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": "w-8ben.pdf",
"url": "https://example.com/documents/w-8ben-sample.pdf"
}
],
"schema": {
"fields": [
{
"name": "beneficial_owner_name",
"type": "TEXT",
"description": "Beneficial owner name"
},
{
"name": "country_of_citizenship",
"type": "COUNTRY",
"description": "Country of citizenship"
},
{
"name": "permanent_residence_address",
"type": "ADDRESS",
"description": "Permanent residence address"
},
{
"name": "mailing_address",
"type": "ADDRESS",
"description": "Mailing address if different"
},
{
"name": "us_tin",
"type": "TEXT",
"description": "U.S. taxpayer identification number if provided"
},
{
"name": "foreign_tin",
"type": "TEXT",
"description": "Foreign tax identifying number"
},
{
"name": "reference_number",
"type": "TEXT",
"description": "Reference number if shown"
},
{
"name": "date_of_birth",
"type": "DATE",
"description": "Date of birth"
},
{
"name": "treaty_country",
"type": "COUNTRY",
"description": "Treaty country for Part II claim"
},
{
"name": "treaty_article",
"type": "TEXT",
"description": "Treaty article and paragraph"
},
{
"name": "withholding_rate",
"type": "TEXT",
"description": "Claimed withholding rate"
},
{
"name": "is_certification_signed",
"type": "BOOLEAN",
"description": "Whether certification is signed"
}
]
}
}'Response
{
"success": true,
"data": {
"beneficial_owner_name": {
"value": "Beneficial Owner Name",
"confidence": 0.97,
"citations": [
"BENEFICIAL OWNER NAME"
]
},
"country_of_citizenship": {
"value": "DE",
"confidence": 0.97,
"citations": [
"COUNTRY OF CITIZENSHIP"
]
},
"permanent_residence_address": {
"value": {
"street": "100 Market Street",
"city": "Berlin",
"postal_code": "10115",
"country": "DE"
},
"confidence": 0.97,
"citations": [
"PERMANENT RESIDENCE ADDRESS"
]
},
"mailing_address": {
"value": {
"street": "100 Market Street",
"city": "Berlin",
"postal_code": "10115",
"country": "DE"
},
"confidence": 0.97,
"citations": [
"MAILING ADDRESS"
]
},
"us_tin": {
"value": "Us Tin",
"confidence": 0.97,
"citations": [
"US TIN"
]
},
"foreign_tin": {
"value": "Foreign Tin",
"confidence": 0.97,
"citations": [
"FOREIGN TIN"
]
},
"reference_number": {
"value": "Reference Number",
"confidence": 0.97,
"citations": [
"REFERENCE NUMBER"
]
},
"date_of_birth": {
"value": "2026-04-15",
"confidence": 0.97,
"citations": [
"15 Apr 2026"
]
},
"treaty_country": {
"value": "DE",
"confidence": 0.97,
"citations": [
"TREATY COUNTRY"
]
},
"treaty_article": {
"value": "Treaty Article",
"confidence": 0.97,
"citations": [
"TREATY ARTICLE"
]
},
"withholding_rate": {
"value": "Withholding Rate",
"confidence": 0.97,
"citations": [
"WITHHOLDING RATE"
]
},
"is_certification_signed": {
"value": true,
"confidence": 0.97,
"citations": [
"IS CERTIFICATION SIGNED"
]
}
}
}Request
import { IterationLayer } from "iterationlayer";
const client = new IterationLayer({ apiKey: "YOUR_API_KEY" });
const result = await client.extractDocument({
"files": [
{
"type": "url",
"name": "w-8ben.pdf",
"url": "https://example.com/documents/w-8ben-sample.pdf"
}
],
"schema": {
"fields": [
{
"name": "beneficial_owner_name",
"type": "TEXT",
"description": "Beneficial owner name"
},
{
"name": "country_of_citizenship",
"type": "COUNTRY",
"description": "Country of citizenship"
},
{
"name": "permanent_residence_address",
"type": "ADDRESS",
"description": "Permanent residence address"
},
{
"name": "mailing_address",
"type": "ADDRESS",
"description": "Mailing address if different"
},
{
"name": "us_tin",
"type": "TEXT",
"description": "U.S. taxpayer identification number if provided"
},
{
"name": "foreign_tin",
"type": "TEXT",
"description": "Foreign tax identifying number"
},
{
"name": "reference_number",
"type": "TEXT",
"description": "Reference number if shown"
},
{
"name": "date_of_birth",
"type": "DATE",
