{"uid":"cap_9-FjJMph7cVr5wN_KMT5x","slug":"one-engine-query-builder-cc1e3220","name":"ONE Engine Query Builder","description":"Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.","url":"https://one-search.one-engine.workers.dev/v1/query/build?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"value":{"type":"object"}}},"responseSchema":{"type":"json","example":{"query":"q=ONE+Engine&page=2"}},"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_2qP_8HCZ4ZCVzYxgc68S5","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Builds a structured search query string from a value object for use with the ONE Engine search API.","exampleAgentPrompt":"Build me a ONE Engine search query from these parameters: search for 'autonomous agents x402' on page 2.","exampleUseCases":[{"title":"Paginated agent search query","prompt":"I need to search ONE Engine for 'crypto payment APIs' starting on page 3 — can you build the query string for me?"},{"title":"Multi-field query construction","prompt":"Take these search fields — keyword 'base blockchain tools', category 'utility', and sort by relevance — and build me a ONE Engine query string I can use."},{"title":"Repeatable search automation","prompt":"I'm running an automated agent that needs to search ONE Engine for 'x402 pay-per-call APIs' every hour — build me the reusable query string for that search."}],"resultDescription":"A JSON response containing a formatted query string (e.g. 'q=ONE+Engine&page=2') suitable for use as URL query parameters in a ONE Engine search request.","failureModes":["Missing or malformed value object in request body returns an error or empty query","Unexpected field types in the value object may produce malformed query strings","Network or worker-side errors may return 5xx responses","Payment failure via x402 protocol results in 402 Payment Required before query is built"],"whenToPreferThis":"Use this endpoint when you need to programmatically construct well-formatted query strings for ONE Engine searches, especially in agentic workflows where search parameters are dynamic or derived from prior steps. Prefer this over manual string concatenation to ensure correct URL encoding and formatting.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T12:43:19.811Z","isFirstParty":false,"canonicalSlug":"one-engine-query-builder-cc1e3220"}