Coding & dev tools: MCP servers, A2A agents and x402 APIs

• gitBeacon API Live x402

  gitBeacon — GitHub trend intelligence for AI agents. A daily scan of trending new GitHub repos, LLM-analyzed into a structured digest (title, summary, top categories, language trends, emerging tools, notable projects, a…

  x402 paid API · 1 endpoint · check 90/100

• robinx.io Live x402

  Live scored launch feed (realtime) — or add ?tier=free for the 10-min-delayed free feed, or ?tier=alpha ($0.02) for caller_signal enrichment (10 paid endpoints on api.robinx.io.)

  x402 paid API · 10 endpoints · check 90/100

• Web Search & Data API (kadec0) Live x402

  Pay-per-call web search and web data for AI agents. Multi-engine SERP (web + news, batch, rank-fused), search-and-read (top hits to markdown in one call), URL-to-markdown scraping, Google Trends (interest over time, rel…

  x402 paid API · 12 endpoints · check 90/100

• datastand.dev Live x402

  Cost-optimised endpoint selection: name a capability (web search, token safety, enrichment) and get the x402 endpoints that provide it ranked cheapest-first in USDC per call, with adoption stats. Refreshed daily from th…

  x402 paid API · 10 endpoints · check 88/100

• mini-tollbooth.onrender.com Live x402

  Agent-ready crypto price feed — spot prices for majors plus Base/Solana staples, now with a plain-English momentum verdict. No API key needed. Toll: $0.005 USDC on Base or Solana. (58 paid endpoints on mini-tollbooth.on…

  x402 paid API · 12 endpoints · check 88/100

• verdixapi.com Live x402

  Verdix standard ($0.10): call before larger or repeated payments to an EVM address on Base, when an address-age read is not enough. Sanctions, scam/phishing lists, address poisoning and contract/deployer signals, plus o…

  x402 paid API · 5 endpoints · check 88/100

• x402-doctor.onrender.com Live x402

  Why is my x402 endpoint broken? Diagnose and debug an x402 payment endpoint (or MCP server) when payments fail: checks the 402 challenge, accepts[] (network, payTo, amount, asset), resource URL, Solana settlement readin…

  x402 paid API · 3 endpoints · check 44/100

• abi.cyberwarex.com Live x402

  Fetch a verified contract's ABI and metadata by address, keylessly, from Sourcify. Returns the ABI plus a summarized list of function and event signatures, the contract name and compiler, and proxy detection (is_proxy +…

  x402 paid API · 1 endpoint

• agentbodega.store Live x402

  Check GitHub's official status source for current incidents, component health, and scheduled maintenance before an agent retries, deploys, or escalates. (7 paid endpoints on agentbodega.store.)

  x402 paid API · 7 endpoints

• agents.forwardlane.com Live x402

  Searches repository names and properties. Returns a paginated envelope with items, total, page, page_size, and total_pages, sorted by composite score. (25 paid endpoints on agents.forwardlane.com.)

  x402 paid API · 12 endpoints

• agents.supremeai.ca Live x402

  Look up a GitHub repository: stars, forks, open issues, primary language, license, default branch, topics, and last push time. One call, structured JSON. For open-source vetting, competitive analysis, and tracking proje…

  x402 paid API · 3 endpoints

• aventtech.com Live x402

  QR code generation returning clean scalable SVG: any text/URL up to 1800 chars, selectable error-correction level (L/M/Q/H). (21 paid endpoints on api.aventtech.com.)

  x402 paid API · 12 endpoints

• data.greeneris.io Live x402

  Hourly weather forecast for any point on Earth from Open-Meteo (blend of ECMWF/GFS/ICON models, refreshed hourly; data CC-BY 4.0). Query: ?latitude=48.8566&longitude=2.3522&hourly=temperature_2m,precipitation,wind_speed…

  x402 paid API · 12 endpoints

• eltociear-skill-audit.hf.space Live x402

  Fetch a URL and grade its HTTP security headers (HSTS, CSP, X-Frame-Options, etc.) (14 paid endpoints on eltociear-skill-audit.hf.space.)

  x402 paid API · 12 endpoints

• exende.dev Live x402

  Create a temporary public webhook endpoint for AI agents and automated workflows that need to receive asynchronous callbacks from external services. Returns a callback URL plus read and wait endpoints. No server deploym…

  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

• http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run Live x402

  Detect material public DNS answer changes with a deterministic hash. TTL-only changes do not count and no arbitrary resolver or AXFR operation is exposed. Base mainnet USDC (95 paid endpoints on http--forest-gas-station…

  x402 paid API · 12 endpoints

• markdown.openverbs.com Live x402

  Extract the heading outline from Markdown — depth, text and a unique GitHub-style anchor slug for each heading. Optionally limit to a maximum heading depth. (3 paid endpoints on markdown.openverbs.com.)

  x402 paid API · 3 endpoints

• medien.halowerk.com Live x402

  Takes two documents, by URL, inline base64 or raw text, extracts the text of each and compares them. Paragraphs are the unit: the answer lists every block that was removed, added, or kept but reworded, and for reworded…

  x402 paid API · 12 endpoints

• money-agent-production-736f.up.railway.app Live x402

  Call when you need the text of one public http(s) page. Required query url. SSRF-gated. Not a search engine and not a GitHub clone.

  x402 paid API · 1 endpoint

• poolproof.ru Live x402

  Yield pool safety: peg of every underlying asset, yield sustainability, emission dependence, exit depth (9 paid endpoints on poolproof.ru.)

  x402 paid API · 9 endpoints

• scan.openverbs.com Live x402

  Scan source code or configuration text for hardcoded secrets: AWS access keys, GitHub/Slack/Google tokens, Stripe and OpenAI keys, PEM private-key blocks, JWTs and high-entropy secret assignments. Placeholder values are…

  x402 paid API · 4 endpoints

• scout.hugen.tokyo Live x402

  11-source parallel intelligence report in one call — HN, GitHub, npm, PyPI, Dev.to, Hashnode, Lobsters, StackExchange, ArXiv, Semantic Scholar, GitLab. Best ROI on Bazaar. AI agent API for market research. Accepts USDC…

  x402 paid API · 12 endpoints

• stablesocial.dev Live x402

  Scrape Creators · Google — Company Ads (48 paid endpoints on stablesocial.dev.)

  x402 paid API · 12 endpoints

• vrsai.tech Live x402

  Check an exact npm or PyPI package version immediately before installation using current registry, vulnerability, malicious-package, withdrawal/deprecation, and verified provenance evidence. Returns ALLOW, REVIEW, BLOCK…

  x402 paid API · 1 endpoint

• webbersites.com Live x402

  ANTHROPIC-COMPATIBLE /v1/messages — Claude Haiku 4.5 through the exact Anthropic API dialect: same request/response shape, no Anthropic account, the x402 payment IS the auth. Point an Anthropic SDK's base_url at https:/…

  x402 paid API · 12 endpoints

• 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

• 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

• 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

Related capabilities

x402 paid APIsOn-chain dataAI models & inferenceAgent infrastructureSecurity & trustWeb scrapingResearchEmail

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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