Teamleader

Teamleader Tasks API

The Tasks API from Teamleader — 8 operation(s) for tasks.

GitHub OpenAPI

Operations 8

POST /tasks.complete Mark a task as complete #
POST /tasks.create Create a new task #
POST /tasks.delete Delete a task #
POST /tasks.info Get information about a task #
POST /tasks.list Get a list of tasks #
POST /tasks.reopen Reopen a task that had been marked as complete #
POST /tasks.schedule Schedule a task in your calendar #
POST /tasks.update Update a task #

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/teamleader/refs/heads/main/openapi/teamleader-tasks-api-openapi.yml

Schemas & Data

📊
JSONSchema
https://raw.githubusercontent.com/api-evangelist/teamleader/refs/heads/main/json-schema/teamleader-post-invoices-draft-request-schema.json
📊
JSONSchema
https://raw.githubusercontent.com/api-evangelist/teamleader/refs/heads/main/json-schema/teamleader-post-tickets-create-request-schema.json
📊
JSONSchema
https://raw.githubusercontent.com/api-evangelist/teamleader/refs/heads/main/json-schema/teamleader-post-invoices-update-request-schema.json
📊
JSONSchema
https://raw.githubusercontent.com/api-evangelist/teamleader/refs/heads/main/json-schema/teamleader-post-deals-create-request-schema.json
📊
JSONSchema
https://raw.githubusercontent.com/api-evangelist/teamleader/refs/heads/main/json-schema/teamleader-post-contacts-add-request-schema.json
📊
JSONSchema
https://raw.githubusercontent.com/api-evangelist/teamleader/refs/heads/main/json-schema/teamleader-post-tasks-create-request-schema.json

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/teamleader-tasks-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

