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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- Aagentic-x402.aiAI & agents
Allooloo Capital Markets estate index for $0.01 USDC: every market node (Canada, United Kingdom, United States, Germany, France, Netherlands, Switzerland, Australia, Singapore, Japan, South Korea), issuer and disclosure-event counts, drop date; add ?record=node/exchange/code (e.g. uk-cm-kg/LSE/BARC) for one Capital Markets Record, sourced per field, public-record only. Every settlement answers wit
Baseagentic-x402.aifrom $0.011 endpoint - Xx402-v2-mint-base-gas-price.vercel.appDeveloper tools
Base mainnet gas price via public RPC (keyless). eth_gasPrice (+ optional latest block). Data only — not advice.
Basex402-v2-mint-base-gas-price.vercel.appfrom $0.0021 endpoint - AAgent Output VerifierCrypto & DeFi
Check an AI agent's track record: signed verification history, pass/fail counts, recency-weighted score. $0.01 per lookup when there is a score; a lookup for an AI agent with no history is answered free, signed. USDC via x402 v2 (Base/Solana).
BaseSolanascore.sarnai.devfrom $0.011 endpoint - BBroken Key RemapperOther services
Purchase and download the Broken Key Remapper software (one-time license).
Basebrokenkey-api-link-tau.vercel.appfrom $0.0031 endpoint
aptu.devCrypto & DeFiEchoes a JSON {message} back; live demand probe for x402 settlement.
Baseaptu.devfrom $0.0034 endpoints
TradeOSMarkets & financeSearch market instruments by name or ticker. Returns matching tickers, names, exchanges and market-open status. Use the returned ticker with get_market_snapshot for the latest market data, get_market_candles for OHLCV history, or get_market_technical_analysis for written chart analysis. Popular examples include AAPL, SPY, gold XAUUSD (C:XAUUSD), EURUSD (C:EURUSD), BTCUSD (X:BTCUSD), and ETHUSD (X:
Baseai.tradeos.xyzfrom $0.0054 endpoints- Xx402-v2-mint-hex-decode.vercel.appOther services
Local-only hex → utf8 / bytes32 / address / selector. No 4byte.directory. Offline. Amp port.
Basex402-v2-mint-hex-decode.vercel.appfrom $0.0011 endpoint - CCutoutImages, audio & video
Remove the background from a photo. Send an image URL, get a transparent PNG cutout of the subject (BiRefNet model).
Basertnl1z960zy00xyx.68r.lambda-web.us-east-1.on.awsfrom $0.011 endpoint - WWord of the DayImages, audio & video
Get today's curated Word of the Day (definition + part of speech).
Basex402wordoftheday.vercel.appfrom $0.00151 endpoint
StakeChainCrypto & DeFiHighest-APY pool on Base for one asset, junk-farm filters applied
Basestakechain-api.vercel.appfrom $0.0011 endpoint- Ssolana-wallet-x402Crypto & DeFi
Call this before your agent buys a Solana token. One call runs five isolated checks: token risk (sell-side skim and fee/hook controls), top-holder concentration (the factor behind our bundle score), stablecoin lookalike detection, xStock status (issuer mint list, lookalikes and issuer objections), and optionally an x402 payee check (verdict ok, caution, do_not_pay or unknown). Unknown mints return
SolanaBasesolana-wallet-intel-phi.vercel.appfrom $0.00312 endpoints - RRoast GeneratorOther services
Pay for a lighthearted developer roast generated on-demand.
Baseroastx402endpoint.vercel.appfrom $0.00171 endpoint
nsgoods Solana Payment CheckCrypto & DeFiDid this Solana payment really arrive? Verifies that a finalized mainnet transaction credited the exact amount of a token to the payee. Signed VERIFIED, REFUTED, UNCONFIRMED or NOT_FOUND with a per field breakdown. $0.01 in USDC on Base. Free preview: GET /settle/preview
Basex402.nsgoods.orgfrom $0.012 endpoints- NNexari Agent ToolsImages, audio & video
Hallo Welt der Nexari GmbH: kleinster bezahlter Test-Endpunkt, gibt Gruß, Zeit und gezahlten Betrag zurück. Hello world from Germany: smallest paid x402 smoke test, returns greeting, timestamp and paid amount. Voraussetzung/required: accept_terms_hash, business_name (B2B) – /legal/terms.json
Basex402.nexari.cloudfrom $0.0017 endpoints - Wwebwache.halowerk.comOther services
Canonical change monitor plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.
