Request
curl -X POST https://api.iterationlayer.com/document-extraction/v1/extract \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"files": [
{
"type": "url",
"name": "appraisal.pdf",
"url": "https://example.com/appraisals/2026-0042.pdf"
}
],
"schema": {
"fields": [
{
"name": "subject_address",
"type": "ADDRESS",
"description": "Address of the subject property being appraised"
},
{
"name": "appraised_value",
"type": "CURRENCY_AMOUNT",
"description": "Final appraised market value of the property"
},
{
"name": "effective_date",
"type": "DATE",
"description": "Date of the appraisal"
},
{
"name": "property_type",
"type": "ENUM",
"description": "Type of property",
"values": ["single_family", "condo", "multi_family", "commercial", "land"],
"max_selected": 1
},
{
"name": "gross_living_area_sqft",
"type": "INTEGER",
"description": "Gross living area in square feet"
},
{
"name": "year_built",
"type": "INTEGER",
"description": "Year the property was built"
},
{
"name": "bedrooms",
"type": "INTEGER",
"description": "Number of bedrooms"
},
{
"name": "bathrooms",
"type": "DECIMAL",
"description": "Number of bathrooms",
"decimal_points": 1
},
{
"name": "comparable_sales",
"type": "ARRAY",
"description": "Comparable sales used in the appraisal",
"item_schema": {
"fields": [
{
"name": "address",
"type": "ADDRESS",
"description": "Address of the comparable property"
},
{
"name": "sale_price",
"type": "CURRENCY_AMOUNT",
"description": "Sale price of the comparable"
},
{
"name": "sale_date",
"type": "DATE",
"description": "Date of the comparable sale"
},
{
"name": "gross_living_area_sqft",
"type": "INTEGER",
"description": "Gross living area of the comparable in square feet"
}
]
}
}
]
}
}'Response
{
"success": true,
"data": {
"subject_address": {
"value": {
"street": "412 Ridgewood Lane",
"city": "Denver",
"region": "CO",
"postal_code": "80203",
"country": "US"
},
"confidence": 0.98,
"citations": ["412 Ridgewood Lane, Denver, CO 80203"]
},
"appraised_value": {
"value": { "amount": "685000.00", "currency": "USD" },
"confidence": 0.97,
"citations": ["Market Value Opinion: $685,000"]
},
"effective_date": {
"value": "2026-03-15",
"confidence": 0.99,
"citations": ["Effective Date: March 15, 2026"]
},
"property_type": {
"value": ["single_family"],
"confidence": 0.99,
"citations": ["Single Family Residence"]
},
"gross_living_area_sqft": {
"value": 2140,
"confidence": 0.97,
"citations": ["GLA: 2,140 sq ft"]
},
"year_built": {
"value": 1998,
"confidence": 0.99,
"citations": ["Year Built: 1998"]
},
"bedrooms": {
"value": 4,
"confidence": 0.99,
"citations": ["Bedrooms: 4"]
},
"bathrooms": {
"value": 2.5,
"confidence": 0.98,
"citations": ["Bathrooms: 2.5"]
},
"comparable_sales": {
"value": [
{
"address": {
"value": {
"street": "388 Ridgewood Lane",
"city": "Denver",
"region": "CO",
"postal_code": "80203",
"country": "US"
},
"confidence": 0.96,
"citations": ["388 Ridgewood Lane, Denver, CO 80203"]
},
"sale_price": {
"value": { "amount": "672000.00", "currency": "USD" },
"confidence": 0.97,
"citations": ["Sale Price: $672,000"]
},
"sale_date": {
"value": "2026-01-20",
"confidence": 0.98,
"citations": ["Date of Sale: 01/20/2026"]
},
"gross_living_area_sqft": {
"value": 2090,
"confidence": 0.96,
"citations": ["GLA: 2,090"]
}
}
],
"confidence": 0.96,
"citations": []
}
}
}Request
import { IterationLayer } from "iterationlayer";
const client = new IterationLayer({ apiKey: "YOUR_API_KEY" });
const result = await client.extract({
