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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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Crypto & DeFi
1,023 results- HHALOWERK defiwerkCrypto & DeFi
Fetches live offers from a public bridge aggregator and reports for every option what arrives, what it costs in fees and gas, and how long it usually takes. The security model is given equal weight to the price: bridges are the most expensive failures this industry has, so trust_assumptions spells out who a user has to trust for that route to hold. No recommendation is forced - three best values b
Basedefi.halowerk.comfrom $0.0081 endpoint - CCurl HTTP RequestCrypto & DeFi
Send an HTTP request to any URL from our servers and receive the full response — including the status code, all response headers, and the body content. Supports GET, POST, PUT, PATCH, DELETE, and HEAD. Automatically follows up to 3 redirects. Useful for testing endpoints, verifying servers are responding correctly, debugging redirect chains, or fetching raw data without needing a local setup.
BaseSolanacurl-http-request.underscoredone.comfrom $0.011 endpoint - CChat Completion (basic)Crypto & DeFi
LLM completion per call, no account and no API key: POST a prompt (or a messages array) and get the model answer as JSON. Hard caps disclosed in every response (6,000 UTF-8 bytes in, 750 tokens out on this tier). Fixed price per call, signed receipt included so the answer stays auditable. Larger tier at /x402/chat-plus.
BaseArbitrumPolygon+1api.eucompliance.toolsfrom $0.00123 endpoints - Xx402.n9t2.comCrypto & DeFi
N9T2 Bridge paid service: base-xrpl-trading/book_offers
Basex402.n9t2.comfrom $0.00251 endpoint - Xx402-market.kore-app.workers.devCrypto & DeFi
Aggregated crypto market snapshot: prices, Fear & Greed, DeFi TVL, dominance, top stable yields.
Basex402-market.kore-app.workers.devfrom $0.011 endpoint - BBTC Ecosystem RadarCrypto & DeFi
Bitcoin L1 unverified new-protocol candidates only (candidate_protocols full array: evidence_url, tx_count_24h, growth_pct_7d, signal_source). Not in /latest. $0.50. Not investment advice.
BNB ChainBaseSolanax402-btc-radar.jinli-x402.workers.devfrom $0.054 endpoints - Ttoken-api.x402hub.xyzCrypto & DeFi
No description yet.
Basetoken-api.x402hub.xyzfrom $0.0011 endpoint - SSato HubCrypto & DeFi
Daily Sato Score history for one Sato Hub listing: score, tier components, GitHub stars, status and verification state per day, with the dates the score moved (genuine changes vs our own method revisions marked). Captured daily since 2026-06-12; not reconstructable. The current catalog and the daily score line stay free. Priced per daily point returned: $0.005 for up to 90 days, +$0.001 per day be
BaseSolanasatohub.aifrom $0.0052 endpoints - RRugSenseCrypto & DeFi
Scored intelligence on freshly-launched Base tokens: safety + momentum → composite score and an AVOID/WATCH/HOT decision per launch. One call returns a ranked list.
Baserugsense.xyzfrom $0.031 endpoint - RRandom ChoiceCrypto & DeFi
Cryptographically secure random picker for 2-100 JSON choices. Use for low-stakes one-off random or weighted selection, unbiased tie-breaking, and sampling. Returns the selected value and index, request ID, and weight totals for audit logs. $0.001 USDC per paid request. Not for stable assignments, gambling, security tokens, or consequential decisions; outcomes are not provably fair.
Baserandom.preflightstack.comfrom $0.0011 endpoint - FFutures Expiry APICrypto & DeFi
Returns all four quarterly expirations and roll dates of a CME or Eurex index future for one calendar year, with holiday adjustments.
Basefutures-expiry-api.onrender.comfrom $0.032 endpoints - IInfoharmoni Radar whoCrypto & DeFi
Is this x402 seller real? One seller's report card before you pay them: what they sell, price, rank of all sellers, rivals, and from the chain who actually pays it on Base: payer wallets, how concentrated they are, how many came back on 2 or more days, and how many of its payers are wide samplers that paid 30+ sellers (not shoppers). Dated, with the evidence behind each fact. $0.001 a call. Refusa
BaseSolanaausrine-who.onrender.comfrom $0.0011 endpoint - Aassay.cascadiantech.comCrypto & DeFi
Liquidity pools created on Base mainnet in the last 24 hours, newest first, one page per call, filterable by exchange and flag. Each pool carries measured facts, each with the block it was read at, and true/false/unknown flags, with evidence for every true or unknown one; anything missing is stated in words. No score. Payment on Base mainnet.
Baseassay.cascadiantech.comfrom $0.021 endpoint - Aapi.sys84.orgCrypto & DeFi
Discover active Base tokens ranked by momentum, liquidity, and volume. Returns machine-readable market metrics plus report freshness and follow-up risk-check links.
