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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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4,150 results
SkyCastData & researchCurrent weather for a city or lat/lon: temperature, humidity, wind, conditions.
Baseskycast.clawca.shfrom $0.0012 endpoints- Oonchain-health.mick8511.workers.devSocial & people
Checks whether a signature was made by a claimed EVM address: EIP-191 personal_sign messages, EIP-712 typed data or a raw 32-byte digest, verified by ecrecover for wallets or ERC-1271 isValidSignature for smart-contract wallets (Safe, Coinbase Smart Wallet) on Ethereum, Base, Arbitrum, Optimism or Polygon. Returns validity, method, recovered signer and digest. Free sample: https://onchain-health.m
Baseonchain-health.mick8511.workers.devfrom $0.0025 endpoints - Llab.paidapis.netData & research
Freshness-tiered pricing: gas price + ETH/USD price, same data either way. ?freshness=cached ($0.002) serves the last known values with no network call; ?freshness=live ($0.02) forces a guaranteed-current fetch right now.
Baselab.paidapis.netfrom $0.0025 endpoints - Ggeld machen image-ocrImages, audio & video
JSON micro-tool for agents: GET ?url= (or POST url / image_base64) → local Tesseract OCR (English-first): text, word_count, confidence, width/height, fetched_at, timing_ms. COGS=0 — no upstream OCR API key. Demand-matched OCR class (competitors ~$0.005–$0.012). Brand: geld machen. x402 $0.01 Base USDC.
Basegeld-machen-x402.fly.devfrom $0.014 endpoints - Xx402checkCrypto & DeFi
Live x402 conformance pre-flight check: pass ?url=<x402 endpoint>, get a structured PASS/WARN/FAIL verdict on its 402 challenge before you trust it with a real payment.
Basex402check.arden-instance.workers.devfrom $0.0022 endpoints - Vvu.velvetdao.xyzCrypto & DeFi
Ask anything about crypto: real-time crypto insights, token analytics, trend detection and market intelligence.
Basevu.velvetdao.xyzfrom $0.015 endpoints - SSingapore ACRA Company RegistrySearch & web
Search Singapore MOE schools by name or postal code (optional level filter). Results include the school directory joined with subjects offered, CCAs, MOE programmes and distinctive programmes.
Basedata.finery.ccfrom $0.0052 endpoints - Ssrv1553682.hstgr.cloudCrypto & DeFi
Crypto Fear & Greed index: current value and classification plus 7-day history. Always-on, self-healing, verified onchain settlement. Source: Alternative.me.
Basesrv1553682.hstgr.cloudfrom $0.00163 endpoints - Ddata.japanagent.devSearch & web
Company name search across jurisdictions. jurisdiction=lei searches the global GLEIF LEI database (all countries); jurisdiction=jp searches the official Japan National Tax Agency corporate registry. Returns registered legal names, identifiers, and addresses. KYB / counterparty verification primitive.
Basedata.japanagent.devfrom $0.0023 endpoints - IIP Geolocation LookupData & research
Resolve any public IPv4/IPv6 address (or hostname) to geolocation for analytics, fraud, and ops agents. Returns ISO country code, region, city, IANA timezone, latitude/longitude, EU membership flag, and the matched network range. Backed by an embedded MaxMind GeoLite2 dataset (no external API calls). Private and reserved IP ranges are rejected; no shell access.
Basegeoip.bip-rep.comfrom $0.0051 endpoint - SSYNTHORACrypto & DeFi
Filter DefiLlama yield pools using red, activo or protocolo; optional pool_id requests bounded history. Returns up to 15 selected pools, APY/TVL fields, coverage and source-specific capture metadata. Class-based outlier and divergence rules are descriptive, with match gaps disclosed. Snapshot timing, pool comparability and investment outcomes are not independently established.
Baseapi.hergertsynthora.comfrom $0.019 endpoints
Zeus Visuals Immersive KBImages, audio & videoGetting audio out of an AIVU when FFmpeg says "no decoder found for apple_apac". Apple Immersive (AIVU) audio is APAC, which FFmpeg can't decode or copy into MP4, and Apple's automatic stereo mix silently returns silence. The working fix is to decode APAC natively to PCM with AVFoundation, then encode with FFmpeg. Exact errors, settings, and gotchas.
BaseSolanazeuskb.comfrom $0.106 endpoints- Llumierepaycheck.orgAI & agents
Score up to 100 x402 endpoints in one call. For teams: per-agent spend limits and an audit trail at lumierepaycheck.org/subscribe.
BaseSolanalumierepaycheck.orgfrom $0.0057 endpoints - Ddwelldata.ioDeveloper tools
Entry tier of the multifamily deals feed: every active listing at card level — address, price, units, advertised cap rate, listing URL, freshness — without the computed underwriting or scoring. Same coverage, cheapest way to evaluate the feed. Same query filters as the full feed. Every field typed; a query that matches nothing returns free — you never pay for a blank.
