API & Developer Documentation
The thanks.io REST API and full developer documentation — including authentication, API tokens, webhooks, rate limits, code examples, and endpoint references — is hosted at:
Generate an API Key
You can generate an API key at any time by clicking the gear icon at the top right of your dashboard and selecting API Access.
Authorization Headers
When making API calls or setting up webhooks, use the following headers to authorize your connection.
API Test Mode
API Test Mode can be enabled or disabled in your API settings. When test mode is on, any orders placed via Zapier or the API will be automatically cancelled. This lets you test your integration without placing real orders.
Finding Template & List IDs
When using the API, you will often need to reference specific IDs for mailing lists, image templates, and message templates.