{"uid":"cap_6CN1eubKq6yJvVb4NqEHm","slug":"x402-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-3f1f61ea","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://x402-audit.agentdiet.dev/v1/agent-tool-marketplace)","url":"https://x402-audit.agentdiet.dev/v1/agent-tool-marketplace?utm_source=zero.xyz","method":"POST","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_Hnjd4QI2cOSdcAmDC_v7V","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"x402-audit.agentdiet.dev","brandSlug":"x402-audit-agentdiet-dev-mpp","brandBaseUrl":"https://x402-audit.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches a meta-index of 500+ MCP servers and A2A tools by capability query, returning matching endpoints with token-compressed results and Prompt-Guard firewall protection","exampleAgentPrompt":"Search the agent tool marketplace for MCP servers or A2A tools that handle 'company enrichment' — I want to find the best available tool for enriching B2B lead data.","exampleUseCases":[{"title":"Discover tools for SEC filing retrieval","prompt":"Can you search the agent tool marketplace for any MCP servers or A2A tools that support pulling SEC filings or EDGAR data? I need to find something I can plug into my research agent."},{"title":"Find a prompt firewall or safety tool","prompt":"Search for MCP tools related to 'prompt guard' or 'prompt firewall' — I want to route my swarm agents through something that filters out prompt injection attacks."},{"title":"Route agent to context compression tool","prompt":"Look up what tools are available in the marketplace for 'context compression' or token reduction — I'm trying to cut down the token usage in my agent pipeline."}],"resultDescription":"Returns a list of matching MCP servers and A2A tools relevant to the query, including endpoint metadata, capability descriptions, and token-compressed summaries, filtered through a Prompt-Guard firewall to remove unsafe content.","failureModes":["Empty or vague query returns no results or low-relevance matches","Query for a very niche capability may return zero indexed tools","Rate limiting or payment failure (x402) blocks access","Prompt-Guard firewall may reject queries that appear adversarial","Upstream MCP server metadata may be stale or unavailable","Malformed query string causes validation error"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover which external MCP server or A2A tool to call for a given capability, especially when the right tool is not known in advance. It is particularly useful for multi-agent swarms, agent orchestrators, or meta-agents that need to route tasks to specialized tools. Prefer this over manually maintaining a list of tool endpoints, or when you need token-compressed, firewall-filtered results from a large index of 500+ tools.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:36:00.436Z","isFirstParty":false,"canonicalSlug":"x402-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-7322c524"}