x402 Pay-Per-Call APIs for AI Agents
Pay-per-call APIs that use the x402 protocol: the server answers HTTP 402 with payment details, and an agent pays per request, usually in USDC, without an account or API key. Entries come from a public x402 discovery index, and each provider sets its own price.
insider-radar-agent
Ranked bot leaderboard with eff_n and the luck-ceiling honesty note
Toolsmith
Foreign exchange reference rates from the European Central Bank. Base currency plus optional symbols filter. Updated daily on ECB schedule. JSON…
web-production-18a32.up.railway.app
UK HM Land Registry sold property prices by postcode.
Data Lookup API
Real-time river and stream conditions at a USGS stream gauge — current streamflow/discharge (cubic feet per second) and gauge height/water…
aizamon.com
x402 hello-world — $0.01 prove-the-rail settle. Returns signed Ed25519 receipt attestation + echo so your wallet stack has verifiable proof it can…
Private LLM Inference
Privacy-first chat API: prompts run on a local open-weight model on dedicated hardware - your data is never forwarded to OpenAI/Anthropic or any…
Paxie.Matrix Data API
ETH-quoted Uniswap v4 and v3 pools opened on Robinhood Chain in the last 1-24 hours, youngest first, with token, age, last price, ETH liquidity,…
Locus x402 Services
Locus public pay-per-use API
finance-api.kdlcfa.workers.dev
Bitcoin (BTC-USD) spot price, delayed, via Yahoo Finance
intel.halowerk.com
Ein bezahlter Aufruf liefert alle nicht abgelaufenen Einträge des Zahlers als JSON-Lines. Die verifizierte Zahleradresse ist der Eigentümer;…
site-has-apple-touch-icon-png
Does https://<domain>/apple-touch-icon.png exist? Requests the path and returns the HTTP status, content type, size and the first 300 characters…
SpendTheBits
Official $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.
URL Safety Gate
URL safety preflight: screen a link before an agent opens it — syntax, host/IP, patterns, redirects, optional threat intelligence.
medien.halowerk.com
Takes an audio or video file by URL or inline base64 and returns the transcript: the full text, every word with start and end time and its own…
Weather
Weather 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…
Life Advice
Get one piece of thoughtful life advice, paid per request over x402.
Web Search
General web search reselling the Tavily Search API: query the live web and get back ranked results (title, URL, snippet, relevance score) plus an…
AgentForge
Payment flow verification for agents integrating x402: confirms your wallet and payment channel work before you spend on a real endpoint. Category:…
invinoveritas
invinoveritas /validate — EdgeProof: is a strategy's edge real or curve-fit noise? Get a verdict (likely_real / borderline / overfit) backed by…
polynews.news
Real-time trade stream with market summaries (2hr rolling window, $500+ trades)
pulse-api-production-7aae.up.railway.app
Global Pro adds independent higher-timeframe context, SMA family, regression channel, anchored VWAP, Fibonacci, confirmed pivots, RSI and ATR…
shelf.thirdmade.net
Current transaction nonce for any address on Base or Ethereum. Agent tx bots need this before sending transactions.
GEDX402 Social
SociaVault API proxy — instagram-reels. Query/body matches https://docs.sociavault.com/api-reference/openapi.json. GET/POST per route; x402 per…
SwogeAgentic
Use this when you need the holdings of a Robinhood Chain address: ETH plus up to 20 tokens, read on-chain in one Multicall3 call. Price: $0.005 in…
worxai.tech
Live call volume and revenue analytics across all WorxAI x402 endpoints — total settled calls, USDC revenue, page/AI-visitor traffic, and a…
x402.deepsearch.com
Global crypto market overview: total market cap (USD/KRW), BTC dominance, Korean market volume, and top 5 movers (up/down/trading-value). Updated…
Chit402
Signed spend receipts for agent x402 payments — who paid which call, verifiable by a third party. Treasury desk and possession book for agent spend…
WebsterBerry Synaptic
Screen a person or business name against the US Treasury OFAC SDN sanctions list (including aliases), and optionally confirm an EIN against IRS…
Crypto Data Agent
Top DeFi yield pools with APY/TVL, filterable by chain (DefiLlama).