"description": "Date of birth"
},
{
"name": "treaty_country",
"type": "COUNTRY",
"description": "Treaty country for Part II claim"
},
{
"name": "treaty_article",
"type": "TEXT",
"description": "Treaty article and paragraph"
},
{
"name": "withholding_rate",
"type": "TEXT",
"description": "Claimed withholding rate"
},
{
"name": "is_certification_signed",
"type": "BOOLEAN",
"description": "Whether certification is signed"
}
]
}
});Response
{
"success": true,
"data": {
"beneficial_owner_name": {
"value": "Beneficial Owner Name",
"confidence": 0.97,
"citations": [
"BENEFICIAL OWNER NAME"
]
},
"country_of_citizenship": {
"value": "DE",
"confidence": 0.97,
"citations": [
"COUNTRY OF CITIZENSHIP"
]
},
"permanent_residence_address": {
"value": {
"street": "100 Market Street",
"city": "Berlin",
"postal_code": "10115",
"country": "DE"
},
"confidence": 0.97,
"citations": [
"PERMANENT RESIDENCE ADDRESS"
]
},
"mailing_address": {
"value": {
"street": "100 Market Street",
"city": "Berlin",
"postal_code": "10115",
"country": "DE"
},
"confidence": 0.97,
"citations": [
"MAILING ADDRESS"
]
},
"us_tin": {
"value": "Us Tin",
"confidence": 0.97,
"citations": [
"US TIN"
]
},
"foreign_tin": {
"value": "Foreign Tin",
"confidence": 0.97,
"citations": [
"FOREIGN TIN"
]
},
"reference_number": {
"value": "Reference Number",
"confidence": 0.97,
"citations": [
"REFERENCE NUMBER"
]
},
"date_of_birth": {
"value": "2026-04-15",
"confidence": 0.97,
"citations": [
"15 Apr 2026"
]
},
"treaty_country": {
"value": "DE",
"confidence": 0.97,
"citations": [
"TREATY COUNTRY"
]
},
"treaty_article": {
"value": "Treaty Article",
"confidence": 0.97,
"citations": [
"TREATY ARTICLE"
]
},
"withholding_rate": {
"value": "Withholding Rate",
"confidence": 0.97,
"citations": [
"WITHHOLDING RATE"
]
},
"is_certification_signed": {
"value": true,
"confidence": 0.97,
"citations": [
"IS CERTIFICATION SIGNED"
]
}
}
}Request
from iterationlayer import IterationLayer
client = IterationLayer(api_key="YOUR_API_KEY")
result = client.extract_document(**{
"files": [
{
"type": "url",
"name": "w-8ben.pdf",
"url": "https://example.com/documents/w-8ben-sample.pdf"
}
],
"schema": {
"fields": [
{
"name": "beneficial_owner_name",
"type": "TEXT",
"description": "Beneficial owner name"
},
{
"name": "country_of_citizenship",
"type": "COUNTRY",
"description": "Country of citizenship"
},
{
"name": "permanent_residence_address",
"type": "ADDRESS",
"description": "Permanent residence address"
},
{
"name": "mailing_address",
"type": "ADDRESS",
"description": "Mailing address if different"
},
{
"name": "us_tin",
"type": "TEXT",
"description": "U.S. taxpayer identification number if provided"
},
{
"name": "foreign_tin",
"type": "TEXT",
"description": "Foreign tax identifying number"
},
{
"name": "reference_number",
"type": "TEXT",
"description": "Reference number if shown"
},
{
"name": "date_of_birth",
"type": "DATE",
"description": "Date of birth"
},
{
"name": "treaty_country",
"type": "COUNTRY",
"description": "Treaty country for Part II claim"
},
{
"name": "treaty_article",
"type": "TEXT",
"description": "Treaty article and paragraph"
},
{
"name": "withholding_rate",
"type": "TEXT",
"description": "Claimed withholding rate"
},
{
"name": "is_certification_signed",
"type": "BOOLEAN",
"description": "Whether certification is signed"
}
]
}
})Response
{
"success": true,
"data": {
"beneficial_owner_name": {
"value": "Beneficial Owner Name",
"confidence": 0.97,
"citations": [
"BENEFICIAL OWNER NAME"
]
},
"country_of_citizenship": {
"value": "DE",
"confidence": 0.97,
"citations": [
"COUNTRY OF CITIZENSHIP"
]
},
"permanent_residence_address": {
"value": {
"street": "100 Market Street",
"city": "Berlin",
"postal_code": "10115",
"country": "DE"
},
"confidence": 0.97,
"citations": [
"PERMANENT RESIDENCE ADDRESS"
]
},
"mailing_address": {
"value": {
