Toll-Free Numbers Verification API

Overview

A toll-free number can be used to send messages in US & Canada once it passes an additional verification process. Users who don’t verify their toll-free numbers will be blocked from sending messages as of November 8, 2023.

A verified toll-free number ensures that the business owning the number is identified, and that the message's content has been reviewed and does not oppose the Disallowed Content Policy. This process ensures better deliverability and less filtration.

To set up a new channel to send SMS messages using a toll-free number the following steps are required.

API Access

The following API requests can only be made using a valid access key, and attached to an access role, with an access policy that at least specifies the permissions to the resources outlined in each section below. Learn more about API access.

Find an available number

If you do not already have a US or Canadian toll-free number available in your workspace you can find one to purchase.

use the search parameter types=toll-free to only search for Toll Free Numbers

List all available numbers in stock at organization level.

get

Authorizations

Path parameters

organizationIdstring · uuidrequired

The ID for the organization.

Example: d0b85ccc-b63a-4e81-b698-c359d77d250e

Query parameters

limitinteger · min: 1 · max: 99 · default: 10optional

Limits the number of results to return per page. The default value is 10 and maximum is 99. If the nextPageToken is defined on response, you can use it to get remaining numbers. To know more, refer to the pagination section.

pageTokenstring · max: 8000optional

Pagination token that keeps of track of the current position in the list. Use it to query remaining results. If not provided, the first page is returned. To learn more about the pagination, please refer to the pagination section on API Access Common API Usage section.

countryCodesstring · iso3166-1[]optional

A 2-digit ISO 3166-1 country code array.

Example: ["US","NL"]

typesstring · enum[]optional

The number type depending on its purpose. Local for regional use, national for countrywide use, mobile for mobile networks, or toll-free for caller-free charging.

Example: ["toll-free"]

featuresstring · enum[] · min: 1optional

The number capabilities, which can be voice, SMS, and MMS for inbound, outbound, or two-way communication, plus WhatsApp.

Example: ["sms-outbound"]

prefixstring · min: 1 · max: 250optional

Used to filter numbers belonging to a specific local area-code. It MUST be used in conjunction with the countryCodes filter. Always provide prefixes in full international format.

Example: +1212

testingbooleanoptional

Responses

application/json

cURL

JavaScript

Python

HTTP

curl -L \
  --url '/organizations/{organizationId}/numbers-stock-items' \
  --header 'Authorization: Bearer jwt'

200

422

{
  "results": [
    {
      "id": "123e4567-e89b-12d3-a456-426614174000",
      "countryCode": "US",
      "type": "local",
      "numberString": "+19283764510",
      "capabilities": {
        "voice": {
          "inbound": true,
          "outbound": true
        },
        "sms": {
          "inbound": true,
          "outbound": true
        },
        "mms": {
          "inbound": true,
          "outbound": true
        }
      },
      "monthlyPrice": {
        "currencyCode": "EUR",
        "amount": 3500000,
        "exponent": -6
      },
      "backOrderRequired": true,
      "backOrderStockId": "text"
    }
  ],
  "nextPageToken": "text"
}

Purchase a number

Once you have found an available number you can purchase this by providing the numberStockItemIds matching the id your previous call returned

A successful request to this endpoint will start a recurring monthly subscription based on the monthly cost of the number.

Buy Long Code Numbers

post

Assigns Long Code Numbers to the current workspace, charging the wallet for their subscription price. When creating LCNs as a User, all specified Number Stock Items should be reserved.

Authorizations

Path parameters

workspaceIdstring · uuidrequired

The ID for the workspace.

Example: d386a801-ee8d-4aba-a7e4-78671bd3b11e

Body

numberStockItemIdsstring · uuid[] · max: 25required

The unique identifiers of the numbers you want to buy. You can buy up to 25 numbers at a time. This operation will incur wallet charges for the numbers. Before buying the number, you must reserve it.

