Anthropic experienced a brief but widespread service disruption on February 3, when its Claude platform went offline and triggered API failures for developers worldwide. The outage affected Claude Code and all Claude models accessed through the API, with users reporting persistent HTTP 500 errors during the incident.
According to Anthropic’s status update, the company detected elevated error rates across its infrastructure and moved quickly to isolate the root cause. Engineers deployed a fix within roughly 20 minutes, restoring access to Claude Code and normal API operations shortly afterward.
Claude Code and API Access Were Fully Impacted
The outage did not hit a single product or region. Developers reported failures across all Claude-powered tools, including Claude Code integrations used in IDEs and automated workflows. Because Claude Code relies entirely on cloud-based inference, the disruption immediately blocked code generation, debugging, and review tasks.
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Several developers turned to social platforms to confirm the issue, while others monitored Anthropic’s status page for updates. For teams that depend on Claude Code as part of daily development pipelines, even a short outage caused noticeable workflow interruptions.
All Claude API Error Codes
During the outage, developers encountered standard Claude API errors tied to service-side instability. The table below provides a complete breakdown of the error codes and what each one means.
| HTTP Code | Error Type | What It Means |
|---|---|---|
| 400 | invalid_request_error | The request format or content is incorrect, such as malformed JSON or missing required fields. |
| 401 | authentication_error | The API key is missing, invalid, expired, or incorrectly configured. |
| 403 | permission_error | The API key does not have permission to access the requested resource or model. |
| 404 | not_found_error | The requested endpoint, model, or resource does not exist. |
| 413 | request_too_large | The request exceeds the maximum allowed payload size for the API. |
| 429 | rate_limit_error | The account has exceeded request or acceleration rate limits. |
| 500 | api_error | An internal server error occurred within Anthropic’s systems. |
| 529 | overloaded_error | The API is temporarily overloaded due to high traffic across users. |
Claude Code is now fully operational, and Anthropic has confirmed that services have returned to normal.
