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

# Update budget

> Partial update — scope and window are immutable after create. Use explicit null to clear timezone / description.



## OpenAPI

````yaml PATCH /api/gateway/v1/budgets/{id}
openapi: 3.1.0
info:
  title: LangWatch API
  version: 1.0.0
  description: LangWatch openapi spec
servers:
  - url: https://app.langwatch.ai
security:
  - project_api_key: []
paths:
  /api/gateway/v1/budgets/{id}:
    patch:
      tags:
        - Budgets
      summary: Update budget
      description: >-
        Partial update — scope and window are immutable after create. Use
        explicit null to clear timezone / description.
      operationId: patchApiGatewayV1BudgetsById
      parameters:
        - schema:
            type: string
          in: path
          name: id
          required: true
      responses:
        '200':
          description: Updated
          content:
            application/json:
              schema:
                type: object
                properties:
                  budget:
                    type: object
                    properties:
                      id:
                        type: string
                      organization_id:
                        type: string
                      scope_type:
                        type: string
                      scope_id:
                        type: string
                      name:
                        type: string
                      description:
                        type:
                          - string
                          - 'null'
                      window:
                        type: string
                      on_breach:
                        type: string
                        enum:
                          - BLOCK
                          - WARN
                      limit_usd:
                        type: string
                      spent_usd:
                        type: string
                      resets_at:
                        type: string
                      archived_at:
                        type:
                          - string
                          - 'null'
                    required:
                      - id
                      - organization_id
                      - scope_type
                      - scope_id
                      - name
                      - description
                      - window
                      - on_breach
                      - limit_usd
                      - spent_usd
                      - resets_at
                      - archived_at
                required:
                  - budget
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                  message:
                    type: string
                required:
                  - error
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                  message:
                    type: string
                required:
                  - error
        '422':
          description: Unprocessable Entity
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                  message:
                    type: string
                required:
                  - error
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                  message:
                    type: string
                required:
                  - error
components:
  securitySchemes:
    project_api_key:
      type: apiKey
      in: header
      name: X-Auth-Token
      description: >-
        Project API key for sending traces and accessing project-scoped
        resources. Format: sk-lw-... (no underscore). Obtain one by creating a
        project via the Admin API or the LangWatch UI.

````