{"uid":"cap_c0hXK8VVVj18J_nlF8YXh","slug":"serp-extract-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-dae98b62","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://serp-extract.agentdiet.dev/v1/universal-mcp-gateway)","url":"https://serp-extract.agentdiet.dev/v1/universal-mcp-gateway?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["query"],"properties":{"limit":{"type":"integer","default":20,"maximum":100,"minimum":1,"description":"Maximum number of items to return per page (1-100)"},"query":{"type":"string","minLength":1,"description":"Capability search query (e.g. 'context compression', 'github security', 'sec filings', 'company enrichment') or endpoint URL to verify"},"cursor":{"type":"string","description":"Opaque pagination cursor for fetching the next page"}}},"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_5W7VvIi4QuQKks9uNH5Xh","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"serp-extract.agentdiet.dev","brandSlug":"serp-extract-agentdiet-dev-mpp","brandBaseUrl":"https://serp-extract.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches a meta-index of 500+ MCP servers and A2A tools by capability query, returning matching endpoints with token-compressed results and prompt-injection firewall protection.","exampleAgentPrompt":"Search the MCP gateway index for tools that can handle SEC filings and company enrichment — I need to find which servers in the 500+ index support those capabilities.","exampleUseCases":[{"title":"Swarm agent tool selection","prompt":"I'm building a multi-agent swarm and need to find which MCP servers in the index support GitHub security auditing — can you search the universal MCP gateway for that capability?"},{"title":"Capability gap discovery","prompt":"Search the MCP tool index for anything that supports on-chain risk or DEX token intelligence so I know which endpoints my trading agent can delegate to."},{"title":"Endpoint URL compliance check","prompt":"Can you verify whether https://serp-extract.agentdiet.dev/v1/universal-mcp-gateway is indexed and listed as a valid, compliant A2A endpoint in the tool registry?"}],"resultDescription":"Returns a token-compressed list of matching MCP servers and A2A tool endpoints relevant to the capability query, including metadata about each tool, filtered through a Prompt-Guard firewall to prevent injection attacks. Results are compressed by ~85% compared to raw responses.","failureModes":["Empty query string returns a validation error (minLength:1 not met)","Query matches no indexed tools — returns empty result set","Endpoint URL verification fails if the URL is not indexed or unreachable","Rate limiting or payment failure (x402) blocks the request","Prompt-Guard firewall may flag and block queries containing injection-like patterns"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability, rather than hard-coding tool URLs. Especially useful for swarm orchestrators that need to delegate subtasks to the right tool at runtime, or when verifying whether a specific endpoint URL is valid and indexed. Prefer over manual tool registries when token efficiency and injection safety are priorities.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:23:07.812Z","isFirstParty":false,"canonicalSlug":"serp-extract-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-8d70db86"}