{"uid":"cap_RvEKw8CK7jUiaSyVSbuL8","slug":"agent-tools-api-lookup-dbf5d46f","name":"Agent Tools API Lookup","description":"Pay-per-call web tools for AI agents. No signup, no API key: pay USDC on Base or Solana per request via x402.","url":"https://agent-tools.faling-bot.workers.dev/api/api-lookup?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"api":{"type":"string","description":"API name, domain or docs URL"},"question":{"type":"string","description":"optional focus, e.g. 'how to create a payment'"}}},"responseSchema":{"type":"object","properties":{"api":{"type":"string"},"auth":{"type":"string"},"errors":{"type":"string"},"sources":{"type":"array"},"base_url":{"type":"string"},"openapi_url":{"type":"string"},"rate_limits":{"type":"string"},"llms_txt_url":{"type":"string"},"key_endpoints":{"type":"array"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1xvIVSLvG1WU4uZfiOgu1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Looks up API documentation, authentication methods, base URLs, key endpoints, and rate limits for any named API or domain","exampleAgentPrompt":"Look up the Stripe API for me — I need its base URL, authentication method, key endpoints, and rate limits, specifically focused on how to create a payment.","exampleUseCases":[{"title":"Discover auth method for unknown API","prompt":"I need to integrate with the SendGrid API but I'm not sure how authentication works — can you look it up and tell me what auth method they use and what the base URL is?"},{"title":"Find OpenAPI spec for integration","prompt":"I'm building a connector for the Plaid API — can you look it up and find the OpenAPI spec URL and any key endpoints related to linking bank accounts?"},{"title":"Research rate limits before heavy usage","prompt":"Before I start hammering the OpenAI API, can you look up what the rate limits are and where the official docs live so I don't get throttled?"}],"resultDescription":"Returns a structured object containing the API's base URL, OpenAPI spec URL, llms.txt URL, authentication details, key endpoints list, rate limit information, error documentation, and source references — giving an agent everything it needs to start calling the target API.","failureModes":["Unknown or obscure API name returns empty or partial fields","Docs URL is outdated or the API has no public documentation","Rate limit or auth info not publicly documented results in null fields","Mismatched API name (e.g. ambiguous brand names) returns info for wrong API","Payment fails or x402 protocol not supported by caller results in 402 error with no data returned"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to dynamically discover how to call an unfamiliar API — especially its auth method, base URL, and key endpoints — without requiring a human to supply documentation. Ideal for zero-setup agentic workflows where the agent must self-configure integrations on the fly. Less appropriate when the target API's docs are already embedded in the agent's context or when you need live API call execution rather than documentation lookup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:34:19.942Z","isFirstParty":false,"canonicalSlug":"agent-tools-api-lookup-dbf5d46f"}