{"uid":"cap_VoK7oLubG0budslQvZVOQ","slug":"serp-extract-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-d9bc9ba7","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/tool-broker)","url":"https://serp-extract.agentdiet.dev/v1/tool-broker?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_neXlhFTrRD4WnZK6JsBko","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 a meta-index of 500+ MCP servers and A2A tools by capability query, returning matching endpoints with token-compressed results and prompt-injection firewall protection.","exampleAgentPrompt":"Search the MCP tool index for servers that handle 'SEC filings' and return the best matching endpoints I can route to.","exampleUseCases":[{"title":"Agent swarm capability discovery","prompt":"I'm building a multi-agent pipeline and need to find all available MCP servers in the index that can handle GitHub security audits — search for 'github security' and give me the top matches."},{"title":"Safe proxy for unknown MCP endpoint","prompt":"Before my agent calls this external MCP endpoint at https://unknown-tool.example.com, can you run it through the tool broker to verify it's compliant and safe to proxy?"},{"title":"Finding enrichment tools for lead pipeline","prompt":"My agent needs a tool for B2B company enrichment — search the tool index for 'company enrichment' and tell me which MCP servers or A2A tools are available for that capability."}],"resultDescription":"A token-compressed list of matching MCP servers or A2A tools relevant to the query, including endpoint metadata, capability descriptions, compliance flags from the Prompt-Guard firewall, and routing recommendations — all compressed to reduce token overhead by up to 85%.","failureModes":["Empty query string returns 400 validation error","No matching tools found for obscure or misspelled capability queries","Endpoint URL verification may fail if target is offline or non-compliant","Payment required (HTTP 402) if x402 micropayment header is missing or insufficient","Rate limiting if too many queries are issued in rapid succession"],"whenToPreferThis":"Choose this endpoint when an AI agent or orchestration system needs to dynamically discover which MCP servers or A2A tools are available for a given capability, rather than hardcoding tool URLs. Especially useful when building swarm architectures, when you need firewall-protected proxying of unknown external tools, or when token budget is constrained and you need compressed tool manifests. Prefer this over manual tool registries or static MCP configs when the tool landscape is evolving.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:24:25.605Z","isFirstParty":false,"canonicalSlug":"serp-extract-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-8d70db86"}