> ## Documentation Index > Fetch the complete documentation index at: https://docs.gorules.io/llms.txt > Use this file to discover all available pages before exploring further. # Simulate decision > Simulates a decision graph evaluation without persisting changes, useful for testing decision logic. ## OpenAPI ````yaml /openapi/brms.json post /api/projects/{projectId}/decisions/simulate openapi: 3.0.3 info: title: GoRules BRMS version: local servers: [] security: [] tags: - name: AI description: >- AI-powered assistant for interactive conversations and decision logic generation - name: Audit log description: Track and export organisation activity logs for compliance and monitoring - name: Branches description: >- Manage feature branches for collaborative decision development with commits and merging - name: Change requests description: Review and approve changes before merging or deploying to environments - name: Cloud description: Cloud-specific endpoints for organisation and client management - name: Decision description: Evaluate and simulate decision graphs with trace and performance data - name: Deployment workflows description: Manage deployment workflow runs and job approvals - name: Deployments description: Configure cloud storage providers for release deployments - name: Document description: Manage decision documents, versions, and file operations within projects - name: Environment description: >- Configure deployment environments with approval workflows and access tokens - name: Group description: Manage permission groups for project-level access control - name: Infrastructure description: Health check and infrastructure status endpoints - name: Integration description: Configure external integrations for HTTP requests and data sources - name: Invitation description: Manage organisation invitations for new members - name: Member description: Manage project membership and group assignments - name: Organisation description: Manage organisation settings, preferences, and licensing - name: Personal access token description: Create and manage personal access tokens for API authentication - name: Profile description: Manage current user profile settings - name: Project description: Create and manage projects with approval workflows - name: Release description: >- Package, version, and deploy decision documents. Learn more about [Releases](https://gorules.io/developers/brms/multi-environment) - name: Roles description: Define custom roles with permissions for organisation-wide access control - name: Security description: Manage project access tokens for API authentication - name: Templates description: Browse and apply project templates for quick onboarding - name: Test events description: Manage test events for decision evaluation and testing - name: User description: Manage organisation users, invitations, and service accounts paths: /api/projects/{projectId}/decisions/simulate: post: tags: - Decision summary: Simulate decision description: >- Simulates a decision graph evaluation without persisting changes, useful for testing decision logic. operationId: simulateDecision parameters: - schema: type: string format: uuid in: path name: projectId required: true description: Unique identifier of the project requestBody: content: application/json: schema: type: object properties: published: type: boolean default: true description: >- Indicates if simulation should use published decisions or draft releaseId: type: string nullable: true description: Optional release ID to use for loading dependent decisions context: type: object nullable: true additionalProperties: true default: {} description: Evaluation context example: cart: total: 1500 customer: country: US tier: gold graph: description: Decision graph example: edges: - id: 1dfbc57d-ad1f-4cf8-978a-e43241856fc8 type: edge sourceId: be0a5c2d-538d-4e50-9843-91b274e1b9d8 targetId: 7c07550a-07bc-4ee4-80d6-9ad900e3d6c9 - id: 5e2dc187-3b82-4f21-94f5-9c3fd16e12d4 type: edge sourceId: 7c07550a-07bc-4ee4-80d6-9ad900e3d6c9 targetId: 72d52cfc-e866-4c11-bf79-6be9f750e4d7 nodes: - id: be0a5c2d-538d-4e50-9843-91b274e1b9d8 name: Request type: inputNode position: x: 180 'y': 280 - id: 7c07550a-07bc-4ee4-80d6-9ad900e3d6c9 name: Fees type: decisionTableNode content: rules: - _id: vCqrZGdWjA DA3Ybo-shA: '"US"' FD4qBBPv2G: '> 1000' JuUcECFGe1: '2' jrsT5Wg9F8: '"gold"' qA7iYc3Wle: '' - _id: CpXx-s78FH DA3Ybo-shA: '"US"' FD4qBBPv2G: '> 1000' JuUcECFGe1: '3' jrsT5Wg9F8: '' qA7iYc3Wle: '' - _id: zH-PuRB2aQ DA3Ybo-shA: '"US"' FD4qBBPv2G: '' JuUcECFGe1: '' jrsT5Wg9F8: '' qA7iYc3Wle: '25' - _id: HjEp-eQhAP DA3Ybo-shA: '"CA","MX"' FD4qBBPv2G: '> 1000' JuUcECFGe1: '5' jrsT5Wg9F8: '' qA7iYc3Wle: '' - _id: nq40hJ1nXy DA3Ybo-shA: '"CA","MX"' FD4qBBPv2G: '' JuUcECFGe1: '' jrsT5Wg9F8: '' qA7iYc3Wle: '50' - _id: G64ltgrVgV DA3Ybo-shA: '"IE","UK","FR","DE"' FD4qBBPv2G: '> 1000' JuUcECFGe1: '10' jrsT5Wg9F8: '' qA7iYc3Wle: '' - _id: PD3oYgtiDa DA3Ybo-shA: '"IE","UK","FR","DE"' FD4qBBPv2G: '' JuUcECFGe1: '' jrsT5Wg9F8: '' qA7iYc3Wle: '100' - _id: 1BY7iMFoDw DA3Ybo-shA: '' FD4qBBPv2G: '> 1000' JuUcECFGe1: '15' jrsT5Wg9F8: '' qA7iYc3Wle: '' - _id: dlwJlbW7ZH DA3Ybo-shA: '' FD4qBBPv2G: '' JuUcECFGe1: '' jrsT5Wg9F8: '' qA7iYc3Wle: '150' inputs: - id: FD4qBBPv2G name: Cart Total type: expression field: cart.total - id: DA3Ybo-shA name: Customer Country type: expression field: customer.country - id: jrsT5Wg9F8 name: Customer Tier type: expression field: customer.tier outputs: - id: qA7iYc3Wle name: Fees Flat ($) type: expression field: fees.flat - id: JuUcECFGe1 name: Fees Percent type: expression field: fees.percent hitPolicy: first position: x: 420 'y': 280 - id: 72d52cfc-e866-4c11-bf79-6be9f750e4d7 name: Response type: outputNode position: x: 670 'y': 280 responses: '200': description: Successful simulation result with trace data content: application/json: schema: type: object properties: result: description: The computed result from the decision evaluation performance: type: string description: Total execution time of the decision trace: type: object additionalProperties: type: object properties: id: type: string description: Unique identifier of the trace node name: type: string description: Name of the decision node input: description: Input data passed to this node output: description: Output data produced by this node traceData: description: Additional trace metadata for the node performance: type: string description: Execution time for this node required: - id - name description: >- Detailed trace of each node execution when trace is enabled additionalProperties: true description: Successful simulation result with trace data '400': description: Simulation failed due to invalid input or decision logic error content: application/json: schema: type: object properties: message: type: string description: Error message describing the simulation failure data: description: Additional error details from the decision engine description: Simulation failed due to invalid input or decision logic error security: - personalAccessToken: [] - internalAuth: [] components: securitySchemes: personalAccessToken: type: http scheme: bearer description: Personal access token is obtained through your profile internalAuth: type: http scheme: internal description: Cannot be used directly ````