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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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2,879 results- Fforge-economic-agent.vercel.appMarkets & finance
Execute a structured FORGE task using a promoted tool
Baseforge-economic-agent.vercel.appfrom $0.011 endpoint - Ffamilyofficeknowledgegraph.aiAI & agents
The Family Office Knowledge Graph index of record for $0.01 USDC — every node's record list (LEI, legal name, aliases, register ids, field states, as-of) as a signed statement (EdDSA, kid fo-kg-x402-2026-09) with a receipt that resolves forever at /x402/receipt/{nonce}. Operator: Agentic KG Holdings.
Basefamilyofficeknowledgegraph.aifrom $0.011 endpoint - EEmail Verifier & ValidatorDeveloper tools
Takes one email address and tells you whether it can actually receive mail. Returns a verdict of valid, invalid, or risky, splits the address into username and domain, and flags free providers and role accounts like admin@ or support@. One address per call.
BaseSolanaemail-verifier.underscoredone.comfrom $0.011 endpoint - Ccontract-guardCrypto & DeFi
Risk check for an EVM contract/token address
Baseeltociear-contract-guard.hf.spacefrom $0.0051 endpoint - RReverse DNS lookupCrypto & DeFi
Reverse-resolve an IPv4 or IPv6 address to its PTR hostname(s). No PTR record returns an empty list. This is reverse DNS (PTR) — not ENS or onchain name resolution.
Basedns.openverbs.comfrom $0.0062 endpoints - Dde-cm-kg.aiAI & agents
One paid call on de-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://de-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Basede-cm-kg.aifrom $0.011 endpoint - Ddawn.xoghks.comOther services
Korean Christian dawn-prayer journal article: 2026-10-29 육체의 일과 성령의 열매
Basedawn.xoghks.comfrom $0.011 endpoint - Ddatoka-api.bhazarstudio.workers.devOther services
Datoka API: a portable signed commitment to a client-declared API exchange for response handoffs, archived decision inputs and change investigations. 0.002 USDC per receipt; offline verification is free. Keep original bytes locally. Does not prove provider origin or content truth. Retry with the same event, idempotency key and original payment authorization.
Basedatoka-api.bhazarstudio.workers.devfrom $0.0021 endpoint - Ddata-api.orbbit.coSearch & web
Search for packaged food products by name, brand, category, barcode, or ingredient.
BaseEVM chain 5042data-api.orbbit.cofrom $0.012 endpoints - WWickedAPI Broker SyncCrypto & DeFi
Prop-firm platform integration registry — live-verified methods (Topstep ProjectX API, FTMO MatchTrader bridge) and connection status.
Basebroker-sync-api.wickedapi.comfrom $0.0011 endpoint
DAP BellwetherMarkets & financeSearch publications from financial regulators in Canada, the US, the UK and the EU.
Basebellwether.dap.solutionsfrom $0.011 endpoint- UUS Treasury Interest CostsMarkets & finance
US Treasury interest rates — latest monthly average rates on outstanding government debt, including Treasury bills, notes, bonds, TIPS, floating-rate notes and savings securities. Track federal borrowing costs and compare rates across security classes.
BasePolygonArbitrum+1avg-interest-rates.use.x402atlas.comfrom $0.011 endpoint - Aaudit-site-web.pga-agent.frCrypto & DeFi
On-chain facts for any Base address: EOA or contract, first transaction and age, transaction count, ETH and USDC balances, top 10 tokens held with USD value when known, recent contracts created. Information, not investment advice.
Baseaudit-site-web.pga-agent.frfrom $0.0074 endpoints - Aaudio.halowerk.comImages, audio & video
Four actions on one endpoint. create opens a slot with its position, length, reserve price and closing time, and returns an admin token that only the opener holds. bid places a sealed bid, checked against the reserve, the slot length and the publisher's excluded categories before it is accepted — a rejected bid is recorded with its reason rather than silently dropped, so a bidder can see why it ne
Baseaudio.halowerk.comfrom $0.0042 endpoints - Aau-cm-kg.aiAI & agents
One paid call on au-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://au-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Baseau-cm-kg.aifrom $0.011 endpoint - CChit402Crypto & DeFi
Signed spend receipts for agent x402 payments — who paid which call, verifiable by a third party. Treasury desk and possession book for agent spend — export, policy, evidence. POST /v1/chat/completions is the x402 USDC door on Base and Solana. Returns signed receipt + public verify_url. Paying this host is real mainnet USDC.
