> ## Documentation Index > Fetch the complete documentation index at: https://docs.engini.ai/llms.txt > Use this file to discover all available pages before exploring further. # List trigger types > Returns the trigger types available to the caller across all applications (or one, when applicationSlug is supplied), honoring the optional search filter and pagination. A trigger type whose connector cannot currently be subscribed to (no lifecycle workflows to back a realtime subscription) is omitted rather than listed with a broken contract - see GET .../triggers/types/{triggerSlug} for the corresponding 404. ## OpenAPI ````yaml /api-reference/openapi.json get /v1/triggers/types openapi: 3.0.0 info: title: Engini DeveloperAPI version: v1 description: 'Merged public developer API spec: Identity + WorkflowApi.' servers: - url: https://api.engini.io security: - Bearer: [] - ApiKey: [] tags: - name: Auth description: Identify the caller a Developer API request is authenticated as. - name: Applications description: >- Discover the applications (toolkits) available in Engini and their connection requirements. - name: Tools description: Browse and execute the tools exposed by Engini applications. - name: Toolsets description: Manage toolsets - named groupings of connections and tools. - name: McpServers description: >- Inspect and maintain MCP servers - the account-wide endpoints that expose Engini tools and workflows over the Model Context Protocol. Distinct from the MCPClient connection kind, which is Engini consuming a third-party MCP server. - name: Connections description: >- Manage connections to applications, including OAuth sign-in and default-connection selection. - name: Triggers description: >- Create triggers that fire when something changes in a connected app, and manage the destinations their events are delivered to. paths: /v1/triggers/types: get: tags: - Triggers summary: List trigger types description: >- Returns the trigger types available to the caller across all applications (or one, when applicationSlug is supplied), honoring the optional search filter and pagination. A trigger type whose connector cannot currently be subscribed to (no lifecycle workflows to back a realtime subscription) is omitted rather than listed with a broken contract - see GET .../triggers/types/{triggerSlug} for the corresponding 404. operationId: Triggers_ListTriggerTypes parameters: - name: applicationSlug in: query description: >- Optional filter limiting results to trigger types of a specific application. schema: type: string nullable: true x-position: 1 - name: search in: query description: Optional free-text search applied across trigger-type fields. schema: type: string nullable: true x-position: 2 - name: connectionId in: query description: >- Optional connector id narrowing results to that one connector's catalog. schema: type: integer format: int32 nullable: true x-position: 3 - name: offset in: query description: Zero-based index of the first item to return. Defaults to 0. schema: type: integer format: int32 default: 0 x-position: 4 - name: top in: query description: Maximum number of items to return. Defaults to 100. schema: type: integer format: int32 default: 100 x-position: 5 responses: '200': description: A paginated list of trigger types. content: application/json: schema: $ref: '#/components/schemas/PaginatedResponseOfTriggerTypeDTO' '400': description: Bad request - malformed body or invalid parameters. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '401': description: Unauthorized - missing or invalid bearer token. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '403': description: Forbidden - the caller lacks access to the resource. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '404': description: Not found - the resource does not exist. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '429': description: Too many requests - rate limit exceeded. headers: Retry-After: description: Number of seconds to wait before retrying. schema: type: integer content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error - an unexpected error occurred. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: - Bearer: [] - ApiKey: [] components: schemas: PaginatedResponseOfTriggerTypeDTO: type: object description: Offset-based paginated wrapper for a list of items. additionalProperties: false required: - items - totalCount - offset - top properties: items: type: array description: The items in the current page. items: $ref: '#/components/schemas/TriggerTypeDTO' totalCount: type: integer description: Total number of items available across all pages. format: int32 offset: type: integer description: Number of items skipped before this page (the requested offset). format: int32 top: type: integer description: Maximum number of items requested for this page. format: int32 ErrorResponse: type: object description: >- Unified error envelope for every non-200 response from /api/DeveloperAPI/v1/*. See applications-tools-spec.md §"Error envelope". additionalProperties: false required: - errorCode - message - requestId - timestamp - path properties: errorCode: type: string description: Machine-readable error code identifying the failure. message: type: string description: Human-readable error message. requestId: type: string description: Identifier of the request, for support/correlation. timestamp: type: string description: Timestamp when the error occurred (ISO 8601). path: type: string description: Request path that produced the error. details: type: array description: Per-field validation details, when applicable. nullable: true items: $ref: '#/components/schemas/ErrorDetail' TriggerTypeDTO: type: object description: >- Public Developer API v1 representation of a trigger type - a persisted-slug Activity row of ActivityType.Trigger, given a public name and contract (not a new entity; no trigger instances are created here). Returned by GET /api/DeveloperAPI/v1/triggers/types. Field names are pinned via JsonPropertyAttribute to the Composio-parity snake_case wire contract (trigger_slug, application_slug) rather than the project's usual camelCase resolver - see docs/superpowers/specs/2026-08-20-engini-triggers-design.md §6. A NEW DTO: ActivityInputSchema stays untouched - it backs a published legacy contract. additionalProperties: false required: - delivery properties: trigger_slug: type: string application_slug: type: string name: type: string nullable: true description: type: string nullable: true delivery: type: string description: >- How this trigger fires: realtime (the provider pushes events to Engini), polling (Engini checks on a schedule) or manual_webhook (you post to a URL Engini gives you). Always one of those three - a trigger type whose connector cannot currently back a realtime subscription is left out of the catalog rather than listed with a fourth value. ErrorDetail: type: object description: A single field-level error detail within an ErrorResponse. additionalProperties: false required: - field - issue properties: field: type: string description: Name of the field the issue relates to. issue: type: string description: Description of the issue with the field. securitySchemes: Bearer: type: http description: Enter your JWT token scheme: bearer bearerFormat: JWT ApiKey: type: apiKey description: >- Opaque Developer API key (prefix `eng_`). Authenticates as the key's owner and resolves the account automatically. name: x-api-key in: header ````