{"uid":"cap_no23oxvdY12iT-aGAJ5Z1","slug":"x402-gateway-pay-per-call-mcp-on-base-via-coinbase-cdp-x402-f98eb185","name":"x402-gateway — Pay-per-call MCP on Base via Coinbase CDP x402","description":"21 tools. Pay per call. No accounts. No logins. No API keys. Blockchain data, web scraping, ZK proofs, QR & diagram rendering, LLM chat, gift cards — settled in USDC on Base via the x402 payment protocol and Coinbase CDP facilitator.","url":"https://x402.freeq.one/tools","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","description":"JSON request body. See GET /tools for the parameter catalog."},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"toolName":{"type":"string"},"transport":{"type":"string"},"description":{"type":"string"},"queryParams":{"type":"object","additionalProperties":{"type":"string"}},"mcpServerUrl":{"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object","properties":{"result":{"description":"Tool output (JSON)"}}}}}}},"responseSchema":{"type":"json"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_fPLAuFloILjofh2YWnqvL","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"A pay-per-use MCP gateway exposing 15 tools (including markdown, token prices, wallet portfolio, whale alerts, and more) over the x402 payment protocol on Base, requiring no accounts, logins, or API keys.","exampleAgentPrompt":"Use the x402 pay-per-call gateway to fetch the current price of ETH — no API key needed, just pay $0.001 USDC per call via the x402 protocol on Base.","exampleUseCases":[{"title":"Crypto token price lookup","prompt":"Fetch the current price of SOL using the x402 gateway — I want to pay per call in USDC without setting up an account."},{"title":"Wallet portfolio check","prompt":"Pull the full portfolio breakdown for my wallet address 0xABC123... using the x402 pay-per-use gateway on Base."},{"title":"Whale alert monitoring","prompt":"Get the latest whale alert data for large BTC transfers using the x402 gateway — just charge me $0.001 USDC per query, no subscription needed."}],"resultDescription":"Returns a JSON object containing the structured output of the invoked tool — e.g. token prices, wallet balances, whale alerts, rendered markdown, generated images, or verification results, depending on which of the 15 tools was called.","failureModes":["Insufficient USDC balance causes payment failure and 402 response","Invalid or malformed request body returns a 400 error","Unsupported body type (not json/form-data/text) causes validation failure","Network or RPC issues on Base may cause payment timeouts","Calling a tool with incorrect parameters returns a tool-specific error response"],"whenToPreferThis":"Choose this endpoint when you need frictionless, no-account access to a variety of utility tools (crypto data, media generation, proof verification, job search) and can pay $0.001 USDC per call via the x402 protocol on Base. Ideal for agents that need to avoid API key management overhead or subscription commitments across multiple tool categories.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:30:36.360Z","isFirstParty":false}