x402 paid APIs: MCP servers, A2A agents and x402 APIs

Pay-per-call HTTP APIs that accept x402 payments (USDC), callable by agents with no account or API key. 1223 listings in the Rooms directory, 1213 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.

familyofficeknowledgegraph.ai Live x402
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 rece…
x402 paid API · 1 endpoint
fanfare.run Live x402
All 30 NBA teams with ID, city, abbreviation, conference, and division. Use team IDs to query schedules and standings. (24 paid endpoints on fanfare.run.)
x402 paid API · 12 endpoints
faultcode-diagnostic-mcp.bowling-anthony.workers.dev Live x402
What a vehicle fault code means, with source-attributed generic and make-specific definitions and any disagreement between sources stated.
x402 paid API · 1 endpoint
fenixfoundry.com Live x402
Did it happen? Check whether a prediction market event has settled on Polymarket or Kalshi and get the resolved outcome, resolution time, source and market URL. A cheap oracle for agents that must verify a real-world ou…
x402 paid API · 3 endpoints
fetchdelta.com Live x402
FetchDelta: compare one public web page with its previous stored snapshot. Returns added/removed lines and change previews. The first call creates a baseline; later calls share that URL baseline across buyers. Use page-…
x402 paid API · 2 endpoints
fetch.halowerk.com Live x402
Read the mandatory public disclosure of one domain and return company, postal address, e-mail, phone, VAT and register data with a source for every value. (3 paid endpoints on fetch.halowerk.com.)
x402 paid API · 3 endpoints
fetchharbor.benlab.download Live x402
Fetch one public HTTP(S) URL for research, extraction, or agent workflows. Returns the final URL, upstream status, content type, and decoded content. Private, local, metadata, and reserved destinations are blocked; redi…
x402 paid API · 3 endpoints
ffpipe.dev Live x402
Convert any video to a clean, web-ready MP4. Provide a source URL or upload the file directly; the paid request returns a status URL to poll, and the finished MP4 (plus a thumbnail) is downloadable for 24 hours. Fixed p…
x402 paid API · 3 endpoints
fiatdock.com Live x402
Base latest block number + timestamp — a chain-head freshness probe. Pay-per-call via x402. (105 paid endpoints on fiatdock.com.)
x402 paid API · 12 endpoints
files.camelai.io Live x402
Upload a file and get a temporary signed URL. Send raw file body with Content-Type header. Returns a URL valid for 1 hour.
x402 paid API · 1 endpoint
fileshareforagents.online Live x402
Store JSON or a file (up to 25 MB) privately for 7 days and hand it to a human or another agent with a signed link or a password-protected address. Includes 100 reads. No account needed: pay $0.01 per call here, or use…
x402 paid API · 1 endpoint
finance-api.kdlcfa.workers.dev Live x402
US 30-Year Treasury Bond yield (%), delayed, via Yahoo Finance (8 paid endpoints on finance-api.kdlcfa.workers.dev.)
x402 paid API · 8 endpoints
finance.openverbs.com Live x402
Grow a principal by simple or compound interest over a number of years. Compound interest uses compoundsPerYear compounding periods (default 12, monthly). (6 paid endpoints on finance.openverbs.com.)
x402 paid API · 6 endpoints
finance.toon.haus Live x402
Stock quote with company profile (4 paid endpoints on finance.toon.haus.)
x402 paid API · 4 endpoints
finanz.halowerk.com Live x402
Returns the current fee rates for the usual confirmation targets together with the state of the mempool behind them, and then does the part that is usually missing: it estimates the virtual size of the transaction you d…
x402 paid API · 3 endpoints
flat-rate-llm.kikoribera03.workers.dev Live x402
Generates a 1024x1024 JPEG from a text prompt with FLUX.1 [schnell] in about 2 seconds. Returns a hosted image URL valid for 24 hours that you can hand straight to the next tool; add inline=true to also get the base64.…
x402 paid API · 12 endpoints