SolanaBaseapi.xfuel.appfrom $0.0024 endpoints - WWhiteMagic receipt verifyData & research
WhiteMagic continuity-receipt verification: POST a signed receipt bundle and receive a verdict (TRUSTED / PROVISIONAL / INSUFFICIENT_EVIDENCE / UNTRUSTED) with coded errors and an optional signed verification receipt. Verification is stateless, offline-verifiable, and fail-closed; keyless /health, /info, /revocations and GET /anchors remain free.
Baseapi.whitemagic.devfrom $0.011 endpoint - Aapi.seneschal.spaceOther services
Single-fact: timestamp + age of the most recent Zcash block, plus hash, difficulty, and size.
Baseapi.seneschal.spacefrom $0.0013 endpoints - AA2A Nexus CanadaBuysCrypto & DeFi
CanadaBuys IT tender data
Baseapi.postulated.storefrom $0.012 endpoints - TThe Fine PrintOther services
How to cancel a subscription, or a store's return policy: steps, deadlines, fees, catches, official source and date checked.
Baseapi.howtocancel.aifrom $0.012 endpoints - AAnansi Model AdvisorAI & agents
Cheapest LLM meeting your constraints (price/context/modality) PLUS every price change and deprecation in the window. Providers publish only today's catalog and overwrite it — the change history exists nowhere else
Baseanansidata.xyzfrom $0.015 endpoints - Aallooloo.ioAI & agents
One paid call on allooloo.io 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://allooloo.io/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Baseallooloo.iofrom $0.011 endpoint - AAgentResolverCrypto & DeFi
No-body $0.001 x402 settlement test for funded agents. Verifies the buyer wallet, facilitator, USDC payment path, and paid delivery end-to-end by returning a timestamped pong only after successful settlement.
BaseSolanaagentresolver.vercel.appfrom $0.0018 endpoints - Aagentic-radar.aiAI & agents
One paid call on agentic-radar.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://agentic-radar.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
Baseagentic-radar.aifrom $0.011 endpoint - AAgent Economy ReportCrypto & DeFi
Operational trust rating (AAA to D, trust line BBB) of any x402 service, as of today: tier, outlook, flags, uptime, organic paying agents, settled USDC, centrality. Sybil-resistant, computed daily from on-chain settlement on Base, Polygon, Arbitrum and Solana plus a liveness probe. Check a service before paying it. Free today-only JSON: https://agenteconomy.report/s/<host>.json
Baseagenteconomy.reportfrom $0.0052 endpoints
AgentAuditCrypto & DeFix402 services ranked by 30-day on-chain settlement volume, optionally by category.
BaseSolanaagentaudit.waltsoft.netfrom $0.011 endpoint- Aagent-production-d9d8e.up.railway.appCrypto & DeFi
Verify that a Base transaction paid what you expected. Give a tx hash; get status (success/reverted/pending), confirmations, from/to, ETH value, L2 fee and every ERC-20 Transfer decoded with symbol and decimals. Optional to, token and minAmount params return verified=true/false plus the matching transfer. Live data from Base RPC. Use it before delivering goods or crediting a deposit.
Baseagent-production-d9d8e.up.railway.appfrom $0.0031 endpoint - WWeb Search for AgentsSearch & web
Use when an agent needs fresh web results for a question. Send a plain query and get up to 10 ranked results with title, URL, publish date and a short excerpt, ready to cite. Fast, no account and no API key on your side; pay per call with x402. Results come from a licensed search provider and are not cached across customers.
BaseBase Sepoliax402op-edge-39830b.fly.devfrom $0.0051 endpoint - BBase Token Check by LIN DeskCrypto & DeFi
Use when an agent needs a quick ERC-20 contract check on Base before trading or accepting a token: name/symbol/decimals/total supply, owner and whether ownership is renounced, EIP-1967 / legacy proxy (upgradeable) detection, flags. $0.003 per call, USDC on Base (x402). Read-only; not security advice. Non-contract addresses and upstream errors are not charged.
Baselin-desk-x402.lindesk.workers.devfrom $0.0031 endpoint - AAdalia UndertowCrypto & DeFi
Latest liquidation map for one coin: price clusters of leveraged liquidation levels with each cluster's share of the map and its exact (on-chain) share, the reference price, open interest on-chain and on centralized exchanges, and the exact vs modeled fraction. Coins: BTC, ETH, SOL, XRP, DOGE, BNB, AVAX, LINK, LTC, ADA, SUI, WIF.
Basex402.adalia.eefrom $0.011 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.