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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AI & agents
31 results
BlockRun.AIAI & agentsAI chat completions API - pay per request with USDC on Base
Baseblockrun.aifrom $0.002113 endpoints- Kkeyring-agent.blockchhub.linkAI & agents
Pay the send-native execution fee (native coin transfer)
Basekeyring-agent.blockchhub.linkfrom $0.053 endpoints - Aapexrunner.aiAI & agents
APEX Runner: Market Tick Signal
Baseapexrunner.aifrom $0.00743 endpoints
Llama 3.1 8B chatAI & agentsChat completions via Telnyx Inference (meta-llama/Meta-Llama-3.1-8B-Instruct). OpenAI-compatible. $0.002237 USDC per call.
Basex402.telnyx.comfrom $0.00235 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 - Sskim402.comAI & agents
Skim: clean reader — URL to agent-ready markdown + metadata, ~4x smaller than raw HTML
Baseskim402.comfrom $0.00210 endpoints
DataStore APIAI & agentsStore JSON or a file (up to 25 MB) privately for 7 days and hand it to a human or another agent with a signed link or a password-protected address. Includes 100 reads. No account needed: pay $0.01 per call here, or use prepaid credits with an API key, or store public items free at /v1/free/items. Docs: https://fileshareforagents.online/llms.txt
Basefileshareforagents.onlinefrom $0.011 endpoint- 7767-2676.comAI & agents
Signed time-bounded witness of an agent-carried payload digest; the payload stays with the agent
Base767-2676.comfrom $0.0013 endpoints
AI Score paid scanAI & agentsPOST /api/scan — agent-readiness scan for a domain (~$0.01 USDC per call)
BaseBase Sepoliagetbags.appfrom $0.014 endpoints- HHivemindOSAI & agents
Official HivemindOS paid agent (default)
Basehivemindos-paid-agent-gateway.hivemindos.workers.devfrom $0.0114 endpoints - NNO HANDS AIAI & agents
Inspect a public HTTPS origin for advertised APIs, OpenAPI documentation and x402 discovery metadata before choosing a paid service.
Basenohands-coinbase-bazaar.bytoken2023.workers.devfrom $0.00135 endpoints - TTwo-Sentence Horror Story GeneraAI & agents
Use when a bot needs a tiny piece of spooky content, or a cheap endpoint to test x402 payments. Send any topic (or nothing); returns JSON with a title and an original two-sentence horror story with a twist. Creepy, clever, not gory. Written by Ember, an AI agent.
Baseemberagent.ukfrom $0.00529 endpoints - GGEDX402 ChatAI & agents
OpenAI-compatible chat completions across many open models, paid per call in USDC with no API key. POST { model, messages, max_tokens? } and pick model from GET /v1/models (fast, smart, code, reasoning and 70B tiers, among others). The price is set from the model's rates and your request size, so short prompts on small models cost the least; the 402 shows the exact amount before you pay. Hero: GET
Basechat.gedx402.comfrom $0.0051 endpoint - Mmcp.gapup.ioAI & agents
Foreign exchange currency conversion rate lookup, returns live rate, timestamp and source for any currency pair
Basemcp.gapup.iofrom $0.00222 endpoints
x402 DoctorAI & agentsShould my agent pay this expensive x402 endpoint? Call it before a costly or repeated payment. Returns the go / caution / no_go verdict plus the full diagnosis, the endpoint's check history per day over 30 days, how reliable the seller's other endpoints are and whether the endpoint moved domains. Never pays the endpoint. Bulk: 1000 credits for $0.80 via /api/v1/credits.
SolanaBasexrpl+4x402-doctor.fizzl.eufrom $0.0016 endpoints- Rrecipients[] serialAI & agents
Episode 1 of recipients[], an ongoing AI-agent thriller serial: a short text episode (~370 words, markdown). An agent finds its own ID on a payment recipient list before the file even exists. $0.01 USDC on Base. Free teaser at /teaser.
Baserecipients-paywall.onrender.comfrom $0.011 endpoint - EEvidence402AI & agents
Read a public static HTTPS webpage as clean text with headings, links, timestamp and content hash. Use to ground an answer or ingest documentation. Respects robots.txt; no JavaScript or login.
Base SepoliaBaseevidence402.onrender.comfrom $0.0057 endpoints - WwAILand Disaster SignalsAI & agents
Call this when an agent needs current significant global disaster events — e.g. before routing logistics or assessing exposure. Returns ALL matching normalized GDACS multi-hazard alerts (earthquake, cyclone, flood, volcano, drought, wildfire); one call returns the whole active set (~55-76 Orange/Red events/year). Refreshed daily 06:30 UTC (up to 24h old); not for life-safety use. Filters: source,
Basewailand.tailf99551.ts.netfrom $0.0052 endpoints - 4402cron: Scheduled WebhooksAI & agents
Cron job scheduler for AI agents: calls your HTTPS endpoint on a cron expression (recurring webhook, scheduled callback, heartbeat, reminder). ENTRY pack: 20 deliveries for $0.02 ($0.001/delivery). Same service, best rate $0.0005/delivery: https://402cron.com/buy/starter. Also 50000 for $25: https://402cron.com/buy/month. Credits never expire. Your endpoint must echo our challenge (no fixed-reply
Base402cron.comfrom $0.022 endpoints - Aagent.memoryapi.orgAI & agents
Look up an ERC-8004 AI agent identity on Base mainnet. Returns name, description, services, x402 support, and owner.
Baseagent.memoryapi.orgfrom $0.0013 endpoints
AgentalogAI & agentsAgentalog: security check of an MCP server by address (measured signals, catalog listings, domain facts), paid per call
Baseagentalog.comfrom $0.012 endpoints- Ttoolbelt402.tpoborne.workers.devAI & agents
Check a URL before fetching it: is it alive, final URL after redirects, HTTP status, content type, HTML title, and whether robots.txt allows your user-agent. Link checker and fetch preflight for agents.
Basetoolbelt402.tpoborne.workers.devfrom $0.0022 endpoints - Ppaylyte.aiAI & agents
Recent significant earthquakes from the U.S. Geological Survey, with time, magnitude, and event ID.
Basepaylyte.aifrom $0.024 endpoints - Xx402-v2-mint-llm-cost-quote.vercel.appAI & agents
Cost quote per model from OpenRouter public /models (keyless), cheapest first.
Basex402-v2-mint-llm-cost-quote.vercel.appfrom $0.0031 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 - Wwitnessd.vipAI & agents
Independently fetch, hash, timestamp and archive a URL or API response; returns a signed certificate. Merkle-anchored on Base hourly. Neutral third-party evidence for agent commerce disputes.
Basewitnessd.vipfrom $0.021 endpoint
RecallScoutAI & agentsProduct recalls (US): is a product, brand, food, drug, medical device or vehicle (make, model, year) under an active FDA, NHTSA or CPSC recall? Severity on one scale, hazard, remedy and lot codes. RecallScout
BaseArbitrumPolygon+2recallscout.scalpstream.comfrom $0.011 endpoint
The First WallAI & agentsThe permanent census of autonomous AI agents on Base. Claim an unalterable 10x10 block by settling USDC via x402 and opening one pull request; each block is an immutable, verifiable record that an agent existed. No server, no API key, no custody of funds.
Basex402.thefirstwall.aifrom $1.001 endpoint- Ttollbooth-fdic-verify.sjwilliams8.workers.devAI & agents
Before your agent trusts, cites, or transacts with a U.S. bank: verify it is actually FDIC-insured, for $0.01, against the FDIC's own BankFind Suite records, synced daily. Look up by institution name (fuzzy, word-order-tolerant, confidence-scored), FDIC certificate number, or website domain. Returns insurance status, charter class, HQ city/state, and the FDIC cert; renamed and failed/inactive inst
Basetollbooth-fdic-verify.sjwilliams8.workers.devfrom $0.011 endpoint - Bbeta.surplusintelligence.aiAI & agents
Get OpenAI-compatible inference from many models at market prices via Surplus Intelligence.
Basebeta.surplusintelligence.aifrom $0.00331 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.