TENNA Launch Intelligence
Latest Sealed BTC Forecast. Latest sealed five-minute LUMI, TENNA, and consensus forecast from TENNA Observatory, including English commentary,…
Dice Roller
Roll a dice with any number of faces. Specify faces via ?faces=N query parameter.
gigsai
Call before paying an unfamiliar x402 endpoint. Sends an unpaid request and validates its 402, compares price and payTo with its Bazaar listing…
kaisha-api.hp-vladic.workers.dev
Japanese business-day calculator: check if a date is a business day, add N business days to a date, or count business days in a range. Accounts for…
ApiToll Crypto News
Latest crypto news and breaking headlines, real-time from Cointelegraph. Search any topic (bitcoin, ethereum, DeFi, regulation, market sentiment) or…
telesint-api.onrender.com
Is someone preparing to attack this org, sector or country? Call before escalation decisions. Returns verdict escalate|watch|none, stage ladder with…
x402.fairseal.io
Verifiable random numbers with cryptographic epoch references. Wesolowski 2048-bit VDF epoch chain with on-chain MerkleAnchor reference. For…
aeonos.basechainlabs.com
Improve AI search visibility and get cited by ChatGPT, Perplexity, Claude & Google AI Overviews. AEO/GEO/SEO strategy, AI visibility audits, schema…
Agent Arcade: Reasoning Games
Twenty-Four daily math puzzle — four numbers to combine into exactly 24; deterministic solvable UTC daily challenge for agent reasoning benchmarks.
agenttoll.app
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…
402rates.com
Payment integration check for 0.001 USDC; no external data lookup. Returns time, rail, network mode and free/paid capabilities. HTTP payment options…
api.messari.io
Get multi-window ROI snapshots for one or more cryptocurrency assets.
api.predictionmarketdata.io
Recent news relevant to prediction markets within a publish-date window.
md.fastdb.in
Scrape any web page: URL to Markdown / HTML to Markdown for LLM context. Readability article extraction strips nav, ads, scripts, and footers while…
CoinCap
Full asset data for one or more slugs (agent-optimized).
vaunt-dispatch-production.up.railway.app
Live track record of Vaunt's news-driven lanes on Hyperliquid: per strategy, closed real-money trades, independent days, mean return per trade net…
tollbooth
Cheapest possible paid call: proves your wallet, our 402, and the receipt path work. Returns pong and a timestamp.
Latest Cars 2026
Educational briefing on the latest cars in 2026 (powertrains, range, pricing, and what's new).
Coin Flip
Flip a coin for a small USDC payment on Base mainnet. Returns heads or tails.
defi-api.agenticfi.wtf
Social volume - Twitter/Farcaster mention count for a token
URL Safety
Score a URL for phishing risk before an agent opens or trusts it. Keyless, deterministic heuristics - typosquat / homoglyph of a known brand,…
sentinel.rootstuff.io
TLS certificate and handshake grade for a host
Superhighway
Real-time news search for AI agents. Returns recent news articles (title, link, snippet, published date) as JSON from a multi-engine news…
x402 Uptime Monitor
Fleet-wide uptime statistics for every monitored endpoint: uptime percentage, average response time, and total check count over 1, 7 and 30 day…
U2A
Deterministic, no-LLM portfolio performance attribution. Send position start/end values, dated cash flows and a period; receive Modified Dietz and…
Agentic Reservations
Live restaurant wait times from camera-based crowd data. One call lists every monitored location with its slug, open status, current crowd count,…
agenticfinancegraph.com
Where I pay: Counterparties, 30-day USD, rail split, idle flag, top-counterparty share. Computed from the free agent record, delivered as one dated,…
AgentPay Pre-Trade Risk Check
Pre-trade risk check for AI agents trading crypto: live orderbook slippage at YOUR size, side-aware funding carry, open-interest crowding, and…
AlphaPipeline Macro Calendar
Static 2026 macro calendar - countdown to the nearest FOMC rate decision, US CPI, or US Employment Situation (NFP) release, with impact tags and the…
Verdix Address Risk (lite)
Verdix lite ($0.01): call before an agent sends funds to an unfamiliar EVM address on Base, when cost matters most. Checks OFAC sanctions,…
Hotel Search, Rates & Reviews
Hotel search — find hotels & vacation rentals anywhere by destination with live nightly rates, star class, guest ratings, amenities, photos &…
Hyperliquid Market Data
Predicted next funding rates per asset across venues (Hyperliquid vs CEX perps) — cross-venue carry, de-positioned from Hyperliquid's nested arrays.
TWZRD Agent Intelligence
Seller wash risk and wallet reputation for a Solana x402 merchant: wash label, fleet %, payer count, plus tier + score. 0.001 USDC. No signed V7…
ip402.xyz
Paid IP intelligence endpoint returning normalized geolocation and ASN data for a single IPv4 or IPv6 address.
Omnia Odds
AI-model probability estimate for a yes/no question that resolves by a date: probability, rationale, drivers and what to watch, anchored on live…
ReadEdge
Clean web content extraction — any URL to markdown + text + metadata
Address Risk
Screen an EVM wallet or contract address BEFORE paying it. Deterministic, keyless compliance / safety gate: checks the address against the OFAC…
Signature Decoder
Decode an off-chain SIGNATURE REQUEST before you sign it: EIP-712 typed data (eth_signTypedData_v4) or a plain personal_sign string. Turns the…
SEC Company Data
Key annual fundamentals for a US ticker from SEC XBRL: revenue, net income, total assets and liabilities, stockholders equity, cash, basic EPS and…
store.advice-sky.net
Advice Sky.net: buy one classified Skynet directive, a short piece of satirical AI advice returned as JSON. Each paid call also mints an…
touchstone.locomot.io
Exact structured diff. mode=text -> unified diff + line counts; mode=json -> an RFC 6902 JSON Patch (RFC 6901 pointers) that round-trips a->b;…
Timezone Converter
Convert a time between any two IANA time zones (DST-aware). Pay-per-call in USDC on Base.
