{"uid":"cap_MLp20-mhMMKhqx58ddkNV","slug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-a13210f9","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/security-audit-dag)","url":"https://prompt-guard.agentdiet.dev/v1/security-audit-dag?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_GHdfRSGB4Rb14bZh4KJLf","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 a meta-index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results through a single connection","exampleAgentPrompt":"Search the MCP and A2A tool index for anything that does 'company enrichment' — I need to find available tools I can route through without setting up separate connections.","exampleUseCases":[{"title":"Discover SEC filing tools for agent","prompt":"Search the MCP tool index for anything that handles SEC filings or financial document retrieval — I want to find available servers I can call from my agent pipeline."},{"title":"Find prompt injection defense tools","prompt":"Look up what MCP servers or A2A tools are available for prompt firewall or prompt injection protection — I'm building an agent and need to add a security layer."},{"title":"Route agent through DEX token intelligence","prompt":"Search your tool index for 'DEX token intelligence' or on-chain risk tools — I need to discover which MCP endpoints cover crypto token analysis so I can wire them into my swarm."}],"resultDescription":"Returns a compressed list of matching MCP servers and A2A tools relevant to the capability query, including metadata about each tool, filtered through the Prompt-Guard firewall to remove malicious or non-compliant endpoints. Results are token-compressed (up to 85%) for efficient agent consumption.","failureModes":["Missing or empty 'query' parameter returns a 400 validation error","No matching tools found returns an empty result set","Payment not provided or invalid triggers HTTP 402 response requiring x402 USDC payment","Firewall blocks query if it resembles a prompt injection attempt","Timeout if upstream MCP index is unreachable"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability without hardcoding connections to individual services. Ideal for agent orchestration layers, swarm routers, or when building meta-agents that need to self-assemble tool pipelines. Prefer this over direct MCP server calls when you want a single entry point with built-in security filtering and token compression.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:46:50.324Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-bcdfb4b9"}