{"uid":"cap_iJ8MDLGcfJ_pPAEhc2zfK","slug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-a0fc85ca","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://prompt-guard.agentdiet.dev/v1/tool-search)","url":"https://prompt-guard.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_B0sNn6D2KwQA5PzeEtIYn","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"prompt-guard.agentdiet.dev","brandSlug":"prompt-guard-agentdiet-dev-mpp","brandBaseUrl":"https://prompt-guard.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches an index of 500+ MCP servers and A2A tools by capability query, returning relevant endpoints with token-compressed results filtered through a Prompt-Guard firewall.","exampleAgentPrompt":"Search the MCP and A2A tool index for endpoints that handle SEC filings and company enrichment — I need to find available tools I can route my agent through.","exampleUseCases":[{"title":"Discovering tools for GitHub security audits","prompt":"Search the tool index for any MCP servers or A2A endpoints that can do GitHub security audits or code vulnerability scanning — I want to know what's available before I wire up my agent pipeline."},{"title":"Finding on-chain risk analysis endpoints","prompt":"Can you look up what MCP tools are indexed for on-chain risk or DEX token intelligence? I need to route my crypto agent through a safe proxy that supports those capabilities."},{"title":"Routing agent to email verification tools","prompt":"Search the A2A tool registry for endpoints that handle email verification — I'm building a lead validation workflow and need to know which indexed tools support that capability."}],"resultDescription":"Returns a list of matching MCP servers or A2A tool endpoints relevant to the capability query, with token-compressed descriptions (up to 85% compression) and Prompt-Guard firewall filtering applied. Results include tool names, endpoint references, and capability summaries.","failureModes":["Empty query string returns validation error (query is required, minLength 1)","Query matches no indexed tools — returns empty result set","Payment not completed (HTTP 402) when x402 micropayment is not provided","Upstream MCP server index temporarily unavailable — degraded or empty results","Query too broad returns low-relevance noise across many tools"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability, especially when operating across a large and varied tool ecosystem. Ideal for swarm agents that need to self-route to the right tool at runtime without hardcoding endpoint lists. Prefer this over manual tool registries when token efficiency matters, as the 85% compression reduces LLM context overhead significantly.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:21:33.109Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-bcdfb4b9"}