Version: 3.15.0

Handwrytten API

About

Send personalized, handwritten cards to anyone using the Handwrytten API. Choose from a variety of handwriting styles, customize cards with your logo, and automate your card-sending workflow at any scale.

Test Mode

During development your account can be switched to test mode on the Integrations page in your dashboard. In test mode, orders are accepted normally but are not fulfilled. Payments are authorized but not captured, so any pending charge will drop off without posting. Just make sure to switch back to live mode before going live.

Client Libraries

If you're working in Python or JavaScript/TypeScript, you can use one of the official client packages instead of making raw API calls:

• Python: handwrytten on PyPI
• JavaScript/TypeScript: handwrytten on npm Documentation for each package is available on the respective package page.

Authentication

Authenticate by including your API key in the Authorization request header — pass the key directly, with no Bearer: prefix:

Authorization: YOUR_API_KEY

API keys can be created and managed on the Integrations page in your dashboard.

Note: Authentication using login/password via /auth/authorization is deprecated. It remains supported for existing integrations but is not recommended for new ones.