{"uid":"cap_u3_EzXsJ8P3ld7R66bWjl","slug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-e8412de9","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/a2a-mesh)","url":"https://prompt-guard.agentdiet.dev/v1/a2a-mesh?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_r1PlUWD7HZKEDLq7ALEm5","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, returning token-compressed results through a Prompt-Guard firewall","exampleAgentPrompt":"Search the A2A mesh for MCP tools that handle SEC filings — I need to find a capable, safe-proxied endpoint I can route my agent to for financial document retrieval.","exampleUseCases":[{"title":"Finding a GitHub security audit tool","prompt":"I need to connect my agent to an MCP server that can audit GitHub repos for security issues — search the tool index for 'github security' and give me the best available options."},{"title":"Discovering lead enrichment agent tools","prompt":"Can you search the MCP meta-router for tools that do B2B lead enrichment or company data lookup? I want to find a safe, token-efficient endpoint my swarm can call."},{"title":"Routing agent to context compression capability","prompt":"My agent pipeline is hitting token limits — search the A2A mesh for tools that support context compression or summarization so I can plug one in."}],"resultDescription":"A token-compressed list (up to 85% compression) of matching MCP servers and A2A tools relevant to the query, filtered through the Prompt-Guard firewall, including endpoint metadata such as capability descriptions, URLs, compliance signals, and routing information.","failureModes":["Empty or vague query returns no matches or low-relevance results","Queried capability not indexed among the 500+ servers returns an empty result set","Prompt-Guard firewall blocks queries flagged as adversarial or unsafe","Upstream MCP server index unavailable causes routing failure","x402 payment failure results in 402 response without content","Rate limiting or quota exceeded returns an error response"],"whenToPreferThis":"Choose this endpoint when an AI agent or swarm needs to dynamically discover which MCP server or A2A tool to call for a given capability, rather than hard-coding tool connections. Especially useful when you want a single connection point that proxies safely to 500+ tools, need token-compressed responses to reduce LLM costs, or want Prompt-Guard firewall protection when routing to external agent tools. Prefer over manual tool registries when the target capability space is broad or unknown at build time.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:25:53.062Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-bcdfb4b9"}