files: [
{
type: "url",
name: "appraisal.pdf",
url: "https://example.com/appraisals/2026-0042.pdf",
},
],
schema: {
fields: [
{
name: "subject_address",
type: "ADDRESS",
description: "Address of the subject property being appraised",
},
{
name: "appraised_value",
type: "CURRENCY_AMOUNT",
description: "Final appraised market value of the property",
},
{
name: "effective_date",
type: "DATE",
description: "Date of the appraisal",
},
{
name: "property_type",
type: "ENUM",
description: "Type of property",
values: [
"single_family",
"condo",
"multi_family",
"commercial",
"land",
],
max_selected: 1,
},
{
name: "gross_living_area_sqft",
type: "INTEGER",
description: "Gross living area in square feet",
},
{
name: "year_built",
type: "INTEGER",
description: "Year the property was built",
},
{
name: "bedrooms",
type: "INTEGER",
description: "Number of bedrooms",
},
{
name: "bathrooms",
type: "DECIMAL",
description: "Number of bathrooms",
decimal_points: 1,
},
{
name: "comparable_sales",
type: "ARRAY",
description: "Comparable sales used in the appraisal",
item_schema: {
fields: [
{
name: "address",
type: "ADDRESS",
description: "Address of the comparable property",
},
{
name: "sale_price",
type: "CURRENCY_AMOUNT",
description: "Sale price of the comparable",
},
{
name: "sale_date",
type: "DATE",
description: "Date of the comparable sale",
},
{
name: "gross_living_area_sqft",
type: "INTEGER",
description: "Gross living area of the comparable in square feet",
},
],
},
},
],
},
});Response
{
"success": true,
"data": {
"subject_address": {
"value": {
"street": "412 Ridgewood Lane",
"city": "Denver",
"region": "CO",
"postal_code": "80203",
"country": "US"
},
"confidence": 0.98,
"citations": ["412 Ridgewood Lane, Denver, CO 80203"]
},
"appraised_value": {
"value": { "amount": "685000.00", "currency": "USD" },
"confidence": 0.97,
"citations": ["Market Value Opinion: $685,000"]
},
"effective_date": {
"value": "2026-03-15",
"confidence": 0.99,
"citations": ["Effective Date: March 15, 2026"]
},
"property_type": {
"value": ["single_family"],
"confidence": 0.99,
"citations": ["Single Family Residence"]
},
"gross_living_area_sqft": {
"value": 2140,
"confidence": 0.97,
"citations": ["GLA: 2,140 sq ft"]
},
"year_built": {
"value": 1998,
"confidence": 0.99,
"citations": ["Year Built: 1998"]
},
"bedrooms": {
"value": 4,
"confidence": 0.99,
"citations": ["Bedrooms: 4"]
},
"bathrooms": {
"value": 2.5,
"confidence": 0.98,
"citations": ["Bathrooms: 2.5"]
},
"comparable_sales": {
"value": [
{
"address": {
"value": {
"street": "388 Ridgewood Lane",
"city": "Denver",
"region": "CO",
"postal_code": "80203",
"country": "US"
},
"confidence": 0.96,
"citations": ["388 Ridgewood Lane, Denver, CO 80203"]
},
"sale_price": {
"value": { "amount": "672000.00", "currency": "USD" },
"confidence": 0.97,
"citations": ["Sale Price: $672,000"]
},
"sale_date": {
"value": "2026-01-20",
"confidence": 0.98,
"citations": ["Date of Sale: 01/20/2026"]
},
"gross_living_area_sqft": {
"value": 2090,
"confidence": 0.96,
"citations": ["GLA: 2,090"]
}
}
],
"confidence": 0.96,
"citations": []
}
}
}Request
from iterationlayer import IterationLayer
client = IterationLayer(api_key="YOUR_API_KEY")
result = client.extract(
files=[
{
"type": "url",
"name": "appraisal.pdf",
"url": "https://example.com/appraisals/2026-0042.pdf",
}
],
schema={
"fields": [
{
"name": "subject_address",
"type": "ADDRESS",
"description": "Address of the subject property being appraised",
},
{
