---
title: "Run the zero-auth sandbox first API call"
method: GET
path: "/api/sandbox/first-call"
---

# Run the zero-auth sandbox first API call

`GET /api/sandbox/first-call`

## Request

- Base URL: `https://gstcranes.com`
- URL: `https://gstcranes.com/api/sandbox/first-call`
- Auth: none declared

Read-only sandbox environment for agents to make a first API call without an API key, account session, credit spend, or data mutation.

## Headers

- `GST-API-Version` string

## Response `200`

Sandbox first-call response

- SandboxFirstCall
  - `ok` true, required
  - `mode` 'sandbox', required
  - `auth` 'none', required
  - `side_effects` false, required
  - `read_only` true, required
  - `mutates` string[], required
  - `writes` false, required
  - `message` string, required
  - `sample_curl` string, required
  - `next` object, required
    - `developer_resources` string, uri, required
    - `developers` string, uri, required
    - `developer_resources_markdown` string, uri, required
    - `auth` string, uri, required
    - `openapi` string, uri, required
    - `companies` string, uri, required

## Other responses

- `429`: Rate limit exceeded.
- `500`: Unexpected server error.
- `default`: Machine-readable API error.

---

[API](https://skmtc.dev/gstcranes/apis/gst-cranes-companies-api.md) · [All operations](https://skmtc.dev/gstcranes/apis/gst-cranes-companies-api/llms.txt) · [OpenAPI document](https://skmtc.dev/gstcranes/apis/gst-cranes-companies-api/revisions/0248d238b736?raw)