{"uid":"cap_ITNYnwMtpkcgr96AIXgFO","slug":"mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-629d5a4c","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://mcp-security.agentdiet.dev/v1/x402-gateway)","url":"https://mcp-security.agentdiet.dev/v1/x402-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_xppvQRfGbvcW4Q79IOcwX","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"mcp-security.agentdiet.dev","brandSlug":"mcp-security-agentdiet-dev-mpp","brandBaseUrl":"https://mcp-security.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches an index of 500+ MCP servers and A2A tools by capability query, returning token-compressed results with prompt-injection firewall protection.","exampleAgentPrompt":"Search the MCP tool index for servers that handle 'company enrichment' — I need to find the best available A2A tool for enriching B2B lead data in my agent pipeline.","exampleUseCases":[{"title":"Discover context compression MCP tools","prompt":"Search the MCP tool index for anything related to 'context compression' — I want to find a server my agent can call to reduce token usage in long conversations."},{"title":"Verify a suspicious MCP endpoint URL","prompt":"Can you check this endpoint URL against the MCP registry to verify it's a legitimate tool and not something malicious before I let my agent call it?"},{"title":"Route agent to SEC filings capability","prompt":"My agent needs to pull 10-K filings but I don't know which MCP server handles that — search the tool index for 'SEC filings' and tell me what's available."}],"resultDescription":"Returns a list of matching MCP servers or A2A tools relevant to the capability query, with metadata about each tool, compressed to reduce token usage (~85% compression). Results pass through a Prompt-Guard firewall that filters prompt-injection content before returning to the caller.","failureModes":["Empty query string returns validation error (query is required, minLength 1)","No matching tools found for obscure capability queries returns empty result set","Payment required (HTTP 402) if x402 micropayment not provided ($0.01 per call)","Endpoint URL verification may fail if the target URL is unreachable or not in the index","Prompt-Guard firewall may strip or flag results containing injection-like content"],"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 hardcoding a specific tool. Ideal for multi-agent swarm architectures where the right downstream tool isn't known ahead of time. Prefer this over manual MCP server lists when you need firewall-filtered, token-compressed results from a broad index of 500+ tools in a single connection.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:22:44.523Z","isFirstParty":false,"canonicalSlug":"mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-88de6323"}