{"uid":"cap_5M1XVafOyPknM_8P19mt6","slug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-e39792da","name":"Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (RAG Context Sanitizer)","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/workflows/rag-context-sanitizer)","url":"https://arxiv-digest.agentdiet.dev/v1/workflows/rag-context-sanitizer?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_t99FO2493iBSPiARqqouq","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 an index of 500+ MCP servers and A2A tools by capability query, returning compressed, prompt-guard-filtered results for agent tool discovery and routing.","exampleAgentPrompt":"Search the MCP and A2A tool index for capabilities related to 'SEC filings' so I can find the right tool to pull company financial data.","exampleUseCases":[{"title":"Discover tools for lead enrichment","prompt":"Search the agent tool index for anything related to 'B2B lead enrichment' or 'company enrichment' — I want to find MCP servers or A2A tools I can plug into my sales pipeline agent."},{"title":"Find prompt firewall for agent pipeline","prompt":"Can you look up tools for 'prompt injection firewall' or 'prompt guard' in the MCP tool registry? I need to add safety filtering before my agent processes user inputs."},{"title":"Route to GitHub audit capability","prompt":"Search the MCP tool discovery index for 'github security audit' — I want to find the right A2A endpoint my agent can call to scan a repository for vulnerabilities."}],"resultDescription":"Returns a compressed, firewall-sanitized list of matching MCP servers or A2A tool endpoints relevant to the query, including capability descriptions, endpoint URLs, and routing metadata — with up to 85% token reduction for agent-efficient consumption.","failureModes":["Empty query string returns validation error","Query matches no indexed tools — returns empty results set","Endpoint URL verification query targets an unreachable server — returns timeout or unreachable status","Overly broad query may return too many low-relevance results","Prompt-Guard firewall may sanitize or block queries it detects as potentially adversarial"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool supports a given capability, rather than hardcoding tool connections. Especially useful when building swarm orchestrators, meta-agents, or pipelines that need to route tasks to the best available tool at runtime with minimal token overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:23:18.221Z","isFirstParty":false,"canonicalSlug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-e39792da"}