rental_agreement

Rental agreement

Residential or commercial lease from any country: landlord, tenant, property, term, rent and deposit.

Category: Proof of address
Country: International
Extracted fields: 11 fields
Cost: 1 credit

rental_agreementspecimen

Landlord
Tenants
Property address
Cadastral reference
Start date
End date
Monthly rent
Currency
Deposit

What it checks

No type-specific deterministic validators: your checks apply (required fields, dates, holder).

Extracted fields

Landlordlandlord
Tenantstenants
Property addressproperty_address
Cadastral referencecadastral_reference
Start datestart_date
End dateend_date
Monthly rentmonthly_rent
Currencycurrency
Depositdeposit
Signature datesignature_date
Signatures presentsignatures_present

Sample request

curl https://api.constaia.com/v1/analyze \
  -H "Authorization: Bearer $CONSTAIA_API_KEY" \
  -F "file=@document.pdf" \
  -F 'options={
    "expect": "rental_agreement",
    "checks": {},
    "storage": "none"
  }'

Sample response

Fictitious data. Shortened response.

200 OK · application/json

{
  "id": "an_01J9Z3K8QW4T6Y2B7N5M1R0PXC",
  "object": "analysis",
  "status": "completed",
  "livemode": false,
  "document": {
    "type": "rental_agreement",
    "label": "Rental agreement",
    "confidence": 0.97
  },
  "verdict": {
    "expected": [
      "rental_agreement"
    ],
    "match": true,
    "status": "valid",
    "reasons": [
      {
        "code": "type_match",
        "severity": "info",
        "message": "The document is: Rental agreement."
      }
    ]
  },
  "fields": {
    "landlord": {
      "value": {
        "name": "ESPECIMEN",
        "tax_id": "ESPECIMEN",
        "address": "ESPECIMEN"
      },
      "confidence": 0.99,
      "validated": true
    },
    "tenants": {
      "value": [
        {
          "name": "ESPECIMEN",
          "tax_id": "ESPECIMEN"
        }
      ],
      "confidence": 0.98,
      "validated": null
    },
    "property_address": {
      "value": "ESPECIMEN",
      "confidence": 0.97,
      "validated": null
    },
    "cadastral_reference": {
      "value": "ESPECIMEN",
      "confidence": 0.96,
      "validated": null
    },
    "start_date": {
      "value": "2026-09-01",
      "confidence": 0.99,
      "validated": null
    },
    "end_date": {
      "value": "2026-09-01",
      "confidence": 0.98,
      "validated": null
    },
    "monthly_rent": {
      "value": 100,
      "confidence": 0.97,
      "validated": null
    },
    "currency": {
      "value": "ESPECIMEN",
      "confidence": 0.96,
      "validated": null
    },
    "deposit": {
      "value": 100,
      "confidence": 0.99,
      "validated": null
    },
    "signature_date": {
      "value": "2026-09-01",
      "confidence": 0.98,
      "validated": null
    },
    "signatures_present": {
      "value": true,
      "confidence": 0.97,
      "validated": null
    }
  },
  "checks": [],
  "warnings": [],
  "storage": {
    "mode": "none",
    "file_deleted_at": "2026-09-29T10:00:02Z",
    "expires_at": null
  },
  "usage": {
    "credits": 1,
    "pages": 1
  }
}

FAQ

Does Constaia prove the document is authentic?

No. It checks the type, data consistency and your rules, and flags signals such as a possible edit or a screen photo. That does not prove authenticity.

Is a copy of the document kept?

No, unless you ask for it. With storage "none" (the default) the file is deleted when the analysis ends.

And for the record…

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