Hermes Agent Anthropic API Key Setup and Rotation

Where do you create an Anthropic API key?

In the Anthropic developer console under API keys. Create a separate key per deployment so usage and revocation stay attributable to one assistant.

• Use one key per Hermes Agent deployment, not one key for everything.
• Name the key after the deployment so the console list stays readable.
• Copy the value once; the console will not show it again.
• Store it in the deployment configuration rather than a shared note.

Do you need a paid Anthropic account?

API access is billed separately from any consumer Claude subscription. You need billing enabled on the API account, and usage is charged per token rather than per seat.

Set the spend limit before the first deploy. A limit is the cheapest protection against a loop, a leaked key, or an unexpectedly expensive workflow.

Which errors mean the key is the problem?

Authentication failures, permission errors, and quota-exceeded responses point at the key or the account. Timeouts and connection resets point at the network instead.

• An authentication error means the key is wrong, revoked, or truncated.
• A permission error usually means the key's workspace cannot use the model.
• A quota error means the spend limit or the account balance was reached.
• A timeout means the request never reached the provider.

How do you keep an API key safe?

Store it only in the deployment's protected configuration, restrict who can read it, and rotate on a schedule or immediately after any suspected exposure.

A key pasted into a chat message, a screenshot, or a public repository should be considered compromised. Rotation is fast; an unexpected bill is not.

How do you rotate the key without downtime?

Create the new key first, deploy it, verify that requests succeed, and then revoke the old key. Doing it in that order avoids a window where the assistant cannot reach the provider.

Two keys can exist for a short period, which is exactly what makes the change safe. Deleting first and creating second is what causes the outage.