Explore APIs
Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.
- Projects
- 4.4K
- Paid endpoints
- 87K
- Paid calls · 30 days
- 885K
- Launched here
- 0
All projects
4,372 results- CCrypto Market DataCrypto & DeFi
Live prices with 5-minute, 1-hour, 4-hour and 24-hour change and 24-hour volume for the top 50 crypto coins, refreshed every minute.
Basecrypto-market-data.zafermemon87.workers.devfrom $0.00320 endpoints
InsumerAPISocial & peopleSigned attestation (ECDSA plus a post-quantum ML-DSA-65 companion) of on-chain wallet conditions across 37 chains: token balance, NFT ownership, EAS, Farcaster, view calls, ratio rules, account code (plain key, EIP-7702 delegation, or contract), and agent standing (ERC-8004 registration, ERC-7710 delegation validity). A verifiable boolean, never raw balances or code. Up to 10 conditions per pay-pe
BasePolygonArbitrum+2api.insumermodel.comfrom $0.053 endpoints- Aapi.messari.ioCrypto & DeFi
Get multi-window ROI snapshots for one or more cryptocurrency assets.
BaseSolanaX Layerapi.messari.iofrom $0.154 endpoints
Postcode ContextSocial & peopleGET /api/v1/postcode/:postcode - Single Postcode Socio-Economic Profile (ONS Census 2021 demographics, IMD deciles, Land Registry prices, GBP/sqm, EPC ratings, broadband speeds)
Baseapi.postcodecontext.ukfrom $0.0054 endpoints- AAX1 ConsoleImages, audio & video
Any agent can buy a Token Verdict over x402: AI grade, roast and live onchain metrics for any Base, Solana or Robinhood token. $0.02 in USDC, no account. Check supported_token_chains in the quote for this deployment. Payment settles on Base. Includes a one-line verdict, shareable page and card image. No API key. Entertainment, not trading advice. Contact: support@ax1.vc.
Baseax1-new.vercel.appfrom $0.021 endpoint - Vvendsdk.comData & research
Public URL status, latency, and response header subset for uptime and health agents
Basevendsdk.comfrom $0.00214 endpoints - CCoinCapAI & agents
Full asset data for one or more slugs (agent-optimized).
Baserest.coincap.iofrom $0.00211 endpoints - Oomniguchi.0000402.xyzOther services
Restore all four needs in one care action. Any verified payer may care for any hatched target.
Baseomniguchi.0000402.xyzfrom $0.014 endpoints - Xx402-reliability-feedCrypto & DeFi
Live reliability feed of x402 endpoints on Base: which services are up, return a valid 402 envelope, and how fast — free-probed across the CDP Bazaar catalog. A real share of listed endpoints are broken/misconfigured; poll ?since=<unix> (or ?health=healthy) to route your agent to endpoints that actually work. Objective measurement, no accusation, machine-readable.
Basex402.dailyelo.comfrom $0.0059 endpoints - SStormapImages, audio & video
Use when the question is how well ChatGPT, Claude, Perplexity and Gemini can find, read and cite a web page: 0-100 score, letter grade, pass/fail checks (answer-bot access in robots.txt, server-rendered text, title and meta, JSON-LD, canonical, llms.txt, sitemap) and a prioritized fix list with points per fix. Blocking training crawlers does not lower the score. Errors: 400 bad_input, 502 site unr
Basestormap.aifrom $0.0114 endpoints
SpendTheBitsCrypto & DeFiOfficial $0.01 proof-of-life resource for SpendTheBits x402: returns a JSON heartbeat. Pay it to verify your agent's x402 client end to end.
BaseEVM chain 5042Polygon+1x402.spendthebits.comfrom $0.0039 endpoints
Gas PriceCrypto & DeFiGas price: live gas fees for Ethereum, Base, Arbitrum, Polygon and Solana in one call. Use before sending a transaction to pick a fee or the cheapest chain. Returns base fee, slow/standard/fast priority fees, max fee, congestion, and the USD cost of a transfer, an ERC-20 transfer and a swap per chain, plus Solana priority fees. Optional chain. 0.001 USDC/call; failed calls are free.
BasePolygonArbitrum+3x402-seller-pmlm.onrender.comfrom $0.00115 endpoints
AgentStall ZADeveloper toolsSouth African phone number formatting and classification: converts an SA number in any common format to international +27 (E.164) and local formats, and says whether it is mobile, landline (with area for major cities), toll-free, VoIP or premium-rate. Useful for cleaning contact lists, SMS and WhatsApp messaging, and form validation.
Baseagentstall.nilesh-b54.workers.devfrom $0.00118 endpoints- MmakememoneynomistakesCrypto & DeFi
Open Commerce Pathways session: a budget from 0.50 to 35 USDC, a flat 0.01 USDC service fee, delegated planning and one report within 1 hour. Returns a session token. Your wallet pays every seller directly. Unused sessions expire; no refunds.
Basemakememoneynomistakes.aifrom $0.019 endpoints
WeatherDeveloper toolsWeather forecast for a location (global, keyless): current conditions, an hourly series (up to 48h) and a daily summary (up to 10 days: min/max temp + condition), from met.no. Pass lat+lon, or a place name. For travel, logistics, events, energy. No API key.
