With the Nexmo SMS API you can send SMS from your account and lookup messages both messages that you've sent as well as messages sent to your virtual numbers. Numbers are specified in E.164 format. More SMS API documentation is at https://developer.nexmo.com/messaging/sms/overview
Send an outbound SMS from your Nexmo account
POST
https://rest.nexmo.com/sms/:format
Host
https://rest.nexmo.com
POST
/sms/:format
The format of the response
Must be one of:json or xml
Your API key
Your API secret. Required unless sig is provided
The hash of the request parameters in alphabetical order, a timestamp and the signature secret. See Signing Requests for more details.
The name or number the message should be sent from. Alphanumeric senderID's are not supported in all countries, see Global Messaging for more details. If alphanumeric, spaces will be ignored. Numbers are specified in E.164 format.
The number that the message should be sent to. Numbers are specified in E.164 format.
The body of the message being sent. If your message contains characters that can be encoded according to the GSM Standard and Extended tables then you can set the type to text. If your message contains characters outside this range, then you will need to set the type to unicode.
Advanced: The duration in milliseconds the delivery of an SMS will be attempted.
By default Nexmo attempt delivery for 72 hours, however the maximum effective value depends on the operator and is typically 24 - 48 hours. We recommend this value should be kept at its default or at least 30 minutes.
Advanced: Boolean indicating if you like to receive a Delivery Receipt.
Advanced: The webhook endpoint the delivery receipt for this sms is sent to. This parameter overrides the webhook endpoint you set in Dashboard.
Advanced: The Data Coding Scheme value of the message
Must be one of:0, 1, 2 or 3
Advanced: The format of the message body
Must be one of:text, binary, wappush, unicode, vcal or vcard
Advanced: A business card in vCard format. Depends on type parameter having the value vcard.
Advanced: A calendar event in vCal format. Depends on type parameter having the value vcal.
Advanced: Hex encoded binary data. Depends on type parameter having the value binary.
Advanced: Your custom Hex encoded User Data Header. Depends on type parameter having the value binary.
Advanced: The value of the protocol identifier to use. Ensure that the value is aligned with udh.
Advanced: The title for a wappush SMS. Depends on type parameter having the value wappush.
Advanced: The URL of your website. Depends on type parameter having the value wappush.
Advanced: The availability for an SMS in milliseconds. Depends on type parameter having the value wappush.
Advanced: You can optionally include your own reference of up to 40 characters.
Advanced: An optional string used to identify separate accounts using the SMS endpoint for billing purposes. To use this feature, please email support@nexmo.com
The amount of messages in the request
The number the message was sent to. Numbers are specified in E.164 format.
The ID of the message
Your remaining balance
The cost of the message
The ID of the network of the recipient
If a client-ref was included when sending the SMS, this field will be included and hold the value that was sent.
Advanced: An optional string used to identify separate accounts using the SMS endpoint for billing purposes. To use this feature, please email support@nexmo.com
The amount of messages in the request
The error status of the message
The description of the error
The error status of the message
The description of the error
POST /sms/:format HTTP/1.1
Host: rest.nexmo.com
Content-Type: application/x-www-form-urlencoded
Content-Length: 45
api_key=abcd1234&from=AcmeInc&to=447700900000POST /sms/:format HTTP/1.1
Host: rest.nexmo.com
Content-Type: application/x-www-form-urlencoded
Content-Length: 334
api_key=abcd1234&api_secret=abcdef0123456789&from=AcmeInc&to=447700900000&text=Hello+World%21&ttl=900000&callback=https%3A%2F%2Fexample.com%2Fsms-dlr&type=text&body=0011223344556677&udh=06050415811581&protocol-id=127&title=Welcome&url=https%3A%2F%2Fexample.com&validity=300000&client-ref=my-personal-reference&account-ref=customer1234{
"message-count": "1",
"messages": [
{
"to": "447700900000",
"message-id": "0A0000000123ABCD1",
"status": "0",
"remaining-balance": "3.14159265",
"message-price": "0.03330000",
"network": "12345",
"client-ref": "my-personal-reference",
"account-ref": "customer1234"
}
]
}{
"message-count": "1",
"messages": [
{
"status": "2",
"error-text": "Missing to param"
}
]
}<?xml version="1.0" encoding="UTF-8"?>
<mt-submission-response>
<messages count="1">
<message>
<to>447700900000</to>
<messageId>0A0000000123ABCD1</messageId>
<status>0</status>
<remainingBalance>3.14159265</remainingBalance>
<messagePrice>0.03330000</messagePrice>
<network>12345</network>
<client-ref>my-personal-reference</client-ref>
<account-ref>customer1234</account-ref>
</message>
</messages>
</mt-submission-response>
<?xml version="1.0" encoding="UTF-8"?>
<mt-submission-response>
<messages>
<message>
<status>2</status>
<error-text>Missing to param</error-text>
</message>
</messages>
</mt-submission-response>
The following are parameters sent in as a delivery receipt callback. You can subscribe to webhooks to receive notification when the delivery status of an SMS that you have sent with Nexmo changes.
POST
https://example.com/webhooks/event
The number the message was sent to. Numbers are specified in E.164 format.
The SenderID you set in from in your request.
The Mobile Country Code Mobile Network Code (MCCMNC) of the carrier this phone number is registered with.
The Nexmo ID for this message.
The cost of the message
A code that explains where the message is in the delivery process.
