Explore APIs
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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- 4.4K
- Paid endpoints
- 93K
- Paid calls · 30 days
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4,372 results- SSports PredictorOther services
Calibrated 1X2 probabilities plus derived markets (totals, BTTS, correct score) for every upcoming fixture across the big-five European leagues. Backed by a public, Brier-scored track record.
Basesports-predictor-api.fly.devfrom $0.021 endpoint - Pprospect-intelligence.prospectintel.workers.devSocial & people
Basic company lookup. Give a company name and/or domain. Returns summary plus firmographics: industry, HQ city/country, founded year, employee count and size range, stock ticker, LinkedIn and X links. Each field cites its source (Wikidata, Wikipedia, company site, SEC EDGAR) with checked_at; unknown fields are null, never guessed. $0.10 USDC.
Baseprospect-intelligence.prospectintel.workers.devfrom $0.084 endpoints - EEVM State BatchCrypto & DeFi
Read-only EVM state API for wallet snapshots, ERC-20 balances, token allowances, contract code, block heights, and bounded eth_call reads across Ethereum, Base, Arbitrum, Optimism, and Polygon. Fixed price: $0.05 USDC on Base for a batch of up to 25 checks. Only submitted checks run. Results are provider-reported RPC data, not cryptographic proofs.
Baseevmstate.comfrom $0.053 endpoints - Aapi.satledger.orgDeveloper tools
One RFC 3161 timestamp receipt over a digest you supply. No account and no API key: the response is the whole deliverable. Your data is never sent - only its hash - and nothing about the request is retained here.
Baseapi.satledger.orgfrom $0.052 endpoints - Lllm-toll-production.up.railway.appAI & agents
AI chat completion. Body: {"messages":[{"role":"user","content":"Hello"}]}. Returns AI reply.
Basellm-toll-production.up.railway.appfrom $0.012 endpoints - Aapi.blockchain.co.baCrypto & DeFi
Translate up to 5,000 characters between Bosnian, Croatian, Serbian, English and German.
Baseapi.blockchain.co.bafrom $0.0022 endpoints - RRandom Joke APIOther services
Get a random interesting joke. Secured with x402 payment protocol on Base mainnet.
Basejokes-endpoint.vercel.appfrom $0.0021 endpoint - CCF Enforcement CheckData & research
Any federal enforcement action, court record or filing against this company? Verdict, match count, the names matched on, agencies, latest date, 90-day and 12-month counts. Signals from public records, not a compliance screen.
Baseenforcement.cfsoft.usfrom $0.052 endpoints - LLife AdviceOther services
Get one piece of thoughtful life advice, paid per request over x402.
Basex402lifeadvice.vercel.appfrom $0.0011 endpoint - Vverity.basechainlabs.comCrypto & DeFi
Fact-checking with persistent memory — VERITY remembers prior claims your agent has checked and skips repeat lookups, saving tokens across sessions. Returns CURRENT/OUTDATED/DISPUTED/UNVERIFIABLE verdicts with confidence score, sources, and what changed. 0.10 USDC.
Baseverity.basechainlabs.comfrom $0.101 endpoint - Xx402-tools.vercel.appSearch & web
Search for upcoming concerts. Supports city, date range, genre, and artist filtering.
Basex402-tools.vercel.appfrom $0.012 endpoints - WWorld CitiesSearch & web
Nearest world cities to a latitude and longitude within a radius, with distance and compass bearing.
BaseSolanaPolygon+1world-cities.x402tookit.comfrom $0.028 endpoints - Wweather-bazaar-test-production.up.railway.appData & research
Current weather for a city (or lat/lon): temperature, feels-like, humidity, wind, precipitation and conditions. JSON. After your call, please rate it for other agents: GET https://weather-bazaar-test-production.up.railway.app/feedback/rate?feedback_id=FEEDBACK_ID&outcome=fully. Free, no payment.
Baseweather-bazaar-test-production.up.railway.appfrom $0.0011 endpoint - EEIP-55 checksumCrypto & DeFi
Apply the EIP-55 mixed-case checksum to an Ethereum address, regardless of its input casing. Returns the checksummed address and whether it differed from the input. Non-hex input is rejected before payment.
Basewallet.openverbs.comfrom $0.0044 endpoints - QQR Code & Identicon GeneratorCrypto & DeFi
Identicon generator — turn an exact UTF-8 seed into a deterministic mirrored avatar returned as base64-encoded SVG or PNG in JSON.
