telnyx-messaging-hosted-java
Telnyx Messaging Hosted - Java
Installation
<!-- Maven -->
<dependency>
<groupId>com.telnyx.sdk</groupId>
<artifactId>telnyx-java</artifactId>
<version>6.26.0</version>
</dependency>
// Gradle
implementation("com.telnyx.sdk:telnyx-java:6.26.0")
Setup
import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;
TelnyxClient client = TelnyxOkHttpClient.fromEnv();
All examples below assume client is already initialized as shown above.
Error Handling
All API calls can fail with network errors, rate limits (429), validation errors (422), or authentication errors (401). Always handle errors in production code:
import com.telnyx.sdk.errors.TelnyxServiceException;
try {
var result = client.messages().send(params);
} catch (TelnyxServiceException e) {
System.err.println("API error " + e.statusCode() + ": " + e.getMessage());
if (e.statusCode() == 422) {
System.err.println("Validation error — check required fields and formats");
} else if (e.statusCode() == 429) {
// Rate limited — wait and retry with exponential backoff
Thread.sleep(1000);
}
}
Common error codes: 401 invalid API key, 403 insufficient permissions,
404 resource not found, 422 validation error (check field formats),
429 rate limited (retry with exponential backoff).
Important Notes
- Phone numbers must be in E.164 format (e.g.,
+13125550001). Include the+prefix and country code. No spaces, dashes, or parentheses. - Pagination: List methods return a page. Use
.autoPager()for automatic iteration:for (var item : page.autoPager()) { ... }. For manual control, use.hasNextPage()and.nextPage().
Send an RCS message
POST /messages/rcs — Required: agent_id, to, messaging_profile_id, agent_message
Optional: mms_fallback (object), sms_fallback (object), type (enum: RCS), webhook_url (url)
import com.telnyx.sdk.models.messages.RcsAgentMessage;
import com.telnyx.sdk.models.messages.rcs.RcSendParams;
import com.telnyx.sdk.models.messages.rcs.RcSendResponse;
RcSendParams params = RcSendParams.builder()
.agentId("Agent007")
.agentMessage(RcsAgentMessage.builder().build())
.messagingProfileId("messaging_profile_id")
.to("+13125551234")
.build();
RcSendResponse response = client.messages().rcs().send(params);
Returns: body (object), direction (string), encoding (string), from (object), id (string), messaging_profile_id (string), organization_id (string), received_at (date-time), record_type (string), to (array[object]), type (string), wait_seconds (float)
Generate RCS deeplink
Generate a deeplink URL that can be used to start an RCS conversation with a specific agent.
GET /messages/rcs/deeplinks/{agent_id}
import com.telnyx.sdk.models.messages.rcs.RcGenerateDeeplinkParams;
import com.telnyx.sdk.models.messages.rcs.RcGenerateDeeplinkResponse;
RcGenerateDeeplinkResponse response = client.messages().rcs().generateDeeplink("agent_id");
Returns: url (string)
List all RCS agents
GET /messaging/rcs/agents
import com.telnyx.sdk.models.messaging.rcs.agents.AgentListPage;
import com.telnyx.sdk.models.messaging.rcs.agents.AgentListParams;
AgentListPage page = client.messaging().rcs().agents().list();
Returns: agent_id (string), agent_name (string), created_at (date-time), enabled (boolean), profile_id (uuid), updated_at (date-time), user_id (string), webhook_failover_url (url), webhook_url (url)
Retrieve an RCS agent
GET /messaging/rcs/agents/{id}
import com.telnyx.sdk.models.messaging.rcs.agents.AgentRetrieveParams;
import com.telnyx.sdk.models.rcsagents.RcsAgentResponse;
RcsAgentResponse rcsAgentResponse = client.messaging().rcs().agents().retrieve("id");
Returns: agent_id (string), agent_name (string), created_at (date-time), enabled (boolean), profile_id (uuid), updated_at (date-time), user_id (string), webhook_failover_url (url), webhook_url (url)