BaseRobinhood Chainapi.sys84.orgfrom $0.021 endpoint - Aagent-margin-router-production.up.railway.appCrypto & DeFi
Agent Margin Router – Gas Fees: Live EIP-1559 gas fees (slow/standard/fast tiers) plus USD cost per transaction type (transfer, ERC-20 transfer, swap, NFT mint) for Base, Ethereum, Arbitrum, Optimism and Polygon. Aggregated from public RPC nodes – no API key. Pay per call with USDC or USDT on Base via x402. 3 free calls per wallet.
Baseagent-margin-router-production.up.railway.appfrom $0.0051 endpoint - TTrust CheckCrypto & DeFi
Is this address safe to send funds to on Base? Checks scam blacklists, address poisoning (look-alikes of your recent counterparties via ?from=), token contracts, burn and never-used addresses. Returns a verdict with reasons.
Basetrust-check.gm-tools.workers.devfrom $0.0022 endpoints - KKYACheckCrypto & DeFi
KYA / counterparty check for a wallet (and optional name): OFAC + wallet risk + signed verdict
BaseSolanakya.lonestaroracle.xyzfrom $0.101 endpoint - Ffunding.rdxdata.xyzCrypto & DeFi
Funding Rate Arbitrage Feed: hourly perpetual funding rates (% per hour) and cross-venue spread signals for BTC, ETH, SOL across Binance, Hyperliquid and dYdX v4. Informational only; not financial advice.
Basefunding.rdxdata.xyzfrom $0.101 endpoint - BBase Honeypot & Rug CheckCrypto & DeFi
Is this Base token safe to buy? Fast token safety check for sniper bots: mint, blacklist, pause and fee-change powers, owner, proxy, liquidity, token age, deployer rug history. Verdict + score. No sell simulation (use /verdict for the honeypot test).
BaseSolanacrypto.theboredlab.comfrom $0.0052 endpoints - AAgent Signup InboxCrypto & DeFi
Email inbox for an AI agent to receive signup verification codes and links (extracted for you). 24h, $0.02, up to 50 emails. Returns address + token; GET /v1/inboxes/{id}/code returns the code. Receive-only.
Baseagent-inbox.sander-van-aard.workers.devfrom $0.021 endpoint - DDJZS Audit GateCrypto & DeFi
DJZS adversarial logic audit of a prediction-market trade intent. Deterministic verdict (PASS/WAIT/FAIL) with risk score, defect flags, verdict_hash, and on-chain Proof-of-Logic receipt. Out-of-scope requests are refused WITHOUT CHARGE. Audit, not advice.
Basemcp.djzs.aifrom $2.001 endpoint - Xx402stockCrypto & DeFi
Single-call snapshot of a ticker's current state: last quote, last trade, today's OHLC + volume + VWAP, previous-day OHLC, today's change vs previous close. From x402stock, a pay-per-call market & economic data API for AI agents. No API key or account; pay in USDC via x402.
Basex402stock.pay.zeroclick.iofrom $0.013 endpoints - Xx402-v2-mint-context-condense.vercel.appCrypto & DeFi
Condense text for token budgets: retained-fact list + dropped-content log + before/after token counts (OpenRouter free-first + approx counter). Audit loss.
Basex402-v2-mint-context-condense.vercel.appfrom $0.0081 endpoint - Wwhale.hugen.tokyoCrypto & DeFi
Look up any Ethereum address — returns entity labels, name tags, and categories from 412K+ labeled addresses. AI agent API for on-chain identity resolution
Basewhale.hugen.tokyofrom $0.012 endpoints - BBase Position WatchCrypto & DeFi
Monitor a Base token position for 24 hours: rug pull alerts on liquidity drops / LP pulls, deployer and insider cluster sells, owner actions, tax changes, honeypot flips, exit traps at your size, smart money / whale exits and attention collapse or spikes. HMAC-signed webhook alerts (optional) plus pullable events. Memecoin position monitoring for trading agents.
Basewatch.facts402.comfrom $0.253 endpoints
XR-VaultCrypto & DeFiXR-Vault per-issuer RWA deep dive
xrplBasevault.xrpl-utilities.io—1 endpoint
XR-TrustCrypto & DeFiXR-Trust XRPL Permissioned Domain (XLS-80) directory: active domains, accepted credentials, credential issuers
xrplBasetrust.xrpl-utilities.io—1 endpoint- TTrue Value RankingsCrypto & DeFi
Custom-weight rerank of every cryptocurrency covered by True Value Rankings: the full TVR table recomputed with the caller's own weights for the 8 fundamental metrics, using TVR's non-public score transformation. $0.05 USDC per call. Educational model output, not a recommendation.
Basetruevaluerankings.comfrom $0.051 endpoint - Ttoken-oracleCrypto & DeFi
Checks whether a token contract address is real, matches its claimed symbol, and whether its supply figures match an independent source (CoinGecko) — before trading, coding, or reporting against it. Catches hallucinated/wrong addresses, address-poisoning impersonation, and tokenomics hallucination.
BaseSolanatoken-oracle.fly.devfrom $0.0031 endpoint
XR-TelemetryCrypto & DeFiXR-Telemetry XRPL macro telemetry snapshot
xrplBasetelemetry.xrpl-utilities.io—1 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.