---
title: "List the checkpoints saved during a TrainingSession. Access is scoped to the session's account."
method: GET
path: "/v1/accounts/{account_id}/trainingSessions/{training_session_id}/checkpoints"
tags: ["gateway.openapi_Gateway"]
---

# List the checkpoints saved during a TrainingSession. Access is scoped to the session's account.

`GET /v1/accounts/{account_id}/trainingSessions/{training_session_id}/checkpoints`

## Request

- Base URL: `https://api.fireworks.ai`
- URL: `https://api.fireworks.ai/v1/accounts/{account_id}/trainingSessions/{training_session_id}/checkpoints`
- Auth: HTTP bearer
- TypeScript: <https://skmtc.dev/fw-ai-external/apis/gateway-rest-api/docs/v1/accounts/:account_id/trainingSessions/:training_session_id/checkpoints/get.ts> (a function with typed inputs; its response is checked against the schema)

## Path parameters

- `account_id` string, required
- `training_session_id` string, required

## Query parameters

- `pageSize` integer
- `pageToken` string

## Response `200`

A successful response.

- GatewayListTrainingSessionCheckpointsResponse
  - `trainingSessionCheckpoints` GatewayTrainingSessionCheckpoint[]: The checkpoints in this page, newest first.
    - `name` string
    - `checkpointType` 'CHECKPOINT_TYPE_UNSPECIFIED' | 'CHECKPOINT_TYPE_INFERENCE_BASE' | 'CHECKPOINT_TYPE_INFERENCE_ARC_V2' | 'CHECKPOINT_TYPE_INFERENCE_LORA' | 'CHECKPOINT_TYPE_TRAINING' | 'CHECKPOINT_TYPE_TRAINING_LORA': - CHECKPOINT_TYPE_INFERENCE_BASE: Inference-ready checkpoint (full-parameter, HuggingFace format). Promotable to a model for serving. - CHECKPOINT_TYPE_INFERENCE_ARC_V2: Inference-ready checkpoint (XOR delta compressed, ARC v2 format). Not directly promotable. - CHECKPOINT_TYPE_INFERENCE_LORA: Inference-ready LoRA adapter checkpoint (HuggingFace PEFT format). Promotable to an addon model for serving. - CHECKPOINT_TYPE_TRAINING: Training checkpoint (full-parameter) with optimizer state. Not promotable to a model; used for training resume. - CHECKPOINT_TYPE_TRAINING_LORA: Training checkpoint from a LoRA run (adapter weights + optimizer state). Not promotable; used for training resume.
    - `checkpointName` string: The name given to this checkpoint when it was saved (e.g. "step-5").
    - `createTime` string, date-time
    - `promotable` boolean: True when this checkpoint can be promoted to an inference Model (inference adapters). False for resumable training-state checkpoints.
    - `updateTime` string, date-time: Mirrors create_time. Checkpoints are immutable once saved, so there is no separate update event; present for resource-shape uniformity.
    - `availability` GatewayCheckpointAvailability[]: Where the checkpoint's bytes are available — at most one entry per (availability_class, region). MANAGED_DURABLE for the durable copy; SINGLE_REGION for a region-local copy.
      - `availabilityClass` 'AVAILABILITY_CLASS_UNSPECIFIED' | 'SINGLE_REGION' | 'MANAGED_DURABLE': - SINGLE_REGION: Stored in one Fireworks runtime region. Optimized for low-latency hotload and reattach, but not highly available across regions. - MANAGED_DURABLE: Stored in Fireworks-managed durable storage for restore/export workflows.
      - `region` 'REGION_UNSPECIFIED' | 'US_IOWA_1' | 'US_VIRGINIA_1' | 'US_VIRGINIA_2' | 'US_ILLINOIS_1' | 'AP_TOKYO_1' | 'US_ARIZONA_1' | 'US_TEXAS_1' | 'US_ILLINOIS_2' | 'EU_FRANKFURT_1' | 'US_TEXAS_2' | 'EU_ICELAND_1' | 'EU_ICELAND_2' | 'US_WASHINGTON_1' | 'US_WASHINGTON_2' | 'US_WASHINGTON_3' | 'AP_TOKYO_2' | 'US_CALIFORNIA_1' | 'US_UTAH_1' | 'US_ARIZONA_3' | 'US_GEORGIA_1' | 'US_GEORGIA_2' | 'US_WASHINGTON_4' | 'US_GEORGIA_3' | 'NA_BRITISHCOLUMBIA_1' | 'US_GEORGIA_4' | 'US_OHIO_1' | 'US_NEWYORK_1' | 'EU_NETHERLANDS_1' | 'US_WASHINGTON_5' | 'US_MINNESOTA_1' | 'US_CALIFORNIA_2' | 'NA_BRITISHCOLUMBIA_2' | 'AP_MALAYSIA_2' | 'US_OREGON_1' | 'NA_BRITISHCOLUMBIA_3' | 'AP_NEWSOUTHWALES_1' | 'AP_TAIWAN_1'
      - `createTime` string, date-time
      - `updateTime` string, date-time
  - `nextPageToken` string: Pass as page_token in a subsequent request to fetch the next page. Empty when there are no more results.
  - `totalSize` integer: Total number of checkpoints on the session across all pages.

## Changes

- **2026-10-16** `3bf245180173`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/fw-ai-external/apis/gateway-rest-api/changes/v1/accounts/:account_id/trainingSessions/:training_session_id/checkpoints/get.md)

---

[API](https://skmtc.dev/fw-ai-external/apis/gateway-rest-api.md) - [All operations](https://skmtc.dev/fw-ai-external/apis/gateway-rest-api/llms.txt) - [OpenAPI document](https://skmtc.dev/fw-ai-external/apis/gateway-rest-api/revisions/3bf245180173?raw)