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POST
/
suppressions
Add to suppression list
curl --request POST \
  --url https://api.sendkit.dev/suppressions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "blocked@example.com"
}
'
{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "email": "jsmith@example.com",
  "created_at": "2026-03-03 10:00:00",
  "updated_at": "2026-03-03 10:00:00",
  "reason": "manual"
}

Authorizations

​
Authorization
string
header
required

API key from your SendKit dashboard. Pass it as a Bearer token in the Authorization header.

Body

application/json
​
email
string<email>
required

The email address to suppress.

Maximum string length: 255
Example:

"blocked@example.com"

Response

Email already exists in the suppression list

​
id
string<uuid>
required

Unique identifier for the suppression entry.

​
email
string<email>
required

The suppressed email address.

​
created_at
string
required

When the entry was created.

Example:

"2026-03-03 10:00:00"

​
updated_at
string
required

When the entry was last updated.

Example:

"2026-03-03 10:00:00"

​
reason
enum<string> | null

The reason the email was suppressed.

Available options:
manual,
bounce,
complaint,
null