{"uid":"cap_oPWBbzmP5I79uxg3TbVmE","slug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-8089f3fc","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/crypto-alpha-dag)","url":"https://arxiv-digest.agentdiet.dev/v1/crypto-alpha-dag?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_pwKenLh9c4QijWGYDMNfH","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 queries across 500+ indexed MCP servers and A2A tools with token compression and prompt-injection firewall protection.","exampleAgentPrompt":"Search the MCP and A2A tool index for anything that handles SEC filings or company lead enrichment — I want to find the right tool without connecting to hundreds of servers separately.","exampleUseCases":[{"title":"Discovering tools for crypto intelligence","prompt":"Search across all indexed MCP servers and A2A tools to find anything that handles DEX token intelligence or on-chain risk analysis — I need the best match without browsing hundreds of endpoints myself."},{"title":"Routing agent to GitHub audit capability","prompt":"Find me an MCP tool from the index that can audit a GitHub repository for supply-chain vulnerabilities and license risk — just give me the best match with its details."},{"title":"Locating a prompt firewall or content safety tool","prompt":"Can you search the A2A and MCP tool directory for anything related to prompt injection defense or a prompt guard firewall? I want to add safety to my agent pipeline."}],"resultDescription":"Returns a compressed, token-efficient response listing matching MCP servers or A2A tools relevant to the query, including tool metadata, capability descriptions, and routing information — filtered through a Prompt-Guard firewall to prevent injection attacks.","failureModes":["No matching tools found for the query — empty or minimal result set","Query too vague — returns too many loosely-matched tools without clear ranking","Prompt-Guard firewall blocks query if it resembles an injection attempt","Payment required (HTTP 402) if x402 credentials are missing or insufficient","Timeout if the meta-router is under high load across 500+ indexed servers","Malformed query (missing required 'query' field) returns validation error"],"whenToPreferThis":"Choose this endpoint when an agent needs to dynamically discover the right MCP server or A2A tool for a task without hardcoding individual connections, especially when the tool landscape is unknown or changes frequently. Ideal for swarm orchestration, meta-agent architectures, or when you want a single connection point that fans out to 500+ tools with token-efficient responses and built-in prompt safety.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T00:31:00.538Z","isFirstParty":false,"canonicalSlug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-0860614f"}