flights.use.x402atlas.com Live x402
Flight search by departure and arrival airports in the URL — compare live itineraries, fares, schedules, stops and emissions across airlines, similar to Google Flights, as clean JSON.
x402 paid API · 1 endpoint
flipvo.com Live x402
Cheapest possible paid call: proves your wallet, our 402, and the receipt path work. Returns pong and a timestamp. (13 paid endpoints on api.flipvo.com.)
x402 paid API · 12 endpoints
focxle.com Live x402
Screen untrusted text against known prompt-injection patterns (pattern matching, not a model). Returns which named patterns matched.
x402 paid API · 1 endpoint
forgemesh.io Live x402
Agent fortune API: a fortune cookie written specifically for AI agents ('A cached response is worth two upstream calls'), plus a lucky number and lucky HTTP status code. The cheapest, most delightful way to make your fi…
x402 paid API · 12 endpoints
formwerk.halowerk.com Live x402
Prüft am Objekt skript den Befund vorhandene Feldbeschriftung. (37 paid endpoints on formwerk.halowerk.com.)
x402 paid API · 12 endpoints
fortune.fulinlabs.com Live x402
Random fortune — fixed price, x402 exact
x402 paid API · 1 endpoint
forwardlane.pay.zeroclick.io Live x402
The most recent quality snapshot for the repository. Returns 404 if no snapshot exists. (9 paid endpoints on forwardlane.pay.zeroclick.io.)
x402 paid API · 9 endpoints
foundry-par007-machine-revenue-mainnet.inference-chip-index.workers.dev Live x402
Find recently updated ClinicalTrials.gov study identifiers, titles and registry status for a condition, with the registry processing date. No medical conclusion. (5 paid endpoints on foundry-par007-machine-revenue-mainn…
x402 paid API · 5 endpoints
fracht.halowerk.com Live x402
Separates common bill-of-lading and air-waybill reference components. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values discl…
x402 paid API · 8 endpoints
fraction.openverbs.com Live x402
Reduce a fraction to lowest terms and describe it: numerator/denominator (denominator normalized positive), sign, whether it is an integer, and a mixed-number form when improper. A zero denominator is a clean 400. (4 pa…
x402 paid API · 4 endpoints
freeq.one Live x402
OG Image Generator: Generate an Open Graph social-card image (1200x630 PNG) from a title and description. Returns a base64-encoded image (MCP content type image). Optional image URL embeds a header graphic. Title trunca…
x402 paid API · 12 endpoints
freestylevault.com Live x402
Committed IFTA tax rates for a quarter (?quarter=2026-Q2&fuel_type=diesel&jurisdiction=WA), grouped by jurisdiction × fuel type with effective periods clipped to the quarter — mid-quarter revisions read as separate peri…
x402 paid API · 1 endpoint
fronterasignal.com Live x402
Use to check what common building materials cost on the shelf in the Rio Grande Valley (McAllen, Mission, Edinburg): 2x4 and 2x6 studs, OSB, drywall, concrete mix, CMU block, rebar, shingles, underlayment, housewrap, in…
x402 paid API · 12 endpoints
FuelScout Live A2A
Machine-payable cheapest-fuel queries over x402. Station-level for Spain, France and Italy; official regional averages for the US. Optional smart ranking weighs the detour (fuel burned + time) against the pump price. Pr…
A2A agent · FuelScout · 3 skills
fullstack.cash Live x402
Access to protected psf-bch-api resources (0.001 USDC)
x402 paid API · 1 endpoint
furigana.agentic-jp.com Live x402
Convert kanji-mixed Japanese (JP) text to hiragana, katakana, or romaji (Hepburn/Nippon/Passport), with a per-token breakdown of surface form, reading, and part-of-speech. Backed by the kuromoji morphological analyzer.…
x402 paid API · 3 endpoints
gamemaxxing.baes.so Live x402
Search GAMEMAXXING's video games and gaming knowledge base for game concepts across game design, game business, game culture, and gaming history, then return ranked JSON hits with full content first and source URLs seco…
x402 paid API · 1 endpoint
