{"uid":"cap_0p4K40tozsssRf8tjLUEr","slug":"fastapi-online-api-error-message-improver-b54a64ac","name":"fastapi.online — API Error Message Improver","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/api-error-message-improve","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"error_message":{"type":"string","maxLength":2000,"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_vwHhL4lJODIpkkBco3KjG","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":"Takes a raw API or software error message and returns a clearer, more actionable, human-readable version of it","exampleAgentPrompt":"Can you improve this error message so it's clearer and more actionable for developers: 'NullPointerException at com.example.service.UserService.getUser(UserService.java:42)'?","exampleUseCases":[{"title":"Friendlier API error responses","prompt":"I have this raw error my API throws: 'Connection refused: ECONNREFUSED 127.0.0.1:5432' — can you rewrite it into something clearer that my users will actually understand?"},{"title":"Debugging cryptic exception messages","prompt":"This error keeps showing up in my logs and I can't figure out what it's telling me: 'java.lang.IllegalStateException: Queue full'. Can you improve it so it's more descriptive and tells me what I should do next?"},{"title":"Polishing error UX in a developer tool","prompt":"I'm building a CLI tool and the error messages are too technical. Can you rewrite 'ETIMEDOUT: connection timed out, connect ETIMEDOUT 8.8.8.8:443' into something friendlier and actionable for my users?"}],"resultDescription":"A rewritten, improved version of the submitted error message — clearer, more human-readable, and ideally more actionable, helping developers or end users understand what went wrong and what to do about it.","failureModes":["Empty or whitespace-only error_message returns a validation error","Error messages exceeding 2000 characters are rejected","Highly domain-specific or proprietary error codes may not be improved meaningfully","Payment failure or 402 status if no valid crypto payment or API key is provided"],"whenToPreferThis":"Choose this endpoint when you need a quick, cheap ($0.001 USDC), no-signup solution for transforming cryptic or verbose error messages into clear, user-friendly text. Ideal for developer tools, API wrappers, or applications that want to surface better error UX without building a custom LLM pipeline. Prefer over general-purpose LLMs when you want a pay-per-call, no-account-required approach via crypto payment.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T09:27:06.179Z","isFirstParty":false}