Modify an RCS agent
PATCH /messaging/rcs/agents/{id}
Optional: profile_id (uuid), webhook_failover_url (url), webhook_url (url)
import com.telnyx.sdk.models.messaging.rcs.agents.AgentUpdateParams;
import com.telnyx.sdk.models.rcsagents.RcsAgentResponse;
RcsAgentResponse rcsAgentResponse = client.messaging().rcs().agents().update("id");
Returns: agent_id (string), agent_name (string), created_at (date-time), enabled (boolean), profile_id (uuid), updated_at (date-time), user_id (string), webhook_failover_url (url), webhook_url (url)
Check RCS capabilities (batch)
POST /messaging/rcs/bulk_capabilities — Required: agent_id, phone_numbers
import com.telnyx.sdk.models.messaging.rcs.RcListBulkCapabilitiesParams;
import com.telnyx.sdk.models.messaging.rcs.RcListBulkCapabilitiesResponse;
RcListBulkCapabilitiesParams params = RcListBulkCapabilitiesParams.builder()
.agentId("TestAgent")
.addPhoneNumber("+13125551234")
.build();
RcListBulkCapabilitiesResponse response = client.messaging().rcs().listBulkCapabilities(params);
Returns: agent_id (string), agent_name (string), features (array[string]), phone_number (string), record_type (enum: rcs.capabilities)
Check RCS capabilities
GET /messaging/rcs/capabilities/{agent_id}/{phone_number}
import com.telnyx.sdk.models.messaging.rcs.RcRetrieveCapabilitiesParams;
import com.telnyx.sdk.models.messaging.rcs.RcRetrieveCapabilitiesResponse;
RcRetrieveCapabilitiesParams params = RcRetrieveCapabilitiesParams.builder()
.agentId("agent_id")
.phoneNumber("phone_number")
.build();
RcRetrieveCapabilitiesResponse response = client.messaging().rcs().retrieveCapabilities(params);
Returns: agent_id (string), agent_name (string), features (array[string]), phone_number (string), record_type (enum: rcs.capabilities)
Add RCS test number
Adds a test phone number to an RCS agent for testing purposes.
PUT /messaging/rcs/test_number_invite/{id}/{phone_number}
import com.telnyx.sdk.models.messaging.rcs.RcInviteTestNumberParams;
import com.telnyx.sdk.models.messaging.rcs.RcInviteTestNumberResponse;
RcInviteTestNumberParams params = RcInviteTestNumberParams.builder()
.id("id")
.phoneNumber("phone_number")
.build();
RcInviteTestNumberResponse response = client.messaging().rcs().inviteTestNumber(params);
Returns: agent_id (string), phone_number (string), record_type (enum: rcs.test_number_invite), status (string)
List messaging hosted number orders
GET /messaging_hosted_number_orders
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderListPage;
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderListParams;
MessagingHostedNumberOrderListPage page = client.messagingHostedNumberOrders().list();
Returns: id (uuid), messaging_profile_id (string | null), phone_numbers (array[object]), record_type (string), status (enum: carrier_rejected, compliance_review_failed, deleted, failed, incomplete_documentation, incorrect_billing_information, ineligible_carrier, loa_file_invalid, loa_file_successful, pending, provisioning, successful)
Create a messaging hosted number order
POST /messaging_hosted_number_orders
Optional: messaging_profile_id (string), phone_numbers (array[string])
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderCreateParams;
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderCreateResponse;
MessagingHostedNumberOrderCreateResponse messagingHostedNumberOrder = client.messagingHostedNumberOrders().create();
Returns: id (uuid), messaging_profile_id (string | null), phone_numbers (array[object]), record_type (string), status (enum: carrier_rejected, compliance_review_failed, deleted, failed, incomplete_documentation, incorrect_billing_information, ineligible_carrier, loa_file_invalid, loa_file_successful, pending, provisioning, successful)
Check hosted messaging eligibility
