{"uid":"cap_-JwU8vJGTpkN3jmR5TkVL","slug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-1d802686","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/web-rag-shield-dag)","url":"https://prompt-guard.agentdiet.dev/v1/web-rag-shield-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_es8XI3E1g-rrYKq8Rpya1","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 token-compressed results filtered through a prompt-injection firewall","exampleAgentPrompt":"Search the MCP and A2A tool index for servers that support 'SEC filings' or 'company enrichment' — I need to find a safe, token-efficient tool my agent can call for that capability.","exampleUseCases":[{"title":"Finding a GitHub audit tool for an agent","prompt":"Search the tool index for MCP servers that can do GitHub security audits — I need one my agent can safely call without prompt injection risks."},{"title":"Discovering DEX token intelligence tools","prompt":"Can you find me any available MCP or A2A tools indexed under 'DEX token intelligence' or 'on-chain risk'? I want to plug one into my crypto trading agent."},{"title":"Locating email verification capability","prompt":"Search across the 500+ MCP server index for any tools that handle email verification — I need to wire one into my lead qualification workflow."}],"resultDescription":"Returns a token-compressed list of matching MCP servers or A2A tools relevant to the capability query, including tool metadata filtered through a Prompt-Guard firewall to block prompt-injection risks. If a URL is submitted, returns verification results for that endpoint.","failureModes":["No matching tools found for the query — returns empty result set","Query is too vague, resulting in low-relevance matches","Endpoint URL verification fails if the target is unreachable or non-compliant","Payment required (HTTP 402) if x402 micropayment is not supplied","Rate limiting or firewall rejection if query triggers safety filters"],"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 token budget is a concern (85% compression) or when prompt injection safety is required. Prefer over manually curated tool lists when the agent must route to one of hundreds of tools at runtime.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:51:28.176Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-bcdfb4b9"}