---
title: "Bulk-start Backfill for companies"
method: POST
path: "/backfill/companies/bulk-start"
tags: ["Backfill"]
---

# Bulk-start Backfill for companies

`POST /backfill/companies/bulk-start`

## Request

- Base URL: `https://api.cavuno.com/v1`
- URL: `https://api.cavuno.com/v1/backfill/companies/bulk-start`
- Auth: HTTP bearer

Start backfill for up to 100 Cavuno company IDs. Preserves order and returns per-item success or product error without provider detail (a not-Backfillable company reports `company_not_backfillable`). Requires an `Idempotency-Key` header.

## Request body

- BulkBackfillCompaniesBody
  - `companyIds` string[], required: Ordered Cavuno company IDs (max 100). Partial success is returned per item.

## Response `200`

Ordered per-item results.

- BackfillBulkResult
  - `object` 'backfill_bulk_result', required
  - `data` BackfillBulkItemResult[], required
    - `companyId` string, required
    - `status` 'ok' | 'error', required
    - `error` object
      - `code` string, required
      - `message` string, required

## Other responses

- `default`: An error. Every non-2xx response uses the same envelope; see the Errors section of the introduction.

## Changes

- **2026-10-19** `c34152c38176`: 1 info
  - added the optional property `error/upgrade` to the response with the `default` status

[Operation history](https://skmtc.dev/cavuno/apis/cavuno-v1-rest-api/changes/backfill/companies/bulk-start/post.md)

---

[API](https://skmtc.dev/cavuno/apis/cavuno-v1-rest-api.md) · [All operations](https://skmtc.dev/cavuno/apis/cavuno-v1-rest-api/llms.txt) · [OpenAPI document](https://skmtc.dev/cavuno/apis/cavuno-v1-rest-api/revisions/d5974dabff14?raw)