Responses

application/json

cURL

JavaScript

Python

HTTP

curl -L \
  --request POST \
  --url '/workspaces/{workspaceId}/numbers-long-code' \
  --header 'Authorization: Bearer jwt' \
  --header 'Content-Type: application/json' \
  --data '{
    "numberStockItemIds": [
      "123e4567-e89b-12d3-a456-426614174000"
    ]
  }'

201

422

{
  "results": [
    {
      "id": "41e3cf43-4386-464a-a1ee-e6ef6fd6883d",
      "endpointId": "41e3cf43-4386-464a-a1ee-e6ef6fd6883d",
      "numberString": "+14155552671",
      "countryCode": "US",
      "type": "local",
      "capabilities": {
        "voice": {
          "inbound": true,
          "outbound": true
        },
        "sms": {
          "inbound": true,
          "outbound": true
        },
        "mms": {
          "inbound": true,
          "outbound": true
        }
      },
      "createdAt": "2025-03-28T19:29:38.475Z",
      "updatedAt": "2025-03-28T19:29:38.475Z",
      "order": {
        "countryCode": "US",
        "type": "local",
        "capabilities": [
          "voice"
        ],
        "prefix": "text",
        "status": "draft",
        "createdAt": "2025-03-28T19:29:38.475Z",
        "updatedAt": "2025-03-28T19:29:38.475Z"
      },
      "deprovisionAt": "2025-03-28T19:29:38.475Z",
      "endpoint": {
        "id": "123e4567-e89b-12d3-a456-426614174000",
        "type": "long-code-number",
        "instanceId": "1551f382-6870-4480-8f9b-f5ab34936288",
        "name": "+14155552671",
        "capabilities": [
          {
            "name": "sms",
            "inbound": {
              "status": "active",
              "issues": [
                "subscription-is-not-active"
              ]
            },
            "outbound": {
              "status": "active",
              "destinationStatuses": {
                "active": 1,
                "inactive": 1,
                "available": 1,
                "unavailable": 1
              },
              "supportsDestinations": true,
              "issues": [
                "subscription-is-not-active"
              ]
            }
          }
        ],
        "dependencies": [
          {
            "type": "connector",
            "connectorId": "123e4567-e89b-12d3-a456-426614174000",
            "connectorTemplateRef": "text",
            "capabilities": [
              "voice"
            ]
          }
        ],
        "issues": [
          "subscription-is-not-active"
        ],
        "provisioningStatus": "provisioned",
        "createdAt": "2025-03-28T19:29:38.475Z",
        "updatedAt": "2025-03-28T19:29:38.475Z"
      }
    }
  ]
}

Created

Submit a verification application for a toll-free number(s)

To reduce the likelihood of rejection, ensure you are familiar with TFN registration examples and best practices. Specifically

Check this article for tips on how to write an effective useCaseSummary
Check this article on how to write an effective optInWorkflowDescription

Most TFN rejections are caused by unclear or incomplete useCaseSummary and/or optInWorkflowDescription

A-Sync : this will start a background process that may require some time to complete. A Get call may be required to to retrieve the final result .

Before you can use a toll-free number to send SMS messages, you must submit a toll-free number verification request and wait for it to be approved.

You can submit one toll-free number per verification request.

You are not allowed to submit the same number twice, unless the previous submission was resolved with status Rejected or Verified.

Create TfnVerification

post

Authorizations

Path parameters

workspaceIdstring · uuidrequired

The ID for the workspace.

Example: d386a801-ee8d-4aba-a7e4-78671bd3b11e

Query parameters

validatebooleanoptional

When set, only validates the request payload without mutating any data.

