{"uid":"cap_gXRKDnjp0UGlJgjLTOTCL","slug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-6e863c9e","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/universal-mcp-gateway)","url":"https://prompt-guard.agentdiet.dev/v1/universal-mcp-gateway?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_qqN8DV1uYr3YL1s2rDbrD","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 and routes to 500+ MCP servers and A2A agent tools via a single connection, with token compression and prompt injection firewall.","exampleAgentPrompt":"Search the MCP tool index for 'SEC filings' and tell me which agent tools or servers are available to handle that capability.","exampleUseCases":[{"title":"Discovering tools for GitHub security audits","prompt":"Search the universal MCP gateway for any available tools that can do GitHub security audits or code vulnerability scanning — I want to find which servers support that."},{"title":"Finding on-chain risk analysis agents","prompt":"Can you look up the MCP tool index for 'on-chain risk' or DeFi intelligence tools? I need to route my agent to something that can analyze crypto wallet risk."},{"title":"Routing to company enrichment capability","prompt":"Search for B2B lead enrichment or company enrichment tools in the MCP swarm — I want to find a safe proxy I can send company names to and get back firmographic data."}],"resultDescription":"Returns a list of matching MCP servers or A2A tool endpoints relevant to the search query, with compressed metadata describing each tool's capabilities, likely including endpoint URLs, supported methods, and relevance scores. Compressed output aims for 85% token reduction versus full schema responses.","failureModes":["Empty results if query is too vague or no tools match","HTTP 402 payment required if x402 credentials are missing or insufficient","Query string missing or empty returns validation error","Upstream MCP servers unavailable may return partial or stale results","Prompt injection attempts blocked by Prompt-Guard firewall with rejection notice"],"whenToPreferThis":"Choose this endpoint when an agent needs to dynamically discover which MCP server or A2A tool can handle a specific capability at runtime, rather than hardcoding a specific tool. Ideal for swarm orchestration, multi-agent pipelines, or when the right downstream tool is unknown ahead of time. The built-in prompt firewall makes it safer than calling unknown MCP servers directly.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:21:49.517Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-bcdfb4b9"}