Lettermint Team API

Download schema

API for managing your Lettermint team, projects, domains, webhooks, and more. Authenticate using your Team API token via Bearer authentication.

Tags

Check that the API is reachable and look up the attachment types Lettermint rejects.

Read and update team settings, follow usage against your plan, and manage member roles and access.

Retrieve aggregated sending statistics for your team across a period.

Query recipient metrics, time series, and grouped results for your team.

Add sending domains, verify their DNS records, and control which projects are allowed to use them.

Create projects, rotate their API tokens, and configure the routes that handle outbound and inbound mail.

Register webhook endpoints, rotate signing secrets, send test events, and inspect delivery attempts.

Look up sent messages, follow their delivery events, and retrieve the original source, HTML or text body.

List suppressed recipients, add addresses or domains yourself, and remove entries once they can be mailed again.

Security Schemes

TeamApiToken

Team API token. Find this in your team settings.

http

SendingApiToken

Project API token for the project sending email. Create one in your project settings.

apiKey

Servers

https://api.lettermint.co/v1