---
title: "Conductor Checkpoint"
method: POST
path: "/api/sdk/conductor/{sessionId}/checkpoint"
tags: ["Conductor"]
---

# Conductor Checkpoint

`POST /api/sdk/conductor/{sessionId}/checkpoint`

## Request

- Base URL: `https://mcp.usertold.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://mcp.usertold.ai/api/sdk/conductor/{sessionId}/checkpoint`
- Auth: none declared

Execute the UserTold conductor checkpoint operation.

## Path parameters

- `sessionId` string, required: sessionId path parameter

## Request body

- object
  - `trigger` 'pagehide' | 'beforeunload', required
  - `recorder_state` 'idle' | 'ready' | 'recording' | 'paused' | 'stopped' | 'error' | 'null', nullable
  - `transition` object
    - `id` string, required
    - `source` 'study_navigation' | 'page_reload', required
    - `fromUrl` string, required
    - `fromTitle` string
    - `targetUrl` string
    - `ts` number, required
  - `widget_events` object[]
    - `name` string, required
    - `ts` number, required
    - `data` object, required
  - `transcripts` union[]
    - union
      - object
        - `role` 'user'
        - `text` string, required
        - `ts` number, required
        - `source` 'sts' | 'sts_fallback'
        - `captureSegmentId` string, required
        - `captureEpoch` integer, required
        - `transportId` string, required
      - object
        - `role` 'user'
        - `text` string, required
        - `ts` number, required
        - `source` 'sts' | 'sts_fallback'
        - `capture_segment_id` string, required
        - `capture_epoch` integer, required
        - `transport_id` string, required
  - `transcription_usage` object
    - `sequence` integer, required
    - `audioSeconds` number, required
    - `keySourceToken` string

## Response `200`

Success

- object
  - `success` boolean, required
  - `checkpointed` boolean, required

## Other responses

- `400`: Bad request
- `401`: Not authenticated
- `403`: Origin rejected by conductor runtime guard
- `404`: Not found
- `422`: Domain error (non-retryable)
- `500`: Internal server error
- `503`: Domain error (retryable)

---

[API](https://skmtc.dev/usertold/apis/usertold-ai-api.md) · [All operations](https://skmtc.dev/usertold/apis/usertold-ai-api/llms.txt) · [OpenAPI document](https://skmtc.dev/usertold/apis/usertold-ai-api/revisions/37d5b4f88d38?raw)