{"uid":"cap_Ykrp3HlHS_3VgJrHeE5re","slug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-90f4a450","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/bundle-execute)","url":"https://arxiv-digest.agentdiet.dev/v1/bundle-execute?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_TzxivQdI8lJ-ItZ3iFtl9","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":"Discovers, proxies, and routes to 500+ MCP servers and A2A tools via a single connection with token compression and prompt injection protection","exampleAgentPrompt":"Search the MCP and A2A tool registry for any available capabilities related to 'GitHub security audit' so I can find the right tool to use without connecting to each server separately.","exampleUseCases":[{"title":"Discovering tools for SEC filings","prompt":"I need to find which MCP servers or A2A tools can pull SEC EDGAR filings — search the tool registry for 'SEC filings' and tell me what's available."},{"title":"Routing agent queries to email verification","prompt":"My agent needs to verify email addresses — can you search the unified tool directory for 'email verification' and find the best available capability I can call?"},{"title":"Finding token-compressed context tools","prompt":"Look up 'context compression' in the MCP tool index and show me what servers support it so my agent doesn't burn through tokens unnecessarily."}],"resultDescription":"Returns a list of matching MCP servers or A2A tools relevant to the search query, including their names, capability descriptions, and routing metadata — delivered with up to 85% token compression to minimize LLM context usage. May also return proxied results if the query targets a specific endpoint URL for verification.","failureModes":["Empty query string returns validation error","No matching tools found for niche capability queries","Upstream MCP server unavailable during proxy routing","Prompt injection attempt blocked by Prompt-Guard firewall","x402 payment failure prevents execution","Rate limiting on high-frequency discovery calls"],"whenToPreferThis":"Choose this endpoint when you need a single entry point to discover or route across a large ecosystem of MCP servers and A2A tools without managing individual connections. It is especially valuable when token budget is a concern (85% compression), when you need firewall protection against prompt injection from untrusted tool outputs, or when building swarm/orchestrator agents that dynamically select tools at runtime. Prefer alternatives when you already know the exact MCP server or tool endpoint you need and can call it directly.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:30:23.169Z","isFirstParty":false,"canonicalSlug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-0860614f"}