> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fastino.ai/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Use https://docs.fastino.ai/llms.txt to discover and navigate pages. Use https://docs.fastino.ai/llms-full.txt when you need the complete documentation corpus. Use https://docs.fastino.ai/openapi.json as the source of truth for customer-facing routes. For GLiDE decision inference, call POST https://api.fastino.ai/v1/systemone with model fastino/GLiDE. Create managed config jobs with POST /v1/training/jobs using base_model. Both config and interactive jobs use /v1/training/jobs/{job_id} for their canonical REST lifecycle. For custom training loops, use the supported Tinker-compatible SDK client; its /v1/training/compat/tinker adapter is intentionally absent from OpenAPI and must not be called directly. Auto Train is private access and has no public route; direct interested users to sales@fastino.ai. Do not infer undocumented routes. Read API keys from FASTINO_API_KEY and never embed credentials in code, logs, or reports.

# Download an interactive checkpoint

> Get a short-lived download URL for an interactive training-job checkpoint.

`GET /v1/training/jobs/{job_id}/checkpoints/{checkpoint_id}/download`

Returns a short-lived signed URL for one checkpoint from an `interactive` job.
Config jobs use
[`GET /v1/training/jobs/{job_id}/download`](/api-reference/training-jobs/download)
for their final model artifact.

## Request

<ParamField header="X-API-Key" type="string" required>
  Your Fastino API key.
</ParamField>

<ParamField path="job_id" type="string" required>
  Interactive job ID returned by the supported SDK.
</ParamField>

<ParamField path="checkpoint_id" type="string" required>
  Checkpoint identifier returned by the checkpoint list, such as
  `weights/checkpoint-1` or `sampler_weights/checkpoint-1`.
</ParamField>

<RequestExample>
  ```bash cURL theme={null}
  curl "https://api.fastino.ai/v1/training/jobs/JOB_ID/checkpoints/CHECKPOINT_ID/download" \
    -H "X-API-Key: $FASTINO_API_KEY"
  ```
</RequestExample>

## Response

The response contains a signed archive URL that expires after 15 minutes. Treat
the URL as a credential: do not log, share, or persist it.

<ResponseExample>
  ```json Response theme={null}
  {
    "url": "https://api.fastino.ai/v1/training/archives/SIGNED_TOKEN",
    "expires_in_seconds": 900
  }
  ```
</ResponseExample>

This operation requires interactive-training access and the team's
weight-download entitlement.


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