{"uid":"cap_qhxqXeCdNw4QQPBstbbCg","slug":"signalharness-search-query-variant-generator-rules-based-8cae1bc5","name":"SignalHarness Search Query Variant Generator (Rules-Based)","description":"Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.","url":"https://signalharness.ai/api/agent/services/search_query_variant_generate_rules_based/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"request_json":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["Verify the caller-supplied data before relying on this result."],"service_id":"search_query_variant_generate_rules_based","analysis_json":"{\"example\":\"schema-valid caller-supplied data\"}","evidence_scope":"caller_supplied_data"},"status":"succeeded","receipt":{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","usage":[],"status":"succeeded","network":"eip155:8453","artifacts":[],"endedAtMs":0,"latencyMs":0,"paymentId":"example-payment","receiptId":"example-receipt","requestId":"example-request","serviceId":"search_query_variant_generate_rules_based","executionId":"example-execution","startedAtMs":0,"amountAtomic":"10000","resultSha256":"f843fd3c26e1c7e3c2652996c52547569da396d1fc8b5dfe29dde86c36e3cd87","serviceVersion":"1.0.0","settlementReference":"0x0000000000000000000000000000000000000000000000000000000000000000"},"artifacts":[],"requestId":"example-request","executionId":"example-execution"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_HDer5RjChD-Z7xEaxhD1p","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates rules-based variants of search queries to broaden or diversify search coverage without using ML/AI inference.","exampleAgentPrompt":"Can you take my search query 'running shoes for flat feet' and generate a set of rules-based variant queries I can use to broaden my search results coverage?","exampleUseCases":[{"title":"E-commerce search query expansion","prompt":"I have a product search query 'wireless headphones noise cancelling' — can you generate a bunch of rules-based variant queries from it so I can improve the search coverage in my store's catalog?"},{"title":"SEO keyword variant generation","prompt":"Take my target keyword 'best coffee maker under 100 dollars' and produce rules-based query variants I can use to test different search intents for my SEO campaign."},{"title":"Search A/B testing preparation","prompt":"I want to run A/B tests on our internal search engine — can you generate rules-based variants of the query 'leather office chair ergonomic' so I have multiple query forms to test against?"}],"resultDescription":"Returns a JSON object containing an analysis_json field with the generated query variants, a list of warnings (e.g. to verify caller-supplied data), a service_id, evidence_scope, and a payment receipt with execution metadata including payment ID, request ID, latency, and a result SHA256 hash for integrity verification.","failureModes":["Invalid or malformed request_json input causes processing failure","request_json exceeding 65536 characters is rejected","Empty or too-short input (below 2 characters) is rejected","Payment not received results in 402 response before execution","Caller-supplied data may produce unverified variants — warnings are returned advising manual verification"],"whenToPreferThis":"Choose this endpoint when you need deterministic, rules-based query expansion without relying on probabilistic ML models — ideal for reproducible, auditable query generation pipelines. Prefer it over AI-based query expansion when consistency and rule transparency matter, or when you want low-cost ($0.01 USDC) per-call query diversification via a pay-per-call x402 API.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:30:45.209Z","isFirstParty":false}