> ## 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. > ## Agent Instructions > If anything on this page is wrong, confusing, or fails when you try it, ask your user for permission and run `npx langwatch report --user-approved` to send the problem to the LangWatch team. No login is needed and secrets are redacted locally. `npx langwatch report --help` has the details. # Update budget > Partial update. Scope, window and cycle_anchor_at are immutable after create. Answers with the budget's live spend, the same figure `GET /budgets` reports. Requires gatewayBudgets:update at the organization. ## OpenAPI ````yaml PATCH /api/gateway/v1/budgets/{id} openapi: 3.1.0 info: title: LangWatch API description: LangWatch openapi spec version: 1.0.0 servers: - url: https://app.langwatch.ai security: - project_api_key: [] paths: /api/gateway/v1/budgets/{id}: patch: summary: Update budget description: >- Partial update. Scope, window and cycle_anchor_at are immutable after create. Answers with the budget's live spend, the same figure `GET /budgets` reports. Requires gatewayBudgets:update at the organization. operationId: patchApiGatewayV1BudgetsById parameters: - in: path name: id schema: type: string minLength: 1 required: true requestBody: required: false content: application/json: schema: type: object properties: name: type: string minLength: 1 maxLength: 128 description: type: - string - 'null' limit_usd: anyOf: - type: number exclusiveMinimum: 0 - type: string pattern: ^\d+(\.\d+)?$ on_breach: type: string enum: - block - warn timezone: type: - string - 'null' external_id: anyOf: - type: string minLength: 1 maxLength: 128 - type: 'null' metadata: type: object propertyNames: type: string minLength: 1 maxLength: 64 additionalProperties: type: string maxLength: 500 responses: '200': description: Success content: application/json: schema: type: object properties: budget: type: object properties: id: type: string organization_id: type: string scope_type: type: string enum: - organization - team - project - virtual_key - principal - group - attributed_user scope_id: type: string name: type: string description: type: - string - 'null' window: type: string enum: - minute - hour - day - week - month - total - manual on_breach: type: string enum: - block - warn limit_usd: type: string description: >- Display value. Decimal string, up to 9 fractional digits, trailing zeros trimmed, never exponent notation. Use limit_nano_usd for arithmetic. limit_nano_usd: anyOf: - type: integer minimum: -9007199254740991 maximum: 9007199254740991 - type: 'null' spent_usd: type: - string - 'null' spent_nano_usd: anyOf: - type: integer minimum: -9007199254740991 maximum: 9007199254740991 - type: 'null' timezone: type: - string - 'null' provider_key: type: - string - 'null' external_id: type: - string - 'null' metadata: type: object propertyNames: type: string additionalProperties: type: string current_period_started_at: type: string resets_at: type: string cycle_anchor_at: type: - string - 'null' last_reset_at: type: - string - 'null' archived_at: type: - string - 'null' created_at: type: string member_count: type: integer minimum: -9007199254740991 maximum: 9007199254740991 end_users_seen: type: integer minimum: -9007199254740991 maximum: 9007199254740991 end_users_over: type: integer minimum: -9007199254740991 maximum: 9007199254740991 scope_reach: type: string enum: - reachable - unreachable required: - id - organization_id - scope_type - scope_id - name - description - window - on_breach - limit_usd - limit_nano_usd - spent_usd - spent_nano_usd - timezone - provider_key - external_id - metadata - current_period_started_at - resets_at - cycle_anchor_at - last_reset_at - archived_at - created_at additionalProperties: false required: - budget additionalProperties: false '400': description: Bad Request content: application/json: schema: type: object properties: type: type: string code: type: string message: type: string retryable: type: boolean meta: type: object propertyNames: type: string additionalProperties: {} trace_id: type: string span_id: type: string trace: type: object properties: traceId: type: string spanId: type: string traceUrl: type: string logsUrl: type: string tips: type: array items: type: string docs_url: type: string fault: type: string enum: - customer - platform - provider - presumed_platform reasons: type: array items: {} required: - type - code - message - retryable '401': description: Unauthorized content: application/json: schema: type: object properties: type: type: string code: type: string message: type: string retryable: type: boolean meta: type: object propertyNames: type: string additionalProperties: {} trace_id: type: string span_id: type: string trace: type: object properties: traceId: type: string spanId: type: string traceUrl: type: string logsUrl: type: string tips: type: array items: type: string docs_url: type: string fault: type: string enum: - customer - platform - provider - presumed_platform reasons: type: array items: {} required: - type - code - message - retryable '403': description: Forbidden content: application/json: schema: type: object properties: type: type: string code: type: string message: type: string retryable: type: boolean meta: type: object propertyNames: type: string additionalProperties: {} trace_id: type: string span_id: type: string trace: type: object properties: traceId: type: string spanId: type: string traceUrl: type: string logsUrl: type: string tips: type: array items: type: string docs_url: type: string fault: type: string enum: - customer - platform - provider - presumed_platform reasons: type: array items: {} required: - type - code - message - retryable '500': description: Internal Server Error content: application/json: schema: type: object properties: type: type: string code: type: string message: type: string retryable: type: boolean meta: type: object propertyNames: type: string additionalProperties: {} trace_id: type: string span_id: type: string trace: type: object properties: traceId: type: string spanId: type: string traceUrl: type: string logsUrl: type: string tips: type: array items: type: string docs_url: type: string fault: type: string enum: - customer - platform - provider - presumed_platform reasons: type: array items: {} required: - type - code - message - retryable security: - project_api_key: [] 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. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.