Gapup MCP — 270+ Agent-payable AI Tools Live MCP
270+ agent-payable C-suite expertises (competitive intel, SEC filings, sanctions multi-jurisdiction, KYC, pentest scope, clinical evidence GRADE-graded, real-estate deals EU-first, ESG, NAICS classifier, patent landscap…
MCP server · getgapup
gas.apitoll.cloud Live x402
Base gas oracle / gas price API for AI agents and bots — get the gas price for a transaction on Base in one x402 call. Real-time slow/standard/fast EIP-1559 fee tiers from a live eth_feeHistory call, returned as DROP-IN…
x402 paid API · 1 endpoint
GateCheck by LarryBuildsAI Live MCP
One-cent x402 and MCP readiness checks plus fixed-price marketplace launch packs.
MCP server · io.github.LarryLemonBot
gblin-sentinel.vercel.app Live x402
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…
x402 paid API · 4 endpoints
gblin.digital Live x402
Call before your agent trades, rebalances or moves capital: is the crypto market calm, elevated or in a crash regime right now? Returns a 10-minute, EIP-712-signed risk attestation for BTC and ETH computed from Chainlin…
x402 paid API · 5 endpoints
gdelt.use.x402atlas.com Live x402
Global news article search by GDELT — normalized fulltext search across worldwide media (query syntax: phrases, OR, sourcecountry, theme, tone) returned as a clean snake_case envelope. (2 paid endpoints on gdelt.use.x40…
x402 paid API · 2 endpoints
geld-machen-x402.fly.dev Live x402
JSON micro-tool for agents: GET ?url= (or POST url / image_base64) → local Tesseract OCR (English-first): text, word_count, confidence, width/height, fetched_at, timing_ms. COGS=0 — no upstream OCR API key. Demand-match…
x402 paid API · 4 endpoints
Genesis402 by UnyKorn (x402 pay-per-call) Live MCP
Counterparty checks, sanctions screening, company lookup and 360+ pay-per-call APIs over x402.
MCP server · io.github.FTHTrading
geo.halowerk.com Live x402
Creates or inspects H3 cells and optionally returns neighbors or changes resolution. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-back…
x402 paid API · 10 endpoints
geoip.bip-rep.com Live x402
Resolve any public IPv4/IPv6 address (or hostname) to geolocation for analytics, fraud, and ops agents. Returns ISO country code, region, city, IANA timezone, latitude/longitude, EU membership flag, and the matched netw…
x402 paid API · 1 endpoint
geometry.openverbs.com Live x402
Diameter, circumference and area of a circle from its radius. (5 paid endpoints on geometry.openverbs.com.)
x402 paid API · 5 endpoints
geoprimitives.dev Live x402
Give it a longitude and latitude and it answers with the IANA timezone identifier (America/New_York), the UTC offset in force there right now, whether daylight saving is currently in effect and by how much, the local wa…
x402 paid API · 3 endpoints
geospatial.openverbs.com Live x402
Convert decimal lat/lon to a UTM coordinate (zone, latitude band, hemisphere, easting, northing) on WGS84, including the Norway/Svalbard zone exceptions. Defined for latitudes -80..84. (15 paid endpoints on geospatial.o…
x402 paid API · 12 endpoints
getbags.app Live x402
BAGS Agent API index — machine-readable directory of the agentic payment API, MCP server, and x402 payment surface. (4 paid endpoints on www.getbags.app.)
x402 paid API · 4 endpoints
getplexa.com Live x402
Plexa /v1/quote — executable swap quote: the realizable fill price at your trade size, not a mid/spot price feed. Returns price impact (bps), worst-case slippage, depth and the per-leg route across Base/Polygon/Arbitrum…
x402 paid API · 4 endpoints

Related capabilities

On-chain data Trading & markets AI models & inference Agent infrastructure Maps & travel Research Security & trust Web scraping

How to use one

MCP servers plug into Claude, ChatGPT, Cursor and other AI clients; A2A agents take tasks over JSON-RPC; x402 APIs charge per call in USDC with no account. Guides: A2A vs MCP · How to call an A2A agent · x402 for agents.

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