{"uid":"cap_FUkyXgDeXoAGGIpast8DI","slug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-2d2299d3","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/v1/agent-tool-marketplace)","url":"https://prompt-guard.agentdiet.dev/v1/agent-tool-marketplace?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_rjGhG5P5gHMPMp_6Tlfwy","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 a meta-index of 500+ MCP servers and A2A tools by capability query and returns compressed, firewall-screened results via a single connection.","exampleAgentPrompt":"Search the MCP and A2A tool marketplace for servers that handle 'SEC filings' — I want to find a tool I can route that task through.","exampleUseCases":[{"title":"Discovering context compression tools","prompt":"Find me MCP servers in the tool marketplace that handle context compression — I want to reduce token usage in my agent pipeline."},{"title":"Routing GitHub security audit tasks","prompt":"Search the A2A and MCP tool index for something that can do GitHub security auditing — I need to plug it into my swarm."},{"title":"Finding B2B lead enrichment agents","prompt":"Look through the tool marketplace for any MCP server or A2A agent that does B2B lead enrichment or company data enrichment."}],"resultDescription":"Returns a compressed list of matching MCP servers and A2A tool entries (from a 500+ item index) relevant to the capability query, filtered through the Prompt-Guard firewall for safety, with token-compressed metadata.","failureModes":["Empty query string returns validation error","No tools found matching niche query returns empty result set","Prompt-Guard firewall blocks potentially unsafe queries","Payment required (HTTP 402) if x402 payment header is missing or invalid","Endpoint URL verification query returns compliance status or error if URL is unreachable"],"whenToPreferThis":"Use this endpoint when an agent needs to dynamically discover which MCP server or A2A tool to delegate a subtask to, especially when the tool ecosystem is large and unknown. Prefer it over hardcoding tool URLs, over narrow single-provider directories, or when token budget is tight (85% compression). Best suited for swarm orchestration, meta-routing, and capability-gap detection at runtime.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:24:37.723Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-bcdfb4b9"}