teamleader-tasks-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Teamleader Tasks API
  version: '2026-09-22'
  description: 'GENERATED FROM DOCUMENTATION by API Evangelist on 2026-09-22: 58 operation(s) read from 60 public documentation page(s) (each operation names its page in x-source). This is not the provider''s published contract; Teamleader has published no machine-readable contract that the pipeline could find. Engine: anthropic.'
  x-generated-from: documentation
  x-provenance: generated
  x-authored-by: API Evangelist
  x-generated: '2026-09-22'
  x-generator: generate-contract-from-docs.py
  x-engine: anthropic
  x-sources:
  - https://developer.focus.teamleader.eu/docs/authentication
  - https://developer.focus.teamleader.eu/docs/general-principles
  - https://developer.focus.teamleader.eu/docs/api/deals-list
  - https://developer.focus.teamleader.eu/docs/api/deals-info
  - https://developer.focus.teamleader.eu/docs/api/deals-create
  - https://developer.focus.teamleader.eu/docs/api/deals-update
  - https://developer.focus.teamleader.eu/docs/api/deals-move
  - https://developer.focus.teamleader.eu/docs/api/deals-win
  - https://developer.focus.teamleader.eu/docs/api/deals-lose
  - https://developer.focus.teamleader.eu/docs/api/deals-delete
  - https://developer.focus.teamleader.eu/docs/api/lost-reasons-list
  - https://developer.focus.teamleader.eu/docs/api/level-two-areas-list
  - https://developer.focus.teamleader.eu/docs/api/files-list
  - https://developer.focus.teamleader.eu/docs/api/files-info
  - https://developer.focus.teamleader.eu/docs/api/files-download
  - https://developer.focus.teamleader.eu/docs/api/files-upload
  - https://developer.focus.teamleader.eu/docs/api/files-delete
  - https://developer.focus.teamleader.eu/docs/api/ticket-status-list
  - https://developer.focus.teamleader.eu/docs/api/tasks-list
  - https://developer.focus.teamleader.eu/docs/api/tasks-info
  - https://developer.focus.teamleader.eu/docs/api/tasks-create
  - https://developer.focus.teamleader.eu/docs/api/tasks-update
  - https://developer.focus.teamleader.eu/docs/api/tasks-complete
  - https://developer.focus.teamleader.eu/docs/api/tasks-reopen
  - https://developer.focus.teamleader.eu/docs/api/tasks-delete
  - https://developer.focus.teamleader.eu/docs/api/tasks-schedule
  - https://developer.focus.teamleader.eu/docs/api/user-availability-daily
  - https://developer.focus.teamleader.eu/docs/api/tickets-list
  - https://developer.focus.teamleader.eu/docs/api/tickets-info
  - https://developer.focus.teamleader.eu/docs/api/tickets-create
  - https://developer.focus.teamleader.eu/docs/api/tickets-update
  - https://developer.focus.teamleader.eu/docs/api/tickets-list-messages
  - https://developer.focus.teamleader.eu/docs/api/tickets-get-message
  - https://developer.focus.teamleader.eu/docs/api/tickets-import-message
  - https://developer.focus.teamleader.eu/docs/api/tickets-add-reply
  - https://developer.focus.teamleader.eu/docs/api/tickets-add-internal-message
  - https://developer.focus.teamleader.eu/docs/api/timers-update
  - https://developer.focus.teamleader.eu/docs/api/contacts-list
  - https://developer.focus.teamleader.eu/docs/api/contacts-info
  - https://developer.focus.teamleader.eu/docs/api/contacts-add
  - https://developer.focus.teamleader.eu/docs/api/contacts-update
  - https://developer.focus.teamleader.eu/docs/api/contacts-delete
  - https://developer.focus.teamleader.eu/docs/api/contacts-tag
  - https://developer.focus.teamleader.eu/docs/api/contacts-untag
  - https://developer.focus.teamleader.eu/docs/api/contacts-link-to-company
  - https://developer.focus.teamleader.eu/docs/api/contacts-unlink-from-company
  - https://developer.focus.teamleader.eu/docs/api/contacts-update-company-link
  - https://developer.focus.teamleader.eu/docs/api/contacts-upload-avatar
  - https://developer.focus.teamleader.eu/docs/api/days-off-bulk-delete
  - https://developer.focus.teamleader.eu/docs/api/expenses-list
  - https://developer.focus.teamleader.eu/docs/api/payment-methods-list
  - https://developer.focus.teamleader.eu/docs/api/invoices-list
  - https://developer.focus.teamleader.eu/docs/api/invoices-info
  - https://developer.focus.teamleader.eu/docs/api/invoices-download
  - https://developer.focus.teamleader.eu/docs/api/invoices-draft
  - https://developer.focus.teamleader.eu/docs/api/invoices-update
  - https://developer.focus.teamleader.eu/docs/api/invoices-update-booked
  - https://developer.focus.teamleader.eu/docs/api/invoices-copy
  - https://developer.focus.teamleader.eu/docs/api/invoices-book
  - https://developer.focus.teamleader.eu/docs/api/invoices-delete
servers:
- url: https://api.focus.teamleader.eu
security:
- bearer: []
tags:
- name: Tasks
paths:
  /tasks.complete:
    post:
      operationId: post_tasks_complete
      tags:
      - Tasks
      summary: Mark a task as complete
      x-source: https://developer.focus.teamleader.eu/docs/api/tasks-complete
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PostTasksCompleteRequest'
      responses:
        '204':
          description: Success (status as documented)
  /tasks.create:
    post:
      operationId: post_tasks_create
      tags:
      - Tasks
      summary: Create a new task
      x-source: https://developer.focus.teamleader.eu/docs/api/tasks-create
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PostTasksCreateRequest'
      responses:
        '201':
