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

• x402-tollbooth.onrender.com Live x402

  Check whether email addresses are real and safe to send to. Verifies up to 25 addresses per call: syntax, domain MX/A record (including null-MX), disposable-domain, role-account, free-provider and typo checks. Does not…

  x402 paid API · 2 endpoints

• x402-tools.vercel.app Live x402

  Search for upcoming concerts. Supports city, date range, genre, and artist filtering. (2 paid endpoints on x402-tools.vercel.app.)

  x402 paid API · 2 endpoints

• x402-trends-server.onrender.com Live x402

  Scrape a public webpage and extract clean readable text. Use this web scraping endpoint when an AI agent needs page content for summarization, research, retrieval, content extraction, indexing, or downstream analysis wi…

  x402 paid API · 4 endpoints

• x402-url-extractor-production.up.railway.app Live x402

  Extract a public HTTP(S) page into JSON: title, description, JSON-LD, Open Graph, headings, links, and AI-readiness signals. No JavaScript; 12-second timeout; 3 MB cap. Paid JSON keeps requestedUrl, finalUrl, status, so…

  x402 paid API · 1 endpoint

• x402agentic.ai Live x402

  Per-agent budget enforcement — track an agent's cumulative spend against a cap and block overspend. Part of x402 Agentic, the payment-trust suite for AI agents on Base USDC.

  x402 paid API · 1 endpoint

• x402check.xyz Live x402

  Check a counterparty before paying: OFAC SDN, phishing and drainer feeds, a live watch of drainer infrastructure, transaction simulation and injected-instruction analysis. Returns a score and a signed ES256 attestation.…

  x402 paid API · 2 endpoints

• x402financialdata.com Live x402

  Real crypto market data in one batched call: price, market cap, market-cap rank, 24h volume/high/low/change, circulating/total/max supply, and all-time-high with date -- for BTC, ETH, SOL, and 17+ other major coins by t…

  x402 paid API · 12 endpoints

• x402joker.com Live x402

  Pay-per-joke vending machine: send USDC, get a fresh Claude-generated joke. Optional "theme" picks the topic.

  x402 paid API · 1 endpoint

• x402lifeadvice.vercel.app Live x402

  Get one piece of thoughtful life advice, paid per request over x402.

  x402 paid API · 1 endpoint

• x402stock.pay.zeroclick.io Live x402

  Get the latest available price for any US-listed stock: the most recent 1-minute bar close plus today's OHLCV, change, and previous close. Currently 15 minutes delayed; each response carries `is_delayed: true`. Real-tim…

  x402 paid API · 3 endpoints

• x402stock.vercel.app Live x402

  Reference list of US equity exchanges and market centers with names, MICs, operating MICs, and SIP participant IDs. From x402stock, a pay-per-call market & economic data API for AI agents. No API key or account; pay in…

  x402 paid API · 5 endpoints

• x402stock.xyz Live x402

  The daily US Treasury par yield curve (Constant Maturity Treasury rates) for every maturity from 1 month to 30 years, in percent. Defaults to the latest published day; pass `?limit=` for more recent days (max 250) and `…

  x402 paid API · 12 endpoints

• x402swag.com Live x402

  x402swag.com — merch store for AI agents and builders. T-shirts, stickers, mugs and custom print-on-demand designs. Full catalog with prices, variants and the exact buy flow in one call.

  x402 paid API · 1 endpoint

• x402uselessfacts.vercel.app Live x402

  Pay a tiny amount of USDC and receive one delightfully useless fact.

  x402 paid API · 1 endpoint

• x402wordoftheday.vercel.app Live x402

  Get today's curated Word of the Day (definition + part of speech).

  x402 paid API · 1 endpoint

• xfuel.app Live x402

  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…

  x402 paid API · 1 endpoint

• xmedia.use.x402atlas.com Live x402

  Twitter (X) video & image downloader — pass a public tweet / X post URL, get direct CDN media links: .mp4 video URLs with thumbnails plus every image in the post, ready to stream, embed, re-host, or download. No scrapin…

  x402 paid API · 1 endpoint

• xynaptic.io Live x402

  Xynaptic Asia News v2 — structured events across Asia (China, Japan, India, Korea, ASEAN, last 3h): importance, lifecycle, entities, sectors, multi-source verification, agent-ready actions. Refreshed every 2 hours. (148…

  x402 paid API · 12 endpoints

• yield.trdefi.com Live x402

  TRDEFI prepare request (2 paid endpoints on yield.trdefi.com.)