"name": "appraised_value",
"type": "CURRENCY_AMOUNT",
"description": "Final appraised market value of the property",
},
{
"name": "effective_date",
"type": "DATE",
"description": "Date of the appraisal",
},
{
"name": "property_type",
"type": "ENUM",
"description": "Type of property",
"values": ["single_family", "condo", "multi_family", "commercial", "land"],
"max_selected": 1,
},
{
"name": "gross_living_area_sqft",
"type": "INTEGER",
"description": "Gross living area in square feet",
},
{
"name": "year_built",
"type": "INTEGER",
"description": "Year the property was built",
},
{
"name": "bedrooms",
"type": "INTEGER",
"description": "Number of bedrooms",
},
{
"name": "bathrooms",
"type": "DECIMAL",
"description": "Number of bathrooms",
"decimal_points": 1,
},
{
"name": "comparable_sales",
"type": "ARRAY",
"description": "Comparable sales used in the appraisal",
"item_schema": {
"fields": [
{
"name": "address",
"type": "ADDRESS",
"description": "Address of the comparable property",
},
{
"name": "sale_price",
"type": "CURRENCY_AMOUNT",
"description": "Sale price of the comparable",
},
{
"name": "sale_date",
"type": "DATE",
"description": "Date of the comparable sale",
},
{
"name": "gross_living_area_sqft",
"type": "INTEGER",
"description": "Gross living area of the comparable in square feet",
},
]
},
},
]
},
)Response
{
"success": true,
"data": {
"subject_address": {
"value": {
"street": "412 Ridgewood Lane",
"city": "Denver",
"region": "CO",
"postal_code": "80203",
"country": "US"
},
"confidence": 0.98,
"citations": ["412 Ridgewood Lane, Denver, CO 80203"]
},
"appraised_value": {
"value": { "amount": "685000.00", "currency": "USD" },
"confidence": 0.97,
"citations": ["Market Value Opinion: $685,000"]
},
"effective_date": {
"value": "2026-03-15",
"confidence": 0.99,
"citations": ["Effective Date: March 15, 2026"]
},
"property_type": {
"value": ["single_family"],
"confidence": 0.99,
"citations": ["Single Family Residence"]
},
"gross_living_area_sqft": {
"value": 2140,
"confidence": 0.97,
"citations": ["GLA: 2,140 sq ft"]
},
"year_built": {
"value": 1998,
"confidence": 0.99,
"citations": ["Year Built: 1998"]
},
"bedrooms": {
"value": 4,
"confidence": 0.99,
"citations": ["Bedrooms: 4"]
},
"bathrooms": {
"value": 2.5,
"confidence": 0.98,
"citations": ["Bathrooms: 2.5"]
},
"comparable_sales": {
"value": [
{
"address": {
"value": {
"street": "388 Ridgewood Lane",
"city": "Denver",
"region": "CO",
"postal_code": "80203",
"country": "US"
},
"confidence": 0.96,
"citations": ["388 Ridgewood Lane, Denver, CO 80203"]
},
"sale_price": {
"value": { "amount": "672000.00", "currency": "USD" },
"confidence": 0.97,
"citations": ["Sale Price: $672,000"]
},
"sale_date": {
"value": "2026-01-20",
"confidence": 0.98,
"citations": ["Date of Sale: 01/20/2026"]
},
"gross_living_area_sqft": {
"value": 2090,
"confidence": 0.96,
"citations": ["GLA: 2,090"]
}
}
],
"confidence": 0.96,
"citations": []
}
}
}Request
package main
import il "github.com/iterationlayer/sdk-go"
func main() {
client := il.NewClient("YOUR_API_KEY")
result, err := client.Extract(il.ExtractRequest{
Files: []il.FileInput{
il.NewFileFromURL("appraisal.pdf", "https://example.com/appraisals/2026-0042.pdf"),
},
Schema: il.ExtractionSchema{
"subject_address": il.NewAddressFieldConfig(
"subject_address", "Address of the subject property being appraised",
),
"appraised_value": il.NewCurrencyAmountFieldConfig(
"appraised_value", "Final appraised market value of the property",
),
