OpenAI API Developer Hub

A focused hub for debugging OpenAI API request bodies, JSON payloads, model-parameter mismatches and AI coding agent prompts.

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Practical checklist

  • Validate JSON before debugging SDK behavior.
  • Compare the selected model family with token, reasoning and response_format fields.
  • Keep one minimal cURL request as a reproducible baseline.

Tools

OpenAI OpenAI API Request Checker

Statically inspect an OpenAI API request body for common JSON and parameter mistakes before sending it to the API.

Open tool JSON JSON Validator and Formatter

Validate JSON, format it for reading, or minify it for compact API payloads without sending data to an external API.

Open tool cURL cURL Command Builder

Build readable cURL commands for API requests with method, headers, JSON body and safe auth placeholders.

Open tool Prompt AI Prompt Debugger

Analyze coding-agent prompts for missing context, vague goals, unsafe instructions, unclear outputs and weak verification steps.

Open tool HTTP HTTP Status Code Explainer

Explain common HTTP status codes with likely causes, API debugging notes and practical verification commands.

Open tool

Error fixes

OpenAI OpenAI max_tokens vs max_completion_tokens Error

This error usually appears when a request body mixes parameters from different OpenAI model families. Validate JSON first, then align token fields with the target model.

Open fix OpenAI OpenAI invalid_request_error Fix

invalid_request_error means the API understood the request but rejected its shape or parameters. Reduce to a minimal valid request first.

Open fix OpenAI OpenAI Context Length Exceeded Fix

Context length errors happen when the request input, instructions, tools and expected output exceed the model context window.

Open fix OpenAI OpenAI response_format JSON Schema Fix

response_format errors usually mean the request JSON parses, but the structured-output schema does not match the API shape.

Open fix OpenAI OpenAI 429 Rate Limit Fix

429 means requests are being limited by quota, rate, concurrency or burst behavior. Treat it as a control-flow problem, not a JSON problem.

Open fix JSON JSON Unexpected Token Error Fix

Unexpected token errors mean the parser found a character that is not valid at that position. Often the input is not JSON at all.

Open fix

Examples

OpenAI OpenAI API JSON Request Example

A compact request-body example for debugging OpenAI API calls. Use it as a starting point, then validate parameters against the target model family.

Open example cURL cURL POST JSON Example

Use this example to separate API behavior from frontend, SDK or framework code.

Open example JSON JSON API Payload Example

A small JSON payload example that works with strict parsers. Useful for testing API clients and cURL commands.

Open example

Guides

OpenAI Debug OpenAI API Request JSON Before Sending

Most API request bugs are easier to fix before the request is sent. Start with valid JSON, then check model-family parameters and only then debug application code.

Read guide cURL cURL API Debugging Workflow for Developers

cURL is the simplest way to separate API behavior from SDK, framework or frontend code. Build a minimal request first, then compare it with the failing implementation.

Read guide HTTP Debug HTTP 429 Rate Limit Errors

A 429 response means the request was understood but rate limited. The fastest fix is to inspect headers, reduce concurrency and prove the behavior with a minimal request.

Read guide