> ## Documentation Index > Fetch the complete documentation index at: https://docs.lmrp.uk/llms.txt > Use this file to discover all available pages before exploring further. # List CAD events > **Permission:** `cad.view`. **Access:** Browser session, or a service credential holding the permission as a scope. The append-only operational history, **oldest first**. Filter to one incident or one unit for its timeline; with no filter it is the global history from the beginning. Each event was written with an audit entry in the same transaction. Unknown query parameters are ignored. ## OpenAPI ````yaml /api-reference/openapi.json get /cad/events openapi: 3.1.0 info: title: Argus API version: 0.1.0 summary: The HTTP API behind the Argus web application. description: >- Argus is the operations platform for the UK London Mayfair ER:LC community. This document describes the API its own web application uses. **This is an internal application API.** It is not a stable public API: paths, fields and behaviour can change with any release, there is no versioning, and browser requests are tied to the application's own origin. Scoped service credentials exist for the community's own integrations. All paths are relative to `/api` on the deployment's origin. Responses are JSON, never cacheable, and carry an `X-Request-Id` header. servers: - url: http://localhost:3000/api description: Local development - url: '{origin}/api' description: A deployment. `origin` is that deployment's `APP_URL`. variables: origin: default: https://argus.example.org description: The application's public origin, with no trailing slash. security: [] tags: - name: Authentication description: >- Discord sign-in, Roblox account linking, the current user, and temporary Developer Access. - name: CAD Incidents description: >- Control's incidents: creation, editing, closure, and dispatching units to them. - name: CAD Units description: Control's view of operational units and their crew. - name: CAD Calls description: Incoming calls and how they become, or join, incidents. - name: CAD Events description: The append-only operational history. - name: MDT description: >- Self-service for the people crewing a unit: booking on and off, joining a unit, and changing its status. - name: Civilians description: 'The civilian portal: a member''s own characters, licences and vehicles.' - name: PNC Lookup description: >- Searching people and vehicles, full records, record history and official vehicle status. - name: PNC Licences description: Official changes to driving licences. - name: PNC Records description: Official records attached to people. - name: PNC Warrants description: Warrants and their lifecycle. - name: PNC Markers description: Markers and BOLOs on people and vehicles. - name: Staff description: Staff profiles and role membership. - name: Shifts description: Staff shifts. - name: Sessions description: Operational roleplay sessions. - name: Moderation description: Warnings, kicks and bans, with their delivery state. - name: Audit description: The append-only audit log. - name: Administration description: Accounts, roles and service credentials. - name: ERLC x-displayName: ER:LC description: Live data from the ER:LC private server. paths: /cad/events: get: tags: - CAD Events summary: List CAD events description: >- **Permission:** `cad.view`. **Access:** Browser session, or a service credential holding the permission as a scope. The append-only operational history, **oldest first**. Filter to one incident or one unit for its timeline; with no filter it is the global history from the beginning. Each event was written with an audit entry in the same transaction. Unknown query parameters are ignored. operationId: listCadEvents parameters: - name: incidentId in: query required: false schema: $ref: '#/components/schemas/Id' description: Events for this incident. - name: unitId in: query required: false schema: $ref: '#/components/schemas/Id' description: Events for this unit. - $ref: '#/components/parameters/Limit' - $ref: '#/components/parameters/Offset' responses: '200': description: Success. headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: type: object properties: data: type: array items: $ref: '#/components/schemas/CadEvent' meta: $ref: '#/components/schemas/PageMeta' required: - data - meta example: data: - id: cmg5z5evt000el508evt00001 sequence: 318 type: UNIT_ASSIGNED incidentId: cmg5z1inc0009l508inc00001 unitId: cmg5z2unt000al508unt00001 callId: null auditId: cmg5y5aud0008l508aud00001 detail: callsign: MO12 from: AVAILABLE to: ASSIGNED createdAt: '2026-10-06T19:42:10.000Z' actor: Dana Dispatcher meta: limit: 25 offset: 0 hasMore: false '400': description: >- `INVALID_INPUT`: a parameter or body field fails validation; `details` lists each problem. headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: INVALID_INPUT message: Request validation failed. details: - path: - incidentId message: Invalid input requestId: 3f1c9d5e-7a42-4f0b-9c1e-8b6d2a4e5f70 '401': $ref: '#/components/responses/Unauthenticated' '403': description: |- `FORBIDDEN`: the caller lacks `cad.view`. `ACCOUNT_DISABLED`: the account is suspended or disabled. headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: FORBIDDEN message: 'Permission required: cad.view.' requestId: 3f1c9d5e-7a42-4f0b-9c1e-8b6d2a4e5f70 '429': $ref: '#/components/responses/RateLimited' default: $ref: '#/components/responses/UnexpectedError' security: - sessionCookie: [] - serviceCredential: [] components: schemas: Id: type: string minLength: 1 maxLength: 64 pattern: ^[a-zA-Z0-9_-]+$ description: Argus record identifier. CadEvent: type: object properties: id: $ref: '#/components/schemas/Id' sequence: type: integer description: Global ordering of CAD events. type: type: string enum: - UNIT_BOOKED_ON - CREW_JOINED - CREW_LEFT - UNIT_BOOKED_OFF - INCIDENT_CREATED - INCIDENT_UPDATED - PRIORITY_CHANGED - INCIDENT_CLOSED - INCIDENT_REOPENED - UNIT_CREATED - UNIT_UPDATED - UNIT_ASSIGNED - UNIT_REMOVED - UNIT_STATUS_CHANGED - CALL_RECORDED - CALL_ATTACHED - CALL_RESOLVED incidentId: anyOf: - $ref: '#/components/schemas/Id' - type: 'null' unitId: anyOf: - $ref: '#/components/schemas/Id' - type: 'null' callId: anyOf: - $ref: '#/components/schemas/Id' - type: 'null' auditId: $ref: '#/components/schemas/Id' detail: type: object description: Event-specific data such as previous and new values. createdAt: type: string format: date-time actor: type: string description: >- Display name of the user, name of the service credential, or `System`. required: - id - sequence - type - incidentId - unitId - callId - auditId - detail - createdAt - actor PageMeta: type: object properties: limit: type: integer offset: type: integer hasMore: type: boolean description: Whether another page exists after this one. required: - limit - offset - hasMore Error: type: object properties: error: type: object properties: code: type: string description: Stable machine-readable code. message: type: string details: description: >- Present on some errors. Validation failures carry an array of `{path, message}`; ER:LC failures carry `{availability: "unavailable"}`. required: - code - message requestId: type: string format: uuid description: >- Also sent as the `X-Request-Id` header. Quote it when reporting a problem. required: - error - requestId parameters: Limit: name: limit in: query required: false schema: type: integer minimum: 1 maximum: 100 default: 25 description: Page size. Offset: name: offset in: query required: false schema: type: integer minimum: 0 maximum: 10000 default: 0 description: Number of items to skip. headers: RequestId: schema: type: string format: uuid description: Identifies this request in server logs. RetryAfter: schema: type: integer minimum: 1 description: Seconds to wait before trying again. responses: Unauthenticated: description: >- `UNAUTHENTICATED`: no session cookie, or an invalid, expired or revoked service credential. `SESSION_EXPIRED`: the session has ended. headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: UNAUTHENTICATED message: Sign in to continue. requestId: 3f1c9d5e-7a42-4f0b-9c1e-8b6d2a4e5f70 RateLimited: description: >- `RATE_LIMITED`: more than 180 reads or 60 writes in a minute for this caller. headers: X-Request-Id: $ref: '#/components/headers/RequestId' Retry-After: $ref: '#/components/headers/RetryAfter' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: RATE_LIMITED message: Too many requests. requestId: 3f1c9d5e-7a42-4f0b-9c1e-8b6d2a4e5f70 UnexpectedError: description: >- Any other failure, in the same error envelope: `INTERNAL_ERROR` (500), `METHOD_NOT_ALLOWED` (405), `BODY_TOO_LARGE` (413, over 16 KiB) or `UNSUPPORTED_MEDIA_TYPE` (415, body not sent as `application/json`). headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: INTERNAL_ERROR message: The request could not be completed. requestId: 3f1c9d5e-7a42-4f0b-9c1e-8b6d2a4e5f70 securitySchemes: sessionCookie: type: apiKey in: cookie name: __Host-argus-session description: >- The opaque session cookie set by Discord sign-in. Named `argus-session` outside production. HttpOnly, so scripts cannot read it; same-origin requests send it automatically. Requests other than GET must also carry an `Origin` header equal to the application's own origin. serviceCredential: type: http scheme: bearer bearerFormat: argus_ followed by 43 URL-safe characters description: >- A scoped credential issued by an administrator for the community's own integrations. Its scopes are permission keys. It expires within 90 days, can be revoked, and cannot call endpoints that need a signed-in user. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.