Body

all ofoptional

Responses

application/json

cURL

JavaScript

Python

HTTP

curl -L \
  --request POST \
  --url '/workspaces/{workspaceId}/tfn-verifications' \
  --header 'Authorization: Bearer jwt' \
  --header 'Content-Type: application/json' \
  --data '{
    "phoneNumbers": [
      "123e4567-e89b-12d3-a456-426614174000"
    ],
    "businessName": "text",
    "businessAddr1": "text",
    "businessAddr2": "text",
    "businessZip": "text",
    "businessCity": "text",
    "businessState": "text",
    "businessCountry": "text",
    "businessContactFirstName": "text",
    "businessContactLastName": "text",
    "businessContactEmail": "text",
    "businessContactPhone": "text",
    "corporateWebsite": "text",
    "messageVolume": "10",
    "useCase": "text",
    "useCaseSummary": "text",
    "productionMessageContent": "text",
    "optInWorkflowDescription": "text",
    "optInWorkflowImageUrLs": [
      "text"
    ],
    "additionalInformation": "text",
    "isvReseller": "text",
    "testMode": true,
    "brandKycFormEntryId": "123e4567-e89b-12d3-a456-426614174000"
  }'

200

201

400

422

{
  "brandKycFromId": "123e4567-e89b-12d3-a456-426614174000",
  "fields": {
    "phoneNumbers": [
      "text"
    ],
    "businessName": "text",
    "businessAddr1": "text",
    "businessAddr2": "text",
    "businessZip": "text",
    "businessCity": "text",
    "businessState": "text",
    "businessCountry": "text",
    "businessContactFirstName": "text",
    "businessContactLastName": "text",
    "businessContactEmail": "text",
    "businessContactPhone": "text",
    "corporateWebsite": "text",
    "messageVolume": "10",
    "useCase": "text",
    "useCaseSummary": "text",
    "productionMessageContent": "text",
    "optInWorkflowDescription": "text",
    "optInWorkflowImageUrLs": [
      "text"
    ],
    "additionalInformation": "text",
    "isvReseller": "text"
  },
  "error": {
    "code": "text",
    "message": "service.",
    "details": {
      "ANY_ADDITIONAL_PROPERTY": "anything"
    }
  }
}

Validation Response

{
  "businessName": "string", 
  "businessAddr1": "string",
  "businessAddr2": "string",
  "businessZip": "string",
  "businessCity": "string",
  "businessState": "string",
  "businessCountry": "string",
  "businessContactFirstName": "string",
  "businessContactLastName": "string",
  "businessContactEmail": "string",
  "businessContactPhone": "string",
  "corporateWebsite": "string",
  "messageVolume": "10",
  "useCase": "string",
  "useCaseSummary": "string",
  "productionMessageContent": "string",
  "optInWorkflowDescription": "string",
  "optInWorkflowImageURLs": [
    "string"
  ],
  "additionalInformation": "string",
  "isvReseller": "string",
  "organizationId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "workspaceId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "phoneNumbers": [
    "3fa85f64-5717-4562-b3fc-2c963f66afa6" 
  ],
  "testMode": true 
}

To make this call, you must provide following parameters:

Parameter

Description

businessName

The name of the Business using Toll Free Number.

businessAddr1

The address of the Business using Toll Free Number.

businessAddr2 (optional field)

The address of the Business using Toll Free Number.

businessCity

The city of the Business using Toll Free Number.

businessState

The state of the Business using Toll Free Number.

businessZip

The zip/postal code of the Business using Toll Free Number.

businessCountry

Country of the Business using Toll Free Number.

corporateWebsite

The website of the Business using Toll Free Number.

businessContactFirstName

Business contact first name.

businessContactLastName

Business contact last name.

businessContactEmail

Business contact email address.

businessContactPhone

Business contact phone number.

messageVolume

Estimate monthly volume of messages from the Toll Free Number. See more details below.

phoneNumbers

IDs of Toll-Free numbers.

useCase

The Category of the use case. See below types of UseCases

useCaseSummary

Please provide a general idea of the use case and customer.

productionMessageContent

Example of message content.

optInWorkflowDescription

Description of the opt in workflow.

optInWorkflowImageURLs

Images showing the opt in workflow.

additionalInformation (optional field)

Any additional information.

isvReseller (optional field)

ISV Name.

