{"uid":"cap_EN89TjzohEHQmsl4L6rVO","slug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-2ad05237","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/broker/execute)","url":"https://prompt-guard.agentdiet.dev/v1/broker/execute?utm_source=zero.xyz","method":"POST","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_qiV1FiNBEuNj00q1m20HH","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":"Discovers and routes to 500+ MCP servers and A2A tools via a single connection, with 85% token compression and prompt-injection firewall protection.","exampleAgentPrompt":"Search the MCP tool index for anything that handles SEC filings or company enrichment — I want to find the right tool to call for financial data on a public company.","exampleUseCases":[{"title":"Finding the right MCP tool for a task","prompt":"I need to pull GitHub security audit data for a repo — search the MCP tool index for something that handles GitHub audits and tell me which one to use."},{"title":"Swarm router for multi-tool agent pipeline","prompt":"My agent needs to chain together tools for domain OSINT, email verification, and B2B lead enrichment — can you find and route to the right MCP servers for all three in one call?"},{"title":"Verifying a suspicious MCP endpoint URL","prompt":"Before my agent calls this MCP endpoint at some third-party URL, can you run it through the safe-proxy to check if it has prompt-injection risks or looks malicious?"}],"resultDescription":"Returns a structured list of matching MCP servers or A2A tools relevant to the query, including compressed tool metadata, routing instructions, and prompt-guard safety verdicts — all optimized for minimal token usage by the calling agent.","failureModes":["Empty or ambiguous query returns no matching tools","Unknown or unindexed capability query yields empty result set","Malformed endpoint URL input causes validation error","Payment not attached triggers HTTP 402 response","Rate limiting on high-frequency discovery calls","Tool index may lag newly registered MCP servers"],"whenToPreferThis":"Choose this endpoint when an agent needs to dynamically discover which MCP server or A2A tool to call for a given capability, rather than hard-coding a specific tool. Especially useful in swarm or orchestration architectures where the right downstream tool is not known in advance. Prefer this over direct MCP calls when prompt-injection firewall protection is needed for untrusted tool responses, or when token budget is tight and the 85% compression benefit is valuable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:31:30.980Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-bcdfb4b9"}