---
title: "Add Companies To Multiple Lists"
method: POST
path: "/v0/company_lists/add_companies"
tags: ["Company Lists"]
---

# Add Companies To Multiple Lists

`POST /v0/company_lists/add_companies`

## Request

- Base URL: `https://api.theirstack.com`
- URL: `https://api.theirstack.com/v0/company_lists/add_companies`
- Auth: HTTP bearer

Add the same companies to several of the team's company lists in one call, by their company IDs, the `id` of each company in a company search result. Nothing is added if any list ID isn't one of the team's lists.

## Request body

- BodyPostCompanyListsAddCompaniesMultipleV0
  - `list_ids` integer[]: IDs of the company lists to add the companies to
  - `company_ids` string[]: Company IDs to add, the `id` of each company in a company search result

## Response `200`

Successful Response

- unknown

## Other responses

- `400`: Bad Request
- `402`: Payment Required
- `422`: Unprocessable Content
- `500`: Internal Server Error

## Changes

- **2026-01-14** `ecd1eb029865`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/theirstack/apis/theirstack-api-reference/changes/v0/company_lists/add_companies/post.md)

---

[API](https://skmtc.dev/theirstack/apis/theirstack-api-reference.md) - [All operations](https://skmtc.dev/theirstack/apis/theirstack-api-reference/llms.txt) - [OpenAPI document](https://skmtc.dev/theirstack/apis/theirstack-api-reference/revisions/4f3da5ce4026?raw)