{"uid":"cap_hOaNYY4d62Oq66KjjbGd3","slug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-53523843","name":"Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router — Broker Catalog","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/catalog)","url":"https://arxiv-digest.agentdiet.dev/v1/broker/catalog?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_HaBrNfVG1vYEEk_H7CRc5","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 tools by capability query, returning compressed, firewall-screened matches via a single connection","exampleAgentPrompt":"Search the MCP broker catalog for tools that can do SEC filings retrieval — I want to find available servers handling that capability so I can route my agent to the right one.","exampleUseCases":[{"title":"Discovering context compression tools","prompt":"I need to find MCP servers that offer context compression — can you search the broker catalog for 'context compression' and show me what's available?"},{"title":"Routing agent to GitHub security tools","prompt":"Search the A2A and MCP tool catalog for 'github security' so I can see which servers my agent can call for code audit capabilities."},{"title":"Finding company enrichment endpoints","prompt":"Look up 'company enrichment' in the MCP broker catalog and tell me which tools are indexed there — I want to wire up lead enrichment into my agent workflow."}],"resultDescription":"A compressed catalog response listing matched MCP servers and A2A tools relevant to the query, including endpoint metadata, capability descriptions, and routing information — delivered with up to 85% token compression and filtered through a Prompt-Guard firewall for safety.","failureModes":["Missing or empty 'query' parameter returns a validation error","Query matches no indexed tools — returns empty results set","Downstream MCP server unavailable — partial or degraded catalog response","Payment not processed (HTTP 402) if x402 micropayment not completed","Rate limiting or quota exceeded for repeated catalog queries"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools exist for a given capability without maintaining its own index. Ideal for swarm orchestration, tool routing decisions, or when you want a single connection point to 500+ tools with built-in prompt safety filtering and token-efficient responses. Prefer over manual tool registries when the tool landscape changes frequently or when token budget is a constraint.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:49:35.289Z","isFirstParty":false,"canonicalSlug":"arxiv-digest-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-53523843"}