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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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2,776 results- 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 - Ggrokbot-dashboard.a3migos.workers.devCrypto & DeFi
Base wallet research API: for any Base mainnet address returns ETH and USDC balances with USD values (CoinGecko/Coinbase quotes), EOA vs smart contract, nonce (tx count), current gas base fee, ERC-20 token holdings, and recent USDC inflows/outflows with a counterparty count. Read live from public Base RPCs at request time. Paid per call with x402 (USDC on Base); invalid input returns 400 and is no
Basegrokbot-dashboard.a3migos.workers.devfrom $0.0053 endpoints
Crypto Market SignalsCrypto & DeFiDaily crypto market regime in one call: BTC/ETH vs 20/50-day MAs, breadth of the point-in-time top-N (no survivorship bias), coins nearest a 20-day breakout, and the R1 breakout strategy's gate and entry signals. No candle fetching or indicator code. Completed UTC daily closes only.
Basegrok-backtest-api.fly.devfrom $0.015 endpoints- Ffurigana.agentic-jp.comImages, audio & video
Convert kanji-mixed Japanese (JP) text to hiragana, katakana, or romaji (Hepburn/Nippon/Passport), with a per-token breakdown of surface form, reading, and part-of-speech. Backed by the kuromoji morphological analyzer. Use to generate ruby readings, build search indexes, or preprocess text for speech synthesis.
BasePolygonSolanafurigana.agentic-jp.comfrom $0.0013 endpoints - Fflorida-sirs-check.mick8511.workers.devSearch & web
Florida condo SIRS filing check: has a Florida condominium association reported a completed Structural Integrity Reserve Study to the state (DBPR)? Search by building or association name, optionally narrowed by city, zip or county.
Baseflorida-sirs-check.mick8511.workers.devfrom $0.011 endpoint - FFDA Drug LabelData & research
FDA drug label lookup — the newest prescribing information for a brand or generic drug name: boxed warning, indications, dosage, contraindications, warnings, adverse reactions and drug interactions as previews or one section in full, plus manufacturer, route, RxNorm, UNII and application numbers. Use to read what a drug is approved for and its official warnings.
BasePolygonArbitrum+1fda-drugs.use.x402atlas.comfrom $0.013 endpoints - FFathomCrypto & DeFi
Exit-liquidity and price-trust assessment for a Base ERC-20 token at a requested USD position size. On-chain sell quotes cover Aerodrome, Slipstream, and Uniswap V2/V3/V4. Returns tradeable, caution, illiquid, or unverified with executable proceeds, price impact, confidence, concerns, and unmeasured checks. Inputs: token address and size_usd.
Basefathom-api.mioku-fathom.workers.devfrom $0.0011 endpoint - AApiToll Multi-Chain EVM GasCrypto & DeFi
Multi-chain EVM gas price oracle for AI agents — 17 chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB, Avalanche…). One x402 call returns slow/standard/fast EIP-1559 tiers as DROP-IN maxFeePerGas + maxPriorityFeePerGas in wei (plug straight into a viem/ethers tx, no conversion, exact even on sub-gwei L2s), plus base fee, head block, and fullness, from a live eth_feeHistory call. Pass ?chain
Baseevm-gas.apitoll.cloudfrom $0.0011 endpoint - Ddomain.hugen.tokyoCrypto & DeFi
WHOIS registration lookup — registrar, creation/expiry/updated dates, domain age in days, name servers, DNSSEC, registrant country/org, EPP status codes. All TLDs (.com .net .org .io .dev .ai ccTLDs gTLDs). Per-field error resilience for TLD-specific parsing quirks. No WHOIS library setup or TLD-specific parsing needed. Accepts USDC payments on Base and Solana
BaseSolanadomain.hugen.tokyofrom $0.017 endpoints - CColor schemeDeveloper tools
Find the nearest CSS named color to a given color, by perceptual distance.
Basecolor.openverbs.comfrom $0.0024 endpoints - Ccashboard.liveCrypto & DeFi
The stored open interest series of one Hyperliquid perp over the last 15, 60 or 240 minutes, from Cashboard's own minute-by-minute history: open interest in contracts and USD, mark price and funding APR per point, and the change over the window. Points are 1, 2 or 5 minutes apart. Not charged until the history reaches back over the whole window and has a snapshot from the last two minutes. Names a
BaseSolanacashboard.livefrom $0.017 endpoints - FFaroAI & agents
Single-signal check: is this website's pricing machine-readable for AI agents? Detects Offer schema with price/availability and pricing-transparency signals. Returns yes/no plus underlying checks and fixes. Useful for procurement and comparison agents.
Basebyfaro.aifrom $0.012 endpoints - Xx402-v2-mint-musicbrainz-lookup.vercel.appImages, audio & video
MusicBrainz WS/2 lookup/search (keyless; User-Agent required; 1 req/s). entity + mbid OR query → trimmed JSON.
