> ## Documentation Index > Fetch the complete documentation index at: https://docs.aioncx.com/llms.txt > Use this file to discover all available pages before exploring further. # Revise the group activity calendar > Versioned native calendar authoring with effective ranges, recurrence and exceptions, target people or assignments, reason, expected revision and exact-body request key. Does not publish or alter dated schedules. ## OpenAPI ````yaml /api-reference/workforce/openapi.json post /api/v1/workforce/scheduling-groups/{groupId}/calendar openapi: 3.1.0 info: title: Atlas workforce API version: 2026-10-preview description: >- Authenticated workforce staffing-to-draft operations. Released together with matching MCP operations. Deploy the reviewed native guard migrations before enabling this feature. servers: - url: / security: - AtlasIntegrationBearer: [] paths: /api/v1/workforce/scheduling-groups/{groupId}/calendar: post: summary: Revise the group activity calendar description: >- Versioned native calendar authoring with effective ranges, recurrence and exceptions, target people or assignments, reason, expected revision and exact-body request key. Does not publish or alter dated schedules. operationId: save_group_activity_calendar parameters: - name: X-Workspace-Id in: header required: true schema: type: string format: uuid description: >- Selector within saved grants and current issuer authority; never grants authority. - name: groupId in: path required: true schema: type: string format: uuid - name: Idempotency-Key in: header required: true schema: type: string format: uuid description: >- Retain this exact operation key and body. Inspect uncertain outcomes before retrying. requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/WorkforceGroupCalendar' responses: '200': description: Native typed result. content: application/json: schema: $ref: '#/components/schemas/WorkforcePlanningResult' '400': description: Missing or malformed transport fields content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: Missing, invalid or expired bearer content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: Saved grant or current authority denied content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: Scoped resource not found content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: Stale source/revision or conflicting request content: application/json: schema: $ref: '#/components/schemas/Error' '413': description: Body exceeds 64 KiB content: application/json: schema: $ref: '#/components/schemas/Error' '415': description: Content-Type must be application/json content: application/json: schema: $ref: '#/components/schemas/Error' '422': description: Invalid or unsupported input content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: Concurrent compute limit; retry after 5 seconds content: application/json: schema: $ref: '#/components/schemas/Error' '503': description: Required evidence or service unavailable content: application/json: schema: $ref: '#/components/schemas/Error' components: schemas: WorkforceGroupCalendar: type: object properties: expected_revision: type: integer minimum: 0 maximum: 9007199254740991 entries: maxItems: 200 type: array items: type: object properties: id: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$ name: type: string minLength: 1 maxLength: 120 activityTypeSlug: type: string pattern: ^[a-z0-9][a-z0-9_]{0,99}$ startTime: type: string durationMinutes: type: integer minimum: 5 maximum: 720 validFrom: type: string validTo: default: null anyOf: - type: string - type: 'null' recurrence: oneOf: - type: object properties: kind: type: string const: once required: - kind additionalProperties: false - type: object properties: kind: type: string const: weekly days: minItems: 1 maxItems: 7 type: array items: type: string enum: - sun - mon - tue - wed - thu - fri - sat required: - kind - days additionalProperties: false - type: object properties: kind: type: string const: every_n_weeks everyWeeks: type: integer minimum: 2 maximum: 52 anchorWeekStart: type: string days: minItems: 1 maxItems: 7 type: array items: type: string enum: - sun - mon - tue - wed - thu - fri - sat required: - kind - everyWeeks - anchorWeekStart - days additionalProperties: false excludedDates: default: [] maxItems: 200 type: array items: type: string target: oneOf: - type: object properties: kind: type: string const: group required: - kind additionalProperties: false - type: object properties: kind: type: string const: people ids: minItems: 1 maxItems: 200 type: array items: 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)$ required: - kind - ids additionalProperties: false - type: object properties: kind: type: string const: assignments ids: minItems: 1 maxItems: 200 type: array items: 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)$ required: - kind - ids additionalProperties: false movement: default: protected type: string const: protected required: - id - name - activityTypeSlug - startTime - durationMinutes - validFrom - recurrence - target additionalProperties: false reason: type: string minLength: 1 maxLength: 2000 required: - expected_revision - entries - reason additionalProperties: false WorkforcePlanningResult: type: object description: >- Native typed outcome. Depending on the operation: records and effective revisions, `issues` with code, field path, severity and source references, applied constraints, soft preference effects, affected drafts and future published commitments with `complete`, missing or unsupported evidence, `replayed` for an exact retry and verified effect references. Authored availability, preference and pattern bodies round-trip unchanged. additionalProperties: true Error: type: object properties: error: type: object properties: code: type: string message: type: string details: {} required: - code - message additionalProperties: false required: - error additionalProperties: false securitySchemes: AtlasIntegrationBearer: type: http scheme: bearer bearerFormat: atlas_mcp_ description: >- Existing Atlas integration connection with explicit api:connect plus appropriate native domain grants. atlas_ingest_ and browser cookies are not accepted. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.