Create Sandbox

Create a sandbox. The name must be unique within the workspace. Where the deployment prebuilds dependency images, the build is scheduled and reported through buildStatus; a deployment that installs at run time, or a sandbox with nothing to install, has no build and reports buildStatus: null. A dependency or system-package entry the builder cannot accept is a 400 whose error.details names the field and the offending entries. Requires a workspace admin on a Max or Enterprise plan; a lower plan is refused with 403 and error.details.code WORKSPACE_PLAN_CAPABILITY_REQUIRED. Creates and updates in a workspace share one write budget, whatever the install strategy, and a burst is refused with 429 and a Retry-After header. A workspace API key is rejected with 403; use a personal API key.

POST/api/v2/sandboxes

Authorization

apiKey
X-API-Key<token>

Your Sim API key, personal or workspace-scoped. Generate one under Settings, then API Keys. Operations that reject workspace keys say so in their own description.

In: header

Request Body

application/json

Name, language, and dependency set of a new sandbox.

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

curl -X POST "https://www.sim.ai/api/v2/sandboxes" \  -H "X-API-Key: YOUR_API_KEY" \  -H "Content-Type: application/json" \  -d '{    "workspaceId": "a91c4b2e-6d3f-4e8a-b5c7-0d9e2f1a8c64",    "name": "data-tools",    "language": "python",    "dependencies": [      "pandas==2.2.2",      "requests"    ],    "systemPackages": [      "graphviz"    ]  }'
{
  "data": {
    "id": "V1StGXR8Z5jdHi6BmyT",
    "name": "data-tools",
    "language": "python",
    "dependencies": [
      "pandas==2.2.2",
      "requests"
    ],
    "cliTools": [],
    "systemPackages": [
      "graphviz"
    ],
    "buildStatus": "pending",
    "errorCode": null,
    "errorMessage": null,
    "errorDetail": null,
    "builtAt": null,
    "createdAt": "2026-06-01T09:14:00.000Z",
    "updatedAt": "2026-06-20T14:02:11.000Z"
  }
}
{
  "error": {
    "code": "BAD_REQUEST",
    "message": "Invalid request"
  }
}
{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "API key required"
  }
}
{
  "error": {
    "code": "FORBIDDEN",
    "message": "Insufficient workspace permissions",
    "details": {
      "code": "INSUFFICIENT_WORKSPACE_ROLE"
    }
  }
}
{
  "error": {
    "code": "NOT_FOUND",
    "message": "Not found"
  }
}
{
  "error": {
    "code": "CONFLICT",
    "message": "The request conflicts with the current state of the resource"
  }
}
{
  "error": {
    "code": "PAYLOAD_TOO_LARGE",
    "message": "Request body is too large"
  }
}
{
  "error": {
    "code": "UNSUPPORTED_MEDIA_TYPE",
    "message": "Request body must be sent as application/json"
  }
}
{
  "error": {
    "code": "RATE_LIMITED",
    "message": "API rate limit exceeded",
    "details": {
      "retryAfter": "2026-01-01T00:00:30.000Z"
    }
  }
}
{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error"
  }
}
{
  "error": {
    "code": "SERVICE_UNAVAILABLE",
    "message": "Service temporarily unavailable"
  }
}
PATCHUpdate Custom ToolDELETEDelete Sandbox