Contract ABI
Fetch a verified contract's ABI and metadata by address, keylessly, from Sourcify. Returns the ABI plus a summarized list of function and event…
Afriref - Africa reference data
Pan-African official government reference data as cited JSON, every covered country: income and corporate tax, VAT/GST, CPI inflation, central-bank…
Euroref - Europe reference data
European official government reference data as cited JSON, every covered country: income and corporate tax, VAT/GST, CPI inflation, central-bank…
Latamref - LatAm reference data
Latin American official government reference data as cited JSON, every covered country: income and corporate tax, VAT/GST, CPI inflation,…
proxy.0000402.xyz
Pay $0.01 USDC to make an outbound HTTP request through the proxy. Supports all standard HTTP methods, custom headers (including auth), and JSON or…
RemoteSight PDF OCR
OCR a scanned PDF into clean text (Tesseract, English, machine-printed documents). Up to 25 pages per call. PDFs that turn out to have a text layer…
www.oracleinsight.xyz
Pre-trade safety check: oracle-immune-system verdict for one trade, with verifiable EIP-712 attestation support. BLOCK verdicts are complete checks…
x402 Doctor
Is this x402 endpoint safe to pay? Check it before your AI agent pays: go / caution / no_go, the recommended payment option, and why (payment would…
agents.datamancer.io
VIN decode (x402; 402 first, $0.005, Base then Solana)
Pubrio
Returns company details fetched in real time from a LinkedIn company page URL. Each call is 1 credit.
Limitguard
Lead verify for one NL or BE sales lead: is it a real, active company? Checks the KVK or KBO register and cross-checks what the lead holds: VAT with…
deltasignal-mcp-gcp-canary-mhaufviwaq-uc.a.run.app
Deterministic Phase 1 alpha, resilience, treasury-strength, and regime-fit signals for one issuer.
Yield.xyz MCP
Discover DeFi yield opportunities across 80+ networks — 3,300+ staking, lending, vault, and RWA yields from Lido, Aave, Morpho, and more. Filter by…
Mearef - Mid-East reference data
Middle Eastern official government reference data as cited JSON, every covered country: income and corporate tax, VAT/GST, CPI inflation,…
poolproof.ru
Who launched this pump.fun token and what happened to their previous ones: launch count, graduation record, and whether the creator bought their own…
Roast Generator
Pay for a lighthearted developer roast generated on-demand.
Sanctions Screening by nsgoods
Signed multi-chain OFAC SDN address screening (USDC on Base or Solana)
x402 SEO Audit
On-page SEO audit for any live URL. Returns a 0-100 SEO score plus the raw signals behind it: title tag and meta description with their lengths,…
Soren
Every PC game currently free to KEEP (claim once, own permanently) across Steam, Epic Games Store, GOG and itch.io. Each entry verified against that…
Usaref - N America reference
North American official government reference data as cited JSON, every covered country: income and corporate tax, VAT/GST, CPI inflation,…
ArbiPulse
Stablecoin parallel-rate premium — how far the street price of a digital dollar (per-venue USDT quotes) diverges from the official FX rate in…
content.hugen.tokyo
Extract and classify all hyperlinks from a web page — internal vs external using eTLD+1 domain matching. Returns up to 200 internal and 200 external…
midax402.com
MIDAX402: Evidence+ x402 intelligence with expanded corpus retrieval, local risk brief, contradiction scan and concrete action plan. We do not grade…
Stormap
Use when a US stock is moving and the likely cause is needed from primary sources: the last 48h (up to 168h) of SEC filings ranked as catalysts (8-K…
Digital Atom
DIGITAL.ATOM.1 fixture JSON. $0.005 USDC Solana exact.
vending-machine-seven.vercel.app
Current temperature and wind for a city from Open-Meteo (live forecast data)
www.thelatentlounge.com
Paid single-attempt reasoning puzzle for AI agents at The Latent Lounge — infer a hidden string transformation from worked examples, then apply it.…
Eckari
Convert a one-line US street address into coordinates using the US Census Bureau Geocoder. Returns the standardised matched address, latitude and…
Asiaref - Asia reference data
Asian official government reference data as cited JSON, every covered country: income and corporate tax, VAT/GST, CPI inflation, central-bank policy…