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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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732 results- BBlockchain.info APICrypto & DeFi
Paid AI-agent access to Blockchain.com Explorer API
Baseapi.blockchain.infofrom $0.00559 endpoints - SSiteCheck Web IntelImages, audio & video
Wikimedia Commons image search (MediaWiki API, public, no key): file title, direct image URL, size, MIME type, license, author and description for free-licensed files. Returns file metadata only, not image bytes.
BaseSolanaEVM chain 5042+9api.webintel-api.workers.devfrom $0.002129 endpoints - QQuartermaster DNS LookupImages, audio & video
Resolve DNS records using DNS-over-HTTPS and return structured JSON for infrastructure, security, and agent workflows.
BaseSolanaquartermaster.surewhynot.appfrom $0.00143 endpoints
WebberSites x402 Data APICrypto & DeFiANTHROPIC-COMPATIBLE /v1/messages — Claude Haiku 4.5 through the exact Anthropic API dialect: same request/response shape, no Anthropic account, the x402 payment IS the auth. Point an Anthropic SDK's base_url at https://api.webbersites.com and pay per call. Caps: 16,000 input chars, 1,024 output tokens (max_tokens clamped), text-only, no streaming.
Baseapi.webbersites.comfrom $0.00123 endpoints
NansenCrypto & DeFiGet Smart Money Holdings Data
SolanaBaseX Layer+2api.nansen.aifrom $0.0160 endpoints- AAgent Utility SuiteSocial & people
Psychrometric calculator for HVAC engineering: from any two of dry bulb, wet bulb, dew point, RH, humidity ratio, enthalpy or grains, the full moist-air state (plus specific volume, density, vapor pressure) at any elevation, IP or SI. ASHRAE Fundamentals 2021 equations, cross-checked against PsychroLib. Shows every step with the numbers and ASHRAE references. $0.002 USDC per call.
Basex402-agent-api.onrender.comfrom $0.00134 endpoints - 33RouteCrypto & DeFi
Price a swap without building a transaction. Returns expected input, output, and gas without constructing an executable transaction. Quotes are informational and can change with liquidity and chain state.
BaseEVM chain 42793Solanaapi.3route.iofrom $0.0011 endpoint - RRandom FactOther services
Returns a single random fact as JSON in exchange for a micropayment.
Baserandomfactsx402.vercel.appfrom $0.011 endpoint
ManyLives AIImages, audio & videoRead back values the paying wallet saved with /paid/memory/set: one key, or list your keys by prefix (keys, sizes and expiry, newest first). Another wallet can never see them. No free trial.
BaseSolanaapi.manylives.mefrom $0.00286 endpoints- QQuant Agent ShopSocial & people
IP address lookup for one public IPv4 or IPv6 address: country, region and city (a city-level estimate with coordinates), continent, and network (ASN number and organisation). Use for fraud checks, analytics or routing. Not for finding a street address or a person. Local database, no third-party call per lookup. Typical response under 100 ms. Failed calls are not charged.
Basequantagentshop.comfrom $0.009926 endpoints
Maha Context CompilerCrypto & DeFiCompress long documents and RAG inputs into token-budgeted, deduplicated context packs with source-linked provenance. Returns original and compiled token counts, so the saving is verifiable. Net-positive above N = fee / (r x p) tokens: r your reduction, p your input price. Extractive and budget-bound, so check includedPassages before relying on it. Ranks Latin, Cyrillic, Greek, Arabic and CJK; CJK
BaseArbitrumPolygonmahastrategies.comfrom $0.002215 endpoints- Aagentbit.appSearch & web
Web search API for AI agents — find current information, news, documentation, competitors, prices or any fact that needs a fresh, citable source. Pay-per-call, no API key. Returns ranked results with title, URL, snippet, publish date and source from neural + keyword search over the live web, with automatic provider failover. Use when an agent asks: search the web, look up the latest on a topic, fi
BasePolygonArbitrum+2agentbit.appfrom $0.00197 endpoints - SSpread Paywall APICrypto & DeFi
Generates random UUID v4 values, returns a JSON array of UUID strings
BaseSolanaworkspace-x402-paywall.onrender.comfrom $0.00157 endpoints - Xx402-factorySocial & people
Cheapest endpoint: liveness plus x402 payment pipeline check — Returns ok with the server time and whether this call was paid. Use it to verify your x402 client end to end before spending on data endpoints.
Basex402-factory.comfrom $0.001114 endpoints - SSiteCheck Trade & EnergyData & research
Monthly Australian thermal coal reference price in USD per metric ton (World Bank series PCOALAUUSDM, via FRED). Not the Newcastle FOB spot index or Richards Bay prices; the route name is kept for the owner. Latest value plus up to 24 months of history.
