Motherduck REST API

REST API Administration

Use this skill when the user needs to manage MotherDuck service accounts, supported token operations, Duckling configuration, active accounts, or Dive embed sessions through the REST API.

Source Of Truth

• Prefer current MotherDuck REST API documentation, the public OpenAPI spec at https://api.motherduck.com/docs/specs, or an explicit OpenAPI spec supplied by the user.
• For token scope and embed behavior, cross-check the REST API docs and the Embedded Dives docs because they include operational constraints not obvious from the raw schema.
• If the MotherDuck MCP ask_docs_question feature is available, use it to check whether public REST API guidance has changed.
• Treat endpoint availability, preview status, token fields, and role requirements as current only when backed by the supplied spec or current docs.

Default Posture

• Treat the REST API as the control plane. Use motherduck-query for SQL and data-plane work.
• Use https://api.motherduck.com as the base URL unless the user provides another environment.
• Authenticate with Authorization: Bearer ${MOTHERDUCK_ADMIN_TOKEN} and keep admin read-write tokens in backend-managed secrets.
• Never use read-scaling tokens for REST API administration.
• Prefer read-before-write flows for configuration changes so the current account, service account, Duckling config, or Dive metadata is known before mutation.
• Treat POST /v1/users as service-account creation unless current docs explicitly broaden the API.
• Assume active-account, Duckling configuration, service-account creation, service-account token creation, and Dive embed-session endpoints require an organization admin bearer token unless current docs say otherwise.
• Never expose generated access tokens in logs, browser code, client bundles, or committed files.
• Confirm destructive deletes with the user. Deleting a user permanently deletes that user and all of their data.

Workflow

1. Identify whether the task is service-account provisioning, token management, Duckling sizing, active-account inspection, or Dive embedding.
2. Confirm the admin token location and the target username or dive_id; never invent production identifiers.
3. Check token scope before calling token endpoints: users can create tokens for themselves, and admins can create tokens for service accounts, but admins cannot create tokens for other non-service-account members through the API.
4. For Duckling config changes, read the current config first, then update both read_write and read_scaling because the PUT payload requires both.
5. Preserve response fields that are only returned once, especially newly created token strings and embed session strings.
6. Surface API errors by status and response body; do not hide 400, 401, 403, 404, or 500 responses behind success-shaped fallbacks.

Open Next

• references/REST_API_GUIDE.md for endpoint summaries, auth headers, request payloads, curl examples, validation limits, and operational gotchas

Related Skills

• motherduck-connect for connection tokens and application connection posture
• motherduck-security-governance for admin-token handling, service-account posture, and access-boundary questions
• motherduck-create-dive for designing Dives before minting embed sessions