> ## Documentation Index
> Fetch the complete documentation index at: https://docs.adstellar.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Change a Meta campaign's daily budget. For a CBO / Advantage+ campaign this sets the shared campaign budget; for an ABO campaign it sets EVERY ad set to that amount (use update_ad_set_budget to change one ad set). Amount is in the ad account's currency. Two-step with confirmationToken.

> Change a Meta campaign's daily budget. For a CBO / Advantage+ campaign this sets the shared campaign budget; for an ABO campaign it sets EVERY ad set to that amount (use update_ad_set_budget to change one ad set). Amount is in the ad account's currency. Two-step with confirmationToken.



## OpenAPI

````yaml /openapi.json post /tools/update_campaign_budget
openapi: 3.1.0
info:
  title: AdStellar API
  version: 1.0.0
  description: >-
    Public REST API for AdStellar — creative generation, video generation,
    campaign management, and analytics. Every endpoint maps 1:1 to an AdStellar
    MCP tool.
servers:
  - url: https://app.adstellar.ai/api/v1
security: []
paths:
  /tools/update_campaign_budget:
    post:
      summary: >-
        Change a Meta campaign's daily budget. For a CBO / Advantage+ campaign
        this sets the shared campaign budget; for an ABO campaign it sets EVERY
        ad set to that amount (use update_ad_set_budget to change one ad set).
        Amount is in the ad account's currency. Two-step with confirmationToken.
      description: >-
        Change a Meta campaign's daily budget. For a CBO / Advantage+ campaign
        this sets the shared campaign budget; for an ABO campaign it sets EVERY
        ad set to that amount (use update_ad_set_budget to change one ad set).
        Amount is in the ad account's currency. Two-step with confirmationToken.
      operationId: update_campaign_budget
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $schema: https://json-schema.org/draft/2020-12/schema
              type: object
              properties:
                campaignId:
                  type: string
                  minLength: 1
                  description: Meta campaign id from lookup_campaign.
                campaignName:
                  description: Display name of the campaign, for the confirmation preview.
                  type: string
                  maxLength: 200
                workspaceId:
                  description: >-
                    Limit to one workspace this credential can access. Omit to
                    span all of them.
                  type: string
                  format: uuid
                  pattern: >-
                    ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                confirmationToken:
                  description: >-
                    Omit on the first call to get a preview + token; pass the
                    token back to execute.
                  type: string
                dailyBudget:
                  type: number
                  minimum: 1
                  maximum: 100000
                  description: >-
                    New daily budget in the ad account's currency (major units,
                    e.g. 50 = $50/day).
              required:
                - campaignId
                - dailyBudget
              additionalProperties: false
      responses:
        '200':
          description: Tool result
        '401':
          description: Missing or invalid API key
        '403':
          description: Missing required scope
        '429':
          description: Rate limit exceeded
      security:
        - bearerAuth: []
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: AdStellar API key (ast_live_...)

````

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