POST /messaging_hosted_number_orders/eligibility_numbers_check — Required: phone_numbers
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderCheckEligibilityParams;
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderCheckEligibilityResponse;
MessagingHostedNumberOrderCheckEligibilityParams params = MessagingHostedNumberOrderCheckEligibilityParams.builder()
.addPhoneNumber("string")
.build();
MessagingHostedNumberOrderCheckEligibilityResponse response = client.messagingHostedNumberOrders().checkEligibility(params);
Returns: phone_numbers (array[object])
Retrieve a messaging hosted number order
GET /messaging_hosted_number_orders/{id}
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderRetrieveParams;
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderRetrieveResponse;
MessagingHostedNumberOrderRetrieveResponse messagingHostedNumberOrder = client.messagingHostedNumberOrders().retrieve("id");
Returns: id (uuid), messaging_profile_id (string | null), phone_numbers (array[object]), record_type (string), status (enum: carrier_rejected, compliance_review_failed, deleted, failed, incomplete_documentation, incorrect_billing_information, ineligible_carrier, loa_file_invalid, loa_file_successful, pending, provisioning, successful)
Delete a messaging hosted number order
Delete a messaging hosted number order and all associated phone numbers.
DELETE /messaging_hosted_number_orders/{id}
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderDeleteParams;
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderDeleteResponse;
MessagingHostedNumberOrderDeleteResponse messagingHostedNumberOrder = client.messagingHostedNumberOrders().delete("id");
Returns: id (uuid), messaging_profile_id (string | null), phone_numbers (array[object]), record_type (string), status (enum: carrier_rejected, compliance_review_failed, deleted, failed, incomplete_documentation, incorrect_billing_information, ineligible_carrier, loa_file_invalid, loa_file_successful, pending, provisioning, successful)
Upload hosted number document
POST /messaging_hosted_number_orders/{id}/actions/file_upload
import com.telnyx.sdk.models.messaginghostednumberorders.actions.ActionUploadFileParams;
import com.telnyx.sdk.models.messaginghostednumberorders.actions.ActionUploadFileResponse;
ActionUploadFileResponse response = client.messagingHostedNumberOrders().actions().uploadFile("id");
Returns: id (uuid), messaging_profile_id (string | null), phone_numbers (array[object]), record_type (string), status (enum: carrier_rejected, compliance_review_failed, deleted, failed, incomplete_documentation, incorrect_billing_information, ineligible_carrier, loa_file_invalid, loa_file_successful, pending, provisioning, successful)
Validate hosted number codes
Validate the verification codes sent to the numbers of the hosted order. The verification codes must be created in the verification codes endpoint.
POST /messaging_hosted_number_orders/{id}/validation_codes — Required: verification_codes
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderValidateCodesParams;
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderValidateCodesResponse;
MessagingHostedNumberOrderValidateCodesParams params = MessagingHostedNumberOrderValidateCodesParams.builder()
.id("id")
.addVerificationCode(MessagingHostedNumberOrderValidateCodesParams.VerificationCode.builder()
.code("code")
.phoneNumber("phone_number")
.build())
.build();
MessagingHostedNumberOrderValidateCodesResponse response = client.messagingHostedNumberOrders().validateCodes(params);
Returns: order_id (uuid), phone_numbers (array[object])
Create hosted number verification codes
Create verification codes to validate numbers of the hosted order. The verification codes will be sent to the numbers of the hosted order.