BaseSolanaEVM chain 5042+9api.tradeenergy-api.workers.devfrom $0.002111 endpoints - SSiteCheck Shop & SocialImages, audio & video
Hiking trails from OpenStreetMap (via the free Waymarked Trails API), not from AllTrails, which blocks automated access: search by trail name or list routes around a point. Per trail: OSM ID, name, ref, network level, length in km, loop/linear, hardest OSM sac_scale difficulty, surfaces, operator, website, Wikidata, description and center point. No user ratings, reviews or photos (OSM has none). C
BaseSolanaEVM chain 5042+9api.shopsocial-api.workers.devfrom $0.002111 endpoints - JJev Structured EvaluationAI & agents
Structured evaluation with TypeSafe's Jev (System One) model. Send any state plus typed questions — noul (true/false), choice (pick one), or score (ordinal scale) — and get back calibrated probabilities and confidence for each. Built for routing, classification, triage and policy checks where a fast, predictable, machine-readable answer beats prose.
Basejev-x402.vercel.appfrom $0.0011 endpoint
x402 Web SearchImages, audio & videoWeb search that returns structured SERP results as JSON. Runs on a dedicated SearXNG instance aggregating multiple engines, so there is no per-engine API key, quota or HTML scraping to manage. Each result carries title, URL, snippet, the source engine and a published date where available. Choose general web, news, or image results, up to 10 per call. Use it to ground an answer in current web sourc
Basesearch.cyberwarex.comfrom $0.00111 endpoints
ClawFetchSocial & peopleDiscovery endpoint listing all 17 available structured-data extractors and the domains each one supports, so an agent can decide whether /extract can handle a given URL before paying for it.
Baseapi.clawfetch.aifrom $0.0019 endpoints
1gatewayImages, audio & videoUse when scheduling across time zones or turning a local time into UTC without guessing DST. Input: to (IANA zones or KST, PST, CET...), optional from (zone of a local time, default UTC), time (ISO 8601, Unix seconds, or now). Output: JSON UTC instant, Unix time, and per zone: local ISO time with offset, weekday, abbreviation, DST and business-hours flags, day difference. Example: ?time=2026-10-12
BaseSolana1gateway.devfrom $0.00285 endpoints- HHALOWERK formwerkOther services
Prüft am Objekt seite den Befund Übermittlung vor Einwilligung.
Baseformwerk.halowerk.comfrom $0.001100 endpoints - Xx402.browserbase.comSearch & web
Fetch a page and return content, headers, and metadata. $0.01 per request.
BaseSolanax402.browserbase.comfrom $0.0112 endpoints - Eeu-verifyMarkets & finance
Hourly weather forecast for any point on Earth from Open-Meteo (blend of ECMWF/GFS/ICON models, refreshed hourly; data CC-BY 4.0). Query: ?latitude=48.8566&longitude=2.3522&hourly=temperature_2m,precipitation,wind_speed_10m&forecast_days=2 (1-16 days, ~80 hourly variables available, optional daily= aggregates and timezone=auto). ISO 8601 time arrays + units. 15 min cache.
Basedata.greeneris.iofrom $0.00183 endpoints
Vibe SpringsSocial & peopleReal-time BTC/USD price feed oracle. Retrieves live spot rate, 24h high/low, and volume directly from Coinbase Exchange.
Basevibesprings.netfrom $0.00127 endpoints
Minifetch Technical SEO APIImages, audio & videoCheap robots.txt preflight check before you call the Minifetch /extract and /run/seo-page-audit endpoints: returns whether Minifetch may fetch a target URL (allow/deny) plus its crawl-delay. If blocked and the site is not yours try our external proxy routes. If blocked and the site is yours or to set a custom crawl-delay read https://minifetch.com/tutorials/unblock-minifetch Checks the URL as give
BaseSolanaminifetch.comfrom $0.00115 endpoints
API AcreImages, audio & videoConvert an offset-aware ISO 8601 instant or a local wall time between IANA time zones with explicit DST gap and repeated-hour handling, nearby transition evidence, and a pinned local time-zone database.
BaseSolanaapiacre.comfrom $0.00142 endpoints- TTabulariumCrypto & DeFi
Agent memory: save a value under a key in a persistent key-value store owned by the paying wallet. The first write opens a 30-day workspace. Memory survives restarts, new machines and hand-offs between agents. Every write is hash-chained and signed (Ed25519), so the history verifies offline. Values up to 64 KB; failed writes are not charged.
Basetabularium.matt-3e0.workers.devfrom $0.0025 endpoints - Aagentshield.liveAI & agents
Call when an agent has an IBAN and needs the checksum, the expected length, and the country format. Does not confirm the account exists.
Baseagentshield.livefrom $0.00166 endpoints
AiSpace VeniceImages, audio & videoAsync text-to-video and image-to-video generation on Venice (WAN 3.0, Seedance 2.5, HappyHorse, and more), paid per request in USDC on Base via x402, no API key. Model ids via GET /api/v1/models?type=video. Lifecycle: quote, queue, retrieve, complete (see related routes).
BaseSolanax402.aispace.botfrom $0.0114 endpoints
API DirectSocial & peopleSearch for tweets by keyword.
Basex402.apidirect.iofrom $0.003142 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.