Update file content

Replaces the full UTF-8 text content of a workspace file and updates metadata such as size and modification time.

PUT/api/v1/files/{fileId}/content

Replaces the full UTF-8 text content of a workspace file and updates metadata such as size and modification time.

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

content*string

contentType?string

Response Body

`application/json`

curl -X PUT "https://loading/api/v1/files/{fileId}/content" \  -H "Content-Type: application/json" \  -d '{    "content": "# Untitled\\n",    "contentType": "text/markdown; charset=utf-8"  }'

{
  "file": {
    "id": "5b77df28-69d0-4565-a40b-874c3af4d4d4",
    "name": "notes.md",
    "originalName": "notes.md",
    "directory": null,
    "path": "notes.md",
    "contentType": "text/markdown; charset=utf-8",
    "extension": "md",
    "sizeBytes": 11,
    "checksumSha256": null,
    "metadata": {
      "label": "invoice",
      "origin": "customer-portal"
    },
    "source": "direct",
    "status": "uploaded",
    "externalUrl": null,
    "etag": "c0ffee1234567890",
    "errorMessage": null,
    "createdAt": "2026-03-06T18:00:00.000Z",
    "updatedAt": "2026-03-06T18:01:00.000Z",
    "completedAt": "2026-03-06T18:01:00.000Z"
  },
  "content": "# Notes\n"
}

{
  "issues": [
    {
      "_tag": "Pointer",
      "path": [
        "string"
      ],
      "message": "string"
    }
  ],
  "message": "string",
  "_tag": "HttpApiDecodeError"
}

{
  "code": "authentication_required",
  "message": "Authentication required. Send Authorization: Bearer <api-key>, x-api-key, or a signed-in session."
}

{
  "code": "insufficient_permissions",
  "message": "This API key does not have files.write permission.",
  "details": {
    "requiredPermission": "files.write"
  }
}

{
  "code": "not_found",
  "message": "The requested resource was not found."
}

{
  "code": "internal_error",
  "message": "An unexpected server error occurred."
}

Update file content

Request Body

Response Body

200application/json

400application/json

401application/json

403application/json

404application/json

500application/json

`application/json`

`application/json`

`application/json`

`application/json`

`application/json`

`application/json`