LEXGO SIGN API
Sign inside your product
Pay for what you use
Add simple and advanced signature with your brand
Your team builds the product; the signature layer is already done.
No minimums • No setup • FES (simple electronic signature) and FEA (advanced electronic signature)
For teams that add signature to their product
Fintech and factoring
SaaS platforms
Regulated entities
ONE FLOW, FOUR STEPS
From the document to the evidence
Prepare documents, signers, and positions in a single request.
POST/v1/envelopes
- 1curl -X POST https://api.lexgo.cl/v1/envelopes \
- 2 -H "Authorization: lx_test_xxxxxxxx" \
- 3 -F "name=Contrato de servicios - Acme Ltda." \
- 4 -F "documents[0][base64]=JVBERi0xLjQKJeLj..." \
- 5 -F "documents[0][name]=contrato-de-servicios.pdf" \
- 6 -F "recipients[0][name]=Ana Rojas" \
- 7 -F "recipients[0][email]=ana.rojas@example.com" \
- 8 -F "recipients[0][order]=1" \
- 9 -F "placements[0][document_key]=0" \
- 10 -F "placements[0][recipient_key]=0" \
- 11 -F "placements[0][type]=SIGNATURE" \
- 12 -F "placements[0][coordinates][page]=0" \
- 13 -F "placements[0][coordinates][top]=650" \
- 14 -F "placements[0][coordinates][left]=100" \
- 15 -F "metadata[customer_id]=customer-123" \
- 16 -F "metadata[cost_center]=sales" \
- 17 -F "metadata[reference]=invoice-456" \
- 18 -F "metadata[contract][id]=C-2026-0042"
Response 200
- 19{
- 20 "envelope": {
- 21 "id": "abc-123-def-456",
- 22 "name": "Contrato de servicios - Acme Ltda.",
- 23 "status": "CREATED",
- 24 "created_at": "2024-01-15T10:30:00Z",
- 25 "recipients": [
- 26 {
- 27 "id": "signer-001",
- 28 "name": "Ana Rojas",
- 29 "email": "ana.rojas@example.com",
- 30 "order": 1,
- 31 "status": "CREATED"
- 32 }
- 33 ],
- 34 "metadata": {
- 35 "customer_id": "customer-123",
- 36 "cost_center": "sales",
- 37 "reference": "invoice-456",
- 38 "contract": { "id": "C-2026-0042" }
- 39 }
- 40 },
- 41 "request_id": "req-abc123"
- 42}
Document
Signer
Signature positionIllustrative exampleReplace the sample key and PDF.
Your team builds the product.
The signature layer is ready
Sending, signing, and evidence from a single integration.
Explore the integration
- Simple and advanced signatureFES (simple electronic signature) and FEA (advanced electronic signature) from one provider. FEA (advanced electronic signature) in Chile only.
- Parallel or in orderAll at once, or one by one.
- Several documents per envelopeGroup documents and signers.
- Written, drawn, or with an imageThe signer chooses how to sign.
- More than 20 webhook eventsSent, opened, signed, rejected, bounced, and more.
- Email verification includedA second factor at no extra cost.
- Biometric validationAdd-on: identity document and liveness check.
- Per-account configurationDefault values, changeable on each envelope.
Your brand, end to end.
Customize the logo, colors, domain, and sender. Sign from a computer or a phone.
Emails
Signing page
Evidence
Want to review the security and the evidence?
Shall we integrate it into your product?
Let's review your flow with the technical team.