{"uid":"cap_DxPyFY0-q11whbWh9tGM9","slug":"workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-076196bb","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://workflows.agentdiet.dev/v1/agent-tool-marketplace)","url":"https://workflows.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_GLI-iz68nGJv9dB7aV1fC","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"workflows.agentdiet.dev","brandSlug":"workflows-agentdiet-dev-mpp","brandBaseUrl":"https://workflows.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Searches an index of 500+ MCP servers and A2A tools by capability query, returning compressed tool metadata routed through a Prompt-Guard firewall.","exampleAgentPrompt":"Search the MCP tool marketplace for servers that can handle SEC filings or company enrichment — I need a tool my agent can call, and I want results compressed to save tokens.","exampleUseCases":[{"title":"Discovering tools for agent swarm","prompt":"Search the agent tool marketplace for any MCP servers or A2A tools that handle GitHub security audits — I'm building an autonomous swarm and need to know what's available."},{"title":"Verifying a suspect endpoint URL","prompt":"Can you check whether this URL is a legitimate, indexed MCP tool: https://some-mcp-server.example.com/v1/tool — I want to make sure it's safe before my agent calls it."},{"title":"Finding token-efficient context compression tools","prompt":"Find me MCP servers in the marketplace that support context compression — my agent is running into token limits and I need something that compresses tool responses by at least 80%."}],"resultDescription":"Returns a compressed list of matching MCP servers or A2A tools including their capabilities, endpoint metadata, and safety status — with up to 85% token reduction applied and Prompt-Guard firewall screening on results.","failureModes":["Empty results if query terms don't match any indexed tools","Stale index if newly registered MCP servers haven't been crawled yet","Payment failure (x402) if USDC balance is insufficient for the $0.01 per-call fee","Ambiguous query returns broad unrelated results requiring query refinement","Endpoint URL verification may return inconclusive if the target is unreachable"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover available MCP servers or A2A tools at runtime without hardcoding tool lists — especially valuable in swarm architectures where agents must self-select capabilities, when token budget is tight (85% compression), or when safety screening of tool responses via Prompt-Guard is required before consumption.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:26:15.797Z","isFirstParty":false,"canonicalSlug":"workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-9abf6654"}