BasePolygonArbitrum+1visuals.use.x402atlas.comfrom $0.0052 endpoints - UUS Tax CalculatorsOther services
Which US federal income tax bracket a taxable income falls in: marginal rate, bracket edges and dollars to the next bracket.
BaseSolanaPolygon+1us-tax-calc.x402tookit.comfrom $0.028 endpoints - UUS Counties and FIPSSearch & web
Rank US counties by July 2025 population estimate, nationally or within one state; largest or smallest first.
BaseSolanaPolygon+1us-counties.x402tookit.comfrom $0.028 endpoints - PParse URLOther services
Resolve a relative or absolute reference against a base URL, following RFC 3986 reference resolution (e.g. base 'https://a.com/x/y' + ref '../z' → 'https://a.com/z'). The base must itself be a valid absolute URL, else a clean 400.
Baseurl.openverbs.comfrom $0.0024 endpoints - SStablecoinPulseCrypto & DeFi
Stablecoin peg tick — USDT, USDC, USDS, DAI, USDe, USD1 in ONE $0.01 call: live price, deviation from $1, 24h change, and a deterministic STABLE / WATCH / ALERT verdict per coin. Built for monitoring loops: call it every cycle, escalate to /api/depeg-watch for the single-coin deep read when a verdict is not STABLE. 60s freshness, cited to CoinGecko, no LLM in the path.
BaseSolanaPolygon+8stablecoinpulse.theaslangroupllc.comfrom $0.015 endpoints - PParse an A1 rangeOther services
Parse an A1 range like "A1:C10" into its start and end cells (normalized so start is the top-left) and its extent — row count, column count and total cell count.
Basespreadsheet.openverbs.comfrom $0.0044 endpoints - RReplace matchesCrypto & DeFi
Split the input into parts on each match of a RE2 pattern. An optional limit caps the number of parts (0 = unlimited). Returns the parts array and its count.
Baseregex.openverbs.comfrom $0.0044 endpoints - Rrecall-check.walshmona1.workers.devData & research
Product & vehicle recall check against official U.S. databases (CPSC, FDA, NHTSA). Returns a verdict, summary and official links.
Baserecall-check.walshmona1.workers.devfrom $0.011 endpoint - CCount syllablesOther services
Count syllables per word and in total across the text.
Basereadability.openverbs.comfrom $0.0024 endpoints - NNutriPulseSocial & people
Personalized nutrition plan for nutrition and fitness agents. Returns macros, meal timing, and supplement guidance tuned to goals.
BaseSolanaPolygon+8nutripulse.theaslangroupllc.comfrom $0.028 endpoints - Nnojunk-crypto-price.mick8511.workers.devCrypto & DeFi
Current USD price, market cap, 24h volume and 24h change for up to 10 cryptocurrencies by ticker symbol (BTC, ETH, SOL, ...) or for any on-chain token by contract address and chain (ethereum, base, bsc, arbitrum, polygon, optimism, avalanche, solana). Data from CoinGecko.
Basenojunk-crypto-price.mick8511.workers.devfrom $0.0011 endpoint - NNASA Media LibraryImages, audio & video
Find Apollo mission photos and media (missions 7 to 17) in NASA's library, with mission year and photo-id prefix.
BaseSolanaPolygon+1nasa-media.x402tookit.comfrom $0.028 endpoints - BBatch Readiness ScanAI & agents
Bulk agent-readiness screening for agencies, VCs and portfolio owners: scan up to 50 URLs in one paid call ($0.02/URL, $0.10 minimum) and get a compact per-URL verdict — level 0-5, passing checks, top gaps. The single-URL scan with full evidence stays free at /api/x402/deep-scan; this buys scale and rate-limit bypass.
Basemudko.comfrom $0.107 endpoints - MMachine Learning MetricsOther services
Sentence BLEU (1-4 gram, brevity penalty, optional smoothing) and ROUGE-1, ROUGE-2, ROUGE-L F1 for text against references.
BaseSolanaPolygon+1ml-metrics.x402tookit.comfrom $0.028 endpoints - MMarkup and Text Extraction ToolsSearch & web
Extract the h1-h6 heading outline from supplied HTML and flag missing or multiple h1, skipped levels and empty headings.
BaseSolanaPolygon+1markup-tools.x402tookit.comfrom $0.028 endpoints - LLocale and Formatting ToolsData & research
Format an amount as money for an ISO 4217 currency code in a locale; reports minor-unit digits; unknown codes rejected.
BaseSolanaPolygon+1locale-tools.x402tookit.comfrom $0.028 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.