
Fix Claude Code MCP Errors: 401, 403 and Connection Issues
Learn how to debug Claude Code MCP failures, including 401, 403, OAuth, timeout, endpoint and protocol errors.

Learn how to debug Claude Code MCP failures, including 401, 403, OAuth, timeout, endpoint and protocol errors.

Connect Kimi K3 to Python, Claude Code, Cline, and Cherry Studio with correct model IDs, base URLs, and fixes.

Connect DeepSeek to Claude Code on Windows, fix ccswitch ConnectionRefused errors, and verify models with PowerShell.

DeepSeek V4 Flash and Pro tested: legacy model retirement, Thinking Mode, API compatibility and migration tips.

Learn the 7-step production workflow for Gemini multimodal API integration, covering file validation, prompt design, model selection, output checks and pre-launch checklist.

Explore the 1M context window, Agent verifier loops, and SWE benchmarks with GPT-5.5. Deploy now via 4SAPI.com.
In-depth insights on LLM frontier tech, API gateway solutions and enterprise practice.
Stay current with 4SAPI release notes and industry deep dives.