Lawfficient API

Versioning

Select an API version with the dated Lawfficient-Version header.

The API is versioned by header, not by path: the URL stays /api/leads forever, and a dated Lawfficient-Version header selects the version (the same approach Stripe uses).

curl https://app.lawfficient.com/api/leads \
  -H "Authorization: Bearer $LAWFFICIENT_API_KEY" \
  -H "Lawfficient-Version: 2026-07-01"
  • Format: an ISO date, YYYY-MM-DD. The current stable version is 2026-07-01.
  • Omitted: requests with no version header resolve to the latest stable version.
  • Echoed: every response includes the resolved Lawfficient-Version header, so you can see exactly which version served your request.

Pin a version in production. Breaking changes ship as a new dated version; existing versions keep their behavior so your integration doesn't change under you.

Authentication

Authenticate requests with a per firm API key sent as a Bearer token.

Pagination

List endpoints page with an opaque cursor.