Send File and Get Hash

Submit a file to receive its SHA3-256 hash. This is the first step in the stamping process.

Attribute	Details
Method	`POST`
Description	This endpoint is used to submit a file. Send the file as formdata in the body.
Endpoint	`https://integritas.technology/core/v1/file/hash`

Request Headers

Header	Value	Description
Content-Type	`multipart/form-data`	Specifies the content type as JSON
x-api-key	`your-api-key`	Add your API-key from your profile at https://integritas.technology/
x-request-id	`your-choice`	Add a request id to trace every step of the process

Request Body

Request Type	Content-Type	Body Type	Keys	Description
File upload	`multipart/form-data`	`form-data`	`file`	Send file

Request Examples

curl -X POST https://integritas.technology/core/v1/file/hash \
  -H "x-api-key: your-api-key" \
  -H "x-request-id: your-choice" \
  -F "file=@path/to/yourfile.pdf"

API Demo

Try the endpoint with your own API key and file. The request is sent directly to the API, and the response is displayed below.

Your API key is only used for this request and is not stored.

API Response

The response from the API contains the hash of the file.

Example Response

{
  "service": "CORE_API",
  "apiVersion": 1,
  "requestId": "send-file-hash",
  "status": "success",
  "statusCode": 200,
  "message": "Hash computed",
  "timestamp": "2026-01-16T14:15:01.308Z",
  "data": {
    "hash": "E630FCDE204036E93323AE99843BF0EC6D03CAEB51CBBEA11E03D6739F8E9C3F",
    "filename": "source_256kb.pdf",
    "mimeType": "application/pdf"
  }
}

Response Fields

For a complete description of the response envelope and fields used by this endpoint, see API Response Schema — Send File and Get Hash.