# POST /api/workflows.stepCompleted stops working

Calls to POST /api/workflows.stepCompleted on Slack stopped working on September 26, 2024.

On September 26, 2024, calls to POST /api/workflows.stepCompleted stopped working. The method ceased functioning on that date, causing any requests sent to the endpoint to fail.

## What to use instead

Rebuild Steps from Apps as custom functions for the new Workflow Builder.

- API: Slack (slack.com)
- Kind: Endpoint removal
- Announced: August 22, 2023
- Takes effect: September 26, 2024
- Calls after that day: fail
- Calls it hits: `POST /api/workflows.stepCompleted`
- Source: [Announcement](https://docs.slack.dev/changelog/2023-08-workflow-steps-from-apps-step-back)
- Verified: November 6, 2026, against Slack's own pages
- Page: https://www.okapi.bot/providers/slack/breaking-changes/post-api-workflows-stepcompleted-stops-working/

## Slack's words

> The Web API methods workflows.stepCompleted, workflows.stepFailed, and workflows.updateStep will all cease functioning.

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent