# The Postal Company

## Docs

- [Get a Letter](https://docs.thepostalcompany.com/api-reference/get-letter.md): Retrieve a single letter by its ID.
- [List Letters](https://docs.thepostalcompany.com/api-reference/list-letters.md): List all letters for your account.
- [Send a Draft](https://docs.thepostalcompany.com/api-reference/send-draft.md): Send a draft letter for printing and postal delivery.
- [Create a Letter](https://docs.thepostalcompany.com/api-reference/send-letter.md): Create a letter as a draft or send it immediately.
- [Update a Draft](https://docs.thepostalcompany.com/api-reference/update-letter.md): Update a draft letter's content, address, or recipient.
- [Authentication](https://docs.thepostalcompany.com/authentication.md): How to authenticate with The Postal Company API using API keys.
- [Credits & Billing](https://docs.thepostalcompany.com/guides/credits.md): How the credit system works for sending letters.
- [Introduction](https://docs.thepostalcompany.com/index.md): Send physical letters programmatically with The Postal Company API.

## OpenAPI Specs

- [openapi](https://docs.thepostalcompany.com/api-reference/openapi.json)