{"uid":"cap_6RK9md7o9yNZ23XLJbzi0","slug":"fastapi-online-error-explain-ed2eacae","name":"fastapi.online — Error Explain","description":"Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.","url":"https://api.fastapi.online/error-explain","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"error_text":{"type":"string","maxLength":20000,"minLength":1}}},"responseSchema":null,"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":"down","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_ybGQ3SQM5aAT826y89HCV","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":"Analyzes an error message or stack trace and returns a plain-language explanation with likely causes and suggested fixes","exampleAgentPrompt":"Can you explain what this error means and how to fix it: 'TypeError: Cannot read properties of undefined (reading map) at App.js:42'?","exampleUseCases":[{"title":"Debugging a Python runtime crash","prompt":"I keep getting this error in my Python script: 'AttributeError: NoneType object has no attribute split' — can you explain what's causing it and how I should fix it?"},{"title":"Understanding a cryptic compiler error","prompt":"My Rust build is failing with 'error[E0502]: cannot borrow x as mutable because it is also borrowed as immutable' — what does this actually mean and what do I need to change?"},{"title":"Diagnosing a production exception","prompt":"Our server logs are showing this stack trace: 'java.lang.NullPointerException at com.example.UserService.getUser(UserService.java:87)' — can you explain what's going wrong and suggest a fix?"}],"resultDescription":"A plain-language explanation of the error including what the error means, its likely root cause, and actionable suggestions for resolving it, generated by a self-hosted AI model.","failureModes":["Empty or whitespace-only error_text returns validation error","error_text exceeding 20,000 characters is rejected","Vague or incomplete error snippets may yield generic or low-confidence explanations","Payment not included or insufficient USDC triggers 402 response"],"whenToPreferThis":"Choose this endpoint when you need a quick, cheap ($0.001 USDC), no-signup AI-powered explanation of any error message, stack trace, or exception — especially useful in automated CI/CD pipelines, developer bots, or coding assistants that need on-demand error diagnosis without sending data to a large third-party LLM provider.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T09:26:12.316Z","isFirstParty":false}