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.

keyronne.com Live x402
Compute cryptographic digests and HMACs deterministically: MD5, SHA-1, SHA-256, SHA-384, SHA-512, output as hex, base64, or base64url. Add a "key" for HMAC. Built for checksums, content addressing, and signature verific…
x402 paid API · 12 endpoints
kgninja.dev Live x402
KG-NINJA Agent Error Fix Receipt (2 paid endpoints on api.kgninja.dev.)
x402 paid API · 2 endpoints
Kifly — Agentic Commerce & Payments Live MCP
Multi-seller shopping for AI agents. Settle via Stripe MPP or x402 USDC on Base. Hosted.
MCP server · ai.kifly
kino402.com Live x402
UGC product video prompt: the compiled prompt and render plan for a 5s 9:16 energetic spot on seedance-1.5-pro (9 paid endpoints on kino402.com.)
x402 paid API · 9 endpoints
klima.halowerk.com Live x402
Selects and applies a supplied published CBAM default factor for a goods group. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed va…
x402 paid API · 3 endpoints
klimalabs.com Live x402
Entry point to the x402 Carbon Retirement API on Base. Returns every endpoint you need plus a live snapshot of the top 3 carbon classes and marketplace listings by liquidity. Discover, quote and certificate are free. Re…
x402 paid API · 1 endpoint
kr-cm-kg.ai Live x402
One paid call on kr-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…
x402 paid API · 1 endpoint
kronossignals.com Live x402
Crypto funding-rate extremes screener: scans all 17 perpetual futures markets (BTC/ETH/SOL/BNB/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/TRX/BCH/ATOM/NEAR/APT/HYPE). Uses z-score (30-day baseline) to identify statistically extreme…
x402 paid API · 12 endpoints
kyp-model.ai Live x402
One paid call on kyp-model.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…
x402 paid API · 1 endpoint
labor.lonestaroracle.xyz Live x402
US labor-market signal (jobs, unemployment, wages, JOLTS)
x402 paid API · 1 endpoint
ladyfortunalx402.vercel.app Live x402
Get a random fortune via x402 payment on Base mainnet.
x402 paid API · 1 endpoint
lastlookdata.com Live x402
LastLook Data — current 30-year US Treasury yield (DGS30). Alias for /api/current?id=DGS30. (4 paid endpoints on api.lastlookdata.com.)
x402 paid API · 4 endpoints
latitude10.tech Live x402
Meridian: a design system for SaaS products people use all day: admin consoles, CRMs and internal tools. Calm, neutral and precise: Manrope headlines over Inter, Meridian Teal with one Burnt Amber accent, tone rather th…
x402 paid API · 2 endpoints
lauf.halowerk.com Live x402
Loads a public https page, finds the requested form, fills your values into it in a real headless browser and reports what a submission would run into — without submitting. Each field is checked against what the page it…
x402 paid API · 7 endpoints
launches.lonestaroracle.xyz Live x402
New token launch scanner — Base and EVM chains, real-time pool data
x402 paid API · 1 endpoint
Lead Enrichment API Live MCP
Curated EU AI/Sec/DevTools/Fintech B2B leads, Claude-scored. MCP+x402. Free 250/mo.
MCP server · io.github.Compuute
leetspeak-translator.underscoredone.com Live x402
Takes a piece of text and either turns it into leetspeak (swapping some letters for numbers and symbols, like 'hello' becoming 'h3110') or turns leetspeak back into normal, easy-to-read words. The same words always prod…
x402 paid API · 1 endpoint
LEGIT (GONNA) Live A2A
LEGIT is the trust oracle for the x402 agentic economy: measured trust scores and organic demand intelligence for merchants across 20 chains. The leaderboard is free; compare and arena verdicts are paid per call in USDC…
A2A agent · GONNA · 6 skills
lemonade-stand.pt Live x402
A vegan lemonade: lemons, water and ice, served as an illustrated collectible card: a 400x560 SVG image of a cold glass of lemonade with a straw. One GET request, no input; returns the card as image/svg+xml. (4 paid end…
x402 paid API · 4 endpoints
library.forgemesh.io Live x402
Deterministic daily book pick from the indexed corpus, date-seeded so every caller gets the same answer on the same day. Optional date override for backfill. Returns book_id and drill-down routes. No license, no API key…
x402 paid API · 6 endpoints
library.proofivy.com Live x402
Get list of all available CryptoSlate content URLs with their last updated dates (4 paid endpoints on library.proofivy.com.)
x402 paid API · 4 endpoints
linkedpanda.com Live x402
LinkedIn profile search results page (10 paid endpoints on api.linkedpanda.com.)
x402 paid API · 10 endpoints
linklens-sand.vercel.app Live x402
Extract metadata and readable text from a public URL.
x402 paid API · 1 endpoint
Liquid Agent Live MCP
Money tools for AI agents over x402: USDC bridge to 16 chains, Polymarket data, stocks, USDC gas.
MCP server · ai.liquidagent.api
liquidstate.tech Live x402
Decision Leg invalidations. Per-call USDC. (2 paid endpoints on www.liquidstate.tech.)
x402 paid API · 2 endpoints
liquita-x402-edge.liquita.workers.dev Live x402
Real-time at-risk DeFi borrowers across Aave V3, Morpho, Comet, Euler V2, Fluid, Moonwell, Spark on 11 EVM chains. Returns health factor, collateral, debt, and protocol. Updated every 5 minutes from the liquita liquidat…
x402 paid API · 2 endpoints
locus.report Live x402
Returns cited land use, acreage, year built and legal jurisdiction for an address or jurisdiction-scoped parcel id. Returns the same records as locus_parcel_lookup. Use this when your client can only call paid x402 rout…
x402 paid API · 2 endpoints
long.events Live x402