When the DLR was received from the carrier in the following format YYMMDDHHMM. For example, 2001011400 is at 2020-01-01 14:00
The status of the request. Will be a non 0 value if there has been an error, or if the status is unknown. See the Delivery Receipt documentation for more details
The API key that sent the SMS. This is useful when multiple accounts are sending webhooks to the same endpoint.
If the client-ref is set when the SMS is sent, it will be included in the delivery receipt
The time when Nexmo started to push this Delivery Receipt to your webhook endpoint.
A timestamp in Unix (seconds since the epoch) format. Only included if you have signatures enabled
A random string to be used when calculating the signature. Only included if you have signatures enabled
The signature to enable verification of the source of this webhook. Please see the developer documentation for validating signatures for more information, or use one of our published SDKs. Only included if you have signatures enabled
{
"msisdn": "447700900000",
"to": "AcmeInc",
"network-code": "12345",
"messageId": "0A0000001234567B",
"price": "0.03330000",
"status": "delivered",
"scts": "2001011400",
"err-code": "0",
"api-key": "abcd1234",
"client-ref": "my-personal-reference",
"message-timestamp": "2020-01-01 12:00:00 +0000",
"timestamp": "1582650446",
"nonce": "ec11dd3e-1e7f-4db5-9467-82b02cd223b9",
"sig": "1A20E4E2069B609FDA6CECA9DE18D5CAFE99720DDB628BD6BE8B19942A336E1C"
}Webhooks are an extension of an API, but instead of your code requesting data, the API sends data to you. The data arrives in a web request to your application.
To learn more about webhooks, see our webhooks documentation
This API may send any of the webhooks documented below to the URL that you have configured. You must respond with a 200 or 204 HTTP response, or the requests will be retried
If you rent one or more virtual numbers from Nexmo, inbound messages to that number are sent to your webhook endpoint.
When you receive an inbound message, you must send a 2xx response. If you do not send a 2xx response Nexmo will resend the inbound message for the next 24 hours.
POST
https://example.com/webhooks/inbound-sms
The Nexmo API Key of the receiving account.
The phone number that this inbound message was sent from. Numbers are specified in E.164 format.
The phone number the message was sent to. This is your virtual number. Numbers are specified in E.164 format.
The ID of the message
The message body for this inbound message.
Possible values are:
text - standard text.unicode - URLencoded unicode . This is valid for standard GSM, Arabic, Chinese, double-encoded characters and so on.binary - a binary message.The first word in the message body. Converted to upper case.
The time when Nexmo started to push this Delivery Receipt to your webhook endpoint.
A unix timestamp representation of message-timestamp.
A random string that forms part of the signed set of parameters, it adds an extra element of unpredictability into the signature for the request. You use the nonce and timestamp parameters with your shared secret to calculate and validate the signature for inbound messages.
True - if this is a concatenated message. This field does not exist if it is a single message
The transaction reference. All parts of this message share this value.
The number of parts in this concatenated message.
The number of this part in the message. Counting starts at 1.
The content of this message, if type is binary.
The hex encoded User Data Header, if type is binary
{
"api-key": "abcd1234",
"msisdn": "447700900001",
"to": "447700900000",
"messageId": "0A0000000123ABCD1",
"text": "Hello world",
"type": "text",
"keyword": "HELLO",
"message-timestamp": "2020-01-01 12:00:00 +0000"
}{
"api-key": "abcd1234",
"msisdn": "447700900001",
"to": "447700900000",
"messageId": "0A0000000123ABCD1",
"text": "Hello world",
"type": "text",
"keyword": "HELLO",
"message-timestamp": "2020-01-01 12:00:00 +0000",
"timestamp": "1578787200",
"nonce": "aaaaaaaa-bbbb-cccc-dddd-0123456789ab",
"concat": "true",
"concat-ref": "1",
"concat-total": "3",
"concat-part": "2"
}The following is a non-exhaustive list of error codes that may occur while using this API. These codes are in addition to any of our generic error codes.
| Code | Details |
|---|---|
| 1 | Throttled. You are sending SMS faster than the account limit. |
| 2 | Missing Parameters. Your request is missing one of the required parameters |
| 3 | Invalid Parameters. The value of one or more parameters is invalid. |
| 4 | Invalid Credentials. Your API key and/or secret are incorrect, invalid or disabled. |
| 5 | Internal Error. An error has occurred in the platform whilst processing this message. |
| 6 | Invalid Message. The platform was unable to process this message, for example, an un-recognized number prefix. |
| 7 | Number Barred. The number you are trying to send messages to is blacklisted and may not receive them. |
| 8 | Partner Account Barred. Your Nexmo account has been suspended. |
| 9 | Partner Quota Violation. You do not have sufficient credit to send the message. |
| 10 | Too Many Existing Binds. The number of simultaneous connections to the platform exceeds your account allocation. |
| 11 | Account Not Enabled For HTTP. This account is not provisioned for the SMS API. |
| 12 | Message Too Long. The message length exceeds the maximum allowed. |
| 14 | Invalid Signature. The signature supplied could not be verified. |
| 15 | Invalid Sender Address. You are using a non-authorized sender ID in the |
| 22 | Invalid Network Code. The network code supplied was either not recognized, or does not match the country of the destination address. |
| 23 | Invalid Callback Url. The callback URL supplied was either too long or contained illegal characters. |
| 29 | Non-Whitelisted Destination. Your Nexmo account is still in demo mode. While in demo mode you must add target numbers to your whitelisted destination list. |
| 32 | Signature And API Secret Disallowed. A signed request may not also present an |
| 33 | Number De-activated. The number you are trying to send messages to is de-activated and may not receive them. |