UseCase categories must only be of these types

[
    "2FA",
    "App Notifications",
    "Appointments",
    "Auctions",
    "Auto Repair Services",
    "Bank Transfers",
    "Billing",
    "Booking Confirmations",
    "Business Updates",
    "Career Training",
    "Chatbot",
    "Contests",
    "Courier Services & Deliveries",
    "Emergency Alerts",
    "Events & Planning",
    "Financial Services",
    "Fraud Alerts",
    "Fundraising",
    "General Marketing",
    "General School Updates",
    "HR / Staffing",
    "Healthcare Services",
    "Housing Community Updates",
    "Insurance Services",
    "Job Dispatch",
    "Mixed",
    "Motivational Reminders",
    "Notary Notifications",
    "Order Notifications",
    "Public Works",
    "Real Estate Services",
    "Religious Services",
    "Repair and Diagnostics Alerts",
    "Rewards Program",
    "Surveys",
    "System Alerts",
    "Voting Reminders",
    "Webinar Reminders",
    "Workshop Alerts",
    "Zipwhip Testing"
]

Message Volume can only be of this type:

10; 100; 1,000; 10,000; 100,000; 250,000; 500,000; 750,000; 1,000,000; 5,000,000; 10,000,000+

Fields below are not required for the submission:

businessAddr2, additionalInformation, isvReseller

Responses

201: Created

{
  "businessName": "string",
  "businessAddr1": "string",
  "businessAddr2": "string",
  "businessZip": "string",
  "businessCity": "string",
  "businessState": "string",
  "businessCountry": "string",
  "businessContactFirstName": "string",
  "businessContactLastName": "string",
  "businessContactEmail": "string",
  "businessContactPhone": "string",
  "corporateWebsite": "string",
  "messageVolume": "10",
  "useCase": "string",
  "useCaseSummary": "string",
  "productionMessageContent": "string",
  "optInWorkflowDescription": "string",
  "optInWorkflowImageURLs": [
    "string"
  ],
  "additionalInformation": "string",
  "isvReseller": "string",
  "organizationId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "workspaceId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "phoneNumbers": [
    "3fa85f64-5717-4562-b3fc-2c963f66afa6"
  ],
  "testMode": true
}

422: Unprocessable Entity (Invalid verification submission)

{
  "code": "string",
  "message": "string",
  "details": {
    "additionalProp1": [
      "string"
    ],
    "additionalProp2": [
      "string"
    ],
    "additionalProp3": [
      "string"
    ]
  }
}

400: Bad request

{
    "code": "string",
    "message": "string"
}

Fetch status of a toll-free number verification

Once you submit your verification request, you have to wait for the submission to be reviewed. You will be informed about the status of your submission in the portal, but you can also use the API to fetch your verification request status.

Statuses

Submitted

Verification is submitted and waiting to be reviewed

InProgress

Verification is being reviewed by authority. Additional information may be requested. In case of API integration please inspect the `statusMessage` object for more information.

Verified

Verification submission has been approved, and the number is ready to be used.

Rejected

Verification submission has been rejected.

Get Workspace TfnVerification

get

Authorizations

Path parameters

workspaceIdstring · uuidrequired

The ID for the workspace.

Example: d386a801-ee8d-4aba-a7e4-78671bd3b11e

verificationIdstringrequired

Responses

application/json

cURL

JavaScript

Python

HTTP

curl -L \
  --url '/workspaces/{workspaceId}/tfn-verifications/{verificationId}' \
  --header 'Authorization: Bearer jwt'

200

404

{
  "id": "123e4567-e89b-12d3-a456-426614174000",
  "organizationId": "123e4567-e89b-12d3-a456-426614174000",
  "workspaceId": "123e4567-e89b-12d3-a456-426614174000",
  "verificationRequestId": "text",
  "longCodeNumberIds": [
    "123e4567-e89b-12d3-a456-426614174000"
  ],
  "verificationRequestData": {
    "phoneNumbers": [
      "text"
    ],
    "businessName": "text",
    "businessAddr1": "text",
    "businessAddr2": "text",
    "businessZip": "text",
    "businessCity": "text",
    "businessState": "text",
    "businessCountry": "text",
    "businessContactFirstName": "text",
    "businessContactLastName": "text",
    "businessContactEmail": "text",
    "businessContactPhone": "text",
    "corporateWebsite": "text",
    "messageVolume": "10",
    "useCase": "text",
    "useCaseSummary": "text",
    "productionMessageContent": "text",
    "optInWorkflowDescription": "text",
    "optInWorkflowImageUrLs": [
      "text"
    ],
    "additionalInformation": "text",
    "isvReseller": "text"
  },
  "status": "submitted",
  "statusMessage": {
    "statusCode": "text",
    "declineReasonDescription": "text",
    "resubmitAllowed": true
  },
  "testMode": true,
  "createdAt": "2025-03-28T19:29:38.475Z",
  "updatedAt": "2025-03-28T19:29:38.475Z"
}