LONG Events events API: global electronic-music event discovery with structured artists. Actions: discover, list, stats, catalog_stats, spotlight_candidates, get_sets, get_now_playing, get_schedule, search_artists, get_…
x402 paid API · 2 endpoints
longwatch.dev Live x402
This-session snapshot only — no watch, no cursor. Use when you will not come back. Required by type: url/rss/x402 need url; price needs coin plus above, below, or move_pct_24h; edgar needs ticker or cik. 8-K items are d…
x402 paid API · 1 endpoint
losbeto.xyz Live x402
LLM inference as a pay-per-call commodity — ask anything (?q=...) and get the first live answer from a multi-provider failover chain (Groq, Gemini, paid tiers when configured). One flat price, any subject, no API keys..…
x402 paid API · 12 endpoints
lotusnetworkapi.com Live x402
Read-only Base L2 gas conditions computed directly from chain data: current base fee, recent percentiles, realised volatility, congestion state, and an 80% forecast range for a chosen horizon. This is supporting context…
x402 paid API · 1 endpoint
LUMEN B2B Agent Live A2A
Global seller-side B2B sourcing, commercial-intelligence and corporate-travel brokerage agent for AI agents and business systems. Use LUMEN for supplier verification, RFQ and quotation review, tender discovery, supplier…
A2A agent · LUMEN B2B · 12 skills
Lumière PayCheck Live MCP
Check any x402 endpoint before your AI agent pays it: trust grade, verdict, and hijack checks.
MCP server · io.github.Book0fEli
LVL LTD Agent Skill Market Live A2A
Live x402 skill market for autonomous agents and humans. Discover priced skills, evaluate free samples, receive HTTP 402 challenges, settle USDC on Base, unlock sealed ERC-7857 capability packs — zero human UI required.
A2A agent · LVL LTD CO · 2 skills
m2msentinel.com Live x402
How deep is liquidity for tracked Base tokens and how much is actually trading, with the source named, for sizing an order or declining one. (3 paid endpoints on api.m2msentinel.com.)
x402 paid API · 3 endpoints
macaddress.openverbs.com Live x402
Generate a random EUI-48 MAC address. By default it is locally-administered and unicast (safe for testing); set `local:false` for a universal-bit address or `multicast:true` for a group address. (5 paid endpoints on mac…
x402 paid API · 5 endpoints
macaroonnetwork.com Live x402
Discover which Macaroon Network service, endpoint, or data product to call next. Searches Macaroon's own published catalogue -- title, category, description, price, and trust evidence metadata -- and returns a short, so…
x402 paid API · 12 endpoints
machina.pay.zeroclick.io Live x402
Tournament fixtures, filterable by team, opponent, and date range. (4 paid endpoints on machina.pay.zeroclick.io.)
x402 paid API · 4 endpoints
machine-commerce-lab.machinecommercelab.workers.dev Live x402
Read-only public DNS lookup report (2 paid endpoints on machine-commerce-lab.machinecommercelab.workers.dev.)
x402 paid API · 2 endpoints
macropulse.theaslangroupllc.com Live x402
Is the stock market open right now? Deterministic market-status and trading-hours for the major global exchanges — NYSE, NASDAQ, LSE, Xetra, Euronext, TSE/JPX, HKEX, SSE, ASX, TSX, SIX, NSE/BSE. Returns is_open plus why…
x402 paid API · 2 endpoints
madoromi.fun Live x402
Japanese dream-interpretation agent API. Returns a Gemini-generated full interpretation from madoromi's curated dream-motif knowledge base (result schema agent-dream-insight.full.v1). Japanese output only. Dream text is…
x402 paid API · 1 endpoint
magentlab.com Live x402
Robinson 2011 Table 3 pCANRISK (not eCANRISK). Age 0/7/13/15; male 6; BMI 0/4/9/14; waist 0/4/6 by sex; inactivity 1; no daily fruit/veg 2; high BP 4; high glucose 14; macrosomia 1 (women); family first-degree categorie…
x402 paid API · 12 endpoints
mailcheck.hugen.tokyo Live x402
MX record lookup for any domain — returns whether mail servers exist and their hostnames sorted by priority. Verify email deliverability before sending. Supports all TLDs including ccTLDs and new gTLDs. No DNS library s…
x402 paid API · 3 endpoints
mailcheck.netzhandwerker.de Live x402
DNS and list based verification. Never claims that a mailbox exists without evidence: without an SMTP probe the verdict for a routable address is "unknown", not "valid".
x402 paid API · 1 endpoint
mail.halowerk.com Live x402
DNS and list based verification. Never claims that a mailbox exists without evidence: without an SMTP probe the verdict for a routable address is "unknown", not "valid". (2 paid endpoints on mail.halowerk.com.)
x402 paid API · 2 endpoints
mailpulse.theaslangroupllc.com Live x402
Check the status and tracking of a physical letter previously sent via POST /api/letters. Returns render status, expected delivery date, and (for certified mail) the USPS tracking number. (2 paid endpoints on mailpulse.…
x402 paid API · 2 endpoints
MandateShield Payment Authority Agent Live A2A
Provides strict cryptographic reservation of AI-agent payment authority and a separate non-executable policy-analysis path. This agent interface exposes no PROCESSOR transition, permit redemption or provider-submission…
A2A agent · MandateShield · 3 skills
maraventanoindex.com Live x402
Per-call counterparty lookup. Pass ?ua=<counterparty-UA>. Returns ONE signed row: has_record (yes/no), payment-attached count, settlement count, class, verdict (known_payer | probe_only | low_signal | unknown), with Ed2…
x402 paid API · 1 endpoint

Related capabilities

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

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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