{"uid":"cap_USHZjMUB_KfgLy3SGeErl","slug":"serp-extract-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-f6b71f79","name":"Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router","description":"Single-connection meta-router indexing 500+ MCP servers & A2A tools with 85% token compression and Prompt-Guard firewall. (Live x402 v2, IETF MPP & MCP endpoint at https://serp-extract.agentdiet.dev/v1/mcp-gateway)","url":"https://serp-extract.agentdiet.dev/v1/mcp-gateway?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["query"],"properties":{"limit":{"type":"integer","default":20,"maximum":100,"minimum":1,"description":"Maximum number of items to return per page (1-100)"},"query":{"type":"string","minLength":1,"description":"Capability search query (e.g. 'context compression', 'github security', 'sec filings', 'company enrichment') or endpoint URL to verify"},"cursor":{"type":"string","description":"Opaque pagination cursor for fetching the next page"}}},"responseSchema":{"type":"object"},"example":null,"exampleRequest":null,"tags":[],"displayCostAmount":"0.01","displayCostAsset":"USD","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":"mpp","network":"tempo","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_pR7vFtyY2ZnAoS3P74D9I","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"serp-extract.agentdiet.dev","brandSlug":"serp-extract-agentdiet-dev-mpp","brandBaseUrl":"https://serp-extract.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches and discovers 500+ MCP servers and A2A tools by capability query, returning token-compressed results with Prompt-Guard firewall protection.","exampleAgentPrompt":"Search the MCP tool index for servers that can handle 'context compression' and return the top 10 results — I want to find the best agent-compatible tools for shrinking token usage in my pipeline.","exampleUseCases":[{"title":"Swarm agent tool discovery","prompt":"Search for MCP servers and A2A tools that handle 'GitHub security auditing' and give me the top 20 matches so I can wire one into my swarm router."},{"title":"Finding SEC filing tools","prompt":"I need to find agent tools that can pull SEC filings — search the MCP gateway index for 'SEC filings' and show me up to 15 results."},{"title":"Validating a known endpoint","prompt":"Can you check whether https://serp-extract.agentdiet.dev/v1/web-distill is listed and verified in the MCP tool index? Run a query against it and confirm it's there."}],"resultDescription":"A paginated JSON object containing matching MCP server and A2A tool records ranked by relevance to the query, with token-compressed metadata and pagination cursor for fetching additional pages. Results may include tool names, descriptions, capability tags, and endpoint URLs, filtered through a Prompt-Guard firewall.","failureModes":["Empty results if the query string is too vague or no tools match","Pagination errors if an invalid or expired cursor is supplied","Rate limiting or 402 payment required if the per-call micropayment has not been processed","Timeout if the meta-router is indexing or unreachable","Query too short (minLength:1 violation) returns a validation error"],"whenToPreferThis":"Choose this endpoint when an AI agent or orchestrator needs to dynamically discover MCP-compatible or A2A-compatible tools by capability at runtime, rather than maintaining a static tool registry. Especially useful for swarm architectures that need to route tasks to the best available tool from a large index of 500+ servers, with built-in token compression and prompt injection protection.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:30:32.660Z","isFirstParty":false,"canonicalSlug":"serp-extract-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-8d70db86"}