"street": "100 Market Street",
"city": "Berlin",
"postal_code": "10115",
"country": "DE"
},
"confidence": 0.97,
"citations": [
"MAILING ADDRESS"
]
},
"us_tin": {
"value": "Us Tin",
"confidence": 0.97,
"citations": [
"US TIN"
]
},
"foreign_tin": {
"value": "Foreign Tin",
"confidence": 0.97,
"citations": [
"FOREIGN TIN"
]
},
"reference_number": {
"value": "Reference Number",
"confidence": 0.97,
"citations": [
"REFERENCE NUMBER"
]
},
"date_of_birth": {
"value": "2026-04-15",
"confidence": 0.97,
"citations": [
"15 Apr 2026"
]
},
"treaty_country": {
"value": "DE",
"confidence": 0.97,
"citations": [
"TREATY COUNTRY"
]
},
"treaty_article": {
"value": "Treaty Article",
"confidence": 0.97,
"citations": [
"TREATY ARTICLE"
]
},
"withholding_rate": {
"value": "Withholding Rate",
"confidence": 0.97,
"citations": [
"WITHHOLDING RATE"
]
},
"is_certification_signed": {
"value": true,
"confidence": 0.97,
"citations": [
"IS CERTIFICATION SIGNED"
]
}
}
}Request
package main
import il "github.com/iterationlayer/sdk-go"
func main() {
client := il.NewClient("YOUR_API_KEY")
result, err := client.ExtractDocument(il.ExtractDocumentRequest{
Files: []il.FileInput{
il.FileInput{
Type: "url",
Name: "w-8ben.pdf",
Url: "https://example.com/documents/w-8ben-sample.pdf",
},
},
Schema: il.ExtractionSchema{
Fields: []any{
il.TextFieldConfig{
Name: "beneficial_owner_name",
Type: "TEXT",
Description: "Beneficial owner name",
},
il.CountryFieldConfig{
Name: "country_of_citizenship",
Type: "COUNTRY",
Description: "Country of citizenship",
},
il.AddressFieldConfig{
Name: "permanent_residence_address",
Type: "ADDRESS",
Description: "Permanent residence address",
},
il.AddressFieldConfig{
Name: "mailing_address",
Type: "ADDRESS",
Description: "Mailing address if different",
},
il.TextFieldConfig{
Name: "us_tin",
Type: "TEXT",
Description: "U.S. taxpayer identification number if provided",
},
il.TextFieldConfig{
Name: "foreign_tin",
Type: "TEXT",
Description: "Foreign tax identifying number",
},
il.TextFieldConfig{
Name: "reference_number",
Type: "TEXT",
Description: "Reference number if shown",
},
il.DateFieldConfig{
Name: "date_of_birth",
Type: "DATE",
Description: "Date of birth",
},
il.CountryFieldConfig{
Name: "treaty_country",
Type: "COUNTRY",
Description: "Treaty country for Part II claim",
},
il.TextFieldConfig{
Name: "treaty_article",
Type: "TEXT",
Description: "Treaty article and paragraph",
},
il.TextFieldConfig{
Name: "withholding_rate",
Type: "TEXT",
Description: "Claimed withholding rate",
},
il.BooleanFieldConfig{
Name: "is_certification_signed",
Type: "BOOLEAN",
Description: "Whether certification is signed",
},
},
},
})
if err != nil {
panic(err)
}
_ = result
}Response
{
"success": true,
"data": {
"beneficial_owner_name": {
"value": "Beneficial Owner Name",
"confidence": 0.97,
"citations": [
"BENEFICIAL OWNER NAME"
]
},
"country_of_citizenship": {
"value": "DE",
"confidence": 0.97,
"citations": [
"COUNTRY OF CITIZENSHIP"
]
},
"permanent_residence_address": {
"value": {
"street": "100 Market Street",
"city": "Berlin",
"postal_code": "10115",
"country": "DE"
},
"confidence": 0.97,
"citations": [
"PERMANENT RESIDENCE ADDRESS"
]
},
"mailing_address": {
"value": {
"street": "100 Market Street",
"city": "Berlin",
"postal_code": "10115",
"country": "DE"
},
"confidence": 0.97,
"citations": [
"MAILING ADDRESS"
]
},
"us_tin": {
"value": "Us Tin",
"confidence": 0.97,
"citations": [
"US TIN"
]
},
"foreign_tin": {
"value": "Foreign Tin",
"confidence": 0.97,
"citations": [
"FOREIGN TIN"
]
},
"reference_number": {
"value": "Reference Number",
"confidence": 0.97,
"citations": [
"REFERENCE NUMBER"
]
},
"date_of_birth": {
"value": "2026-04-15",
"confidence": 0.97,
"citations": [
"15 Apr 2026"
]
},
"treaty_country": {
"value": "DE",
"confidence": 0.97,
"citations": [
"TREATY COUNTRY"
]
