Telnyx Numbers Services - Go

Installation

go get github.com/team-telnyx/telnyx-go

Setup

import (
  "context"
  "fmt"
  "os"

  "github.com/team-telnyx/telnyx-go"
  "github.com/team-telnyx/telnyx-go/option"
)

client := telnyx.NewClient(
  option.WithAPIKey(os.Getenv("TELNYX_API_KEY")),
)

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 "errors"

result, err := client.Messages.Send(ctx, params)
if err != nil {
  var apiErr *telnyx.Error
  if errors.As(err, &apiErr) {
    switch apiErr.StatusCode {
    case 422:
      fmt.Println("Validation error — check required fields and formats")
    case 429:
      // Rate limited — wait and retry with exponential backoff
      fmt.Println("Rate limited, retrying...")
    default:
      fmt.Printf("API error %d: %s\n", apiErr.StatusCode, apiErr.Error())
    }
  } else {
    fmt.Println("Network error — check connectivity and retry")
  }
}

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

• Pagination: Use ListAutoPaging() for automatic iteration: iter := client.Resource.ListAutoPaging(ctx, params); for iter.Next() { item := iter.Current() }.

List your voice channels for non-US zones

Returns the non-US voice channels for your account. voice channels allow you to use Channel Billing for calls to your Telnyx phone numbers. Please check the Telnyx Support Articles section for full information and examples of how to utilize Channel Billing.

GET /channel_zones

	page, err := client.ChannelZones.List(context.Background(), telnyx.ChannelZoneListParams{})
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", page)

Returns: channels (int64), countries (array[string]), created_at (string), id (string), name (string), record_type (enum: channel_zone), updated_at (string)

Update voice channels for non-US Zones

Update the number of Voice Channels for the Non-US Zones. This allows your account to handle multiple simultaneous inbound calls to Non-US numbers. Use this endpoint to increase or decrease your capacity based on expected call volume.

PUT /channel_zones/{channel_zone_id} — Required: channels

	channelZone, err := client.ChannelZones.Update(
		context.Background(),
		"channel_zone_id",
		telnyx.ChannelZoneUpdateParams{
			Channels: 0,
		},
	)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", channelZone.ID)

Returns: channels (int64), countries (array[string]), created_at (string), id (string), name (string), record_type (enum: channel_zone), updated_at (string)

List dynamic emergency addresses

Returns the dynamic emergency addresses according to filters

GET /dynamic_emergency_addresses

	page, err := client.DynamicEmergencyAddresses.List(context.Background(), telnyx.DynamicEmergencyAddressListParams{})
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", page)

Returns: administrative_area (string), country_code (enum: US, CA, PR), created_at (string), extended_address (string), house_number (string), house_suffix (string), id (string), locality (string), postal_code (string), record_type (string), sip_geolocation_id (string), status (enum: pending, activated, rejected), street_name (string), street_post_directional (string), street_pre_directional (string), street_suffix (string), updated_at (string)

Create a dynamic emergency address.

Creates a dynamic emergency address.

POST /dynamic_emergency_addresses — Required: house_number, street_name, locality, administrative_area, postal_code, country_code

Optional: created_at (string), extended_address (string), house_suffix (string), id (string), record_type (string), sip_geolocation_id (string), status (enum: pending, activated, rejected), street_post_directional (string), street_pre_directional (string), street_suffix (string), updated_at (string)

	dynamicEmergencyAddress, err := client.DynamicEmergencyAddresses.New(context.Background(), telnyx.DynamicEmergencyAddressNewParams{
		DynamicEmergencyAddress: telnyx.DynamicEmergencyAddressParam{
			AdministrativeArea: "TX",
			CountryCode:        telnyx.DynamicEmergencyAddressCountryCodeUs,
			HouseNumber:        "600",
			Locality:           "Austin",
			PostalCode:         "78701",
			StreetName:         "Congress",
		},
	})
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", dynamicEmergencyAddress.Data)

Returns: administrative_area (string), country_code (enum: US, CA, PR), created_at (string), extended_address (string), house_number (string), house_suffix (string), id (string), locality (string), postal_code (string), record_type (string), sip_geolocation_id (string), status (enum: pending, activated, rejected), street_name (string), street_post_directional (string), street_pre_directional (string), street_suffix (string), updated_at (string)

Get a dynamic emergency address

Returns the dynamic emergency address based on the ID provided

GET /dynamic_emergency_addresses/{id}

	dynamicEmergencyAddress, err := client.DynamicEmergencyAddresses.Get(context.Background(), "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", dynamicEmergencyAddress.Data)

Returns: administrative_area (string), country_code (enum: US, CA, PR), created_at (string), extended_address (string), house_number (string), house_suffix (string), id (string), locality (string), postal_code (string), record_type (string), sip_geolocation_id (string), status (enum: pending, activated, rejected), street_name (string), street_post_directional (string), street_pre_directional (string), street_suffix (string), updated_at (string)

Delete a dynamic emergency address

Deletes the dynamic emergency address based on the ID provided

DELETE /dynamic_emergency_addresses/{id}

	dynamicEmergencyAddress, err := client.DynamicEmergencyAddresses.Delete(context.Background(), "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", dynamicEmergencyAddress.Data)

Returns: administrative_area (string), country_code (enum: US, CA, PR), created_at (string), extended_address (string), house_number (string), house_suffix (string), id (string), locality (string), postal_code (string), record_type (string), sip_geolocation_id (string), status (enum: pending, activated, rejected), street_name (string), street_post_directional (string), street_pre_directional (string), street_suffix (string), updated_at (string)

List dynamic emergency endpoints

Returns the dynamic emergency endpoints according to filters

GET /dynamic_emergency_endpoints

	page, err := client.DynamicEmergencyEndpoints.List(context.Background(), telnyx.DynamicEmergencyEndpointListParams{})
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", page)

Returns: callback_number (string), caller_name (string), created_at (string), dynamic_emergency_address_id (string), id (string), record_type (string), sip_from_id (string), status (enum: pending, activated, rejected), updated_at (string)

Create a dynamic emergency endpoint.