"effective_date": il.NewDateFieldConfig(
"effective_date", "Date of the appraisal",
),
"property_type": il.NewEnumFieldConfig(
"property_type", "Type of property",
[]string{"single_family", "condo", "multi_family", "commercial", "land"},
),
"gross_living_area_sqft": il.NewIntegerFieldConfig(
"gross_living_area_sqft", "Gross living area in square feet",
),
"year_built": il.NewIntegerFieldConfig(
"year_built", "Year the property was built",
),
"bedrooms": il.NewIntegerFieldConfig(
"bedrooms", "Number of bedrooms",
),
"bathrooms": il.NewDecimalFieldConfig(
"bathrooms", "Number of bathrooms",
),
"comparable_sales": il.NewArrayFieldConfig(
"comparable_sales", "Comparable sales used in the appraisal",
[]il.FieldConfig{
il.NewAddressFieldConfig("address", "Address of the comparable property"),
il.NewCurrencyAmountFieldConfig("sale_price", "Sale price of the comparable"),
il.NewDateFieldConfig("sale_date", "Date of the comparable sale"),
il.NewIntegerFieldConfig("gross_living_area_sqft", "Gross living area of the comparable in square feet"),
},
),
},
})
if err != nil {
panic(err)
}
_ = result
}Response
{
"success": true,
"data": {
"subject_address": {
"value": {
"street": "412 Ridgewood Lane",
"city": "Denver",
"region": "CO",
"postal_code": "80203",
"country": "US"
},
"confidence": 0.98,
"citations": ["412 Ridgewood Lane, Denver, CO 80203"]
},
"appraised_value": {
"value": { "amount": "685000.00", "currency": "USD" },
"confidence": 0.97,
"citations": ["Market Value Opinion: $685,000"]
},
"effective_date": {
"value": "2026-03-15",
"confidence": 0.99,
"citations": ["Effective Date: March 15, 2026"]
},
"property_type": {
"value": ["single_family"],
"confidence": 0.99,
"citations": ["Single Family Residence"]
},
"gross_living_area_sqft": {
"value": 2140,
"confidence": 0.97,
"citations": ["GLA: 2,140 sq ft"]
},
"year_built": {
"value": 1998,
"confidence": 0.99,
"citations": ["Year Built: 1998"]
},
"bedrooms": {
"value": 4,
"confidence": 0.99,
"citations": ["Bedrooms: 4"]
},
"bathrooms": {
"value": 2.5,
"confidence": 0.98,
"citations": ["Bathrooms: 2.5"]
},
"comparable_sales": {
"value": [
{
"address": {
"value": {
"street": "388 Ridgewood Lane",
"city": "Denver",
"region": "CO",
"postal_code": "80203",
"country": "US"
},
"confidence": 0.96,
"citations": ["388 Ridgewood Lane, Denver, CO 80203"]
},
"sale_price": {
"value": { "amount": "672000.00", "currency": "USD" },
"confidence": 0.97,
"citations": ["Sale Price: $672,000"]
},
"sale_date": {
"value": "2026-01-20",
"confidence": 0.98,
"citations": ["Date of Sale: 01/20/2026"]
},
"gross_living_area_sqft": {
"value": 2090,
"confidence": 0.96,
"citations": ["GLA: 2,090"]
}
}
],
"confidence": 0.96,
"citations": []
}
}
}Template
{
"name": "Extract Property Appraisal",
"nodes": [
{
"parameters": {
"content": "## Extract Property Appraisal\n\nMortgage lenders, real estate platforms, and appraisal management companies use this recipe to digitize appraisal reports. Upload an appraisal PDF and receive structured JSON with the appraised value, property details, and comparable sales \u2014 ready to feed into your loan origination system or valuation database.\n\n**Note:** This workflow uses the Iteration Layer community node (`n8n-nodes-iterationlayer`). Install it via Settings > Community Nodes before importing. Self-hosted n8n only.",
"height": 280,
"width": 500,
"color": 2
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
200,
40
],
"id": "18c9143e-4361-4a50-952b-dda14da53749",
