{"uid":"cap_nkazZel1iu1n8yjCE_EGi","slug":"x402-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-e19815d9","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://x402-audit.agentdiet.dev/v1/tool-search)","url":"https://x402-audit.agentdiet.dev/v1/tool-search?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["query"],"properties":{"query":{"type":"string","minLength":1,"description":"Capability search query (e.g. 'context compression', 'github security', 'sec filings', 'company enrichment') or endpoint URL to verify"}}},"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_nCOYkJq-9_UZpibtnxK5m","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"x402-audit.agentdiet.dev","brandSlug":"x402-audit-agentdiet-dev-mpp","brandBaseUrl":"https://x402-audit.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches an index of 500+ MCP servers and A2A tools by capability query, returning token-compressed, prompt-guarded tool matches for agent routing.","exampleAgentPrompt":"Search the MCP and A2A tool index for anything that can do 'GitHub security auditing' — I need to find the right tool to route my agent to for scanning repos.","exampleUseCases":[{"title":"Routing agent to SEC filings tool","prompt":"My agent needs to pull SEC filings data — can you search the MCP tool index for 'SEC filings' and tell me which tools are available and what they do?"},{"title":"Discovering context compression tools","prompt":"I'm hitting token limits in my pipeline — search the A2A and MCP tool directory for 'context compression' so I can find a tool that reduces token usage before sending to the LLM."},{"title":"Finding B2B lead enrichment endpoint","prompt":"I need to enrich a list of company leads with firmographic data — search the tool index for 'company enrichment' or 'B2B lead' and tell me what MCP servers or A2A endpoints are available for that."}],"resultDescription":"A JSON object containing a list of matching MCP servers or A2A tools ranked by relevance to the query, including compressed tool descriptions, capability metadata, and routing information, filtered through the Prompt-Guard firewall.","failureModes":["Empty query string returns validation error","Query too vague returns low-relevance or empty result set","Endpoint URL verification returns 404 or timeout if target is unreachable","Payment failure (HTTP 402) if x402 USDC micropayment is not completed","Firewall (Prompt-Guard) may reject queries containing injection-like patterns"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool to use for a given capability at runtime, rather than hardcoding tool selection. Ideal for swarm orchestration, dynamic routing, or when building meta-agents that must delegate to the best available specialist tool from a large index.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:51:21.692Z","isFirstParty":false,"canonicalSlug":"x402-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-7322c524"}