> ## Documentation Index > Fetch the complete documentation index at: https://docs.engini.io/llms.txt > Use this file to discover all available pages before exploring further. # Create connection > Create a new connection for the caller. ## OpenAPI ````yaml /api-reference/openapi.json post /v1/connections 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: [] paths: /v1/connections: post: tags: - Connections summary: Create connection description: Create a new connection for the caller. operationId: Connections_CreateConnection parameters: [] requestBody: x-name: request description: >- The connection creation payload, including the connection name and application slug. content: application/json: schema: $ref: '#/components/schemas/CreateConnectionRequest' required: true x-position: 1 responses: '200': description: The newly created connection. content: application/json: schema: $ref: '#/components/schemas/ConnectionPublicDetail' '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: CreateConnectionRequest: type: object description: Request body for creating a connection. additionalProperties: false required: - applicationSlug - connectionName - authenticationId - fields properties: applicationSlug: type: string description: Slug of the application to connect to. connectionName: type: string description: Display name for the new connection. description: type: string description: Optional description of the connection. nullable: true authenticationId: type: integer description: Identifier of the authentication method to use. format: int32 fields: type: object description: Connection field values, keyed by field name. additionalProperties: type: string metadata: type: object description: Optional additional connection metadata, keyed by name. nullable: true additionalProperties: type: string ConnectionPublicDetail: allOf: - $ref: '#/components/schemas/ConnectionPublicListItem' - type: object description: >- Public-shape detail for /api/DeveloperAPI/v1/Connections/{id} and create/update responses. additionalProperties: false properties: authenticationId: type: integer description: Identifier of the authentication method used by the connection. format: int32 authenticationType: type: string description: Name of the authentication type used by the connection. fields: type: object description: >- Connection field values, keyed by field name (sensitive values may be masked). additionalProperties: type: string nullable: true useSelectDBObjects: type: boolean description: Whether the connection uses selected database objects. connectionError: type: string description: Last connection error message, if any. nullable: true isAlive: type: boolean description: Whether the connection is currently healthy/reachable. metadata: type: object description: Additional connection metadata, keyed by name. nullable: true additionalProperties: type: string 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' ConnectionPublicListItem: type: object description: >- Public-shape list item for /api/DeveloperAPI/v1/Connections. Applications are identified by slug only (no ApplicationId in the wire response). Internal queries continue to use ConnectionList which carries both. additionalProperties: false required: - connectionId - connectionName - applicationSlug - isPublic - createdBy - createdDate properties: connectionId: type: integer description: Identifier of the connection. format: int32 connectionName: type: string description: Display name of the connection. description: type: string description: Description of the connection. nullable: true applicationSlug: type: string description: Slug of the connection's application. applicationName: type: string description: Display name of the connection's application. nullable: true applicationLogo: type: string description: URL of the application's logo image. nullable: true isPublic: type: boolean description: Whether the connection is shared/public. createdBy: type: string description: Identifier of the user who created the connection. format: uuid createdDate: type: string description: When the connection was created. format: date-time updatedBy: type: string description: >- Identifier of the user who last updated the connection; null if never updated. format: uuid nullable: true updatedDate: type: string description: When the connection was last updated; null if never updated. format: date-time nullable: true 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 — no Bearer or companytoken needed. name: x-api-key in: header ````