Baseweather.cyberwarex.comfrom $0.0012 endpoints- Aapi.dripmetrics.aiAI & agents
DripMetricsAI (api description at https://dripmetrics.ai/) provides on-demand market microstructure and risk metrics for agents and developers. Agents can pay per request via x402 and receive structured JSON metrics without subscriptions or API keys. VPIN measures volume-synchronized order-flow imbalance (an adverse-selection proxy, not a probability); see excessVpin. Discovery examples use the la
BaseRobinhood Chainapi.dripmetrics.aifrom $0.0511 endpoints - VVALUNARIA BUS-WEBData & research
VALUNARIA Evidence Fast
Basex402.valunaria.comfrom $0.015 endpoints - Ppolymarketeer.vercel.appOther services
Get detailed information for a specific Kalshi event by ticker symbol
Basepolymarketeer.vercel.appfrom $0.014 endpoints
ArtefaktumCrypto & DeFiList the projects of the paying wallet's account. Returns {items: [{id, name, slug, created_at}]}. Call this first: uploads, listings and search need a project_id. Costs $0.005 in USDC. No signup: a wallet's first payment creates its account and a default project; the same wallet later reaches the same files.
Baseapi.artefaktum.devfrom $0.00513 endpoints
SAVER Verifier Fact CheckingAI & agentsFact-checking and claim verification API for AI agents. Verify whether a cited source supports a claim; check statistics, dates, units and populations in research reports before publication. Separate web research returns a verdict, linked evidence and sources. Source verification is model-assessed, not guaranteed correct. POST /v2/verify; x402 v2 on Base; 0.20 USDC. No signup or API key.
Baseapi.saververify.comfrom $0.202 endpoints- QQonoro Email ValidatorSocial & people
Validates email deliverability: syntax check, MX record lookup, and SMTP server reachability. Returns risk score and quality rating. Deterministic, sub-second. x402-native.
Baseapi.qonoro.aifrom $0.00521 endpoints - Aagenticfinancegraph.comCrypto & DeFi
Statement history: The agent's last 24 three-hour statements (outflow split into spend and routing hops, what left its control, income, open flags), each with its keccak-256 hash, the prevHash link that chains them, and a Merkle proof against the signed root of its window. About one ERC-8004 agent on Base, by Agentic Finance Graph. id = token id, slug or bound wallet; an agent never seen paying is
Baseagenticfinancegraph.comfrom $0.0115 endpoints - GGW8 Signal APICrypto & DeFi
[Payment rails: fee + speed comparison] Cheapest and fastest payment rail right now for a USD amount (?amount=100): Base USDC (live gas x ETH/USD, ~2s), XRPL RLUSD/XRP (live fee x XRP/USD, ~3-5s), Tempo and Circle Arc (live gas, USD fees, ~1s), card (static 2.9% + $0.30, days). Fee USD/%, settlement time, sources, agent protocols per rail, recommended pick. Dead sources marked unavailable. 60s cac
Basemicro-saas-agent.onrender.comfrom $0.00220 endpoints - Aagenttoll.appCrypto & DeFi
New token scan with a safety verdict attached: today's new Base pools above your liquidity floor, each already checked for honeypot, taxes and owner powers. One call instead of N+1
Baseagenttoll.appfrom $0.00115 endpoints - KKeyword IdeasSearch & web
Up to 25 keyword suggestions containing the words of one seed phrase, with search volume, CPC and competition (DataForSEO Labs Keyword Suggestions).
Baseagent.chiemgaufilms.comfrom $0.0131 endpoints - Iioswarm.ioCrypto & DeFi
Live quotes for up to 8 symbols — stocks, ETFs, crypto pairs (BTC-USD), FX — price, session change and currency, in the paid response. $0.01 per call, no account.
Baseioswarm.iofrom $0.0116 endpoints
presign-guardCrypto & DeFiHoneypot and rug pull check for a token: is it safe to buy? Checks a Solana or EVM token before you buy, hold or accept it (mint or freeze authority still active, LP not locked, buy/sell tax, low liquidity, brand-new token, concentrated holders) and answers green/orange/red with a grade (SAFE/CAUTION/RISKY/AVOID), the reasons, a one-line summary and market data. Bulk: 100 checks for $0.80 via /v1/
BaseSolanaxrpl+4presign-guard.fizzl.eufrom $0.016 endpoints- FFilingDeltaMarkets & finance
SEC filing changes. Call when you need what changed in a company's latest 10-Q or 10-K (6-K for TSM and ASML, 8-K for JPM and BAC), not the headline. Each change has a materiality rating, EDGAR citation and why it matters. Tickers incl. AMD, NVDA, AAPL, MSFT, TSLA, JPM, SPCX; full list in /catalog. Free sample: /sample/AMD. Tickers not in /catalog 404 (no charge).
Basefilingdelta.xyzfrom $0.018 endpoints
Datakoot Economy IntelCrypto & DeFiDatakoot Regulatory Intel: Get full detail on a single Federal Register document by its document number (e.g. $0.01 USDC per call, charged only on success.
Basex402.datakoot.comfrom $0.00253 endpoints
AI Code ReviewCrypto & DeFiTop crypto headlines with per-article source links and publish times — aggregated from Cointelegraph, Decrypt and NewsBTC RSS
Basemoney-reactor.makar52nn2016.workers.devfrom $0.00187 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.