{"uid":"cap_hwPYpVnHffC3JPjUCasdz","slug":"spyfu-d6f6654b","name":"SpyFu Related Keywords API","description":"GET /apis/keyword_api/v2/related/getRelatedKeywords","url":"https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getRelatedKeywords","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object","additionalProperties":true}},"additionalProperties":false}},"additionalProperties":false},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"down","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_u0eSQGmFHnmmAVn6BqPou","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns related keywords for a given seed keyword using SpyFu's keyword relationship data","exampleAgentPrompt":"What keywords are related to 'project management software' according to SpyFu? I want to expand my SEO keyword list.","exampleUseCases":[{"title":"Expand PPC campaign keyword coverage","prompt":"Can you find all the related keywords for 'fitness tracker' that I should add to my Google Ads campaign? I want to capture more relevant search traffic."},{"title":"Build content clusters for SEO strategy","prompt":"Help me discover keywords related to 'sustainable packaging' so I can plan a content series that covers the whole topic cluster. What variations should I target?"},{"title":"Identify user search intent variations","prompt":"What keywords does SpyFu show as related to 'remote work tools'? I need to understand what else my target audience is actually searching for beyond the main term."}],"resultDescription":"A list of related keywords associated with the input seed keyword, drawn from SpyFu's keyword relationship database, useful for expanding SEO campaigns and content strategy.","failureModes":["Missing required query parameters returns an error or empty result","Invalid keyword input may return no related keywords","Payment failure via x402 prevents API access","Rate limiting if too many requests are made in quick succession"],"whenToPreferThis":"Use this endpoint when you need to discover semantically or contextually related keywords for a given seed term, particularly for SEO expansion, content clustering, or paid search campaign broadening. Prefer this over competitor-focused endpoints when the goal is keyword discovery rather than competitive analysis.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":2,"lastUsedAt":"2026-05-02T17:28:08.461Z","lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:35:06.549Z","isFirstParty":false}