Basewebwache.halowerk.comfrom $0.0013 endpoints - Wwebtechnik.halowerk.comOther services
Parser-blocking script budget repair plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.
Basewebtechnik.halowerk.comfrom $0.0013 endpoints - SSignal Forge FetchImages, audio & video
Public HTML URL to bounded Markdown, source URL, retrieval time and content hash. No JavaScript, login, PDF or CAPTCHA bypass. Unsupported or oversized content fails before settlement. Reuse request_key and the original payment proof to recover a completed response for 24 hours without another charge.
Basesignalforgestudios.comfrom $0.0055 endpoints - CCompare versionsData & research
Compare two semantic versions and report which is greater (precedence-aware).
Basesemver.openverbs.comfrom $0.0023 endpoints - AAcademic Paper SearchSearch & web
Scientific and academic paper search: research papers and scholarly literature from arXiv, PubMed, OpenAlex, Crossref and Semantic Scholar in one call, deduplicated and retraction-aware. Each hit: DOI, authors, venue, snippet, citation count and citations per year, type, open-access PDF link. Sort by relevance, recency, citations or impact. Keyless. For literature review and citing research.
BasePolygonArbitrum+1papers.use.x402atlas.comfrom $0.0052 endpoints - Nnojunk-ai-text.mick8511.workers.devAI & agents
AI Text Tools classify: Classify text into one (or several) of your own labels; the answer is always one of the labels you gave.
Basenojunk-ai-text.mick8511.workers.devfrom $0.0023 endpoints - Mmizan-bazar.higgsfield.appCrypto & DeFi
Mizan report card for any of 3,650 x402 operators (57,020 endpoints on file) — this call: api.loyalspark.online. Liveness across surveys, latency, x402 conformance, price demanded at the door vs price advertised in the catalogue, and for endpoints Mizan actually paid for, whether they delivered, refused, or charged and delivered nothing — with the on-chain tx. Replace the last path segment with an
Basemizan-bazar.higgsfield.appfrom $0.012 endpoints - MMiorail b20_exit_analysisOther services
Miorail x402 paid resource
Basemiorail.xyzfrom $0.0024 endpoints - Jjp-cm-kg.aiAI & agents
One paid call on jp-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only, with an EdDSA-signed receipt that resolves forever at https://jp-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Basejp-cm-kg.aifrom $0.011 endpoint - IIP IntelOther services
Inspect up to 200 IP addresses at 0.0005 USDC per address.
Baseip.halowerk.comfrom $0.0012 endpoints - Iinhalt.halowerk.comOther services
Author identity audit fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.
Baseinhalt.halowerk.comfrom $0.0013 endpoints - SStrip HTML to textOther services
Remove all HTML tags, returning the plain text content. Entities are decoded to real characters by default (set decodeEntities=false to keep them encoded).
Basehtml.openverbs.comfrom $0.0024 endpoints - HHosakaSocial & people
Use when you have a company domain and need to know what the company is before spending more. Returns the company name and site title, domain age, registrar, mail provider, DNS provider, DMARC and HTTPS status, and a count of the third-party vendors detected. One call, no signup, no API key. The cheapest way to qualify a domain before buying a fuller record.
BasealgorandPolygon+4hosaka-agents.vercel.appfrom $0.0051 endpoint - Ffx-reference-rates.mick8511.workers.devMarkets & finance
Currency exchange rates from the European Central Bank's official euro reference rates: convert an amount from one ISO 4217 currency to up to 30 others, today or on any date in the last 90 days. Cross rates computed via EUR.
Basefx-reference-rates.mick8511.workers.devfrom $0.0031 endpoint - Ffetchgate.devOther services
Fetch a URL server-side and return structured metadata.
Basefetchgate.devfrom $0.0016 endpoints - Ffetchwerk Web ExtractionSearch & web
Read the mandatory public disclosure of one domain and return company, postal address, e-mail, phone, VAT and register data with a source for every value.
Basefetch.halowerk.comfrom $0.0062 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.