verdande/docs/api.md

API

REST under /api/v1, JSON in and out. Everything the web interface does goes through it, so anything you can do there you can script.

Authenticating

Two ways, accepted everywhere.

A session cookie, which the web interface uses. httpOnly, so nothing but the browser handles it.

A personal API token, which is what scripts use:

curl -H "Authorization: Bearer vrd_..." https://todo.example.dk/api/v1/tasks

Make one under Settings → API tokens. It carries your permissions exactly — there is no separate service identity.

Errors

Every failure has the same shape:

{
  "code": "validation_failed",
  "error": "one or more fields are not valid",
  "fields": { "due_date": "must be a date like 2026-03-15" }
}

code is stable and meant to be matched on. error is English prose for a log — what a person reads is decided by the client, which knows what language they are in.

Code	Status	Means
bad_request	400	The body could not be read.
unauthorized	401	Not signed in, or the token is wrong.
totp_required	401	The login still needs its verification code.
forbidden	403	Cross-site request, or admin needed.
not_found	404	Does not exist, or you cannot see it.
conflict	409	Already exists, or the state does not allow it.
validation_failed	422	Check fields.
rate_limited	429	Too many attempts.
internal_error	500	Our fault.

!!! note "404 rather than 403" Anything you may not see answers 404. A 403 would confirm the thing exists, which is what somebody trying ids is hoping to learn.

The endpoints

Tasks

Method	Path
GET	/tasks	List. Filter with project_id, label_id, priority, due_before, due_from, no_date, assignee_id=me, q, completed=include|only.
POST	/tasks	Create.
POST	/tasks/quick-add	Create from one line of natural language.
GET	/tasks/quick-add/preview?text=	Parse without saving.
GET	/tasks/{id}	One task.
PATCH	/tasks/{id}	Change it. Only the fields you send.
DELETE	/tasks/{id}	To the trash, recoverable for 30 days.
POST	/tasks/{id}/complete	Tick off. A repeating task advances instead.
POST	/tasks/{id}/reopen	Un-tick.
POST	/tasks/{id}/move	Reorder: {"after_id": …, "before_id": …}.

curl -X POST https://todo.example.dk/api/v1/tasks/quick-add \
  -H "Authorization: Bearer vrd_..." \
  -H "Content-Type: application/json" \
  -d '{"text": "betal moms i morgen kl 10 p1 #Firma @regnskab"}'

Projects and sections

Method	Path
GET POST	/projects	List, create.
GET PATCH DELETE	/projects/{id}	Read, change, trash. Owner only for the last two.
GET POST	/projects/{id}/sections
PATCH DELETE	/sections/{id}
GET	/projects/{id}/members
POST	/projects/{id}/invites	Share it. {"email": …, "role": "editor"|"viewer"}
DELETE	/projects/{id}/members/{userID}
GET	/projects/{id}/activity

Views, filters and labels

Method	Path
GET	/today	Overdue and due today, in your timezone.
GET	/upcoming?days=7	One entry per day, empty days included.
GET	/search?q=	Across everything you can see.
GET POST	/filters
GET	/filters/{id}/tasks	Run one.
GET	/filters/preview?query=	Run an expression without saving it.
GET POST	/labels

Comments and attachments

Method	Path
GET POST	/tasks/{id}/comments
PATCH DELETE	/comments/{id}	Author only for editing.
POST	/tasks/{id}/attachments	multipart/form-data, field file, 25 MB.
GET DELETE	/attachments/{id}

Import and export

Method	Path
POST	/import/todoist	A Todoist CSV, multipart/form-data.
POST	/import/csv	Mapped rows as JSON.
GET	/export/account	Everything, as JSON.
GET	/export/projects/{id}.csv	Todoist-compatible.
GET	/export/projects/{id}.ics	A calendar file.

Everything else

Method	Path
GET	/ws	WebSocket. Live changes to projects you can see.
GET	/notifications
GET POST	/feed, /feed/rotate	The calendar feed URL.
GET POST	/mail-address, /mail-address/rotate	The mail-to-task address.
POST	/mcp	The MCP endpoint.
GET	/healthz	Unauthenticated. Reads the database rather than merely answering.

Live updates

const socket = new WebSocket('wss://todo.example.dk/api/v1/ws');
socket.onmessage = (event) => {
  const { type, project_id, payload } = JSON.parse(event.data);
  // task.created, task.updated, task.completed, task.deleted,
  // task.moved, comment.created, notification, reminder
};

One-way by design: nothing a client sends over the socket changes anything. Writes go through the REST API, where the permission checks are.

Rate limits

Only where guessing matters: ten login attempts per address per fifteen minutes, five password-reset requests per hour. The rest of the API is not limited — it is your server.