Skills extract-multi-invoice-data
Extract structured data from multiple invoice files in a single API call using an array schema.
install
source · Clone the upstream repo
git clone https://github.com/iterationlayer/skills
Claude Code · Install into ~/.claude/skills/
T=$(mktemp -d) && git clone --depth=1 https://github.com/iterationlayer/skills "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/extract-multi-invoice-data" ~/.claude/skills/iterationlayer-skills-extract-multi-invoice-data && rm -rf "$T"
manifest:
skills/extract-multi-invoice-data/SKILL.mdsource content
Extract Multi-Invoice Data
Accounts payable teams and finance platforms use this recipe to process many invoices at once. Pass multiple invoice files and define an array schema to extract each invoice's vendor, date, line items, and total — ready for import into your accounting system.
APIs Used
Document Extraction (1 credit per page)
Prerequisites
You need an Iteration Layer API key. Get one at platform.iterationlayer.com — free trial credits included, no credit card required.
For full integration guidance (SDKs, auth, MCP, error handling), see the Iteration Layer Integration Guide.
Implementation
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": "invoice-acme.pdf", "url": "https://example.com/invoices/invoice-acme.pdf" }, { "type": "url", "name": "invoice-global-freight.pdf", "url": "https://example.com/invoices/invoice-global-freight.pdf" } ], "schema": { "fields": [ { "name": "invoices", "type": "ARRAY", "description": "One entry per invoice file", "fields": [ { "name": "vendor_name", "type": "TEXT", "description": "Vendor or supplier name" }, { "name": "invoice_number", "type": "TEXT", "description": "Invoice reference number" }, { "name": "invoice_date", "type": "DATE", "description": "Invoice date" }, { "name": "line_items", "type": "ARRAY", "description": "Individual line items", "fields": [ { "name": "description", "type": "TEXT", "description": "Item description" }, { "name": "quantity", "type": "TEXT", "description": "Quantity ordered" }, { "name": "amount", "type": "CURRENCY_AMOUNT", "description": "Line item amount" } ] }, { "name": "total_amount", "type": "CURRENCY_AMOUNT", "description": "Total invoice amount" } ] } ] } }'
import { IterationLayer } from "iterationlayer"; const client = new IterationLayer({ apiKey: "YOUR_API_KEY" }); const result = await client.extract({ files: [ { type: "url", name: "invoice-acme.pdf", url: "https://example.com/invoices/invoice-acme.pdf", }, { type: "url", name: "invoice-global-freight.pdf", url: "https://example.com/invoices/invoice-global-freight.pdf", }, ], schema: { fields: [ { name: "invoices", type: "ARRAY", description: "One entry per invoice file", fields: [ { name: "vendor_name", type: "TEXT", description: "Vendor or supplier name", }, { name: "invoice_number", type: "TEXT", description: "Invoice reference number", }, { name: "invoice_date", type: "DATE", description: "Invoice date", }, { name: "line_items", type: "ARRAY", description: "Individual line items", fields: [ { name: "description", type: "TEXT", description: "Item description", }, { name: "quantity", type: "TEXT", description: "Quantity ordered", }, { name: "amount", type: "CURRENCY_AMOUNT", description: "Line item amount", }, ], }, { name: "total_amount", type: "CURRENCY_AMOUNT", description: "Total invoice amount", }, ], }, ], }, });
from iterationlayer import IterationLayer client = IterationLayer(api_key="YOUR_API_KEY") result = client.extract( files=[ { "type": "url", "name": "invoice-acme.pdf", "url": "https://example.com/invoices/invoice-acme.pdf", }, { "type": "url", "name": "invoice-global-freight.pdf", "url": "https://example.com/invoices/invoice-global-freight.pdf", }, ], schema={ "fields": [ { "name": "invoices", "type": "ARRAY", "description": "One entry per invoice file", "fields": [ { "name": "vendor_name", "type": "TEXT", "description": "Vendor or supplier name", }, { "name": "invoice_number", "type": "TEXT", "description": "Invoice reference number", }, { "name": "invoice_date", "type": "DATE", "description": "Invoice date", }, { "name": "line_items", "type": "ARRAY", "description": "Individual line items", "fields": [ { "name": "description", "type": "TEXT", "description": "Item description", }, { "name": "quantity", "type": "TEXT", "description": "Quantity ordered", }, { "name": "amount", "type": "CURRENCY_AMOUNT", "description": "Line item amount", }, ], }, { "name": "total_amount", "type": "CURRENCY_AMOUNT", "description": "Total invoice amount", }, ], }, ] }, )