Responses

200 OK:

{
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "organizationId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "workspaceId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "verificationRequestId": "string",
  "phoneNumbers": [
    "3fa85f64-5717-4562-b3fc-2c963f66afa6"
  ],
  "verificationRequestData": {
    "businessName": "string",
    "businessAddr1": "string",
    "businessAddr2": "string",
    "businessZip": "string",
    "businessCity": "string",
    "businessState": "string",
    "businessCountry": "string",
    "businessContactFirstName": "string",
    "businessContactLastName": "string",
    "businessContactEmail": "string",
    "businessContactPhone": "string",
    "corporateWebsite": "string",
    "messageVolume": "10",
    "useCase": "string",
    "useCaseSummary": "string",
    "productionMessageContent": "string",
    "optInWorkflowDescription": "string",
    "optInWorkflowImageURLs": [
      "string"
    ],
    "additionalInformation": "string",
    "isvReseller": "string"
  },
  "status": "submitted",
  "statusMessage": {
    "StatusCode": "string",
    "DeclineReasonDescription": "string",
    "ResubmitAllowed": "string",
    "Message": "string"
  },
  "testMode": true,
  "createdAt": "2023-10-12T13:13:15.161Z",
  "updatedAt": "2023-10-12T13:13:15.161Z"
}

404 Not Found:

{
  "code": "string",
  "message": "string"
}

Update toll-free number verification submission

You can update verification submission with new information in two cases:

Authority has requested to add additional information. Your input is required.

Provide more accurate verification information without request of an authority.

Update Workspace TfnVerification submission, and submit updates to 3rd party TfnVerification API

put

Authorizations

Path parameters

workspaceIdstring · uuidrequired

The ID for the workspace.

Example: d386a801-ee8d-4aba-a7e4-78671bd3b11e

verificationIdstringrequired

Body

all ofoptional

Responses

application/json

cURL

JavaScript

Python

HTTP

curl -L \
  --request PUT \
  --url '/workspaces/{workspaceId}/tfn-verifications/{verificationId}' \
  --header 'Authorization: Bearer jwt' \
  --header 'Content-Type: application/json' \
  --data '{
    "phoneNumbers": [
      "text"
    ],
    "businessName": "text",
    "businessAddr1": "text",
    "businessAddr2": "text",
    "businessZip": "text",
    "businessCity": "text",
    "businessState": "text",
    "businessCountry": "text",
    "businessContactFirstName": "text",
    "businessContactLastName": "text",
    "businessContactEmail": "text",
    "businessContactPhone": "text",
    "corporateWebsite": "text",
    "messageVolume": "10",
    "useCase": "text",
    "useCaseSummary": "text",
    "productionMessageContent": "text",
    "optInWorkflowDescription": "text",
    "optInWorkflowImageUrLs": [
      "text"
    ],
    "additionalInformation": "text",
    "isvReseller": "text"
  }'

