openapi: 3.2.0 info: title: Lawmatics OAuth Custom Emails API version: 1.22.0 description: 'The official Lawmatics REST API for legal CRM, client intake and law firm automation. Manage matters (prospects), contacts, companies, custom forms and form entries, custom fields, events and appointments, tasks, notes, files, tags, users, time entries, expenses, invoices and transactions. Authentication is OAuth 2.0 authorization code grant; access tokens do not expire, there are no refresh tokens, and Lawmatics does not currently support scopes - an authorized app receives full CRUD access to the granted account. All list endpoints support the shared query-parameter grammar documented in the Param Guide: `fields` (field selection, one level deep, `fields=all` to expand), `page` (pagination), `sort_by`/`sort_order`, and `filter_by`/`filter_on`/`filter_with` (one filter at a time; operators `=`, `!=`, `<=`, `<`, `>=`, `>`, `like`, `ilike`, `null`, `not_null`). Responses follow a JSON:API-style `data` / `attributes` / `relationships` envelope.' contact: name: Lawmatics API Support email: api@lawmatics.com url: https://docs.lawmatics.com/ termsOfService: https://www.lawmatics.com/terms-of-use servers: - url: https://api.lawmatics.com description: Lawmatics production API security: - oauth2: [] - bearerAuth: [] tags: - name: Custom Emails paths: /v1/custom_emails/{custom_email_id}: get: operationId: getCustomEmail summary: Custom Email description: A specific custom email by id showcasing the custom email statistics such as unique open count, send count, bounce count, open rate, send rate, and bounce rate. tags: - Custom Emails parameters: - name: custom_email_id in: path required: true description: The custom email id schema: type: string responses: default: description: Example response captured in the source Postman collection; the HTTP status code was not recorded by the publisher. content: application/json: schema: type: object examples: getCustomEmail: summary: GET Custom Email value: data: id: '24' type: custom_email attributes: name: Welcome Email subject: Welcome! opens: 80 sends: 334 bounces: 8 clicks: 58 open_rate: 0.23952095808383234 click_rate: 0.017964071856287425 bounce_rate: 0.1467065868263473 delivered_rate: 0.7994011976047904 promotional: true created_at: '2023-06-29T15:04:44.943-07:00' updated_at: '2023-06-29T15:04:44.943-07:00' '401': description: Unauthorized - missing or invalid OAuth 2.0 bearer token '429': description: Too Many Requests - the per-firm rate limit was exceeded; a Retry-After header is returned headers: Retry-After: description: Seconds to wait before retrying schema: type: integer /v1/custom_emails: get: operationId: getCustomEmails summary: Custom Emails description: A list of all custom emails in Lawmatics. tags: - Custom Emails responses: default: description: Example response captured in the source Postman collection; the HTTP status code was not recorded by the publisher. content: application/json: schema: type: object examples: getCustomEmails: summary: GET Custom Emails value: data: - id: '24' type: custom_email attributes: name: Welcome Email subject: Welcome! opens: 80 sends: 334 bounces: 8 clicks: 58 open_rate: 0.23952095808383234 click_rate: 0.017964071856287425 bounce_rate: 0.1467065868263473 delivered_rate: 0.7994011976047904 promotional: true created_at: '2023-06-29T15:04:44.943-07:00' updated_at: '2023-06-29T15:04:44.943-07:00' - id: '1' type: custom_email attributes: name: onboarding email subject: Thank you for Reaching out! opens: null sends: null bounces: null clicks: null open_rate: null click_rate: null bounce_rate: null delivered_rate: null promotional: false created_at: '2023-02-13T10:06:44.671-08:00' updated_at: '2023-02-13T10:06:44.671-08:00' meta: total_pages: 1 limit_per_page: 25 total_entries: 2 links: self: /v1/custom_emails?page=1 '401': description: Unauthorized - missing or invalid OAuth 2.0 bearer token '429': description: Too Many Requests - the per-firm rate limit was exceeded; a Retry-After header is returned headers: Retry-After: description: Seconds to wait before retrying schema: type: integer components: securitySchemes: oauth2: type: oauth2 description: OAuth 2.0 authorization code grant. Register a developer app at https://app.lawmatics.com/settings/developers (developer settings must be enabled by Lawmatics support). Access tokens are non-expiring; no refresh tokens are issued and scopes are not supported. flows: authorizationCode: authorizationUrl: https://app.lawmatics.com/oauth/authorize tokenUrl: https://api.lawmatics.com/oauth/token scopes: {} bearerAuth: type: http scheme: bearer description: 'The OAuth 2.0 access token is sent as `Authorization: Bearer `.' externalDocs: description: Official Lawmatics RESTful API documentation (Postman) url: https://docs.lawmatics.com/ x-provenance: generated: '2026-08-13' method: derived publisher: API Evangelist source: https://docs.lawmatics.com/api/collections/26379991/2sA3JM7gbw?segregateAuth=true&versionTag=latest source_type: Postman collection published by Lawmatics as its official API documentation source_file: postman/lawmatics-oauth-api.postman_collection.json note: 'NOT published by Lawmatics. Lawmatics publishes no OpenAPI. Every path, method, parameter, request example and response example in this document was converted mechanically from the provider-published Postman collection "Lawmatics OAuth API v1.22.0"; nothing was invented. Schemas are typed as generic objects because the collection carries examples, not JSON Schema. The server URL is the base documented in the collection Param Guide (https://api.lawmatics.com), not the collection''s disabled {{host}} placeholder. The 401 and 429 responses added to every authenticated operation are the provider-documented, globally applicable responses: the collection''s auth guide states a per-firm rate limit applies to all endpoints and returns 429 with a Retry-After header, and https://api.lawmatics.com/v1/contacts was observed returning 401 unauthenticated on 2026-08-13.'