post
https://api.salesautopilot.com/v2/newsletter//subscriber
Subscribes a new contact to the given list.
form_id (optional)
If form_id is provided, the subscription runs through that form's full pipeline:
double opt-in confirmation emails, Facebook pixel, form-level automations, etc.
If form_id is omitted (or 0), the contact is subscribed at list level without
form-specific behaviour.
Multipart / file upload
The endpoint also accepts Content-Type: multipart/form-data for lists that have
file-upload fields. File fields receive the uploaded filename as their value.
Error codes
| Code | Meaning |
|---|---|
| 10100 | email field is missing from the request body |
| 18001 | Email address format is invalid |
| 18000 | Email address already exists on this list |
| 18003 | Trial account subscriber limit reached |
| 18004 | Account is disabled |
Recent Requests
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| Time | Status | User Agent | |
|---|---|---|---|
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