npm install telnyx

import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

try {
  const result = await client.messages.send({ to: '+13125550001', from: '+13125550002', text: 'Hello' });
} catch (err) {
  if (err instanceof Telnyx.APIConnectionError) {
    console.error('Network error — check connectivity and retry');
  } else if (err instanceof Telnyx.RateLimitError) {
    // 429: rate limited — wait and retry with exponential backoff
    const retryAfter = err.headers?.['retry-after'] || 1;
    await new Promise(r => setTimeout(r, retryAfter * 1000));
  } else if (err instanceof Telnyx.APIError) {
    console.error(`API error ${err.status}: ${err.message}`);
    if (err.status === 422) {
      console.error('Validation error — check required fields and formats');
    }
  }
}

const response = await client.texml.accounts.calls.retrieveCalls('account_sid');

console.log(response.calls);

const response = await client.texml.accounts.calls.calls('account_sid', {
  ApplicationSid: 'example-app-sid',
  From: '+13120001234',
  To: '+13121230000',
});

console.log(response.from);

const call = await client.texml.accounts.calls.retrieve('call_sid', { account_sid: '550e8400-e29b-41d4-a716-446655440000' });

console.log(call.account_sid);

const call = await client.texml.accounts.calls.update('call_sid', { account_sid: '550e8400-e29b-41d4-a716-446655440000' });

console.log(call.account_sid);

const response = await client.texml.accounts.calls.recordingsJson.retrieveRecordingsJson(
  'call_sid',
  { account_sid: '550e8400-e29b-41d4-a716-446655440000' },
);

console.log(response.end);

const response = await client.texml.accounts.calls.recordingsJson.recordingsJson('call_sid', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
});

console.log(response.account_sid);

const response = await client.texml.accounts.calls.recordings.recordingSidJson(
  '6a09cdc3-8948-47f0-aa62-74ac943d6c58',
  { account_sid: '550e8400-e29b-41d4-a716-446655440000', call_sid: '550e8400-e29b-41d4-a716-446655440000' },
);

console.log(response.account_sid);

const response = await client.texml.accounts.calls.siprecJson('call_sid', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
});

console.log(response.account_sid);

const response = await client.texml.accounts.calls.siprec.siprecSidJson('siprec_sid', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
  call_sid: '550e8400-e29b-41d4-a716-446655440000',
});

console.log(response.account_sid);

const response = await client.texml.accounts.calls.streamsJson('call_sid', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
});

console.log(response.account_sid);

const response = await client.texml.accounts.calls.streams.streamingSidJson(
  '6a09cdc3-8948-47f0-aa62-74ac943d6c58',
  { account_sid: '550e8400-e29b-41d4-a716-446655440000', call_sid: '550e8400-e29b-41d4-a716-446655440000' },
);

console.log(response.account_sid);

const response = await client.texml.accounts.conferences.retrieveConferences('account_sid');

console.log(response.conferences);

const conference = await client.texml.accounts.conferences.retrieve('conference_sid', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
});

console.log(conference.account_sid);

const conference = await client.texml.accounts.conferences.update('conference_sid', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
});

console.log(conference.account_sid);

const response = await client.texml.accounts.conferences.participants.retrieveParticipants(
  'conference_sid',
  { account_sid: '550e8400-e29b-41d4-a716-446655440000' },
);

console.log(response.end);

const response = await client.texml.accounts.conferences.participants.participants(
  'conference_sid',
  { account_sid: '550e8400-e29b-41d4-a716-446655440000' },
);

console.log(response.account_sid);

const participant = await client.texml.accounts.conferences.participants.retrieve(
  'call_sid_or_participant_label',
  { account_sid: '550e8400-e29b-41d4-a716-446655440000', conference_sid: '550e8400-e29b-41d4-a716-446655440000' },
);

console.log(participant.account_sid);

const participant = await client.texml.accounts.conferences.participants.update(
  'call_sid_or_participant_label',
  { account_sid: '550e8400-e29b-41d4-a716-446655440000', conference_sid: '550e8400-e29b-41d4-a716-446655440000' },
);

console.log(participant.account_sid);

await client.texml.accounts.conferences.participants.delete('call_sid_or_participant_label', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
  conference_sid: '550e8400-e29b-41d4-a716-446655440000',
});

const response = await client.texml.accounts.conferences.retrieveRecordings('conference_sid', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
});

console.log(response.end);

const response = await client.texml.accounts.conferences.retrieveRecordingsJson('conference_sid', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
});

console.log(response.end);

// Automatically fetches more pages as needed.
for await (const queueListResponse of client.texml.accounts.queues.list('account_sid')) {
  console.log(queueListResponse.account_sid);
}

const queue = await client.texml.accounts.queues.create('account_sid');

console.log(queue.account_sid);

const queue = await client.texml.accounts.queues.retrieve('queue_sid', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
});

console.log(queue.account_sid);

const queue = await client.texml.accounts.queues.update('queue_sid', {
  account_sid: '550e8400-e29b-41d4-a716-446655440000',
});

console.log(queue.account_sid);

await client.texml.accounts.queues.delete('queue_sid', { account_sid: '550e8400-e29b-41d4-a716-446655440000' });

const response = await client.texml.accounts.retrieveRecordingsJson('account_sid');

console.log(response.end);

const texmlGetCallRecordingResponseBody =
  await client.texml.accounts.recordings.json.retrieveRecordingSidJson(
    '6a09cdc3-8948-47f0-aa62-74ac943d6c58',
    { account_sid: '550e8400-e29b-41d4-a716-446655440000' },
  );

console.log(texmlGetCallRecordingResponseBody.account_sid);

await client.texml.accounts.recordings.json.deleteRecordingSidJson(
  '6a09cdc3-8948-47f0-aa62-74ac943d6c58',
  { account_sid: '550e8400-e29b-41d4-a716-446655440000' },
);

const response = await client.texml.accounts.retrieveTranscriptionsJson('account_sid');

console.log(response.end);

const response =
  await client.texml.accounts.transcriptions.json.retrieveRecordingTranscriptionSidJson(
    '6a09cdc3-8948-47f0-aa62-74ac943d6c58',
    { account_sid: '550e8400-e29b-41d4-a716-446655440000' },
  );

console.log(response.account_sid);

await client.texml.accounts.transcriptions.json.deleteRecordingTranscriptionSidJson(
  '6a09cdc3-8948-47f0-aa62-74ac943d6c58',
  { account_sid: '550e8400-e29b-41d4-a716-446655440000' },
);

const response = await client.texml.secrets({ name: 'My Secret Name', value: 'My Secret Value' });

console.log(response.data);

// Automatically fetches more pages as needed.
for await (const texmlApplication of client.texmlApplications.list()) {
  console.log(texmlApplication.id);
}

const texmlApplication = await client.texmlApplications.create({
  friendly_name: 'call-router',
  voice_url: 'https://example.com',
});

console.log(texmlApplication.data);

const texmlApplication = await client.texmlApplications.retrieve('1293384261075731499');

console.log(texmlApplication.data);

const texmlApplication = await client.texmlApplications.update('1293384261075731499', {
  friendly_name: 'call-router',
  voice_url: 'https://example.com',
});

console.log(texmlApplication.data);

const texmlApplication = await client.texmlApplications.delete('1293384261075731499');

console.log(texmlApplication.data);