> ## Documentation Index > Fetch the complete documentation index at: https://docs.doers.sh/llms.txt > Use this file to discover all available pages before exploring further. # Create a heading (or a milestone) > Creates a grouping of tasks under a project **or** under an area — never both. Provide `deadline` to make it a dated **milestone**; leave it out for a plain grouping. The heading is appended last. File tasks into it afterwards with `update_tasks` and its `headingId` field: one call for a whole batch. ## OpenAPI ````yaml https://api.doers.sh/openapi.json post /v2/headings openapi: 3.1.0 info: title: Doers API version: 2.0.0 description: >- The open API of Doers: tasks, projects, areas, prioritised context and the day's plan. ## Authentication Every route requires a bearer token, generated from **Settings > API & MCP** in the app: ``` Authorization: Bearer pc_… ``` ## Two date fields, not to be confused - `when` — the **schedule**: `today`, `anytime` (Later), `someday` (Future) or a date. - `deadline` — the **commitment**, independent of the schedule. ## Time zone The server reasons in UTC and does not know yours. Send the `X-PC-Today: YYYY-MM-DD` header (or the `day` argument where it exists) so dated operations use your local day. ## MCP server The same token gives access to the [Model Context Protocol](https://modelcontextprotocol.io) server at `POST https://doers.sh/mcp`, which exposes the same operations as tools for Claude, Cursor and other compatible clients. servers: - url: https://api.doers.sh description: Production. security: - bearerAuth: [] tags: - name: Tasks - name: Projects - name: Areas - name: Headings - name: Comments - name: Realtime - name: Devices - name: Context - name: Plan - name: Sessions - name: Rounds - name: Journal - name: Habits - name: Stats - name: Users - name: Profiles - name: Workspaces - name: Access - name: Activity - name: Tokens - name: Referrals - name: Files - name: Connections - name: Collaborators - name: Links - name: Packages - name: Installs - name: Billing - name: Calendar - name: Coach - name: Marketplace paths: /v2/headings: post: tags: - Headings summary: Create a heading (or a milestone) description: >- Creates a grouping of tasks under a project **or** under an area — never both. Provide `deadline` to make it a dated **milestone**; leave it out for a plain grouping. The heading is appended last. File tasks into it afterwards with `update_tasks` and its `headingId` field: one call for a whole batch. operationId: createHeading requestBody: required: false content: application/json: schema: type: object properties: areaId: anyOf: - 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)$ description: Identifier of a row. - type: 'null' deadline: description: Milestone due date. Absent means a plain grouping. anyOf: - type: string format: date pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))$ description: Local day key, `YYYY-MM-DD`. - type: 'null' name: type: string default: '' maxLength: 200 notes: anyOf: - type: string description: >- Markdown: bold, italic, headings, lists, quotes, rules, links, inline code, tables and checkboxes. **Do not use code blocks (```) or images**: the app's editor does not support them and truncates the display from that point on. maxLength: 10000 - type: 'null' projectId: anyOf: - 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)$ description: Identifier of a row. - type: 'null' additionalProperties: false responses: '201': description: Created. content: application/json: schema: type: object properties: heading: type: object properties: id: type: string name: type: string projectId: anyOf: - type: string - type: 'null' areaId: anyOf: - type: string - type: 'null' deadline: anyOf: - type: string - type: 'null' description: >- Milestone due date `YYYY-MM-DD`, or `null` for a plain grouping. notes: type: string order: type: number description: >- Manual position. Fractional values are valid; lower sorts first. openTaskCount: type: integer minimum: -9007199254740991 maximum: 9007199254740991 doneTaskCount: type: integer minimum: -9007199254740991 maximum: 9007199254740991 required: - id - name - projectId - areaId - deadline - notes - order - openTaskCount - doneTaskCount additionalProperties: false required: - heading additionalProperties: false '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '404': $ref: '#/components/responses/NotFound' '422': $ref: '#/components/responses/Unprocessable' '429': $ref: '#/components/responses/TooManyRequests' components: responses: BadRequest: content: application/json: schema: $ref: '#/components/schemas/Error' description: >- Invalid request — unreadable body, out-of-range field or unknown parameter. Unauthorized: content: application/json: schema: $ref: '#/components/schemas/Error' description: Token missing, unknown or revoked. NotFound: content: application/json: schema: $ref: '#/components/schemas/Error' description: >- Resource does not exist **or** belongs to another account — the API never distinguishes the two. Unprocessable: content: application/json: schema: $ref: '#/components/schemas/Error' description: >- Well-formed but unusable request — an empty title once parsed, for instance. TooManyRequests: content: application/json: schema: $ref: '#/components/schemas/Error' description: Too many requests. `Retry-After` says how many seconds to wait. schemas: Error: type: object properties: error: type: object properties: code: type: string description: Stable machine-readable code. message: type: string description: Human-readable message. details: type: array description: Per-field detail, present on validation errors. items: type: object properties: field: type: string message: type: string required: - field - message required: - code - message required: - error securitySchemes: bearerAuth: type: http scheme: bearer description: A `pc_…` token generated from Settings > API & MCP. ````