POST /messaging_hosted_number_orders/{id}/verification_codes — Required: phone_numbers, verification_method
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderCreateVerificationCodesParams;
import com.telnyx.sdk.models.messaginghostednumberorders.MessagingHostedNumberOrderCreateVerificationCodesResponse;
MessagingHostedNumberOrderCreateVerificationCodesParams params = MessagingHostedNumberOrderCreateVerificationCodesParams.builder()
.id("id")
.addPhoneNumber("string")
.verificationMethod(MessagingHostedNumberOrderCreateVerificationCodesParams.VerificationMethod.SMS)
.build();
MessagingHostedNumberOrderCreateVerificationCodesResponse response = client.messagingHostedNumberOrders().createVerificationCodes(params);
Returns: error (string), phone_number (string), type (enum: sms, call), verification_code_id (uuid)
Delete a messaging hosted number
DELETE /messaging_hosted_numbers/{id}
import com.telnyx.sdk.models.messaginghostednumbers.MessagingHostedNumberDeleteParams;
import com.telnyx.sdk.models.messaginghostednumbers.MessagingHostedNumberDeleteResponse;
MessagingHostedNumberDeleteResponse messagingHostedNumber = client.messagingHostedNumbers().delete("id");
Returns: id (uuid), messaging_profile_id (string | null), phone_numbers (array[object]), record_type (string), status (enum: carrier_rejected, compliance_review_failed, deleted, failed, incomplete_documentation, incorrect_billing_information, ineligible_carrier, loa_file_invalid, loa_file_successful, pending, provisioning, successful)
List Verification Requests
Get a list of previously-submitted tollfree verification requests
GET /messaging_tollfree/verification/requests
import com.telnyx.sdk.models.messagingtollfree.verification.requests.RequestListPage;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.RequestListParams;
RequestListParams params = RequestListParams.builder()
.page(1L)
.pageSize(1L)
.build();
RequestListPage page = client.messagingTollfree().verification().requests().list(params);
Returns: records (array[object]), total_records (integer)
Submit Verification Request
Submit a new tollfree verification request
POST /messaging_tollfree/verification/requests — Required: businessName, corporateWebsite, businessAddr1, businessCity, businessState, businessZip, businessContactFirstName, businessContactLastName, businessContactEmail, businessContactPhone, messageVolume, phoneNumbers, useCase, useCaseSummary, productionMessageContent, optInWorkflow, optInWorkflowImageURLs, additionalInformation
Optional: ageGatedContent (boolean), businessAddr2 (string), businessRegistrationCountry (string | null), businessRegistrationNumber (string | null), businessRegistrationType (string | null), campaignVerifyAuthorizationToken (string | null), doingBusinessAs (string | null), entityType (object), helpMessageResponse (string | null), isvReseller (string | null), optInConfirmationResponse (string | null), optInKeywords (string | null), privacyPolicyURL (string | null), termsAndConditionURL (string | null), webhookUrl (string)
import com.telnyx.sdk.models.messagingtollfree.verification.requests.RequestCreateParams;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.TfPhoneNumber;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.TfVerificationRequest;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.Url;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.UseCaseCategories;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.VerificationRequestEgress;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.Volume;
TfVerificationRequest params = TfVerificationRequest.builder()
.additionalInformation("additionalInformation")
.businessAddr1("600 Congress Avenue")
.businessCity("Austin")
.businessContactEmail("email@example.com")
.businessContactFirstName("John")
.businessContactLastName("Doe")
.businessContactPhone("+18005550100")
.businessName("Telnyx LLC")
.businessState("Texas")
.businessZip("78701")
.corporateWebsite("http://example.com")
.messageVolume(Volume.V_100000)
.optInWorkflow("User signs into the Telnyx portal, enters a number and is prompted to select whether they want to use 2FA verification for security purposes. If they've opted in a confirmation message is sent out to the handset")
.addOptInWorkflowImageUrl(Url.builder()
.url("https://telnyx.com/sign-up")
.build())
.addOptInWorkflowImageUrl(Url.builder()
.url("https://telnyx.com/company/data-privacy")
.build())
.addPhoneNumber(TfPhoneNumber.builder()
.phoneNumber("+18773554398")
