# Anthropic

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The Anthropic provider authenticates the **Claude Code and opencode agents** with an Anthropic API key from your own Anthropic account. Usage is billed by Anthropic directly.

If you're new to configuring providers, start with the [LLM Providers](/docs/ai-providers/llm-providers/) overview — it covers where the settings live, how keys are stored, and how rotation works for every provider.

## Adding an Anthropic key

1. Create a key at <a href="https://platform.claude.com/settings/keys" target="_blank" rel="noopener noreferrer">platform.claude.com/settings/keys</a>. Copy it — Anthropic only shows it once.
2. In the dashboard, go to **Organization Settings → Agents → LLM Providers**.
3. On the **Anthropic Direct** card, paste the key into the **API key** field. It starts with `sk-ant-api03-`.
4. Optionally click the eye icon to unmask the field and confirm you pasted the whole key.
5. Click **Save**.

You'll get an "Anthropic Direct saved" confirmation, and the field collapses to a masked display.

## Rotating

Click **Replace** next to the masked key, paste the new one, and save. The existing key stays active until the new one is saved — see [Rotating a key](/docs/ai-providers/llm-providers/#rotating-a-key). **Remove** deletes the credential entirely.

## Troubleshooting

- **"API key looks too short"** — you probably copied a partial value. Anthropic console keys are around 100 characters. Re-copy the whole key.
- **A Task fails with an authentication error** — the saved key may have been revoked or may have hit a spend limit. Check the key's status in the Anthropic console, then rotate it using **Replace**.
- **Runs fail after switching agents** — the Anthropic key serves the Claude Code and opencode agents. If you've switched to the Codex agent, configure [OpenAI](/docs/ai-providers/openai/) as well; agents never fall back to another provider's key.

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Source: https://deployment.io/docs/ai-providers/anthropic/