Every LMS and the integrations it supports.

A collaborative-learning LMS/LXP with an OAuth2 REST API (v2), an OpenAPI spec, and native integrations to CRM, HRIS, and content libraries.

A corporate LMS with a REST Integration API and native outbound webhooks for users, enrollments, completions, and competencies.

Adobe's enterprise LMS/LXP. JSON:API-style Prime REST API (v2) with OAuth 2.0, and a rich native webhook system covering enrollment, completion, progress, and learning-object events.

A major higher-ed LMS (now Anthology). Comprehensive REST APIs with OAuth 2.0 (two- and three-legged), LTI Advantage, and the legacy Building Blocks framework. No general native outbound webhooks.

D2L's flagship LMS for education and corporate learning. Integrates via the Valence REST API (OAuth 2.0), LTI Advantage, and a platform event/notification system.

The dominant higher-ed LMS. Extensive REST API, OAuth2, LTI 1.3 as the primary integration mechanism, and Live Events for streaming webhooks.

An enterprise talent/learning suite. RESTful Edge APIs with OAuth 2.0, a large Edge Marketplace, and an integration framework — but no native outbound webhooks for most lifecycle events (polling/Edge instead).

Enterprise learning platform with a broad REST API, native outbound webhooks, and a built-in iPaaS (Docebo Connect, powered by Workato).

Google's free LMS for Workspace for Education. Full REST API (Google OAuth2), and change notifications delivered via Google Cloud Pub/Sub rather than traditional HTTP webhooks.

A corporate LMS paired with the iSpring Suite authoring tools. OAuth REST API (with an OpenAPI 3.0.1 spec), SOAP, and subscribe-based webhooks.

An all-in-one creator platform (courses, memberships, marketing). Strong inbound + outbound webhooks and a native Zapier app; the public REST API is in beta.

The leading WordPress LMS plugin. Integrates through the WordPress REST API (ldlms namespace) and the vast WordPress plugin ecosystem; automation via Uncanny Automator and Zapier. No native first-party webhooks.

A corporate LMS with a clean REST API (Basic auth), a v2 webhooks system with a defined event catalog, and a native Zapier app.

A course-creator platform with a deep REST API (OAuth2), signed webhooks with aggressive retries, and a native Zapier app.

A corporate training LMS with a RESTful API (API-key auth, JSON or XML), pre-configured webhooks, SCIM provisioning, and a strong Salesforce integration.

The most widely deployed open-source LMS. Integrates via a token-based Web Services API (REST/SOAP/XML-RPC), LTI, and a vast plugin ecosystem. No native core webhooks.

A customer-education LMS (now Gainsight Customer Education). REST API with API-key/OAuth2 auth and a deep, signature-verified webhook catalog covering learner, course, quiz, ILT, and learning-path events.

The open-source platform behind edX. REST APIs with OAuth2/JWT, an internal event bus (openedx-events), LTI, and a large plugin ecosystem. No first-party hosted webhooks in core.

A K-12 LMS (now PowerSchool). REST API v1 with OAuth signing, plus Realtime 'Event Triggers' (webhook-style event objects). API access is gated by district admins.

A customer-education LMS. Versioned REST API with token auth, configurable webhooks with optional Basic auth/custom headers, and a Tray.io app for webhook triggers.

A cloud-based corporate LMS aimed at SMBs and employee/partner/customer training, with a full REST API and a native Zapier app.

A popular creator course platform. REST API (API-key auth, Pro plan+), webhooks for enrollment/completion/signup events (note: webhooks are unsigned), and a native Zapier app.

A creator-focused platform for selling online courses. Public REST API, HMAC-signed webhooks (REST Hooks), an OAuth-based Zapier app, and a large App Store.

An all-in-one LMS with a public OpenAPI 3.0 REST API. Uses Zapier as its primary webhook/automation layer (20+ triggers, 60+ actions).

An employee + customer learning platform (LMS + LXP). Offers a REST API and a GraphQL endpoint with admin-issued API tokens, plus a webhooks management API. Detailed API reference is in-product/admin-gated.