# sendletter

> Send physical letters anywhere in Canada from any digital device. API accessible.

sendletter prints and mails letters via Canada Post within 1 business day. Starting at $3.79 CAD (printing and tax included). No account needed for the website; API access requires an account with a payment method.

## API

sendletter has a REST API for programmatically sending physical letters.

- Endpoint: POST https://sendletter.app/api/v1/send
- Auth: Bearer token (API key starting with sl_live_)
- Docs: https://sendletter.app/docs
- OpenAPI: https://sendletter.app/openapi.json
- Full reference for LLMs: https://sendletter.app/llms-full.txt

### Modes
- **draft**: Structured letter fields (date, salutation, body, closing, signature, etc.)
- **formatted**: Custom HTML/CSS content
- **upload**: Base64-encoded PDF or DOCX file

### Pricing (CAD, includes printing, postage + tax)
- Standard (tri-fold, #10 envelope): $3.79
- Large (flat, 9×12 envelope): $5.78
- Legal (flat 8.5×14, 10×15 envelope): $5.78

### Constraints
- Delivery: Canada only (to.country must be "CA")
- From address: any country
- Canadian postal codes: FSA format minimum (A1A or A1A 1A1)
- File upload: max 10 MB
- Max 15 pages
- Billing: daily, charged to saved payment method

## Getting Started
1. Create account: https://sendletter.app/signup
2. Add payment method and generate API key: https://sendletter.app/profile
3. Send a letter via POST /api/v1/send

## Links
- Website: https://sendletter.app
- API Docs: https://sendletter.app/docs
- OpenAPI Spec: https://sendletter.app/openapi.json
- Terms: https://sendletter.app/terms
- Contact: support@sendletter.app