          description: Success (status as documented)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PostTasksCreateResponse'
  /tasks.delete:
    post:
      operationId: post_tasks_delete
      tags:
      - Tasks
      summary: Delete a task
      x-source: https://developer.focus.teamleader.eu/docs/api/tasks-delete
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PostTasksDeleteRequest'
      responses:
        '204':
          description: Success (status as documented)
  /tasks.info:
    post:
      operationId: post_tasks_info
      tags:
      - Tasks
      summary: Get information about a task
      x-source: https://developer.focus.teamleader.eu/docs/api/tasks-info
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PostTasksInfoRequest'
      responses:
        '200':
          description: Success (status as documented)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PostTasksInfoResponse'
  /tasks.list:
    post:
      operationId: post_tasks_list
      tags:
      - Tasks
      summary: Get a list of tasks
      x-source: https://developer.focus.teamleader.eu/docs/api/tasks-list
      requestBody:
        required: false
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PostTasksListRequest'
      responses:
        '200':
          description: Success (status as documented)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PostTasksListResponse'
  /tasks.reopen:
    post:
      operationId: post_tasks_reopen
      tags:
      - Tasks
      summary: Reopen a task that had been marked as complete
      x-source: https://developer.focus.teamleader.eu/docs/api/tasks-reopen
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PostTasksReopenRequest'
      responses:
        '204':
          description: Success (status as documented)
  /tasks.schedule:
    post:
      operationId: post_tasks_schedule
      tags:
      - Tasks
      summary: Schedule a task in your calendar
      x-source: https://developer.focus.teamleader.eu/docs/api/tasks-schedule
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PostTasksScheduleRequest'
      responses:
        '201':
          description: Success (status as documented)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PostTasksScheduleResponse'
  /tasks.update:
    post:
      operationId: post_tasks_update
      tags:
      - Tasks
      summary: Update a task
      x-source: https://developer.focus.teamleader.eu/docs/api/tasks-update
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PostTasksUpdateRequest'
      responses:
        '204':
          description: Success (status as documented)
components:
  schemas:
    PostTasksScheduleResponse:
      type: object
      properties:
        data:
          type: object
    PostTasksScheduleRequest:
      type: object
      properties:
        id:
          type: string
        starts_at:
          type: string
        ends_at:
          type: string
      required:
      - id
      - starts_at
      - ends_at
    PostTasksReopenRequest:
      type: object
      properties:
        id:
          type: string
      required:
      - id
    PostTasksCreateResponse:
      type: object
      properties:
        data:
          type: object
    PostTasksDeleteRequest:
      type: object
      properties:
        id:
          type: string
      required:
      - id
    PostTasksInfoRequest:
      type: object
      properties:
        id:
          type: string
      required:
      - id
    PostTasksCompleteRequest:
      type: object
      properties:
        id:
          type: string
      required:
      - id
    PostTasksListRequest:
      type: object
      properties:
        filter:
          type: object
        page:
          type: object
        sort:
          type: object
    PostTasksCreateRequest:
      type: object
      properties:
        title:
          type: string
        description:
          type: string
        due_on:
          type: string
        work_type_id:
          type: string
        milestone_id:
          type: string
          description: Only available for users that have access to the old projects module
        project_id:
          type: string
          description: Only available for users that have access to the new projects module
        deal_id:
          type: string
        ticket_id:
          type: string
        estimated_duration:
          type: object
        assignee:
          type: object
        customer:
          type: object
        custom_fields:
          type: object
      required:
      - title
      - description
      - work_type_id
    PostTasksInfoResponse:
      type: object
      properties:
        data:
          type: object
    PostTasksListResponse:
      type: object
      properties:
        data:
          type: object
    PostTasksUpdateRequest:
      type: object
      properties:
        id:
          type: string
        title:
          type: string
        description:
          type: string
        due_on:
          type: string
        work_type_id:
          type: string
        milestone_id:
          type: string
        project_id:
          type: string
        deal_id:
          type: string
        ticket_id:
          type: string
        estimated_duration:
          type: object
        assignee:
          type: object
        customer:
          type: object
        custom_fields:
          type: object
      required:
      - id
  securitySchemes:
    bearer:
      type: http
      scheme: bearer