---
title: "Changes to Create and activate a campaign against a lead list."
method: POST
path: "/campaigns"
---

# Changes to Create and activate a campaign against a lead list.

`POST /campaigns`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 2 revisions.

- **2026-10-19** `242a462d82c4`: 1 warning, 2 info

## Changes

- **2026-10-19** `242a462d82c4`: 1 warning, 2 info
  - added the new `large_order_payment_pending` enum value to the `nextSteps/steps/items/reason` response property for the response status `201`
  - added the optional property `nextSteps/steps/items/effect/oneOf[#/components/schemas/MailboxBilling]/domainEnding` to the response with the `201` status
  - added the optional property `nextSteps/steps/items/effect/oneOf[#/components/schemas/MailboxBilling]/prepay` to the response with the `201` status

---

[Operation](https://skmtc.dev/coldrig/apis/agent-cold-email-api/docs/campaigns/post.md) · [API](https://skmtc.dev/coldrig/apis/agent-cold-email-api.md) · [Page](https://skmtc.dev/coldrig/apis/agent-cold-email-api/changes/campaigns/post)