{"uid":"cap_uwhhkGWJXMvdQImk8XmUd","slug":"shoal-api-signal-by-category-500b2503","name":"Shoal API – Signal by Category","description":"Pay-per-request API access with no API key required.","url":"https://api.shoal.xyz/v1/signal/byCategory?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"required":{"type":"string"},"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"data":[]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.025","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.025/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.025","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.025","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iP-gmXzUFfmEAy67VmN8D","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.025","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves signal data filtered by a specified category via pay-per-request access with no API key required.","exampleAgentPrompt":"Can you pull the latest signals from Shoal for the 'crypto' category and show me what comes back?","exampleUseCases":null,"resultDescription":"A JSON object containing a data array of signals belonging to the requested category. The array may be empty if no signals are found for that category.","failureModes":["Payment not received — 402 response if USDC micropayment is not processed","Invalid or missing category parameter — empty data array or error response","Category not found — returns empty data array","Network timeout — no response from api.shoal.xyz","Malformed request parameters — server-side validation error"],"whenToPreferThis":"Use this endpoint when you need on-demand, pay-per-request signal data filtered by category and do not want to manage API key subscriptions. Ideal for agents that need occasional or low-frequency signal lookups and prefer micropayment-based access via the x402 protocol.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T18:37:03.300Z","isFirstParty":false,"canonicalSlug":"shoal-api-signal-by-category-500b2503"}