{"uid":"cap_txl4-A0pcZaylYYSsnI8R","slug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-20269783","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://arxiv-digest.agentdiet.dev/v1/security-audit-dag)","url":"https://arxiv-digest.agentdiet.dev/v1/security-audit-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_2OgQakHHFdmjpNs1lxyd-","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"arxiv-digest.agentdiet.dev","brandSlug":"arxiv-digest-agentdiet-dev-mpp","brandBaseUrl":"https://arxiv-digest.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches a meta-index of 500+ MCP servers and A2A agent tools by capability query, returning compressed, firewall-filtered results with token savings.","exampleAgentPrompt":"Search the MCP and A2A tool index for any servers that support 'github security' auditing — I want to find the best available tool and see a compressed summary of what it offers.","exampleUseCases":[{"title":"Discover tools for SEC filings research","prompt":"Search the MCP tool index for anything that handles SEC filings or financial document retrieval — I need to find a capable tool my agent can use."},{"title":"Find prompt firewall capabilities","prompt":"Look through the A2A and MCP server index for tools that offer prompt injection protection or a prompt firewall — I want to know what's available."},{"title":"Route to company enrichment tools","prompt":"Search for MCP servers that do B2B company enrichment or tech stack detection — give me the best matches from the index with a compressed summary."}],"resultDescription":"Returns a filtered, token-compressed list of matching MCP servers or A2A tools from a 500+ item index, including tool metadata, capability descriptions, and Prompt-Guard firewall screening results. Results are optimized for agent consumption with up to 85% token reduction.","failureModes":["Empty or too-broad query returns low-relevance results","Query for a niche capability may return no matches if not indexed","Endpoint URL verification may fail if the remote server is unreachable","Rate limiting or payment failure ($0.01 per call via x402) blocks the request","Malformed query string returns a 400 validation error"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover the best available MCP server or A2A tool for a given capability at runtime, rather than hard-coding a tool connection. Particularly useful for swarm orchestration, building adaptive agent pipelines, or auditing what tools exist in the ecosystem before committing to one. The built-in Prompt-Guard firewall and token compression make it safer and cheaper than querying multiple tool directories individually.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:22:02.923Z","isFirstParty":false,"canonicalSlug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-0860614f"}