Basedwelldata.iofrom $0.014 endpoints - Bbunnvault.xyzOther services
BunnVault: Real-time Aave v3 USDC APY feed on Base Mainnet
Basebunnvault.xyzfrom $0.0051 endpoint - Wwebtools.genexxis.comAI & agents
Detects the technologies of a website homepage (CMS, e-commerce, frameworks, web server, CDN/hosting, analytics, tag managers, ad pixels, payments, chat, consent, security headers, fonts) with category, version when visible, evidence and confidence.
Basewebtools.genexxis.comfrom $0.014 endpoints - Ssanctions.genexxis.comCrypto & DeFi
Check a crypto address (BTC, ETH/EVM, TRON, USDT, XMR, LTC...) for an exact match with OFAC SDN digital currency addresses; returns the designated entity, currency and programs.
Basesanctions.genexxis.comfrom $0.0053 endpoints - UURL & Text ToolsDeveloper tools
Percent-encode or decode text as URL component, path, query or form data (UTF-8), with byte counts.
BaseSolanaPolygon+1url-text-tools.x402tookit.comfrom $0.028 endpoints - Sstreamsage.newsSearch & web
No description yet.
Basestreamsage.newsfrom $0.011 endpoint - GGEDX402 SearchSearch & web
Tavily web search — POST { query, max_results?: 5 } on search.gedx402.com; ranked results via Tavily API. $0.042 USDC per request. AM-winning shape at /v1/search. Agent search: tavily, web search, serp, search lite, semantic search.
BasePolygonArbitrum+2search.gedx402.comfrom $0.016 endpoints
blackhullAI & agentsblackhull route: best-rated ai-analysis providers, 2026-10-30. Measured by Blackhull from public data; every finding carries its evidence and can be disputed free at /dispute. Try it free: add ?sample=1.
Baseblackhullsystems.comfrom $0.0036 endpoints
Lorg CheckCrypto & DeFiIs this address safe to pay? Sanctions lists, scam labels, EIP-7702 sweeper wallets, address-poisoning look-alikes and where the wallet's first funds came from. A signed allow, caution or block, an action and the reasons.
Baseapi.lorglabs.comfrom $0.012 endpoints- TTxGuardCrypto & DeFi
Explain and preflight an unsigned Base transaction, EIP-712 typed data, or an EIP-3009 x402 payment authorization before you sign it. Decodes intent against verified ABIs, resolves proxies, classifies approvals, and checks a payment authorization against the quote it claims to pay: recipient, amount, asset, chain, freshness, and nonce replay. Returns unknown rather than guessing when a selector is
Basetxguard.schemasure.comfrom $0.021 endpoint - Tthe-stall.intuitek.aiImages, audio & video
Earnings calendar for upcoming US stock reports — earnings date, EPS estimate, pre/post-market timing. Filter by ticker for per-company lookups, or scan a date window (1–90 days ahead) for calendar-driven research automation. Data: Alpha Vantage 3-month calendar, cached 2 hr.
Basethe-stall.intuitek.aifrom $0.043 endpoints - Bbanking-compliance-production.up.railway.appSearch & web
Search the federal banking compliance rules database. 56 rules across Reg DD, Reg Z, UDAAP, ECOA, BSA/AML, and more.
Basebanking-compliance-production.up.railway.appfrom $0.0031 endpoint - Pproxy.0000402.xyzOther services
Pay $0.01 USDC to make an outbound HTTP request through the proxy. Supports all standard HTTP methods, custom headers (including auth), and JSON or raw bodies. Responses are returned as text or base64-encoded binary. Max response size 10 MB, timeout 30s. Each request performs one upstream fetch and returns the final URL plus response metadata.
Baseproxy.0000402.xyzfrom $0.011 endpoint - Oonedollaraudit.comOther services
Smart Contract Audit — Security review of a single contract
Baseonedollaraudit.comfrom $1.001 endpoint - UUS Regulations PipelineSearch & web
US federal regulations in the pipeline — documents on public inspection at the Federal Register, filed by agencies and scheduled to publish, with type, agencies, filing time and the scheduled date. Use to see tomorrow's rules, notices and executive orders before they are published.
BasePolygonArbitrum+1us-regulations.use.x402atlas.comfrom $0.0055 endpoints - Nnojunk-moderate.mick8511.workers.devOther services
Text Moderation language: Language identification (ISO 639-1 code, name, confidence) for one text or a batch of up to 50, with a script-based fallback.
Basenojunk-moderate.mick8511.workers.devfrom $0.0015 endpoints - DDF Market IntelligenceMarkets & finance
Upcoming US economic data releases (CPI, jobs report, GDP, etc.) for the next N days. Use this to know when market-moving data comes out.
Basedf-data-agent.vercel.appfrom $0.00510 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.