> ## Documentation Index
> Fetch the complete documentation index at: https://wb-21fd5541-docs-sandboxes-integrations-placement.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# API Keys

<Card title="Why does my API key fail with 'must be 40 characters long'?" href="/support/models/articles/why-does-my-api-key-fail-with-must-be-40-characters" arrow="true" horizontal>
  W\&B now issues longer API keys (about 86 characters). Older wandb SDK versions validate exactly 40 characters and reject ...
</Card>