  x402 paid API · 2 endpoints

• youtube.use.x402atlas.com Live x402

  Full transcript of any YouTube video by video id or URL: captions/subtitles as clean plain text plus timestamped segments, the video's chapter markers, and every caption track it offers so an agent can pick a language a…

  x402 paid API · 1 endpoint

• zaref.dev Live x402

  Which South African reference series changed or were reconfirmed since a given date. The cheap cache-freshness check for agents. Optional param: since=YYYY-MM-DD (defaults to the last 30 days). (5 paid endpoints on zare…

  x402 paid API · 5 endpoints

• zeroworker-web-action-api.zeroworker-lab.workers.dev Live x402

  Avoid unnecessary browser launches with a lightweight preflight for AI agents. ZeroWorker inspects public pages before browser automation and returns static forms, field constraints, CAPTCHA/SPA signals, DNS/public-netw…

  x402 paid API · 1 endpoint

• zfinia.com Live x402

  Fetch a reviewed public page and return its title, every meta and Open Graph tag, and the canonical URL. No JavaScript is executed and no script content is read. Returns the licence and creator for the content alongside…

  x402 paid API · 12 endpoints

• zoll.halowerk.com Live x402

  Matches declared classification tokens against a supplied published dual-use control list. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; sourc…

  x402 paid API · 8 endpoints

• zoningverdict.com Live x402

  Address-to-zoning lookup for published municipalities. Coverage: 64 municipalities in 6 states. Resolves a street address to supported municipality and, where GIS is verified, zoning district_code with lookup method. Po…

  x402 paid API · 1 endpoint

• ClawFetch x402

  ClawFetch turns the open web into agent-ready data: stealth page fetching, headless JS rendering, structured extraction from 17 specialized sites (Twitter/X, GitHub, CoinGecko, Hacker News, YouTube, Wikipedia, npm, PyPI…

  x402 paid API · 8 endpoints · check 90/100

• Cult OS x402

  Paid developer services for humans and agents on Base, with selected services on Arc, and Solana USDC for toolkit services, developer tools and signal feeds. Use live HTTP 402 terms before payment.

  x402 paid API · 12 endpoints · check 90/100

• Driftflight x402

  AI image generation with style presets: production-quality text-to-image for campaigns, catalogs, and editorial. Three tiers (sketch, studio, gallery), commercial licence and C2PA credentials on every render. This serve…

  x402 paid API · 12 endpoints · check 90/100

• Exa x402

  Search API for AI agents that need real-time web data, deep research, and structured content from one endpoint. Try our API for free.

  x402 paid API · 2 endpoints · check 90/100

• glim.sh x402

  One remote endpoint gives your agent live data from Twitter, Reddit, the open web, GitHub and more. No API keys, no scraping stack - just connect the URL and go.

  x402 paid API · 12 endpoints · check 90/100

• Spraay x402 Gateway x402

  Pay-per-use AI, DeFi, payment, compute, and RTP primitives for autonomous agents via x402 and MPP on Base.

  x402 paid API · 12 endpoints · check 90/100

• Surplus Intelligence x402

  Buy the cheapest inference. Sell your credits. The open order book for AI models. Up to 90% off Claude Opus 5.5, GPT 6 Astra, and more.

  x402 paid API · 1 endpoint · check 90/100

• Browserbase x402

  Pay-per-use browser sessions with crypto. No API keys, no accounts -- just pay and connect via x402 or MPP.

  x402 paid API · 8 endpoints · check 87/100

• AgentHub by Allium x402

  150+ chains, in any AI client. Install the Allium MCP server, skill, or CLI in one command — or skip the API key entirely and pay per query in USDC.

  x402 paid API · 2 endpoints · check 80/100

• Tavily x402

  Pay-per-request Tavily web search over the x402 protocol.

  x402 paid API · 1 endpoint · check 39/100

Related capabilities

On-chain dataTrading & marketsAI models & inferenceMaps & travelResearchAgent infrastructureSecurity & trustCrypto 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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