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OpenInsure

Document Generation

The @openinsure/documents package generates all insurance documents as HTML (rendered to PDF via browser capture) and manages the full document lifecycle from generation through e-signature and archival.

Supported Document Types

Section titled “Supported Document Types”

Policy Documents

Declarations page, policy jacket, endorsement certificate, binder

Sales & Quotes

Quote proposal, premium indication letter, coverage comparison

Certificates

Certificate of Insurance (COI / ACORD 25), MCS-90 motor carrier certificate

Billing

Invoice, installment schedule, check (disbursement)

Claims

Reservation of rights letter, coverage denial, settlement agreement, proof of loss

Compliance

Notice of Cancellation (NOC), non-renewal notice, loss run, bordereaux report

Document Builders

Section titled “Document Builders”

Every document type has a typed builder function that accepts structured data and returns HTML:

import {
  buildQuoteHTML,
  buildCOIHTML,
  buildNOCHTML,
  buildDecPageHTML,
  buildEndorsementHTML,
  buildSettlementHTML,
  buildLossRunHTML,
} from '@openinsure/documents';

Example — Certificate of Insurance

Section titled “Example — Certificate of Insurance”
const html = buildCOIHTML({
  insuredName: 'Acme Roofing LLC',
  policyNumber: 'GL-2025-000001',
  effectiveDate: '2025-06-01',
  expirationDate: '2026-06-01',
  insurer: 'Vermont Mutual Insurance',
  coverages: [
    { type: 'General Liability', occurrence: 1_000_000, aggregate: 2_000_000 },
    { type: 'Products & Completed Ops', aggregate: 2_000_000 },
  ],
  certificateHolder: {
    name: 'Vermont DOT',
    address: '219 North Main St, Barre, VT 05641',
  },
  additionalInsured: true,
  producerName: 'Mountain Insurance Agency',
});

Example — Quote Proposal

Section titled “Example — Quote Proposal”
const html = buildQuoteHTML({
  submission,
  ratingAudit, // full factor waterfall from the rating engine
  validUntil: '2025-07-01',
  producerName: 'Mountain Insurance Agency',
  uwName: 'Michael Chen',
});

PDF Rendering

Section titled “PDF Rendering”

Documents are rendered to PDF using the Cloudflare Browser binding (BROWSER in wrangler.toml). The renderHTMLToPDF() utility:

  1. Launches a headless Chromium instance via the Browser binding
  2. Loads the HTML with the OpenInsure document CSS
  3. Captures a print-media PDF at A4 / US Letter
  4. Streams the result to R2
import { renderHTMLToPDF } from '../lib/pdf-renderer';


const pdfBuffer = await renderHTMLToPDF(html, { format: 'Letter', margin: '0.5in' });
await env.DOCUMENTS.put(`policies/${policyId}/dec-page.pdf`, pdfBuffer);

E-Signature (Documenso)

Section titled “E-Signature (Documenso)”

OpenInsure uses a self-hosted Documenso instance (openinsure-documenso.fly.dev) for e-signature workflows. Documenso is configured via ESIGN_PROVIDER=documenso in wrangler.toml.

Signing workflow

Section titled “Signing workflow”
  1. Document is generated as a PDF and uploaded to Documenso via the API 2. Signing fields are placed programmatically (producer signature, insured signature, date) 3. Signatories receive an email with a one-click signing link (no account required) 4. On completion, the signed PDF is stored in R2 and the policy/submission record is updated 5. All parties receive a signed copy by email

API

Section titled “API”
Terminal window
POST /v1/documents/:id/request-signature
Authorization: Bearer <token>
Content-Type: application/json


{
  "documentType": "binder",
  "signatories": [
    { "name": "Jane Smith", "email": "jane@acme.com", "role": "insured" },
    { "name": "Mountain Insurance Agency", "email": "agent@mountain.com", "role": "producer" }
  ],
  "redirectUrl": "https://portal.openinsure.dev/policies/{id}?signed=true"
}
Terminal window
GET /v1/documents/:id/signature-status
# Returns: { status: "pending" | "completed" | "declined", signatories: [...] }

Export Utilities

Section titled “Export Utilities”

Beyond PDFs, the documents package provides tabular exports:

import { exportToCSV, exportToExcel } from '@openinsure/documents';


// Loss run CSV for underwriting
const csv = exportToCSV(lossRunRows, {
  columns: ['claimNumber', 'dateOfLoss', 'status', 'totalIncurred'],
  filename: 'loss-run-2025.csv',
});


// Bordereaux Excel workbook for carrier submission
const xlsx = await exportToExcel(bordereaux, {
  sheets: ['Premium', 'Claims', 'Summary'],
});

Storage

Section titled “Storage”

All generated documents are stored in the oi-documents R2 bucket bound as DOCUMENTS in wrangler.toml. The key schema is:

policies/{policyId}/dec-page.pdf
policies/{policyId}/endorsements/{endorsementId}.pdf
policies/{policyId}/coi/{coiId}.pdf
claims/{claimId}/settlement-agreement.pdf
submissions/{submissionId}/quote-proposal.pdf

Documents are served through the API at:

GET /v1/documents/{documentId}/download

Presigned R2 URLs with 24-hour expiry are returned for direct download without proxying through the Worker.

Adding a New Document Type

Section titled “Adding a New Document Type”
  1. Create src/builders/{document - type}.ts — returns HTML string 2. Export from src/index.ts
  2. Add a route in apps/api/src/routes/documents.ts that calls the builder and stores the result
  3. Add the document type to the documentType enum in packages/types 5. Write tests in src/__tests__/ using snapshot testing (compare generated HTML to fixture)