funcX client and endpoint software releases are available on PyPI.

The latest version available on PyPI is v0.3.0.

You can try funcX on Binder


funcX comes with two components: the endpoint, a user-managed software agent that must be deployed on a compute resource to make it accessible for function execution; and the funcX client, which provides a Python API for registration, execution, and management of functions across endpoints.

The pre-requisites for the funcX endpoint and the funcX client are

  1. Python3.6+
  2. The machine must have outbound network access

To check if you have the right Python version, run the following commands:

>>> python3 --version

This should return the Python version, for example: Python 3.6.7.

To check if your endpoint/client have network access and can connect to the funcX service, run

>>> curl https://api2.funcx.org/v2/version

This should return a version string, for example: "0.3.0"


The funcx client is supported on MacOS, Linux, and Windows. The funcx-endpoint is only supported on Linux.

Installation using Pip

While pip and pip3 can be used to install funcX we suggest the following approach for reliable installation when many Python environments are available.

  1. Install the funcX client:

    $ python3 -m pip install funcx

To update a previously installed funcX to a newer version, use: python3 -m pip install -U funcx

  1. Optionally install the funcX endpoint:

    $ python3 -m pip install funcx_endpoint
  2. Install Jupyter for Tutorial notebooks:

    $ python3 -m pip install jupyter


For more detailed info on setting up Jupyter with Python3.5 go here

Running a function

After installing the funcX SDK, you can register functions and execute them on available endpoints. To use the SDK, you should first instantiate a funcX client and authenticate with the funcX service. funcX uses Globus to manage authentication and authorization, enabling you to authenticate using one of several hundred supported identity providers (e.g., institution, ORCID, Google). If you have not authenticated previously, funcX will present a one-time URL that you can use to authenticate with your chosen identity. You will then need to copy and paste the resulting access code into the prompt.

from funcx.sdk.client import FuncXClient

fxc = FuncXClient()

Like most FaaS platforms, you must first register a function before you can execute or share it. To do so, you can simply write a Python function and register it using the SDK.

def add_func(a, b):
  return a + b

func_uuid = fxc.register_function(add_func)

When executing the function, you must specify the function ID and the endpoint ID on which you wish to execute the function. You can pass arbitrary input arguments like standard Python functions. The following code shows how to run the add function on the tutorial endpoint.

Note: the tutorial endpoint is open for anyone to use; please limit the number of functions you send to this endpoint.

tutorial_endpoint = '4b116d3c-1703-4f8f-9f6f-39921e5864df' # Public tutorial endpoint
res = fxc.run(5, 10, function_id=func_uuid, endpoint_id=tutorial_endpoint)

Finally, you can retrieve the result (or check on the status of the execution) via the SDK. The SDK will raise an exception if the result is not yet ready or it will return the Python result from your function.

Note: the tutorial endpoint is hosted on a small Kubernetes cluster and occasionally it becomes overwhelmed. If you are unable to retrieve the result, please try again later (funcX will cache results until you return) or deploy an endpoint on local resources.


Deploying an endpoint

You can deploy an endpoint on your laptop, cluster, or cloud by downloading and installing the funcX endpoint software. The funcX endpoint software is available on PyPI and a default endpoint can be configured and started as follows. During the configuration process you will be prompted to authenticate following the same process as using the SDK. For more advanced deployments (e.g., on clouds and clusters) please refer to the endpoints documentation.

$ python3 -m pip install funcx_endpoint

$ funcx-endpoint configure

$ funcx-endpoint start <ENDPOINT_NAME>