---
title: "Rebuild the AI topic plan across the campaign's steps"
method: POST
path: "/business/campaigns/{campaignId}/steps/regenerate-topics"
tags: ["Campaign steps"]
---

# Rebuild the AI topic plan across the campaign's steps

`POST /business/campaigns/{campaignId}/steps/regenerate-topics`

## Request

- Base URL: `https://api.tryfuse.ai/api/v1`
- URL: `https://api.tryfuse.ai/api/v1/business/campaigns/{campaignId}/steps/regenerate-topics`
- Auth: HTTP basic

Rebuilds the AI topic plan across the campaign's `ai_generated` steps in one pass, so the sequence reads as one narrative instead of a set of independently written steps. Manual steps are left alone, which is why `regeneratedStepCount` can be smaller than `totalStepCount`. It rewrites step topics and titles only - queued sends already created are not rewritten. Only the token owner's own campaigns can be regenerated: a campaign delegated to you, one shared by your team's visibility settings, and a deleted one all answer 404. Rate limit: this endpoint has a tighter cap of 10 requests/minute and 100/day, applied inside the shared campaigns bucket of 30 requests/minute and 1,000/day per token owner (shared by every campaign, scheduled-send, campaign-template and knowledge-hub endpoint).

Errors:
- `404` `CAMPAIGN_NOT_FOUND` — No campaign with this id exists, it belongs to another account (including a campaign delegated to you or shared by your team's visibility settings), or it has been deleted.
- `422` `VALIDATION_FAILED` — campaignId is not a 24-character hex id.
- `429` `RATE_LIMITED` — Either this endpoint's own cap (10 requests/minute, 100/day) or the shared campaigns bucket (30/minute, 1,000/day for this token owner, shared by every /business/campaigns, /business/scheduled-sends, /business/campaign-templates and /business/knowledge-hubs call) was exceeded. The RateLimit-* headers on the response describe the shared bucket, so a refusal from this endpoint's own cap can still report requests remaining and carries no Retry-After.
- `500` `UNEXPECTED_ERROR` — Topic generation failed; the detail stays in our logs.

Requires one of the following token scopes: campaigns.

## Path parameters

- `campaignId` string, required: The campaign's id (24-character hex ObjectId), as returned by POST /business/campaigns or as the campaignId of a GET /business/campaigns row.

## Response `200`

Success

- object
  - `totalStepCount` integer, required: Sequence steps the campaign has.
  - `regeneratedStepCount` integer, required: How many of them got a new topic; 0 when the campaign has no AI steps.

## Other responses

- `400`: Error
- `401`: Error
- `402`: Error
- `403`: Error
- `404`: Error
- `409`: Error
- `422`: Error
- `429`: Error
- `500`: Error

---

[API](https://skmtc.dev/fuseai/apis/fuse-business-api.md) · [All operations](https://skmtc.dev/fuseai/apis/fuse-business-api/llms.txt) · [OpenAPI document](https://skmtc.dev/fuseai/apis/fuse-business-api/revisions/50d95e0536f4?raw)