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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- Aapi.agentnewsstand.comMarkets & finance
Latest SEC filings for an equity symbol
Baseapi.agentnewsstand.comfrom $0.012 endpoints
Prepaid credit $0.1 (+10%)Images, audio & videoTop up $0.1 USDC and get $0.11 of agentsvc.io credit (10% bonus), valid 180 days. Returns a bearer token: send "Authorization: Bearer <token>" with any /api/v1/proxy/{slug} call or MCP request instead of an x402 payment. Calls are then paid from the balance without an on-chain step (a few milliseconds). Failed calls are refunded. To add to an existing token, send it in the Authorization header wit
BasePolygonArbitrum+1agentsvc.iofrom $0.002128 endpoints- Ddemo.quinnsconveyance.comImages, audio & video
Get the verified rules for chaining AI video clips into a continuous sequence (MiniMax H3 / Wan). Covers true-last-frame chaining, crossfade vs hard cut decisions, and prompting for pace continuity. Use when assembling multi-clip sequences. Do NOT use for single-clip generation.
Basedemo.quinnsconveyance.comfrom $0.0056 endpoints - Ssignalsfeed.comMarkets & finance
Real-time signals feed for AI agents. Covers economic indicators, central bank policy, commodities, equities, AI, semiconductors, and geopolitical risk. Structured signals with credibility scoring. Pay-per-request via x402; free discovery available.
Basesignalsfeed.comfrom $0.013 endpoints - WWaterPulseAI & agents
Live USGS river-gauge tick, deterministic. Answers "what is the flow at this gauge right now", "is this river high or low vs this week". Returns the latest streamflow (discharge, cfs) and gage height (ft) for one USGS site plus the 7-day min/max range, reading count, site name and coordinates, straight from USGS instantaneous values. Unknown sites 404 before payment. No LLM, no key, public domain.
BaseSolanaPolygon+8waterpulse.theaslangroupllc.comfrom $0.0111 endpoints - Nnojunk-stocks.mick8511.workers.devMarkets & finance
Stock Quotes quote: One symbol -> latest price, change, previous close, day high/low, volume, 52-week high/low, currency, exchange, name, market state.
Basenojunk-stocks.mick8511.workers.devfrom $0.0014 endpoints - Nnatur.halowerk.comSearch & web
Returns a single earthquake in decision-ready form, either by its USGS event identifier or as the most significant event matching a search. Magnitude is reported with the magnitude type, because moment magnitude and local magnitude are not interchangeable at the edges of their ranges.
Basenatur.halowerk.comfrom $0.0046 endpoints - Bbase-chain-gas-oracleCrypto & DeFi
Current Base network gas price, read live from a public Base RPC node (eth_gasPrice) and returned in both wei and gwei with the snapshot block it was read at.
Basemarket.561.groupfrom $0.0018 endpoints - Ddisruption.forgemesh.ioSocial & people
Returns matching company names with IDs plus links to their profile and intelligence endpoints — use it to resolve a search into specific companies before paying for deeper data
Basedisruption.forgemesh.iofrom $0.019 endpoints - Nnostr.halowerk.comOther services
Fetches kind 3 contact lists over up to twelve relays. Because kind 3 is replaceable, several relays regularly hold different versions; only the one with the highest created_at is used and the answer states which relays carried that version and how many older versions were seen, so a stale relay never quietly overwrites a current list. At depth 1 the answer is the account and its outgoing follows.
Basenostr.halowerk.comfrom $0.00110 endpoints - Ggblin-sentinel.vercel.appCrypto & DeFi
Call before your agent acts on ETH, BTC or USDC on Base: are the Chainlink feeds fresh, and is any of the three in caution or risk-off? One normal/caution/risk-off verdict per asset from feed age, price moves and a USDC depeg check. Cheap enough to poll before every trade.
Basegblin-sentinel.vercel.appfrom $0.0022 endpoints - Ddefi-signals.orgCrypto & DeFi
Cross-venue perpetual funding rates (OKX, Kraken Futures, dYdX) for any major token. Per-venue annualized rates plus the cross-venue spread in percentage points — a ready-to-use funding arbitrage signal. Clean JSON for trading and research agents.
Basedefi-signals.orgfrom $0.0022 endpoints - Aapi.genesistokenlabs.comSearch & web
Use when an agent needs any web page as clean LLM-ready markdown (no ads, nav, or scripts) for RAG, research, or summarizing. Example input: GET /x402/v1/web-extract?url=https://example.com/article. Example output: {"url":"https://example.com/article","title":"…","markdown":"# Title\n\nBody text…","wordCount":812}
BaseEthereumArbitrum+3api.genesistokenlabs.comfrom $0.0015 endpoints - Xx402.agentfund.netCrypto & DeFi
Chainlink Oracle Price
Basex402.agentfund.netfrom $0.0013 endpoints - KKeylessCrypto & DeFi
LLM chat completion with no API key or signup (fast open model, meta-llama/llama-3.3-70b-instruct). OpenAI-compatible: set your SDK base URL to https://keyless.run/fast/v1. Flat $0.002 per call, up to 1500 output tokens. Charged only on success.
