Keys & Settings

API keys in FastRouter allow granular control over access, usage, and budget. You can generate multiple keys with custom configurations for different users, projects, or integrations.

Create/Edit Key

Types of API Keys

FastRouter supports two key types for different use cases:

User-Owned API Keys

• Tied to individual users.

• Can be created by any project member.

• Inherits the user’s project-level permissions.

• Best suited for development, experimentation, or scoped access within a specific project.

Service Account Keys (Coming Soon)

• Managed at the project level.

• Not tied to an individual user.

• Designed for application-level integration.

Creating an API Key

When you create a key, FastRouter generates a one-time visible token. Be sure to copy and save it securely — it cannot be retrieved later.

Key Settings

Key Name

• A custom label to help you identify the key.

Optional Settings

Budget Controls

• Set a maximum spend in USD for the key.

• Leave blank for unlimited usage.

Reset Budget

• Define when the budget resets:

  • Never (default)

  • Daily, Weekly, Monthly

Select Models

• Choose which LLM models the key can access.

• Default: All Selected under the Project.

Tokens Per Minute Limit (TPM)

• Limit how many tokens this key can consume per minute.

• Project level settings cap this limit.

Requests Per Minute Limit (RPM)

• Set the maximum number of requests this key can send per minute.

• Project level settings cap this limit.

Expire Key

• Schedule a date and time for the key to automatically expire.

• Useful for temporary access or testing.

Best Practices

• Rotate keys periodically and revoke unused keys.

• Use budget + rate limits to protect from accidental overuse.

• Tag keys by project to stay organized.

• Assign specific model access for tighter control.