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( "invoice-acme.pdf", "https://example.com/invoices/invoice-acme.pdf", ), il.NewFileFromURL( "invoice-global-freight.pdf", "https://example.com/invoices/invoice-global-freight.pdf", ), }, Schema: il.ExtractionSchema{ "invoices": il.NewArrayFieldConfig( "invoices", "One entry per invoice file", []il.FieldConfig{ il.NewTextFieldConfig( "vendor_name", "Vendor or supplier name", ), il.NewTextFieldConfig( "invoice_number", "Invoice reference number", ), il.NewDateFieldConfig( "invoice_date", "Invoice date", ), il.NewArrayFieldConfig( "line_items", "Individual line items", []il.FieldConfig{ il.NewTextFieldConfig( "description", "Item description", ), il.NewTextFieldConfig( "quantity", "Quantity ordered", ), il.NewCurrencyAmountFieldConfig( "amount", "Line item amount", ), }, ), il.NewCurrencyAmountFieldConfig( "total_amount", "Total invoice amount", ), }, ), }, }) if err != nil { panic(err) } }
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Extract data from multiple invoices at [file URL 1] and [file URL 2]. Use the extract_document tool with these fields: - invoices (ARRAY): One entry per invoice file, each with: - vendor_name (TEXT): Vendor or supplier name - invoice_number (TEXT): Invoice reference number - invoice_date (DATE): Invoice date - line_items (ARRAY): Each with description (TEXT), quantity (TEXT), amount (CURRENCY_AMOUNT) - total_amount (CURRENCY_AMOUNT): Total invoice amount
Response
{ "success": true, "data": { "invoices": { "value": [ { "vendor_name": { "value": "Acme Office Supplies Ltd.", "confidence": 0.97, "citations": ["Acme Office Supplies Ltd."], "source": "invoice-acme.pdf" }, "invoice_number": { "value": "INV-2026-0041", "confidence": 0.99, "citations": ["Invoice #INV-2026-0041"], "source": "invoice-acme.pdf" }, "invoice_date": { "value": "2026-03-01", "confidence": 0.98, "citations": ["Date: March 1, 2026"], "source": "invoice-acme.pdf" }, "line_items": { "value": [ { "description": { "value": "Ergonomic Desk Chair", "confidence": 0.96, "citations": ["Ergonomic Desk Chair"] }, "quantity": { "value": "2", "confidence": 0.98, "citations": ["Qty: 2"] }, "amount": { "value": { "amount": "699.98", "currency": "USD" }, "confidence": 0.97, "citations": ["$699.98"] } }, { "description": { "value": "Standing Desk Converter", "confidence": 0.95, "citations": ["Standing Desk Converter"] }, "quantity": { "value": "1", "confidence": 0.99, "citations": ["Qty: 1"] }, "amount": { "value": { "amount": "189.00", "currency": "USD" }, "confidence": 0.96, "citations": ["$189.00"] } } ], "confidence": 0.96, "citations": [] }, "total_amount": { "value": { "amount": "888.98", "currency": "USD" }, "confidence": 0.98, "citations": ["Total Due: $888.98"], "source": "invoice-acme.pdf" } }, { "vendor_name": { "value": "Global Freight Solutions", "confidence": 0.96, "citations": ["Global Freight Solutions"], "source": "invoice-global-freight.pdf" }, "invoice_number": { "value": "GFS-90215", "confidence": 0.99, "citations": ["Invoice No. GFS-90215"], "source": "invoice-global-freight.pdf" }, "invoice_date": { "value": "2026-03-03", "confidence": 0.97, "citations": ["Date: 03/03/2026"], "source": "invoice-global-freight.pdf" }, "line_items": { "value": [ { "description": { "value": "Overnight Parcel Shipping (5 kg)", "confidence": 0.94, "citations": ["Overnight Parcel Shipping (5 kg)"] }, "quantity": { "value": "3", "confidence": 0.98, "citations": ["Qty: 3"] }, "amount": { "value": { "amount": "134.85", "currency": "USD" }, "confidence": 0.95, "citations": ["$134.85"] } }, { "description": { "value": "Pallet Freight (LTL, 200 kg)", "confidence": 0.93, "citations": ["Pallet Freight (LTL, 200 kg)"] }, "quantity": { "value": "1", "confidence": 0.99, "citations": ["Qty: 1"] }, "amount": { "value": { "amount": "420.00", "currency": "USD" }, "confidence": 0.96, "citations": ["$420.00"] } } ], "confidence": 0.95, "citations": [] }, "total_amount": { "value": { "amount": "554.85", "currency": "USD" }, "confidence": 0.97, "citations": ["Total: $554.85"], "source": "invoice-global-freight.pdf" } } ], "confidence": 0.96, "citations": [] } } }