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Todoist Sync API

Incremental sync operations

Todoist Sync API is one of 11 APIs that Todoist publishes on the APIs.io network, described by a machine-readable OpenAPI specification and an AsyncAPI event-driven specification.

This API exposes 1 JSON Schema definition.

Tagged areas include Sync. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an AsyncAPI specification, and 1 JSON Schema.

This API exposes 1 operation across 1 path, and defines 4 schemas. It is described by OpenAPI 3.2.0, at version 1.0.

Requests are made against a single base URL, https://api.todoist.com/api/v1.

1 operations 1 paths 4 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0
Base URL
https://api.todoist.com/api/v1
Authentication
HTTP Bearer
Terms of Service
Resource Areas
1

Authentication & Security 1

Todoist Sync API declares 1 security scheme for authenticating requests. It accepts HTTP bearer tokens (bearerAuth). By default, every request must be authenticated.

  • bearerAuth — Personal API token or OAuth 2.0 access token

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.

Sync 1

Incremental sync operations

POST
/sync
Sync Resources
sync body → 200

Schemas 4

The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are Task (18 properties), Project (12 properties), Due (5 properties), Deadline (2 properties). Each schema is shown below with its type and property counts.

Deadline
object
2 properties
Task
object
18 properties
Due
object
5 properties
Project
object
12 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

todoist-sync-api-openapi.yml Raw ↑

Other APIs Todoist publishes across the network.

Todoist REST API v2
Todoist Comments API
Todoist Labels API
Todoist Projects API
Todoist Reminders API
Todoist Sections API
Todoist Tasks API
Todoist User API
Todoist Workspaces API
Where this information came from

This is an independent, third-party profile of Todoist Sync API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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