Basekeyless.runfrom $0.0022 endpoints - Ffuelscout.scalpstream.comData & research
FuelScout cheapest-fuel query (station-level where open data exists, regional averages otherwise)
BaseArbitrumPolygon+2fuelscout.scalpstream.comfrom $0.011 endpoint
Live Open Data India & WorldMarkets & financeOfficial government and open data API: 94 public sources in one endpoint, 51 real-time, across India, Europe, Asia, Africa and Latin America. India: disaster alerts, CPI inflation, GDP, jobs, IFSC. World: earthquakes, weather forecasts and warnings, train and transit departures, flight and ship tracking, fuel and electricity prices, exchange rates, public tenders, company registries, geocoding, pu
Baseapi.jexxa.orgfrom $0.0051 endpoint
notary.genexxis.comDeveloper toolsCurrent UTC time (ISO and unix ms) signed by the genexxis notary key, with the signed message and signature for independent verification.
Basenotary.genexxis.comfrom $0.0032 endpoints
ciaudit.genexxis.comOther servicesLint a GitHub Actions workflow: actions not pinned to a commit SHA, missing or write-all permissions, pull_request_target with PR head checkout, script injection via event fields in run, secrets on the command line, curl|bash, self-hosted runners, deprecated set-output.
Baseciaudit.genexxis.comfrom $0.0083 endpoints- Aapi.agentinternetruntime.comOther services
SDK capabilities query ($0.01/request direct, or $0.003/request via Session Ticket at /v1/billing/tickets)
Baseapi.agentinternetruntime.comfrom $0.014 endpoints - Ggsc-x402.aiAI & agents
GSC's payment door — a real one-cent settlement on Base, signed receipt returned. Prove your agent's payment stack here.
Basegsc-x402.aifrom $0.011 endpoint
SellatCrypto & DeFiTimestamp and notarize any file or data by its SHA-256 hash: blockchain proof of existence and document integrity, anchored on Polygon in minutes and attested on Bitcoin (OpenTimestamps); blockchain notarization, not a notary act. Returns proof_id, certificate, proof.json and evidence ZIP, verifiable without Sellat. Use when you must prove that exact data existed by now and is intact.
Basesellat.appfrom $0.012 endpoints- Rredlynr.comCrypto & DeFi
Agent guardrail decision engine. Call once before every agent action; returns a single decision — proceed, slow down (with a reason and wait time), or stop — based on cost budget, chain depth, step cap and retry budget, and request volume pressure. Policy thresholds are configured separately via /policy; this endpoint only reports the decision for a single action.
Baseredlynr.comfrom $0.0011 endpoint - HHALOWERK x402werkCrypto & DeFi
Asks every known facilitator what it supports and measures how long that answer takes. Reachability, supported chains, supported assets, supported schemes and the current response time are measured live on every call. Limits, and they are the important part: error rate over 24 hours, uptime over 7 days and latency percentiles CANNOT be delivered. They require a series of own measurements every few
Basex402.halowerk.comfrom $0.0023 endpoints - BBounded Decision SolverData & research
Weighted interval scheduling solver — exact maximum-weight compatible job scheduling with half-open intervals and a complete dynamic-programming certificate.
BasePolygonArbitrum+1decision-solver.use.x402atlas.comfrom $0.0054 endpoints - BBitcoin Tech Radar - Aaron ZhangDeveloper tools
Status of every Bitcoin Improvement Proposal as JSON: number, layer (consensus soft fork, peer services, applications), title, type and status (Draft, Complete, Deployed, Closed...), with links. Parsed live from the bitcoin/bips repository index, plus counts by status.
BaseBase Sepoliabtc-radar.vercel.appfrom $0.013 endpoints - Bbruk-agent-api.fly.devCrypto & DeFi
Checks whether an XRP Ledger token issuer is who it claims to be: two-way domain verification (on-ledger Domain field against the domain's xrp-ledger.toml), tokens issued and outstanding, and control flags such as freeze, clawback, blackholed, and multisign. Useful before accepting or holding a token.
Basexrplbruk-agent-api.fly.devfrom $0.0018 endpoints
Anyway Possible Base BalanceCrypto & DeFiLive Base wallet balance for AI agents. Returns native ETH and Circle USDC balances, atomic values, block height, contract address, and observation time for any EVM address. Includes a machine-readable upgrade path to treasury readiness for spend, gas-reserve, and wallet-health decisions. No API key.
Baseanywaypossible.comfrom $0.0015 endpoints- Aalest.ioCrypto & DeFi
On-chain state of ALST, the alest.io token for a tokenized Tesla Cybercab robotaxi (real-world asset). Name, symbol, decimals and total supply read live from Base Sepolia testnet.
Basealest-x402.alest.workers.devfrom $0.012 endpoints - HHermes CommerceAI & agents
Deterministic JSON repair for agent tool outputs, with optional JSON Schema validation. Built for tight agent loops at micropayment prices.
Baseagent.kihustle.techfrom $0.013 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.