Creates a dynamic emergency endpoints.

POST /dynamic_emergency_endpoints — Required: dynamic_emergency_address_id, callback_number, caller_name

Optional: created_at (string), id (string), record_type (string), sip_from_id (string), status (enum: pending, activated, rejected), updated_at (string)

	dynamicEmergencyEndpoint, err := client.DynamicEmergencyEndpoints.New(context.Background(), telnyx.DynamicEmergencyEndpointNewParams{
		DynamicEmergencyEndpoint: telnyx.DynamicEmergencyEndpointParam{
			CallbackNumber:            "+13125550000",
			CallerName:                "Jane Doe Desk Phone",
			DynamicEmergencyAddressID: "0ccc7b54-4df3-4bca-a65a-3da1ecc777f0",
		},
	})
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", dynamicEmergencyEndpoint.Data)

Returns: callback_number (string), caller_name (string), created_at (string), dynamic_emergency_address_id (string), id (string), record_type (string), sip_from_id (string), status (enum: pending, activated, rejected), updated_at (string)

Get a dynamic emergency endpoint

Returns the dynamic emergency endpoint based on the ID provided

GET /dynamic_emergency_endpoints/{id}

	dynamicEmergencyEndpoint, err := client.DynamicEmergencyEndpoints.Get(context.Background(), "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", dynamicEmergencyEndpoint.Data)

Returns: callback_number (string), caller_name (string), created_at (string), dynamic_emergency_address_id (string), id (string), record_type (string), sip_from_id (string), status (enum: pending, activated, rejected), updated_at (string)

Delete a dynamic emergency endpoint

Deletes the dynamic emergency endpoint based on the ID provided

DELETE /dynamic_emergency_endpoints/{id}

	dynamicEmergencyEndpoint, err := client.DynamicEmergencyEndpoints.Delete(context.Background(), "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", dynamicEmergencyEndpoint.Data)

Returns: callback_number (string), caller_name (string), created_at (string), dynamic_emergency_address_id (string), id (string), record_type (string), sip_from_id (string), status (enum: pending, activated, rejected), updated_at (string)

List your voice channels for US Zone

Returns the US Zone voice channels for your account. voice channels allows you to use Channel Billing for calls to your Telnyx phone numbers. Please check the Telnyx Support Articles section for full information and examples of how to utilize Channel Billing.

GET /inbound_channels

	inboundChannels, err := client.InboundChannels.List(context.Background())
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", inboundChannels.Data)

Returns: channels (integer), record_type (string)

Update voice channels for US Zone

Update the number of Voice Channels for the US Zone. This allows your account to handle multiple simultaneous inbound calls to US numbers. Use this endpoint to increase or decrease your capacity based on expected call volume.

PATCH /inbound_channels — Required: channels

	inboundChannel, err := client.InboundChannels.Update(context.Background(), telnyx.InboundChannelUpdateParams{
		Channels: 7,
	})
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", inboundChannel.Data)

Returns: channels (integer), record_type (string)

List All Numbers using Channel Billing

Retrieve a list of all phone numbers using Channel Billing, grouped by Zone.

GET /list

	response, err := client.List.GetAll(context.Background())
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", response.Data)

Returns: number_of_channels (integer), numbers (array[object]), zone_id (string), zone_name (string)

List Numbers using Channel Billing for a specific Zone

Retrieve a list of phone numbers using Channel Billing for a specific Zone.

GET /list/{channel_zone_id}

	response, err := client.List.GetByZone(context.Background(), "channel_zone_id")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", response.Data)

Returns: number_of_channels (integer), numbers (array[object]), zone_id (string), zone_name (string)

Get voicemail

Returns the voicemail settings for a phone number

GET /phone_numbers/{phone_number_id}/voicemail

	voicemail, err := client.PhoneNumbers.Voicemail.Get(context.Background(), "123455678900")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", voicemail.Data)

Returns: enabled (boolean), pin (string)

Create voicemail

Create voicemail settings for a phone number

POST /phone_numbers/{phone_number_id}/voicemail

Optional: enabled (boolean), pin (string)

	voicemail, err := client.PhoneNumbers.Voicemail.New(
		context.Background(),
		"123455678900",
		telnyx.PhoneNumberVoicemailNewParams{
			VoicemailRequest: telnyx.VoicemailRequestParam{},
		},
	)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", voicemail.Data)

Returns: enabled (boolean), pin (string)

Update voicemail

Update voicemail settings for a phone number

PATCH /phone_numbers/{phone_number_id}/voicemail

Optional: enabled (boolean), pin (string)

	voicemail, err := client.PhoneNumbers.Voicemail.Update(
		context.Background(),
		"123455678900",
		telnyx.PhoneNumberVoicemailUpdateParams{
			VoicemailRequest: telnyx.VoicemailRequestParam{},
		},
	)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%+v\n", voicemail.Data)

Returns: enabled (boolean), pin (string)