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Invalid or revoked key
- Do not post the key anywhere.
- Open the provider's key dashboard and confirm the key is active.
- Create a replacement if needed.
- Clear the old key in Chronicle, save the replacement, and validate the model again.
Billing or credits required
Open the provider's billing page and confirm the API account, not a consumer chat subscription, has usable billing or credits. Anthropic commonly uses prepaid credits; OpenAI API billing is separate from ChatGPT; Google access depends on the project, region, tier, and selected model.
Quota or rate-limit error
Wait and retry after a short period. Reduce rapid saves while the queue catches up, select a lighter model, or request more capacity from the provider. Do not repeatedly validate the same model: validation itself makes a real request.