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REST API and OpenAPI spec

The REST API behind every skill and SDK. Use the OpenAPI spec for toolchains, validation, and client generation.

API

Available

Contacts

POST /contacts/create

Add a contact to your audience

PUT /contacts/update

Update a contact by email or userId

GET /contacts/find

Find a contact by email or userId

POST /contacts/delete

Delete a contact

Events

POST /events/send

Send an event to trigger automations and lifecycle flows

Transactional emails

POST /transactional

Send a transactional email with data variables and attachments

GET /transactional

List published transactional emails (paginated)

Mailing lists

GET /lists

Get all mailing lists with id, name, description, and visibility

Contact properties

POST /contacts/properties

Create a contact property (name must be camelCase)

GET /contacts/properties

List all or custom contact properties

Suppression

GET /contacts/suppression

Check suppression status and removal quota for a contact

DELETE /contacts/suppression

Remove a contact from the suppression list (quota-limited)

Other

GET /api-key

Test your API key, returns team name

GET /dedicated-sending-ips

Get your dedicated sending IP addresses

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Resources

Changelog

Engineering

Glossary

Guides

Connect

Email

LinkedIn

Threads

𝕏

Company

About

Careers

Credits

Customers

Product

Pricing

Docs

Templates

Examples

© 2026 Astrodon Inc.

Privacy

Terms

Trust

DPA

DPF

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