200

400

404

422

{
  "id": "123e4567-e89b-12d3-a456-426614174000",
  "organizationId": "123e4567-e89b-12d3-a456-426614174000",
  "workspaceId": "123e4567-e89b-12d3-a456-426614174000",
  "verificationRequestId": "text",
  "longCodeNumberIds": [
    "123e4567-e89b-12d3-a456-426614174000"
  ],
  "verificationRequestData": {
    "phoneNumbers": [
      "text"
    ],
    "businessName": "text",
    "businessAddr1": "text",
    "businessAddr2": "text",
    "businessZip": "text",
    "businessCity": "text",
    "businessState": "text",
    "businessCountry": "text",
    "businessContactFirstName": "text",
    "businessContactLastName": "text",
    "businessContactEmail": "text",
    "businessContactPhone": "text",
    "corporateWebsite": "text",
    "messageVolume": "10",
    "useCase": "text",
    "useCaseSummary": "text",
    "productionMessageContent": "text",
    "optInWorkflowDescription": "text",
    "optInWorkflowImageUrLs": [
      "text"
    ],
    "additionalInformation": "text",
    "isvReseller": "text"
  },
  "status": "submitted",
  "statusMessage": {
    "statusCode": "text",
    "declineReasonDescription": "text",
    "resubmitAllowed": true
  },
  "testMode": true,
  "createdAt": "2025-03-28T19:29:38.475Z",
  "updatedAt": "2025-03-28T19:29:38.475Z"
}

{
  "businessName": "string",
  "businessAddr1": "string",
  "businessAddr2": "string",
  "businessZip": "string",
  "businessCity": "string",
  "businessState": "string",
  "businessCountry": "string",
  "businessContactFirstName": "string",
  "businessContactLastName": "string",
  "businessContactEmail": "string",
  "businessContactPhone": "string",
  "corporateWebsite": "string",
  "messageVolume": "10",
  "useCase": "string",
  "useCaseSummary": "string",
  "productionMessageContent": "string",
  "optInWorkflowDescription": "string",
  "optInWorkflowImageURLs": [
    "string"
  ],
  "additionalInformation": "string",
  "isvReseller": "string",
  "organizationId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "testMode": true
}

Responses

200 OK:

{
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "organizationId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "workspaceId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "verificationRequestId": "string",
  "phoneNumbers": [
    "3fa85f64-5717-4562-b3fc-2c963f66afa6"
  ],
  "verificationRequestData": {
    "businessName": "string",
    "businessAddr1": "string",
    "businessAddr2": "string",
    "businessZip": "string",
    "businessCity": "string",
    "businessState": "string",
    "businessCountry": "string",
    "businessContactFirstName": "string",
    "businessContactLastName": "string",
    "businessContactEmail": "string",
    "businessContactPhone": "string",
    "corporateWebsite": "string",
    "messageVolume": "10",
    "useCase": "string",
    "useCaseSummary": "string",
    "productionMessageContent": "string",
    "optInWorkflowDescription": "string",
    "optInWorkflowImageURLs": [
      "string"
    ],
    "additionalInformation": "string",
    "isvReseller": "string"
  },
  "status": "submitted",
  "statusMessage": {
    "StatusCode": "string",
    "DeclineReasonDescription": "string",
    "ResubmitAllowed": "string",
    "Message": "string"
  },
  "testMode": true,
  "createdAt": "2023-10-12T13:44:03.004Z",
  "updatedAt": "2023-10-12T13:44:03.004Z"
}
```

#### 400: Bad request 
Error processing the request
```json
{
    "code": "string",
    "message": "string"
}

404 Not Found:

{
  "code": "string",
  "message": "string"
}

422: Unprocessable Entity

{
  "code": "string",
  "message": "string",
  "details": {
    "additionalProp1": [
      "string"
    ],
    "additionalProp2": [
      "string"
    ],
    "additionalProp3": [
      "string"
    ]
  }
}

Last updated 5 months ago

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Overview

API Access

Find an available number

List all available numbers in stock at organization level.

Show child attributes

Show child attributes

Purchase a number

Buy Long Code Numbers

Submit a verification application for a toll-free number(s)

Create TfnVerification

Show child attributes

Show child attributes

UseCase categories must only be of these types

Responses

Fetch status of a toll-free number verification

Statuses

Get Workspace TfnVerification

Responses

Update toll-free number verification submission

Update Workspace TfnVerification submission, and submit updates to 3rd party TfnVerification API

Show child attributes

Responses