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n8n

Validate documents with AI in n8n

HTTP Request node with multipart. Native node, Make and Zapier: coming soon.

Install

HTTP Request node

The safe pattern

The browser or app never sees your secret key. The file goes to your server, your server calls Constaia and returns the verdict.

A native node is on the way. Meanwhile, use the HTTP Request node.

Full guide
HTTP Request
{
  "method": "POST",
  "url": "https://api.constaia.com/v1/analyze",
  "authentication": "genericCredentialType",
  "genericAuthType": "httpHeaderAuth",
  "sendBody": true,
  "contentType": "multipart-form-data",
  "bodyParameters": {
    "parameters": [
      { "parameterType": "formBinaryData", "name": "file", "inputDataFieldName": "data" },
      { "name": "options", "value": "{\"expect\":\"es_dni\",\"checks\":{\"not_expired\":true}}" }
    ]
  }
}

One call. An answer you can act on.

  1. 01

    Send the document and what you expect

    Photo, screenshot or PDF. Set the expected type and the rules: not expired, under 6 months old, in this person's name.

  2. 02

    We read, classify and check

    European OCR, AI classification and deterministic validators: NIF letter, MRZ, IBAN, dates and totals.

  3. 03

    Get the verdict and delete the file

    valid, invalid or review with reasons in your language. By default the file is deleted when the analysis ends.

And for the record…

Create your account, copy the test key and validate your first document in five minutes.

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