{"uid":"cap_WiUPU_YpSEX1LqS7pBCCG","slug":"speraxos-erc-8004-agent-search-e5ca79c1","name":"SperaxOS ERC-8004 Agent Search","description":"AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.","url":"https://chat.sperax.io/api/x402/tools/erc8004/searchAgents?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"chain":{"type":"string","default":"bsc-testnet","description":"Blockchain to search on"},"limit":{"type":"number","default":10,"description":"Maximum results to return"},"query":{"type":"string","description":"Search term to match against agent names and descriptions"},"serviceType":{"type":"string","description":"Filter by service type (e.g., A2A, MCP, inference)"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_kiATFpzIA79YHhcNLfiY7","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0xD74f5255D557944cf7Dd0E45FF521520002D5748","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Searches for on-chain AI agents registered under the ERC-8004 standard by name, description, or service type on a specified blockchain","exampleAgentPrompt":"Search the ERC-8004 agent registry on BSC testnet for any A2A agents related to DeFi trading — show me up to 10 results.","exampleUseCases":[{"title":"Discover DeFi trading agents on-chain","prompt":"Search the ERC-8004 registry on BSC testnet for agents related to DeFi trading — I want to see up to 10 results so I can pick one to integrate into my workflow."},{"title":"Find MCP agents by service type","prompt":"Look up MCP-type agents on the BSC testnet blockchain in the ERC-8004 registry and return up to 5 matches so I can see what's available."},{"title":"Search for inference agents by keyword","prompt":"Search the on-chain ERC-8004 agent registry on BSC testnet for agents matching 'inference' — I need to find an AI inference agent I can call from my pipeline, show me up to 15 results."}],"resultDescription":"A list of on-chain AI agents matching the search criteria, including agent names, descriptions, service types, and blockchain registry metadata — up to the specified result limit.","failureModes":["No agents found matching the query — returns empty result set","Invalid chain identifier — chain not recognized or unsupported","Network timeout or RPC error connecting to the specified blockchain","Invalid serviceType filter value — unrecognized service type enum","Limit parameter out of range — request rejected or clamped"],"whenToPreferThis":"Use this endpoint when you need to discover AI agents registered on-chain via the ERC-8004 standard, especially when filtering by service type (A2A, MCP, inference) or searching by name/description keyword. Prefer this over off-chain agent directories when you need trustless, on-chain provenance of agent registrations on supported EVM networks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T06:43:22.131Z","isFirstParty":false,"canonicalSlug":"speraxos-erc-8004-agent-search-e5ca79c1"}