If you want to execute a function and return a value, you can use our Execute Function API.

While our Execute Code API is great for running scripts, it can be cumbersome to return values from a function, since we only have access to stdout and stderr. The Execute Function API is designed to make it easier to pass values to and from a function in a way that’s more natural to programmers and LLMs alike.

This API supports Python, JavaScript, and TypeScript. It requires you to write your code in a specific way, with a function execute that takes a single argument input. Your function must also return a value that can be serialized to JSON.

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Writing your execute function

The only rules are that your function must be named execute, take a single argument input, and return a value that can be serialized to JSON. This function will be passed as the code argument to your API call.

Our execution environment will automatically execute your function as long as it’s named correctly.

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Passing input to the function

When calling the API, you can pass an input argument to your request. This will be passed to your function as the input argument. If you omit input in your execution request, your function will receive null as input.

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Output

The output of a function execution will contain both the output of the function as well as the execution details (exit_code, stdout, stderr).

We will also return an output_status field, which will be valid if the function returned a valid JSON object; json_serialization_error if the function returned a value that could not be serialized to JSON; and error if your function raised an error during execution.

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