{"uid":"cap_7mXs1urFe1uEK1rmgdtb5","slug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-828df4b0","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/broker/execute)","url":"https://arxiv-digest.agentdiet.dev/v1/broker/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_5cuapmh74eGNj4GYPhfen","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 and routes to 500+ MCP servers and A2A tools via a single connection, with token compression and prompt-injection firewall.","exampleAgentPrompt":"Search the MCP and A2A tool index for anything that can do 'SEC filings' or 'company enrichment' — I want to find the best available tool and route my request through a safe proxy with token compression.","exampleUseCases":[{"title":"Agent swarm tool discovery","prompt":"I'm building a multi-agent pipeline and need to find which MCP servers in the ecosystem support GitHub security auditing — search the index and tell me what's available."},{"title":"Safe-proxy routing for prompt injection protection","prompt":"My agent needs to call an external tool for B2B lead enrichment, but I want to go through a firewall that blocks prompt injection attacks — can you route it through the meta-router with the Prompt-Guard enabled?"},{"title":"Token-efficient tool lookup for context compression","prompt":"I'm running low on context window and need to find a tool that does context compression — search the 500+ MCP server index and return results with the 85% token compression so I don't blow my budget."}],"resultDescription":"Returns matched MCP server entries and A2A tool descriptors relevant to the search query, with compressed metadata (up to 85% token reduction) and safety-filtered results from the Prompt-Guard firewall.","failureModes":["Empty query string returns validation error","No matching tools found for obscure capability queries","Firewall may block or flag legitimate but ambiguously phrased queries","Payment required (HTTP 402) if x402 micropayment not attached","Timeout if downstream MCP servers are unresponsive"],"whenToPreferThis":"Choose this endpoint when you need to discover or route to any of 500+ MCP servers or A2A tools from a single connection, especially when token budget is a concern or when you need prompt-injection protection via the built-in Prompt-Guard firewall. It is superior to calling individual MCP registries directly when the right tool is unknown and needs to be searched.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:36:03.026Z","isFirstParty":false,"canonicalSlug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-0860614f"}