API Error: Repeated 529 Overloaded errors | The Claude API is at capacity for the model you are using; it is not your usage limit. | Heavy load | Wait a few minutes and retry, or run /model to switch models, since capacity is tracked per model. Source |
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API Error: 500 Internal server error | An unexpected failure inside the API, not caused by your prompt, settings or account. | An outage | Try again in a moment and check status.claude.com if it persists. Source |
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You've hit your session limit · resets 3:45pm | Your subscription's rolling usage allowance is used up until the time shown. | Your side | Wait for the reset; a weekly or model-specific limit shows similar wording. Source |
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Credit balance is too low | Claude Code is billing an API key whose prepaid credits ran out. | Your side | Add credits in the Console, or on a Pro or Max plan unset ANTHROPIC_API_KEY and run /login so your subscription is used. Source |
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Not logged in · Please run /login | Claude Code has no valid credentials for this session. | Your side | Run /login and sign in again. Source |
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Unable to connect to API | Claude Code could not reach Anthropic's servers from your machine, often because of a proxy, firewall or lost connection. | Your side | Check your internet connection, proxy and firewall settings, then retry. Source |
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