Payments: MCP servers, A2A agents and x402 APIs

• Bitrefill x402 Live x402

  Buy gift cards, eSIMs, mobile top-ups and prepaid cards with USDC via x402. 10,000+ brands across 180+ countries. No API keys or Bitrefill account required — wallet payment and optional SIWX sign-in only.

  x402 paid API · 8 endpoints · check 90/100

• CheapTokens API Live x402

  Machine-readable API for discovering CheapTokens pricing/supply, choosing x402 or card checkout routes, purchasing discounted Venice.ai API credits, inspecting Same-Day and Prepaid API Key status, recovering card-purcha…

  x402 paid API · 1 endpoint · check 90/100

• agentline.cloud Live x402

  AgentLine gives AI agents real US phone numbers, inbound/outbound voice calls, AI receptionists, transcripts, inbound SMS and live phone events. Use REST or MCP without signup: recharge and save agent_token. This endpoi…

  x402 paid API · 1 endpoint

• compliancepulse.theaslangroupllc.com Live x402

  Is this EU VAT number valid? Live VIES check against the European Commission's official VAT Information Exchange System — validate a European VAT id, verify a business tax id before invoicing, confirm B2B reverse-charge…

  x402 paid API · 2 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

• handel.halowerk.com Live x402

  Takes a warehouse as a table and returns a placement. You supply the storage locations with their walking distance to the pick-and-drop point and, where they exist, their weight and volume limits; you supply the SKUs wi…

  x402 paid API · 12 endpoints

• invoket.com Live x402

  Before your agent advises on EU compliance or cites EU law: check an act or article is in force at a given date, by CELEX or ELI identifier — consolidated text, status, validity dates and the staggered date it becomes A…

  x402 paid API · 12 endpoints

• lab.paidapis.net Live x402

  Aggregated market snapshot: Ethereum mainnet gas price (Gwei), ETH/USD spot price, and the latest Base mainnet block number and timestamp — combined into one call. Optional ?ref=<address> pays that wallet a 20% referral…

  x402 paid API · 7 endpoints

• ozdreamtools.de Live x402

  Audits a website for AI agent and AI crawler readiness from caller-supplied inputs: robots.txt, HTML, headers, llms.txt, sitemap lastmod, /.well-known. Names the policy per AI token (GPTBot, OAI-SearchBot, ChatGPT-User,…

  x402 paid API · 12 endpoints

• payload402.edgebytenet.workers.dev Live x402

  Convert amounts between ISO 4217 currencies using ECB daily reference rates (Frankfurter). Use for invoices, travel budgets, expense reports, and shopping comparisons when you need a verifiable rate instead of LLM arith…

  x402 paid API · 4 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

• sweetai.tiamatcrypto.com Live x402

  Decide whether to pay an AI agent: PAY/CAUTION/SKIP verdict with expected loss in USDC before you send money to an unknown agent (18 paid endpoints on sweetai.tiamatcrypto.com.)

  x402 paid API · 12 endpoints

• torii-gateway-production.ichis-lab.workers.dev Live x402

  Tell whether a given date is a Japanese business day. Japanese national holidays and business-day calculations derived from the Cabinet Office official CSV. Returns holidays for a given year, plus business-day arithmeti…

  x402 paid API · 1 endpoint

• transitpulse.theaslangroupllc.com Live x402

  Rail/coach/ferry/cruise compensation eligibility — UK Delay Repay, EU Rail 2021/782 (25/50%), EU/UK ferry 1177/2010, EU coach 181/2011, US FMC cruise refunds (46 CFR 540, 3-day rule), Athens Convention ship baggage — pl…

  x402 paid API · 1 endpoint

• trust-agent.io Live x402

  Sanctions screening for a crypto wallet before you pay it: checks the address, and an agent's owner and payout wallet, against OFAC SDN-listed EVM addresses, then returns a 0-100 trust score, risk band and proceed / hol…

  x402 paid API · 11 endpoints

• u2a.com.au Live x402

  Find the right Web3 product for trading, perps, quests, or bridging using queries such as “perp DEX”, “bridge ETH to Base”, “Galxe quests” or “Banana Gun”. Get the best-matching product, supported networks, user perks,…

  x402 paid API · 7 endpoints

Related capabilities

x402 paid APIsFinance & accountingOn-chain dataAgent infrastructureE-commerceAI models & inferenceTrading & marketsResearch

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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