.build())
.addPhoneNumber(TfPhoneNumber.builder()
.phoneNumber("+18773554399")
.build())
.productionMessageContent("Your Telnyx OTP is XXXX")
.useCase(UseCaseCategories.TWO_FA)
.useCaseSummary("This is a use case where Telnyx sends out 2FA codes to portal users to verify their identity in order to sign into the portal")
.build();
VerificationRequestEgress verificationRequestEgress = client.messagingTollfree().verification().requests().create(params);
Returns: additionalInformation (string), ageGatedContent (boolean), businessAddr1 (string), businessAddr2 (string), businessCity (string), businessContactEmail (string), businessContactFirstName (string), businessContactLastName (string), businessContactPhone (string), businessName (string), businessRegistrationCountry (string), businessRegistrationNumber (string), businessRegistrationType (string), businessState (string), businessZip (string), campaignVerifyAuthorizationToken (string | null), corporateWebsite (string), doingBusinessAs (string), entityType (object), helpMessageResponse (string), id (uuid), isvReseller (string), messageVolume (object), optInConfirmationResponse (string), optInKeywords (string), optInWorkflow (string), optInWorkflowImageURLs (array[object]), phoneNumbers (array[object]), privacyPolicyURL (string), productionMessageContent (string), termsAndConditionURL (string), useCase (object), useCaseSummary (string), verificationRequestId (string), verificationStatus (object), webhookUrl (string)
Get Verification Request
Get a single verification request by its ID.
GET /messaging_tollfree/verification/requests/{id}
import com.telnyx.sdk.models.messagingtollfree.verification.requests.RequestRetrieveParams;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.VerificationRequestStatus;
VerificationRequestStatus verificationRequestStatus = client.messagingTollfree().verification().requests().retrieve("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e");
Returns: additionalInformation (string), ageGatedContent (boolean), businessAddr1 (string), businessAddr2 (string), businessCity (string), businessContactEmail (string), businessContactFirstName (string), businessContactLastName (string), businessContactPhone (string), businessName (string), businessRegistrationCountry (string), businessRegistrationNumber (string), businessRegistrationType (string), businessState (string), businessZip (string), campaignVerifyAuthorizationToken (string | null), corporateWebsite (string), createdAt (date-time), doingBusinessAs (string), entityType (object), helpMessageResponse (string), id (uuid), isvReseller (string), messageVolume (object), optInConfirmationResponse (string), optInKeywords (string), optInWorkflow (string), optInWorkflowImageURLs (array[object]), phoneNumbers (array[object]), privacyPolicyURL (string), productionMessageContent (string), reason (string), termsAndConditionURL (string), updatedAt (date-time), useCase (object), useCaseSummary (string), verificationStatus (object), webhookUrl (string)
Update Verification Request
Update an existing tollfree verification request. This is particularly useful when there are pending customer actions to be taken.
PATCH /messaging_tollfree/verification/requests/{id} — Required: businessName, corporateWebsite, businessAddr1, businessCity, businessState, businessZip, businessContactFirstName, businessContactLastName, businessContactEmail, businessContactPhone, messageVolume, phoneNumbers, useCase, useCaseSummary, productionMessageContent, optInWorkflow, optInWorkflowImageURLs, additionalInformation
Optional: ageGatedContent (boolean), businessAddr2 (string), businessRegistrationCountry (string | null), businessRegistrationNumber (string | null), businessRegistrationType (string | null), campaignVerifyAuthorizationToken (string | null), doingBusinessAs (string | null), entityType (object), helpMessageResponse (string | null), isvReseller (string | null), optInConfirmationResponse (string | null), optInKeywords (string | null), privacyPolicyURL (string | null), termsAndConditionURL (string | null), webhookUrl (string)
import com.telnyx.sdk.models.messagingtollfree.verification.requests.RequestUpdateParams;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.TfPhoneNumber;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.TfVerificationRequest;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.Url;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.UseCaseCategories;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.VerificationRequestEgress;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.Volume;
