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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
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 - GGEDX402 KnowledgeSearch & web
Rerank documents against a query with BGE Reranker Base (@cf/baai/bge-reranker-base). POST query plus documents[]; returns relevance scores for search and RAG pipelines.
Baseembed.gedx402.comfrom $0.00233 endpoints - JJSON RepairOther services
Conservatively repair common JSON syntax errors (unquoted keys, single-quoted strings, trailing commas) and parse the result; input is never evaluated as code.
Basedigitalworkerapi.comfrom $0.0012 endpoints - OOpen Source Vulnerability CheckSocial & people
Batch dependency vulnerability check — check ordered exact package versions in OSV with deduplicated CVE enrichment, explicit completeness, and CISA KEV known-exploited signals.
BasePolygonArbitrum+1dependency-risk.use.x402atlas.comfrom $0.0053 endpoints - CClinical Trial SearchSearch & web
Clinical trial search — find ClinicalTrials.gov studies by free text, condition, intervention, sponsor, recruitment status and phase, and get each study's NCT id, titles, status, phases, conditions, interventions, sponsor, start and completion dates, enrollment and whether results are posted. Use for drug development, medical research and patient-recruitment questions.
BasePolygonArbitrum+1clinical-trials.use.x402atlas.comfrom $0.012 endpoints - Cch-cm-kg.aiAI & agents
One paid call on ch-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://ch-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Basech-cm-kg.aifrom $0.011 endpoint - BBuild Scotts Bluff Agent APIAI & agents
American Community Survey 5-year demographics for Scotts Bluff County and each of its ten places, plus a 16-year trend series: population, median household and per-capita income, poverty, median home value, gross rent, housing units and owner/renter occupancy. GET /v1/census.
Basebuildscottsbluff.comfrom $0.012 endpoints - BBiomedical Grant SearchSearch & web
NIH-funded project search — find grants by words in the title, abstract or research terms, filtered by fiscal year, NIH institute, organisation, state, activity code, SBIR/STTR mechanism or award size, with the fiscal-year award amount, investigators, organisation and dates for each. Use to see who NIH funds on a topic, how much, and which small companies.
BasePolygonArbitrum+1biomedical-grants.use.x402atlas.comfrom $0.013 endpoints
Pharos AtlasData & researchRetrieve a fixed English editorial reference for offset-printing review. It covers job records, material questions, registration and sample checks, process limits, and provenance. The response is reference material, not a production inspection or authorization.
Basebilling.pharosatlas.comfrom $0.012 endpoints- Aapi.extendivo.comOther services
Fetch a public URL with SSRF protection and clean text extraction.
Baseapi.extendivo.comfrom $0.0052 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.