> ## Documentation Index > Fetch the complete documentation index at: https://docs.gp.scale.com/llms.txt > Use this file to discover all available pages before exploring further. # Create Evaluation Group > Create a new evaluation group bundling one or more existing evaluations. The request must list at least one evaluation ID, and duplicate IDs are rejected. Every listed evaluation is validated for existence and account access before the group is created; an unknown or inaccessible evaluation ID fails the whole request with a 400 rather than creating a partial group. The named evaluations are added as group members in the same transaction, and any supplied row_identifiers (an evaluation_id-to-column-name mapping used for cross-dataset joins) are persisted alongside them, ignoring entries for evaluation IDs not in the group. The returned group includes its members enriched with each evaluation's name, tags, and creation time. Unlike the PUT and PATCH update endpoints, creation does not trigger any dashboard-widget recomputation. ## OpenAPI ````yaml https://api.dev-sgp.scale.com/openapi-versions/v5/openapi.json post /v5/evaluation-groups openapi: 3.1.0 info: title: EGP API V5 description: >- This is the parent API for all EGP APIs. If you are looking for the EGP API, please go to https://api.egp.scale.com/docs. contact: name: Scale Generative AI Platform url: https://scale.com/genai-platform version: 0.1.0 servers: - url: https://api.egp.scale.com security: [] paths: /v5/evaluation-groups: post: tags: - Evaluation Groups summary: Create Evaluation Group description: >- Create a new evaluation group bundling one or more existing evaluations. The request must list at least one evaluation ID, and duplicate IDs are rejected. Every listed evaluation is validated for existence and account access before the group is created; an unknown or inaccessible evaluation ID fails the whole request with a 400 rather than creating a partial group. The named evaluations are added as group members in the same transaction, and any supplied row_identifiers (an evaluation_id-to-column-name mapping used for cross-dataset joins) are persisted alongside them, ignoring entries for evaluation IDs not in the group. The returned group includes its members enriched with each evaluation's name, tags, and creation time. Unlike the PUT and PATCH update endpoints, creation does not trigger any dashboard-widget recomputation. operationId: POST-V5-/v5/evaluation-groups parameters: - name: x-selected-account-id in: header required: false schema: anyOf: - type: string - type: 'null' title: Account ID Header requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/EvaluationGroupCreateRequest' responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/EvaluationGroup' '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' security: - APIKeyHeader: [] components: schemas: EvaluationGroupCreateRequest: properties: tags: title: Tags description: The tags associated with the entity items: type: string type: array name: type: string maxLength: 128 title: Name description: Name of the evaluation group description: title: Description description: Optional description type: string metadata: title: Metadata description: Optional metadata key-value pairs example: project: Q4-2025 team: ml-eval additionalProperties: true type: object evaluation_ids: items: type: string type: array minItems: 1 title: Evaluation Ids description: List of evaluation IDs to include in the group row_identifiers: title: Row Identifiers description: >- Optional mapping of evaluation_id to column name for cross-dataset joins example: eval-123: user_id eval-456: customer_id additionalProperties: type: string type: object type: object required: - name - evaluation_ids title: EvaluationGroupCreateRequest description: Request model for creating an evaluation group EvaluationGroup: properties: id: type: string title: Id description: Unique identifier of the evaluation group object: type: string const: evaluation_group title: Object default: evaluation_group tags: title: Tags description: The tags associated with the entity items: type: string type: array name: type: string title: Name description: Name of the evaluation group description: title: Description description: Optional description type: string metadata: title: Metadata description: Optional metadata key-value pairs additionalProperties: true type: object created_at: type: string format: date-time title: Created At description: When the group was created deleted_at: title: Deleted At description: When the group was soft-deleted type: string format: date-time account_id: type: string title: Account Id description: Account that owns this evaluation group members: title: Members description: Evaluation members in this group. Populated with 'members' view. items: $ref: '#/components/schemas/EvaluationGroupMember' type: array row_identifiers: title: Row Identifiers description: Row identifier mappings. Populated with 'row_identifiers' view. items: $ref: '#/components/schemas/EvaluationGroupRowIdentifier' type: array type: object required: - tags - id - name - created_at - account_id description: Response model for evaluation group HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError EvaluationGroupMember: properties: id: type: string title: Id description: Unique identifier of the member record object: type: string const: evaluation_group.member title: Object default: evaluation_group.member evaluation_group_id: type: string title: Evaluation Group Id description: ID of the evaluation group evaluation_id: type: string title: Evaluation Id description: ID of the evaluation evaluation_name: title: Evaluation Name description: Name of the evaluation type: string evaluation_tags: title: Evaluation Tags description: Tags of the evaluation items: type: string type: array evaluation_created_at: title: Evaluation Created At description: When the evaluation was created type: string format: date-time created_at: type: string format: date-time title: Created At description: When this member was added to the group deleted_at: title: Deleted At description: When this membership was soft-deleted (if applicable) type: string format: date-time type: object required: - id - evaluation_group_id - evaluation_id - created_at description: Response model for evaluation group member EvaluationGroupRowIdentifier: properties: object: type: string const: evaluation_group.row_identifier title: Object default: evaluation_group.row_identifier evaluation_id: type: string title: Evaluation Id description: ID of the evaluation column_name: type: string title: Column Name description: Name of the column used as row identifier type: object required: - evaluation_id - column_name description: Response model for evaluation group row identifier ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: title: Error Type type: string input: title: Input ctx: type: object title: Context additionalProperties: true type: object required: - loc - msg - type title: ValidationError securitySchemes: APIKeyHeader: type: apiKey in: header name: x-api-key ````