{"uid":"cap_yhosoHUnHjy_gOH3JoQe0","slug":"x402-broker-catalog-endpoint-mcp-a2a-x402-api-discovery-4b6e7f7b","name":"X402-BROKER Catalog Endpoint — MCP/A2A/x402 API Discovery","description":"Deterministic B2A/A2A/MCP/x402/MPP/L402 execution and intelligence node at https://mcp-gateway.agentdiet.dev settling in USDC on Base.","url":"https://mcp-gateway.agentdiet.dev/v1/broker/catalog?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","POST"],"type":"string"},"queryParams":{"type":"object","properties":{"query":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"data":{},"status":"ok","roi_proof":{"compression_ratio_pct":91.4}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_l6HAs3qGvRXI_nuFflExl","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a searchable catalog of 31,390+ MCP servers, x402 APIs, and A2A agents available for brokered execution, settable in USDC on Base.","exampleAgentPrompt":"Search the X402-BROKER catalog for MCP servers or x402 APIs related to 'weather forecasting' so I can find one to call from my agent pipeline.","exampleUseCases":[{"title":"Discovering tools for an agent pipeline","prompt":"Search the broker catalog for any MCP servers or x402 APIs that handle PDF parsing — I need to wire one into my document processing agent."},{"title":"Finding payment-capable agent services","prompt":"Browse the X402-BROKER catalog and show me which A2A agents or APIs support cryptocurrency-related tasks and settle in USDC on Base."},{"title":"Exploring available AI agent integrations","prompt":"Pull up the full catalog from the MCP gateway so I can see what kinds of tools and agents are available for my autonomous research workflow."}],"resultDescription":"Returns a JSON object with a 'data' field containing catalog entries for MCP servers, x402 APIs, and A2A agents, a 'status' field ('ok'), and an 'roi_proof' object showing a compression ratio (e.g. 91.4%) indicating the efficiency of the catalog response.","failureModes":["Payment not included or insufficient USDC (HTTP 402) — request rejected without valid x402 payment header","Invalid query parameter type — 400 error if queryParams.query is not a string","Method not in allowed enum (GET/POST) — validation failure","Gateway unavailable or catalog service down — 503 or timeout","Empty result set if query string matches no catalog entries"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover which MCP servers, x402 APIs, or A2A agents are available for a given task before routing execution. It is particularly useful in agentic pipelines that need to self-select tools at runtime, or when building agent orchestration layers that need a live, searchable registry of 30,000+ services accessible via USDC micropayments on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T12:43:33.277Z","isFirstParty":false,"canonicalSlug":"x402-broker-catalog-endpoint-mcp-a2a-x402-api-discovery-4b6e7f7b"}