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POST
/
text
cURL
curl --request POST \
  --url https://api.contiguity.com/send/text \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "to": "+1234567890"
}
'
{
  "id": "req_xxxxxxxxxxxxxxxx",
  "timestamp": 1772129047728,
  "api_version": "v2026.2.26",
  "object": "response",
  "data": {
    "message_id": "text_1234567890"
  }
}
MMS is in public beta. We’re still understanding the limits of our implementation – if you encounter any issues, join our Discord!Note: MMS is limited to 5MB (cumulative), across 3 attachments.
Contiguity will fully support jpeg/jpg, png, and gif. We will accept & attempt to send a number of other content types, however depending on the carrier and device of the end user these messages may not be successfully received.
Confirmed file types that work:
  • Images (JPEG, JPG, PNG, GIF)
  • Videos (MP4, MOV)
  • Audio (MP3)
  • Documents (PDF)
File types that experience issues:
  • WEBP
  • Some images?
  • SVGs
This endpoint is the same as Send SMS. To send attachments, pass them in the attachments parameter.

Authorizations

​
Authorization
string
header
required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body

application/json
​
to
string
required

Recipient's phone number. Must be in E.164 format

Example:

"+1234567890"

​
from
string | null

If you lease a phone number from Contiguity, you can use a specific one by providing it here.

Example:

"+15555555555"

​
message
string

Message to send. Required unless attachments are provided.

Example:

"Hello, world!"

​
attachments
string[] | null

Attachments to send. Must be HTTPS-secured URLs with file extensions. Max 3 attachments, 5MB cumulative size.

Maximum array length: 3
Example:
["https://example.com/image.png"]
​
fast_track
boolean

Fast-track your request (bypassing any recommended rate limiting). Only available on leased numbers. Requires acceptance of the Fast Track Terms.

Response

Send a text message

​
id
string
required
Example:

"req_xxxxxxxxxxxxxxxx"

​
timestamp
number
required
Example:

1772129047728

​
api_version
string
required
Example:

"v2026.2.26"

​
object
string
required
Example:

"response"

​
data
object
required