"name": "Overview"
},
{
"parameters": {
"content": "### Step 1: Extract Data\nResource: **Document Extraction**\n\nConfigure the Document Extraction parameters below, then connect your credentials.",
"height": 160,
"width": 300,
"color": 6
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
475,
100
],
"id": "163e4817-e901-4199-b290-9f0674a62a3d",
"name": "Step 1 Note"
},
{
"parameters": {},
"type": "n8n-nodes-base.manualTrigger",
"typeVersion": 1,
"position": [
250,
300
],
"id": "e7f8a9b0-c1d2-3456-efab-567890123efa",
"name": "Manual Trigger"
},
{
"parameters": {
"resource": "documentExtraction",
"schemaInputMode": "rawJson",
"schemaJson": "{\"fields\":[{\"name\":\"subject_address\",\"type\":\"ADDRESS\",\"description\":\"Address of the subject property being appraised\"},{\"name\":\"appraised_value\",\"type\":\"CURRENCY_AMOUNT\",\"description\":\"Final appraised market value of the property\"},{\"name\":\"effective_date\",\"type\":\"DATE\",\"description\":\"Date of the appraisal\"},{\"name\":\"property_type\",\"type\":\"ENUM\",\"description\":\"Type of property\",\"values\":[\"single_family\",\"condo\",\"multi_family\",\"commercial\",\"land\"],\"max_selected\":1},{\"name\":\"gross_living_area_sqft\",\"type\":\"INTEGER\",\"description\":\"Gross living area in square feet\"},{\"name\":\"year_built\",\"type\":\"INTEGER\",\"description\":\"Year the property was built\"},{\"name\":\"bedrooms\",\"type\":\"INTEGER\",\"description\":\"Number of bedrooms\"},{\"name\":\"bathrooms\",\"type\":\"DECIMAL\",\"description\":\"Number of bathrooms\",\"decimal_points\":1},{\"name\":\"comparable_sales\",\"type\":\"ARRAY\",\"description\":\"Comparable sales used in the appraisal\",\"item_schema\":{\"fields\":[{\"name\":\"address\",\"type\":\"ADDRESS\",\"description\":\"Address of the comparable property\"},{\"name\":\"sale_price\",\"type\":\"CURRENCY_AMOUNT\",\"description\":\"Sale price of the comparable\"},{\"name\":\"sale_date\",\"type\":\"DATE\",\"description\":\"Date of the comparable sale\"},{\"name\":\"gross_living_area_sqft\",\"type\":\"INTEGER\",\"description\":\"Gross living area of the comparable in square feet\"}]}}]}",
"files": {
"fileValues": [
{
"fileInputMode": "url",
"fileName": "appraisal.pdf",
"fileUrl": "https://example.com/appraisals/2026-0042.pdf"
}
]
}
},
"type": "n8n-nodes-iterationlayer.iterationLayer",
"typeVersion": 1,
"position": [
500,
300
],
"id": "f8a9b0c1-d2e3-4567-fabc-678901234fab",
"name": "Extract Data",
"credentials": {
"iterationLayerApi": {
"id": "1",
"name": "Iteration Layer API"
}
}
}
],
"connections": {
"Manual Trigger": {
"main": [
[
{
"node": "Extract Data",
"type": "main",
"index": 0
}
]
]
}
},
"settings": {
"executionOrder": "v1"
}
}Prompt
Extract property appraisal data from the file at [file URL]. Use the extract_document tool with these fields:
- subject_address (ADDRESS): Address of the subject property being appraised
- appraised_value (CURRENCY_AMOUNT): Final appraised market value
- effective_date (DATE): Date of the appraisal
- property_type (ENUM): Type of property (single_family, condo, multi_family, commercial, land)
- gross_living_area_sqft (INTEGER): Gross living area in square feet
- year_built (INTEGER): Year the property was built
- bedrooms (INTEGER): Number of bedrooms
- bathrooms (DECIMAL): Number of bathrooms
- comparable_sales (ARRAY): Each with address (ADDRESS), sale_price (CURRENCY_AMOUNT), sale_date (DATE), gross_living_area_sqft (INTEGER)