APIs

Internal API

REST Endpoints (/api/*)

Used by the frontend for all operations:

Note Operations:

• GET /api/notes/:noteId - Get note
• POST /api/notes/:noteId/content - Update content
• PUT /api/notes/:noteId - Update metadata
• DELETE /api/notes/:noteId - Delete note

Tree Operations:

• GET /api/tree - Get note tree
• POST /api/branches - Create branch
• PUT /api/branches/:branchId - Update branch
• DELETE /api/branches/:branchId - Delete branch

Search:

• GET /api/search?query=... - Search notes
• GET /api/search-note/:noteId - Execute search note

ETAPI (External API)

Located at: apps/server/src/etapi/

Purpose: Third-party integrations and automation

Authentication: Token-based (ETAPI tokens)

OpenAPI Spec: Auto-generated

Key Endpoints:

• /etapi/notes - Note CRUD
• /etapi/branches - Branch management
• /etapi/attributes - Attribute operations
• /etapi/attachments - Attachment handling

Example:

curl -H "Authorization: YOUR_TOKEN" \
  https://trilium.example.com/etapi/notes/noteId

WebSocket API

Located at: apps/server/src/services/ws.ts

Purpose: Real-time updates and synchronization

Protocol: WebSocket (Socket.IO-like custom protocol)

Message Types:

• sync - Synchronization request
• entity-change - Entity update notification
• refresh-tree - Tree structure changed
• open-note - Open note in UI

Client Subscribe:

ws.subscribe('entity-change', (data) => {
    froca.processEntityChange(data)
})