{"uid":"cap_jU02QOx5qquiR_AcBBbMC","slug":"preflight-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-2dfe7384","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://preflight.agentdiet.dev/v1/x402-gateway)","url":"https://preflight.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_kpC7e9pChru4HOCMVoUbW","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"preflight.agentdiet.dev","brandSlug":"preflight-agentdiet-dev-mpp","brandBaseUrl":"https://preflight.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches and routes across 500+ MCP servers and A2A tools, returning compressed capability matches with prompt-injection firewall protection.","exampleAgentPrompt":"Search the MCP and A2A tool index for anything that can handle 'SEC filings' — I want to know which servers are available, what they do, and whether they're safe to call.","exampleUseCases":[{"title":"Discovering tools for GitHub security audits","prompt":"Search the MCP tool index for anything related to 'github security' — I need to know which A2A agents or MCP servers can audit repos for vulnerabilities."},{"title":"Finding context compression agents for a swarm","prompt":"Can you look up what MCP servers are available for 'context compression'? I'm building a multi-agent pipeline and need to trim token usage between hops."},{"title":"Verifying a third-party endpoint before calling it","prompt":"Before my agent calls this URL, can you run it through the tool discovery router to verify it's a legitimate MCP endpoint and not a prompt injection risk: https://some-external-mcp.example.com/v1/tool"}],"resultDescription":"Returns a compressed list of matching MCP servers and A2A tools relevant to the query, including capability summaries, endpoint metadata, and prompt-safety status — with up to 85% token reduction versus raw discovery responses.","failureModes":["Empty or too-broad query returns low-relevance matches","Unknown or unindexed capability returns no results","Endpoint URL verification may return inconclusive safety status for novel domains","Rate limiting or payment failure (x402) if micropayment is not properly attached","Malformed query string may return a 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 at runtime, especially in multi-agent swarm architectures where token efficiency and prompt-injection safety are priorities. Prefer over manual registry lookups when you need a single connection point to 500+ tools with built-in Prompt-Guard firewall.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:19:57.829Z","isFirstParty":false,"canonicalSlug":"preflight-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-f8f7c79e"}