{"uid":"cap_0SVaB_0sjlIzY2LX6Efci","slug":"email-verify-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-402c71aa","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://email-verify.agentdiet.dev/v1/web-rag-shield-dag)","url":"https://email-verify.agentdiet.dev/v1/web-rag-shield-dag?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_2tZ2wIgZrXksrSOPK-sZR","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"email-verify.agentdiet.dev","brandSlug":"email-verify-agentdiet-dev-mpp","brandBaseUrl":"https://email-verify.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches a meta-index of 500+ MCP servers and A2A tools by capability query, routing requests through a token-compressed proxy with a Prompt-Guard firewall.","exampleAgentPrompt":"Search the agentdiet MCP and A2A tool registry for any available capabilities related to 'context compression' and tell me which servers and tools match.","exampleUseCases":[{"title":"Discover tools for SEC filings","prompt":"Can you search the MCP tool registry for anything related to SEC filings or financial document retrieval and list the top matching tools?"},{"title":"Find prompt firewall or safety tools","prompt":"Search the A2A and MCP index for tools that do prompt injection protection or firewall filtering — I need something to guard my agent pipeline."},{"title":"Locate GitHub audit capabilities","prompt":"I need a GitHub security audit tool — can you query the meta-router index for MCP servers that handle GitHub code scanning or repository audits?"}],"resultDescription":"Returns a structured list of matching MCP servers or A2A tools from a 500+ entry registry, including capability metadata, with 85% token compression applied and Prompt-Guard firewall screening on all proxied responses.","failureModes":["Query too vague returns low-relevance or empty tool list","Prompt-Guard firewall blocks a query flagged as adversarial, returning a rejection response","Registry index may be stale if upstream MCP servers have gone offline","Payment required (HTTP 402) if x402 micropayment header is missing or invalid","Malformed query (missing or empty 'query' field) returns validation error"],"whenToPreferThis":"Choose this endpoint when an agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability without hard-coding individual service URLs, especially when token budget is limited (85% compression) or when prompt injection safety via the built-in firewall is a priority.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:37:44.391Z","isFirstParty":false,"canonicalSlug":"email-verify-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-818d5a00"}