API keys are bearer tokens for the JupiterInvoice REST API and the MCP server, so you can drive your account from your own code or an AI agent.
Step 1: Open Integrations
Sign in and go to the Integrations page.
Step 2: Go to the API keys section
Scroll to the API keys section. It notes that each key is shown once at creation and revoked keys can't be undone.
Step 3: Name your key
In the Key name field, type something recognizable, for example "Local development" or "Production agent".
Step 4: Generate it
Click Create API key. The key is minted right away.
Step 5: Copy the secret now
The full key appears once in a highlighted box. Click Copy to grab it. After you leave or refresh the page, only the key prefix stays visible, so save it before navigating away.
Step 6: Manage keys later
Existing keys are listed below with their name, prefix, last used, and created dates. Use Revoke to disable any key (this can't be undone).