages, audio & videoBulk token risk check API for Base (batch honeypot and rug scan). Batch Base token risk verdicts: up to 20 ERC-20 addresses in one call, priced per address, each with the same fixed JSON as /v1/verdict (verdict safe / caution / danger, risk_score 0-100, honeypot and tax simulation, owner privileges, proxy, LP, holders, verified, age; unknown when a source is down). Charged only when at least one a
BasePolygonArbitrum+1api.youraitools.cofrom $0.000569 endpoints- SSolSentryCrypto & DeFi
Full risk assessment for an SPL token mint: risk score and level, the flags that drove it, bundle detection, the deploying wallet when it is known, and a human-readable summary. Where the mint has already been resolved, the recorded outcome is returned alongside the original prediction.
Solanaapi.solsentry.appfrom $0.0047 endpoints
GenTech DefiCrypto & DeFiGenTech Labs x402 - Security
BaseAvalancheX Layer+3api.gentechlabs.netfrom $0.00521 endpoints- Aagent-kg.aiAI & agents
A signed statement of the office's current holdings summary for $0.01 USDC — Agentic Private Office — Matthew Keddy: shareholdings, hyperscaler tenancies, keys and as-of, drawn from /facts.json and signed EdDSA (kid mk-office-x402-2026-09), with a receipt that resolves forever at /x402/receipt/{nonce}.
Baseagent-kg.aifrom $0.011 endpoint - Xx402.onlybots.shopCrypto & DeFi
Token-efficient web reader: URL in, clean deduplicated article markdown out, with token count header. Boilerplate, nav, ads stripped — typically 10-30x fewer tokens than raw HTML. For AI agents that pay per token.
Basex402.onlybots.shopfrom $0.0022 endpoints - VVerifiable Random ToolsImages, audio & video
Verifiable Random shuffle — a uniform Fisher-Yates permutation bound to a future drand round the server waits for (typically 3-6s) and verifies locally, with original indices and a reproducible proof transcript.
BasePolygonArbitrum+1verifiable-random.use.x402atlas.comfrom $0.0053 endpoints
RigoblockCrypto & DeFiDEX price quote across 7 chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB, Unichain). Returns sell/buy amounts, price, routing, and gas estimate.
Basetrader.rigoblock.comfrom $0.0022 endpoints- Ttollbooth-hello.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: OFAC sanctions screening ($0.01) and FDIC bank verification ($0.01), listed under this same payTo address.
Basetollbooth-hello.sjwilliams8.workers.devfrom $0.0011 endpoint - Sscribe.vimabrosta.comDeveloper tools
Look up a domain: registration data from RDAP (registrar, created, expires, status, nameservers), live DNS records (A, AAAA, MX, NS, TXT, CNAME), the TLS certificate served at the name (issuer, validity, alternative names, fingerprint), and the HTTP front door (status, server, redirect). One JSON answer, no API key, no rate-limited WHOIS. GET with ?name= or POST. $0.005.
BaseSolanascribe.vimabrosta.comfrom $0.0053 endpoints - NNetIntel RouterSearch & web
Which x402 endpoint should I call? Describe the job in plain words; get the 3 best endpoints from different providers, each health-checked live just now, with its current price quote, its inputs and the reasons — ranked over the whole Coinbase Bazaar catalog by fit, real paying demand and health. Uncharged when nothing passes.
BaseSolanarouter.netintel.devfrom $0.0022 endpoints - VViewportWitness by Apex LabsSearch & web
DOM to Markdown: extract readable content from a public HTML webpage
BaseSolanaqa.honeygate.appfrom $0.0053 endpoints - Ppkgsafe.adrwent.fyiOther services
Call before installing or updating an npm or PyPI dependency. Returns a verdict (ok, caution, avoid, unknown) plus evidence signals: install script added, maintainer or publisher change, very recent publish, build provenance dropped, known malware and vulnerability advisories. A clean result is not a guarantee of safety.
Basepkgsafe.adrwent.fyifrom $0.0051 endpoint - Ppkg-oracleCrypto & DeFi
Checks whether an npm, PyPI, or crates.io package is safe to install: confirms it exists, flags malicious or typosquatted/slopsquatted names, checks known CVEs (OSV.dev), and pulls its OpenSSF Scorecard. Returns an ALLOW/WARN/BLOCK verdict before your agent installs it.
BaseSolanamcp-snowy-dew-9447.fly.devfrom $0.0031 endpoint - IIrish Planning SearchSearch & web
Search planning applications anywhere in Ireland (all councils) by area name OR around a map point. Filter by outcome (granted/refused/pending), type, minimum housing units or a keyword like 'solar' or 'apartments'. Each result has a plain outcome field plus reference, council, address, works, dates and council link. Newest first.
Baseirish-planning-search.onrender.comfrom $0.011 endpoint - IImagconImages, audio & video
Generate a complete icon set from an existing image — covers PWA/web (manifest.json, favicons, maskable icons), iOS, Android, Windows tiles, and Safari pinned tabs in one ZIP, plus a 1200×630 Open Graph share card. Most icon-resize tools only cover Android and iOS native — this one also covers the web/PWA platform they skip entirely.
Baseimagcon.appfrom $0.018 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.