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POST
/
sendmessage.aspx
curl --request POST \
  --url https://secure.interactsms.com/api/v1/sendmessage.aspx \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data user=YOUR_USERNAME \
  --data password=YOUR_PASSWORD \
  --data api_id=1234 \
  --data to=353861234567 \
  --data 'text=Hello World' \
  --data from=YourCompany
"0\nRequest deferred successfully\n"

Body

application/x-www-form-urlencoded

Form fields accepted by the URL-encoded SMS API.

​
user
string
required
​
password
string<password>
required
​
api_id
integer
required
​
to
string
required

Destination mobile number in international format.

​
text
string
required
​
from
string
required

Sender address (alphanumeric or shortcode).

​
notify_id
string

Optional callback notification identifier.

​
deliverytime
integer

Unix timestamp or 0 for immediate delivery.

Response

200 - text/plain

API always returns HTTP 200. Body contains raw text response.

Raw text response. The first line contains the legacy status code; following text contains the result message.

Last modified on April 8, 2026