Basex402-v2-mint-musicbrainz-lookup.vercel.appfrom $0.0031 endpoint - Sstaging.toolkit.devOther services
Add a new memory. This method is called every time the user informs anything about themselves, their preferences, or anything that has any relevant information which can be useful in the future conversation. This can also be called when the user asks you to remember something.
Basestaging.toolkit.devfrom $0.012 endpoints - Qquietstore-production.edge-7e13f.workers.devSearch & web
Smallest paid pack ($0.005): a machine-readable merge checklist and a one-request smoke purchase on this store. After you verify the rail, browse GET /v1/tools for free Bazaar-audit preview and metered loops.
Basequietstore-production.edge-7e13f.workers.devfrom $0.0052 endpoints
pkgpulseData & researchRank up to 5 alternative npm packages and get a recommendation with the gap quantified: full disclosed-rubric health report per package, close calls flagged as close calls. The 'axios vs got vs undici' decision in one call. Params: ?names=a,b,c. JSON.
Basepkgpulse.letom1176.workers.devfrom $0.012 endpoints- OOutcomeScoutCrypto & DeFi
Turn a news headline into the matching Polymarket prediction markets to trade. One call returns the top markets ranked by relevance, each with live odds/implied probability, 24h drift, spread, on-book liquidity, volume, resolution date, and a ready bet link. Use when a trading agent reacts to breaking news and needs the tradeable market instantly. $0.01 USDC on Base.
Baseoutcomescout.vercel.appfrom $0.011 endpoint - Iitalycheck.italycheck.workers.devAI & agents
Look up an Italian public administration or public-service operator by 11-digit codice fiscale in IndicePA (AgID). Use when an agent must verify a public-sector counterparty, find its official PEC (certified email) addresses, or confirm it exists before e-invoicing. Input: ?cf=80016350821.
Baseitalycheck.italycheck.workers.devfrom $0.0051 endpoint - HHyperliquid Funding ExtremesSocial & people
Full Hyperliquid funding extremes (carry-cost leaderboard)
Basehl-tool.darren-pi.workers.devfrom $0.0021 endpoint - Ggateway.drillr.aiMarkets & finance
Paragraph-cited semantic search over indexed SEC filings
Basegateway.drillr.aifrom $0.011 endpoint - Ffree-api-resell.relayhop.workers.devOther services
Polymarket prediction-market listings. Query: ?limit=1-100. Source: Polymarket Gamma API (free).
Basefree-api-resell.relayhop.workers.devfrom $0.0022 endpoints - EexecboxDeveloper tools
Execute code in any supported language. 5s CPU timeout, 128MB RAM. Supports 40+ languages including Python, JavaScript, C, C++, Java, Go, Rust.
Baseexecbox.xyzfrom $0.0021 endpoint - Ddartapi.ljaysk.comOther services
Korean corporate disclosure (DART) event stream, cursor-based delta. All filings, classified with importance score.
BaseSolanadartapi.ljaysk.comfrom $0.0023 endpoints - Ccompanylens.ve1iko.chatgpt.siteSocial & people
Resolve a UK legal company name or registration number to a sourced Companies House profile. Returns company status, incorporation, SIC codes, registered office, filing due dates and overdue flags. Use for company research and CRM enrichment. Ambiguous names return candidates without settlement. Does not verify trading websites or provide credit scores.
Basecompanylens.ve1iko.chatgpt.sitefrom $0.011 endpoint - MMoon phaseDeveloper tools
Compute the Moon's phase name, age in days since the last new moon and illuminated fraction (0..1) for a UTC date/time. Uses the mean synodic month (29.53 days).
Baseastro.openverbs.comfrom $0.0043 endpoints
RAVNCrypto & DeFiRAVN — best-price swap quotes across 22 execution venues and 18 chains, including native (non-wrapped) Bitcoin as either source or destination. 0% protocol fee, non-custodial. Returns a quoteToken; pass it to POST /execute.
BaseSolanaapp.ravn.exchangefrom $0.0013 endpoints
QuorumzSearch & webNews articles, each with the quorums and viewpoints related to the article.
Baseapi.quorumz.comfrom $0.0056 endpoints- Aapi.doseplot.comAI & agents
Pharmacokinetic simulation for one compound: walks the published model at one dose and cadence and returns the modelled serum curve over the requested horizon plus a 60-day washout tail. Deterministic math over published reference data -- not medical advice, not a prescription, and for relay to a human decision-maker rather than autonomous administration.
Baseapi.doseplot.comfrom $0.015 endpoints - Aapi.ambolt.devSearch & web
Resolve a company name, website domain, registry number, LEI or VAT number to its official legal entity: registry, registry number, legal form, status, address, industry codes, size where published and LEI. Searches national registers (Norway, Finland, Czechia, Slovakia, France, UK, Latvia; Poland by KRS number) and GLEIF, scores the match and links every record to its source. Company-level only:
BasePolygonSolanaapi.ambolt.devfrom $0.011 endpoint - FFortune DemoOther services
Random fortune — fixed price; x402 exact or MPP one-shot
Baseagentcash-fortune-demo-six.vercel.appfrom $0.0011 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.