You need a Sendmux API key before sending authenticated requests. Create one
in the Sendmux app under API Keys.
Choose a collection
| Collection | Use it for | Run in Postman |
|---|---|---|
| Management API | Manage sending accounts, domains, mailboxes, webhooks, and logs. |  |
| Mailbox API | Read and manage one mailbox using a mailbox-scoped credential. | |
| Sending API | Send single or batch emails through the Sending API. | |
Import by URL
1
Open import
In Postman, select Import, then choose Link.
2
Paste the collection URL
Paste the URL for the collection you want to use, then select Continue.
3
Confirm the import
Review the collection name, then select Import.
Collection import URLs
Configure authentication
Each collection uses asendmux_api_key collection variable.
1
Open collection variables
In Postman, open the imported collection, then select Variables.
2
Set the API key
Set
sendmux_api_key to your smx_ API key.3
Save changes
Select Save before running requests.
Base URL variables
The collections include these base URL variables:
Change a base URL only if Sendmux support asks you to use a different endpoint.
Update a collection
Re-import the same URL when you want the latest requests. The collection files use the same API descriptions as the Sendmux reference docs.Next steps
Management API
Read authentication, permissions, response formats, and rate limits.
Mailbox API
Use a mailbox-scoped credential for one mailbox.
Sending API
Send email through the HTTP API.
API keys
Create scoped keys for applications and integrations.