Documentations and guides

Find specifications on how many characte...

Find specifications on how many characters SMS messages can contain as well as what the different HTTP error codes mean.

Do you have a technical documentation of your service?

Yes, we have documentation for all our p...

Yes, we have documentation for all our products here:

GatewayAPI Documentation

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How many characters can a single SMS contain?

Using GSM 03.38, the length of an SMS is...

Using GSM 03.38, the length of an SMS is extended by only using 7 bits per character instead of the normal 8 bits used by UTF-8. This allows for up to 160 characters in a one-page message. If a message is longer than 160 characters, 7 bytes will be used to chain the messages together as pages, giving a total of 153 characters per page.

Using UCS2 encoding will enable a wide range of different characters that are not available in GSM 03.38.
This is achieved by using 2 bytes per character, giving you 70 characters for a one-page messages.
If you go above 70 characters, the messages will be chained together, giving you 134 bytes or 67 characters for your message.

What do the different error codes mean?

We have a list of error codes on our Doc...

We have a list of error codes on our Docs-page.

GatewayAPI Docs - Error codes

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What do the different HTTP error codes mean?

200 OK: API call successfully received, ...

200 OK:
API call successfully received, response contains details on results of the action

400 Bad Request:
Invalid argument, details in the JSON body

401 Unauthorized:
Invalid API key or signature

403 Forbidden:
Unauthorized IP address

404 Not Found:
SMS is not found, or is not yet transferred to datastore

422 Unprocessable Entity:
Invalid JSON request body

500 Internal Server Error:
The request can’t be processed due to an exception, exception details are returned in the JSON body

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