RequestUpdateParams params = RequestUpdateParams.builder()
.id("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
.tfVerificationRequest(TfVerificationRequest.builder()
.additionalInformation("additionalInformation")
.businessAddr1("600 Congress Avenue")
.businessCity("Austin")
.businessContactEmail("email@example.com")
.businessContactFirstName("John")
.businessContactLastName("Doe")
.businessContactPhone("+18005550100")
.businessName("Telnyx LLC")
.businessState("Texas")
.businessZip("78701")
.corporateWebsite("http://example.com")
.messageVolume(Volume.V_100000)
.optInWorkflow("User signs into the Telnyx portal, enters a number and is prompted to select whether they want to use 2FA verification for security purposes. If they've opted in a confirmation message is sent out to the handset")
.addOptInWorkflowImageUrl(Url.builder()
.url("https://telnyx.com/sign-up")
.build())
.addOptInWorkflowImageUrl(Url.builder()
.url("https://telnyx.com/company/data-privacy")
.build())
.addPhoneNumber(TfPhoneNumber.builder()
.phoneNumber("+18773554398")
.build())
.addPhoneNumber(TfPhoneNumber.builder()
.phoneNumber("+18773554399")
.build())
.productionMessageContent("Your Telnyx OTP is XXXX")
.useCase(UseCaseCategories.TWO_FA)
.useCaseSummary("This is a use case where Telnyx sends out 2FA codes to portal users to verify their identity in order to sign into the portal")
.build())
.build();
VerificationRequestEgress verificationRequestEgress = client.messagingTollfree().verification().requests().update(params);
Returns: additionalInformation (string), ageGatedContent (boolean), businessAddr1 (string), businessAddr2 (string), businessCity (string), businessContactEmail (string), businessContactFirstName (string), businessContactLastName (string), businessContactPhone (string), businessName (string), businessRegistrationCountry (string), businessRegistrationNumber (string), businessRegistrationType (string), businessState (string), businessZip (string), campaignVerifyAuthorizationToken (string | null), corporateWebsite (string), doingBusinessAs (string), entityType (object), helpMessageResponse (string), id (uuid), isvReseller (string), messageVolume (object), optInConfirmationResponse (string), optInKeywords (string), optInWorkflow (string), optInWorkflowImageURLs (array[object]), phoneNumbers (array[object]), privacyPolicyURL (string), productionMessageContent (string), termsAndConditionURL (string), useCase (object), useCaseSummary (string), verificationRequestId (string), verificationStatus (object), webhookUrl (string)
Delete Verification Request
Delete a verification request
A request may only be deleted when when the request is in the "rejected" state. * HTTP 200: request successfully deleted
HTTP 400: request exists but can't be deleted (i.e. not rejected)HTTP 404: request unknown or already deleted
DELETE /messaging_tollfree/verification/requests/{id}
import com.telnyx.sdk.models.messagingtollfree.verification.requests.RequestDeleteParams;
client.messagingTollfree().verification().requests().delete("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e");
Get Verification Request Status History
Get the history of status changes for a verification request. Returns a paginated list of historical status changes including the reason for each change and when it occurred.
GET /messaging_tollfree/verification/requests/{id}/status_history
import com.telnyx.sdk.models.messagingtollfree.verification.requests.RequestRetrieveStatusHistoryParams;
import com.telnyx.sdk.models.messagingtollfree.verification.requests.RequestRetrieveStatusHistoryResponse;
RequestRetrieveStatusHistoryParams params = RequestRetrieveStatusHistoryParams.builder()
.id("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
.pageNumber(1L)
.pageSize(1L)
.build();
RequestRetrieveStatusHistoryResponse response = client.messagingTollfree().verification().requests().retrieveStatusHistory(params);
Returns: records (array[object]), total_records (integer)
List messaging URL domains
GET /messaging_url_domains
import com.telnyx.sdk.models.messagingurldomains.MessagingUrlDomainListPage;
import com.telnyx.sdk.models.messagingurldomains.MessagingUrlDomainListParams;
MessagingUrlDomainListPage page = client.messagingUrlDomains().list();
Returns: id (string), record_type (string), url_domain (string), use_case (string)