Custom Code AI for Workflows in Sparkforge

By Sparkforge Support Team ·Last reviewed May 3, 2026

Custom Code AI (Beta) writes JavaScript for Sparkforge workflow Custom Code actions from a plain-English prompt. Describe what you want, click Generate, and insert the snippet.

Writing JavaScript inside a Sparkforge workflow used to mean coding from scratch, manually mapping input properties from earlier steps, and debugging by hand. Custom Code AI (Beta) shortcuts all of that — describe the behavior you want, and the AI writes the JavaScript and wires up the relevant inputs.

What it does

  • Generates JavaScript from plain language — describe the logic, get working code.
  • Maps workflow inputs automatically — picks up properties from earlier steps based on your description.
  • One-click insert — review the output and drop it into the action.
  • Regenerate — refine the prompt or ask for changes and run it again.

How to use Custom Code AI

  1. Add a Custom Code action to your workflow.
  2. Click Build with AI to open the assistant.
  3. Describe what you want the code to do. Be specific. Example: "I have an API that returns dates as MM-DD-YYYY. Convert them to YYYY-MM-DD."
  4. Click Generate. The AI writes the JavaScript and references the relevant input properties.
  5. Need a tweak? Type the change in the text box and click Regenerate.
  6. Click Use Code to insert the snippet.

Common use cases

  • Data formatting — phone number normalization, date conversion, casing fixes.
  • API integration — outbound HTTP requests to external services.
  • Math — interest, discounts, fees, conversions.
  • String manipulation — pull email addresses out of subject lines, parse names, trim noise.
  • Conditional logic — route leads, branch on score, set tags based on rules.

Tip for better output

The more specific the prompt, the better the code. Mention input names, expected output format, and edge cases (empty values, bad data) up front so the generated snippet handles them.

Frequently Asked Questions

Do I need to know JavaScript to use Custom Code AI?
No. You describe the behavior in plain English and the AI writes the JavaScript. Reading the output to confirm it does what you want is still a good habit.
Can I edit the AI-generated code before using it?
Yes. After insertion, the code is editable in the Custom Code action exactly like any hand-written snippet. You can also regenerate with a refined prompt instead of editing manually.
Does Custom Code AI know about my workflow's variables?
It reads the input properties available from earlier workflow steps and references them in the generated code when relevant. Mention the input names in your prompt if you want a specific mapping.
Is Custom Code AI available on every Sparkforge plan?
Workflow Custom Code actions ship with Sparkforge Standard and Pro. Custom Code AI runs inside that action, so any plan with workflows and Custom Code can use it.

Was this article helpful?

Related Articles