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Python bindings for the Telnyx API

Project description

Telnyx Python Library

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The Telnyx Python library provides convenient access to the Telnyx API from applications written in the Python language. It includes a pre-defined set of classes for API resources that initialize themselves dynamically from API responses which makes it compatible with a wide range of versions of the Telnyx API.


See the API Reference and the Setup Guides.


You don't need this source code unless you want to modify the package. If you just want to use the package, just run:

pip install --upgrade telnyx

Install from source with:

python install

Non x86/x86_64 Processors

The telnyx package is distributed as a wheel (pre-compiled package) for easy installation. The wheel is built only for x86/x86_64 processors. When installing the package on a different architecture, like ARM, the pip installer will fall back to installing from source. As a result, you will need to ensure you have the additional dependencies installed. This will affect you if you're using a Raspberry Pi, for example.

For ARM specifically, as an alternative to a source install, you could look into using for ARM compiled wheels.


  • Python 3.8+ (PyPy supported)

Additional Requirements for Source Install

  • build-essentials (gcc, make)
  • python-dev
  • libffi-dev

These packages are listed as they are named on Ubuntu.


The library needs to be configured with your account's API Key which is available in your Telnyx Dashboard. Set telnyx.api_key to its value:

import telnyx
telnyx.api_key = "KEY01234_yoursecretkey"

# Retrieve single Messaging Profile

# List Messaging Profiles
profiles = telnyx.MessagingProfile.list()

# Retrieve next page of list results

# Loop over all page results
for page in profiles.auto_paging_iter():

You can read more about our API Keys here.

Per-Request Configuration

For apps that need to use multiple keys during the lifetime of a process, it's also possible to set a per-request key and/or account:

import telnyx

# list messaging profiles

# retrieve single messaging profile

Configuring an HTTP Client

The library can be configured to use urlfetch, requests, pycurl, or urllib2 with telnyx.default_http_client:

client = telnyx.http_client.UrlFetchClient()
client = telnyx.http_client.RequestsClient()
client = telnyx.http_client.PycurlClient()
client = telnyx.http_client.Urllib2Client()
telnyx.default_http_client = client

Without a configured client, by default the library will attempt to load libraries in the order above (i.e. urlfetch is preferred with urllib2 used as a last resort). We usually recommend that people use requests.

Configuring a Proxy

A proxy can be configured with telnyx.proxy:

telnyx.proxy = ""

Configuring Automatic Retries

Number of automatic retries on requests that fail due to an intermittent network problem can be configured:

telnyx.max_network_retries = 2

Reserved word keyword arguments

The Telnyx API includes from as an attribute that can be set on messages. from is also a reserved word in Python. If you would like to use keyword arguments where an argument is a reserved word you can add the suffix _ e.g.


The argument will be automatically rewritten to from in the keyword arguments dict.

Pro Tip: You can alternatively unpack a dictionary like so:

message = {
    "from": "+18445550001",
    "to": "+18665550001",
    "text": "Foo",


The library can be configured to emit logging that will give you better insight into what it's doing. The info logging level is usually most appropriate for production use, but debug is also available for more verbosity.

There are a few options for enabling it:

  1. Set the environment variable TELNYX_LOG to the value debug or info

    $ export TELNYX_LOG=debug
  2. Set telnyx.log:

    import telnyx
    telnyx.log = 'debug'
  3. Enable it through Python's logging module:

    import logging

Writing a Plugin

If you're writing a plugin that uses the library, we'd appreciate it if you identified using telnyx.set_app_info():

telnyx.set_app_info("MyAwesomePlugin", version="1.2.34", url="")

This information is passed along when the library makes calls to the Telnyx API.


The test suite depends on telnyx-mock, so make sure to fetch and run it from a background terminal (telnyx-mock's README also contains instructions for installing via Homebrew and other methods):

go get -u

Install pipenv, then install all dependencies for the project:

pipenv install --dev

Run all tests on all supported Python versions:

make test

Run all tests for a specific Python version (modify -e according to your Python target):

pipenv run tox -e py38

Run all tests in a single file:

pipenv run tox -e py38 -- tests/api_resources/abstract/

Run a single test suite:

pipenv run tox -e py38 -- tests/api_resources/abstract/

Run a single test:

pipenv run tox -e py38 -- tests/api_resources/abstract/

Run the linter with:

make lint

The library uses Black for code formatting. Code must be formatted with Black before PRs are submitted, otherwise CI will fail. Run the formatter with:

make fmt

Adding a new endpoint

  1. Define a class for the object that the endpoint interacts with under telnyx/api_resources/. The path name singularized should typically match the record type of the object returned e.g. /v2/available_phone_numbers returns a list of objects with the record_type available_phone_number. Inherit from the classes that define the behavior available on the endpoint,one or more of CreateableAPIResource, DeletableAPIResource, ListableAPIResource, UpdateableAPIResource.

  2. Import your class in telnyx/api_resources/

  3. Add your new class to the OBJECT_CLASSES block in telnyx/

  4. Add tests for your new class under tests/api_resources/.


  1. Update version in
    • (in the setup() call, the version kwarg)
    • telnyx/ (the __version__ string)
  2. Create new branch, add changes, commit, and push
  3. Ensure commit passes tests in Travis
  4. Tag that commit with git tag -a v{VERSION} -m "Release v{VERSION}", and push the tag git push --follow-tags
  5. Ensure checked out copy is entirely clean (best to create a new environment...)
  6. make dists
  7. If you haven't done it before, download the upload API keys from LastPass (search for "pypi") and put the contents between "PYPIRC FILE" tags into ~/.pypirc-telnyx.
  8. make testupload, check that it looks OK on PyPI and that it's installable via pip.
  9. make liveupload, repeat checks for live version.
  10. Ta-da.


The contributors and maintainers of Telnyx Python would like to extend their deep gratitude to the authors of Stripe Python, upon which this project is based. Thank you for developing such elegant, usable, and extensible code and for sharing it with the community.

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