Integrations

Connect your CRM, HR or ERP system

A REST API and signed webhooks let other systems create agreements, send offers and look up everything signed with a given person or customer. Link each document to your own record IDs and get notified the moment something is signed, declined or about to expire.

REST API

Create, send, fetch

Every template you publish is available through the API. Post the values and the party, and NextSigner renders the PDF, sends the signing link and returns the document with its status.

  • Create and send documents from your CRM
  • Pull signed PDFs into your HR or ERP archive
  • Look up every document for a person or customer by your own reference
  • Workspace API keys with scoped permissions
POST /api/v1/documents
Authorization: Bearer ns_live_•••

{
  "template": "employment-contract",
  "external_ref": "crm-contact-48213",
  "party": { "name": "Maria Fernández", "email": "maria@example.com" },
  "values": { "start_date": "2026-10-01", "salary": 4200 }
}

201 Created
{ "status": "sent", "sign_url": "https://nextsigner.com/sign/kX92…" }

Endpoints

  • •GET /api/v1/templates
  • •GET|POST /api/v1/parties
  • •GET|POST /api/v1/documents
  • •POST /api/v1/documents/{id}/send
  • •GET /api/v1/documents/{id}/pdf

Webhook events

  • •document.sent
  • •document.viewed
  • •document.signed
  • •document.declined
  • •document.expiring
  • •document.expired

Security

  • •Per-workspace API keys
  • •Scoped permissions per key
  • •HMAC-signed webhook payloads
  • •Automatic retries with backoff
  • •Full request log in the dashboard
Typical flow

From a won deal to a signed contract

When a deal is marked won in your CRM, your integration posts the customer and the agreed values to NextSigner. The customer signs, the webhook fires, and the signed PDF lands back on the deal. No copy and paste, no missing signatures.

  1. 1 Deal won in CRM
  2. 2 POST /documents with external_ref
  3. 3 Customer signs on their phone
  4. 4 document.signed webhook received
  5. 5 PDF fetched and attached to the deal

Get your API key today

API access is included in every plan. Create a workspace, generate a key and send your first document in minutes.

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