Getting error "Enter a valid file" while creating sign request

Box Platform Box Sign
1

Api Path : https://{{api.box.com}}/2.0/sign_requests

Request Body:

{
  "is_document_preparation_needed": true,
  "parent_folder": {
    "id": "242033790140",
    "type": "folder"
  },
  "name": "new file",
  "days_valid": 2,
  "source_files": [
    {
      "id": "1402075677437",
      "type": "file"
    }
  ],
  "signature_color": "blue",
  "signers": [
    {
      "email": "abc@gmail.com",
      "role": "final_copy_reader"
    }
  ]
}

Response :

{
    "type": "error",
    "code": "bad_request",
    "status": 400,
    "message": "Bad request",
    "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
    "request_id": "0161f8a960ede1346f50bfdc34b75156f",
    "context_info": {
        "errors": [
            {
                "name": "source_files",
                "message": "Enter a valid file.",
                "reason": "invalid_parameter"
            }
        ]
    }
}
2

Hi @vikas161 , welcome to the forum.

From the error my immediate question is what type of file are you trying to sign?

My next question is you’re not specifying a signer, just the final copy reader, so are you trying to sign the file yourself, meaning the application logged user?

Here is a quick start exemple, almost identical to your own:

curl --location 'https://api.box.com/2.0/sign_requests' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer <access token>'
--data-raw '{
    "is_document_preparation_needed": true,
    "parent_folder": {
        "id": "234102987614",
        "type": "folder"
    },
    "source_files": [
        {
            "id": "1355143830404",
            "type": "file"
        }
    ],
    "signers": [
        {
            "email": "signer@example.com",
            "role": "signer"
        }
    ]
}'

Resulting in:

{
    "is_document_preparation_needed": true,
    "signers": [
        {
            "email": "requester@example.com",
            "role": "final_copy_reader",
        },
        {
            "email": "signer@example.com",
            "role": "signer",
        }
    ],
    "id": "348decab-48a8-4f2c-9436-8967afebf7bb",
    "prepare_url": "https://app.box.com/sign/document/xyz-abc-123/.../prepare_doc/",
    "source_files": [
        {
            "id": "1355143830404",
            "type": "file",
        }
    ],
    "parent_folder": {
        "id": "234102987614",
        "type": "folder",
    },
    "name": "Simple-PDF.pdf",
    "type": "sign-request",
    "status": "converting",
    "sign_files": {
        "files": [
            {
                "id": "1381301154812",
                "type": "file",
            }
        ],
        "is_ready_for_download": true
    },
    "template_id": null
}

Help us understand your use case a bit better.

Check out this FAQ on supported file types. Essentially if Box can convert it to a PDF, it should be able to sign it.

Cheers