{"uid":"cap_5U-sG6_Cf9yTdM5ZDn9lA","slug":"shopify-spy-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-22b667e0","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://shopify-spy.agentdiet.dev/v1/agent-tool-marketplace)","url":"https://shopify-spy.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_TZokn9G5aDoMRGYgOWfEi","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"shopify-spy.agentdiet.dev","brandSlug":"shopify-spy-agentdiet-dev-mpp","brandBaseUrl":"https://shopify-spy.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-injection firewall protection.","exampleAgentPrompt":"Search the agent tool marketplace for MCP servers and A2A tools that can do 'company enrichment and B2B lead data' — I want to find which tools are available and how to connect to them.","exampleUseCases":[{"title":"Discover tools for SEC filing research","prompt":"Search the agent tool marketplace for any MCP servers or A2A tools that handle SEC filings and financial document retrieval — I need to wire one into my research agent."},{"title":"Verify a specific endpoint in the registry","prompt":"Check whether this endpoint URL https://example-tool.dev/v1/some-api is listed and verified in the agent tool marketplace index."},{"title":"Find context compression tools for swarm agent","prompt":"I'm building a multi-agent swarm and need tools for context compression and token reduction — search the marketplace for available MCP servers that do that."}],"resultDescription":"Returns a list of matching MCP server or A2A tool entries from the 500+ tool index, with endpoint metadata, capability descriptions, and token-compressed summaries. Results are filtered through the Prompt-Guard firewall to remove injected or malicious content before returning to the calling agent.","failureModes":["Empty query string returns validation error (query is required, minLength 1)","No matching tools found for an obscure or misspelled capability query returns empty result set","Payment required error (HTTP 402) if x402 micropayment of $0.01 USDC not provided","Endpoint URL verification query for a URL not in the index returns not-found result","Index may be stale if a newly added MCP server has not yet been crawled"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools exist for a given capability at runtime, rather than hardcoding tool lists. Especially useful for swarm orchestrators, agent-builder frameworks, or meta-agents that need to route subtasks to specialized tools on demand. Prefer over manual tool catalogs when you need token-compressed results or prompt-injection-safe tool metadata.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:37:51.259Z","isFirstParty":false,"canonicalSlug":"shopify-spy-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-b0d21200"}