---
search:
  tags:
    - Campaigns
    - PATCH
seo:
  description: >-
    Available on: Meta. Reference for the PATCH
    /mutations/{advertiserId}/campaigns/{id}/bidding endpoint in the AdCrunch
    API.
sidebar:
  label: Update a campaign’s bidding
  badge: PATCH
title: Update a campaign’s bidding
type: openapi-operation
---
**Available on:** [![Meta](/providers/meta.svg)](https://docs.adcrunch.dev/connect/providers)

Changes the bidding of a campaign. The path names the campaign, and the body holds only the change.

It starts a Mutation of the kind `meta_update_bidding`, the same change that `POST /mutations` starts with that kind. The MCP tool of the same name makes the same change.

The change does **not** happen during this request. The answer is `202`, and `Location` names the Mutation. Poll `GET /mutations/{id}` until it reports `complete` or `errored`. A Mutation is durable, so the id stays valid across retries and restarts.

A refused request starts nothing. AdCrunch refuses a body that does not match, an advertiser that is not yours, an advertiser with no usable connection, and an advertiser connected without write access before a Mutation exists. So a failed call leaves no row in the history.

**This operation checks the credential first and the body second.** A missing or unusable credential answers `401` even when the body is wrong as well.

`PATCH /mutations/{advertiserId}/campaigns/{id}/bidding`