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Troubleshooting

Structured Outputs 400 Errors: Fix strict JSON Schema Before Retrying

Check endpoint wrappers, required and nullable fields, nested object definitions and common strict JSON Schema errors locally before retrying an API request.

2026-10-13 5

LLM API Editorial Team

Troubleshooting

Tool Call ID Errors: Match Results Across OpenAI and Claude APIs

Trace mismatched tool results across Chat Completions, Responses and Anthropic Messages with synthetic JSON, offline checks and history-trimming diagnostics.

2026-10-13 5

LLM API Editorial Team

Troubleshooting

API Returns 200 but No Text? A Streaming Troubleshooting Guide

Diagnose empty API answers by checking response events, completion and client parsing. Includes a small Python regression example and a safe support checklist.

2026-09-20 3

LLM API Editorial Team

Troubleshooting

Fix a Claude Code Connection Error or Timeout: A Diagnostic Ladder

A Claude Code connection error or timeout usually has a boring cause. Here's the diagnostic ladder to tell a real network/config fault from the model thinking.

2026-06-06 7

Yazhou Hu

Troubleshooting

Fix Claude Code 429 "Rate Limit Exceeded": Complete Triage Guide

Step-by-step triage for Claude Code 429 errors. Learn the three types of rate limits, how to read headers, short-term workarounds, and the structural fix via a multi-provider relay.

2026-04-23 9

Yazhou Hu