{"uid":"cap_0QYkiabcTu7QTRTZnLJZy","slug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-62e47359","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://prompt-guard.agentdiet.dev/api/mcp/audit)","url":"https://prompt-guard.agentdiet.dev/api/mcp/audit?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_YhdMFCDWt5DkK8ixytOqR","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"prompt-guard.agentdiet.dev","brandSlug":"prompt-guard-agentdiet-dev-mpp","brandBaseUrl":"https://prompt-guard.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches an index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results for agent tool discovery and routing.","exampleAgentPrompt":"Search the MCP tool index for servers that handle 'SEC filings' — I need to find an available A2A or MCP endpoint my agent can call for that capability.","exampleUseCases":[{"title":"Agent swarm tool routing","prompt":"I'm building a multi-agent swarm and need to find all MCP servers in the index that support 'context compression' — can you search for those and give me the top matches with their metadata?"},{"title":"Safe capability discovery for GitHub audits","prompt":"Search the MCP tool index for anything related to 'github security' so I can route my code-auditing agent to a firewall-filtered endpoint."},{"title":"B2B lead enrichment tool lookup","prompt":"Find me MCP or A2A tools in the index that handle 'company enrichment' or 'B2B lead enrichment' — I want to pick the best one for my sales automation agent."}],"resultDescription":"Returns a compressed list of matching MCP servers or A2A tools for the given capability query, including metadata such as tool names, descriptions, endpoint URLs, and firewall/compliance status, with up to 85% token compression applied.","failureModes":["Missing or empty 'query' parameter returns validation error","No matching tools found for the given capability query returns empty result set","Upstream MCP server index unavailable causes partial or degraded results","x402 payment not completed results in 402 Payment Required response","Query too vague returns low-relevance or overly broad matches"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability without hardcoding endpoints. It is especially valuable for agent swarms that need safe, token-efficient routing across a large tool ecosystem, or when you want a Prompt-Guard firewall layer between your agent and third-party tools.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:50:15.968Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-bcdfb4b9"}