> ## Documentation Index > Fetch the complete documentation index at: https://docs.galileo.ai/llms.txt > Use this file to discover all available pages before exploring further. # List Signal Affected Sessions > List affected sessions and stored evidence for one Signal and its merged Signals. ## OpenAPI ````yaml https://api.galileo.ai/public/v2/openapi.json get /v2/projects/{project_id}/runs/{run_id}/signals/{signal_id}/affected-sessions openapi: 3.1.0 info: title: FastAPI version: 0.1.0 servers: - url: https://api.galileo.ai description: Galileo Public APIs - galileo-v2 security: [] paths: /v2/projects/{project_id}/runs/{run_id}/signals/{signal_id}/affected-sessions: get: tags: - signals-v2 summary: List Signal Affected Sessions description: >- List affected sessions and stored evidence for one Signal and its merged Signals. operationId: >- list_signal_affected_sessions_v2_projects__project_id__runs__run_id__signals__signal_id__affected_sessions_get parameters: - name: project_id in: path required: true schema: type: string format: uuid4 title: Project Id - name: signal_id in: path required: true schema: type: string format: uuid4 title: Signal Id - name: run_id in: path required: true schema: type: string format: uuid4 title: Run Id - name: last_seen_after in: query required: false schema: anyOf: - type: string format: date-time - type: 'null' title: Last Seen After - name: last_seen_before in: query required: false schema: anyOf: - type: string format: date-time - type: 'null' title: Last Seen Before - name: scan_id in: query required: false schema: anyOf: - type: string format: uuid4 - type: 'null' title: Scan Id - name: cursor in: query required: false schema: anyOf: - type: string minLength: 1 maxLength: 2048 - type: 'null' title: Cursor - name: limit in: query required: false schema: type: integer maximum: 100 minimum: 1 default: 25 title: Limit responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/SignalAffectedSessionListResponse' '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' security: - APIKeyHeader: [] - ClassicAPIKeyHeader: [] - OAuth2PasswordBearer: [] - HTTPBasic: [] components: schemas: SignalAffectedSessionListResponse: properties: data: items: $ref: '#/components/schemas/SignalAffectedSession' type: array title: Data meta: $ref: '#/components/schemas/SignalAffectedSessionListMeta' additionalProperties: false type: object required: - data - meta title: SignalAffectedSessionListResponse HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError SignalAffectedSession: properties: session_id: type: string format: uuid4 title: Session Id last_seen_at: type: string format: date-time title: Last Seen At last_seen_scan_id: type: string format: uuid4 title: Last Seen Scan Id occurrence_count: type: integer minimum: 1 title: Occurrence Count trace_count: type: integer minimum: 0 title: Trace Count span_count: type: integer minimum: 0 title: Span Count occurrences: items: $ref: '#/components/schemas/SignalOccurrence' type: array title: Occurrences additionalProperties: false type: object required: - session_id - last_seen_at - last_seen_scan_id - occurrence_count - trace_count - span_count - occurrences title: SignalAffectedSession description: Occurrences grouped under one affected session. SignalAffectedSessionListMeta: properties: next_cursor: anyOf: - type: string - type: 'null' title: Next Cursor total: type: integer minimum: 0 title: Total additionalProperties: false type: object required: - next_cursor - total title: SignalAffectedSessionListMeta ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type input: title: Input ctx: type: object title: Context type: object required: - loc - msg - type title: ValidationError SignalOccurrence: properties: id: type: string format: uuid4 title: Id occurrence_ref: type: string title: Occurrence Ref origin_signal: $ref: '#/components/schemas/SignalReference' scan_id: type: string format: uuid4 title: Scan Id session_id: type: string format: uuid4 title: Session Id observed_at: type: string format: date-time title: Observed At problem_type_id: type: string title: Problem Type Id problem_nature: $ref: '#/components/schemas/SignalProblemNature' outcome: $ref: '#/components/schemas/SignalOccurrenceOutcome' component: $ref: '#/components/schemas/SignalComponent' description: type: string title: Description classification_rationale: type: string title: Classification Rationale evidence: items: $ref: '#/components/schemas/SignalEvidenceReference' type: array title: Evidence additionalProperties: false type: object required: - id - occurrence_ref - origin_signal - scan_id - session_id - observed_at - problem_type_id - problem_nature - outcome - component - description - classification_rationale - evidence title: SignalOccurrence description: One defect occurrence found in a completed session. SignalReference: properties: id: type: string format: uuid4 title: Id display_key: type: string title: Display Key title: type: string title: Title last_seen_at: type: string format: date-time title: Last Seen At additionalProperties: false type: object required: - id - display_key - title - last_seen_at title: SignalReference description: Signal identity shown for a merge relationship. SignalProblemNature: type: string enum: - REALIZED_DEFECT - INEFFICIENCY - RISK_EXPOSURE title: SignalProblemNature description: Nature of one defect occurrence. SignalOccurrenceOutcome: type: string enum: - SUCCEEDED - PARTIALLY_SUCCEEDED - FAILED - UNKNOWN title: SignalOccurrenceOutcome description: Outcome of the session containing an occurrence. SignalComponent: properties: type: $ref: '#/components/schemas/StepType' name: type: string title: Name additionalProperties: false type: object required: - type - name title: SignalComponent description: Agent component associated with a Signal or occurrence. SignalEvidenceReference: properties: trace_id: type: string format: uuid4 title: Trace Id span_id: type: string format: uuid4 title: Span Id explanation: type: string title: Explanation additionalProperties: false type: object required: - trace_id - span_id - explanation title: SignalEvidenceReference description: Trace span cited as evidence for one occurrence. StepType: type: string enum: - http - llm - retriever - tool - workflow - agent - control - trace - session title: StepType securitySchemes: APIKeyHeader: type: apiKey in: header name: Splunk-AO-API-Key ClassicAPIKeyHeader: type: apiKey in: header name: Galileo-API-Key OAuth2PasswordBearer: type: oauth2 flows: password: scopes: {} tokenUrl: https://api.galileo.ai/login HTTPBasic: type: http scheme: basic ````