},
"treaty_article": {
"value": "Treaty Article",
"confidence": 0.97,
"citations": [
"TREATY ARTICLE"
]
},
"withholding_rate": {
"value": "Withholding Rate",
"confidence": 0.97,
"citations": [
"WITHHOLDING RATE"
]
},
"is_certification_signed": {
"value": true,
"confidence": 0.97,
"citations": [
"IS CERTIFICATION SIGNED"
]
}
}
}Template
{
"name": "Extract W-8BEN Data",
"nodes": [
{
"parameters": {
"content": "## Extract W-8BEN Data\n\nTax and finance teams use this recipe to extract W-8BEN fields from official forms into structured JSON for review, routing, and downstream filing preparation.\n\n**Note:** This workflow uses the Iteration Layer community node (`n8n-nodes-iterationlayer`). Install it via Settings > Community Nodes on self-hosted n8n, or add it directly on n8n Cloud with Verified Community Nodes enabled.",
"height": 280,
"width": 500,
"color": 2
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
200,
40
],
"id": "extract-w-8ben-data-overview",
"name": "Overview"
},
{
"parameters": {},
"type": "n8n-nodes-base.manualTrigger",
"typeVersion": 1,
"position": [
250,
300
],
"id": "extract-w-8ben-data-trigger",
"name": "Manual Trigger"
},
{
"parameters": {
"resource": "documentExtraction",
"schemaInputMode": "rawJson",
"schemaJson": "{\n \"fields\": [\n {\n \"name\": \"beneficial_owner_name\",\n \"type\": \"TEXT\",\n \"description\": \"Beneficial owner name\"\n },\n {\n \"name\": \"country_of_citizenship\",\n \"type\": \"COUNTRY\",\n \"description\": \"Country of citizenship\"\n },\n {\n \"name\": \"permanent_residence_address\",\n \"type\": \"ADDRESS\",\n \"description\": \"Permanent residence address\"\n },\n {\n \"name\": \"mailing_address\",\n \"type\": \"ADDRESS\",\n \"description\": \"Mailing address if different\"\n },\n {\n \"name\": \"us_tin\",\n \"type\": \"TEXT\",\n \"description\": \"U.S. taxpayer identification number if provided\"\n },\n {\n \"name\": \"foreign_tin\",\n \"type\": \"TEXT\",\n \"description\": \"Foreign tax identifying number\"\n },\n {\n \"name\": \"reference_number\",\n \"type\": \"TEXT\",\n \"description\": \"Reference number if shown\"\n },\n {\n \"name\": \"date_of_birth\",\n \"type\": \"DATE\",\n \"description\": \"Date of birth\"\n },\n {\n \"name\": \"treaty_country\",\n \"type\": \"COUNTRY\",\n \"description\": \"Treaty country for Part II claim\"\n },\n {\n \"name\": \"treaty_article\",\n \"type\": \"TEXT\",\n \"description\": \"Treaty article and paragraph\"\n },\n {\n \"name\": \"withholding_rate\",\n \"type\": \"TEXT\",\n \"description\": \"Claimed withholding rate\"\n },\n {\n \"name\": \"is_certification_signed\",\n \"type\": \"BOOLEAN\",\n \"description\": \"Whether certification is signed\"\n }\n ]\n}",
"files": {
"fileValues": [
{
"fileInputMode": "url",
"fileName": "w-8ben.pdf",
"fileUrl": "https://example.com/documents/w-8ben-sample.pdf"
}
]
}
},
"type": "n8n-nodes-iterationlayer.iterationLayer",
"typeVersion": 1,
"position": [
500,
300
],
"id": "extract-w-8ben-data-extract",
"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 w-8ben data from the file at [file URL]. Use the extract_document tool with these fields:
- beneficial_owner_name (TEXT): Beneficial owner name
- country_of_citizenship (COUNTRY): Country of citizenship
- permanent_residence_address (ADDRESS): Permanent residence address
- mailing_address (ADDRESS): Mailing address if different
- us_tin (TEXT): U.S. taxpayer identification number if provided
- foreign_tin (TEXT): Foreign tax identifying number
- reference_number (TEXT): Reference number if shown
- date_of_birth (DATE): Date of birth
- treaty_country (COUNTRY): Treaty country for Part II claim
- treaty_article (TEXT): Treaty article and paragraph
- withholding_rate (TEXT): Claimed withholding rate
- is_certification_signed (BOOLEAN): Whether certification is signed