> ## Documentation Index > Fetch the complete documentation index at: https://docs.labelbox.com/llms.txt > Use this file to discover all available pages before exploring further. # List a session's attached files > Returns the files attached to the session, in attachment order. mount_path is present once the file has been staged into the sandbox: at provisioning for managed compute, and on the next tool call for a file attached mid-session. ## OpenAPI ````yaml /managed-agents/openapi.yaml get /managed-agents/v1/sessions/{session_id}/resources openapi: 3.1.0 info: title: Managed Agents API version: 0.14.0 description: >- The Recursion Managed Agents REST API. Authenticate with a Recursion API key as a bearer token. An organization-scoped key acts in its own organization and needs nothing else; a tenant-scoped key must also send `x-organization-id` with an organization id or `default`. Field names follow each operation's published schema. servers: - url: https://api.recursion.labelbox.com security: - bearerAuth: [] paths: /managed-agents/v1/sessions/{session_id}/resources: get: tags: - Sessions summary: List a session's attached files description: >- Returns the files attached to the session, in attachment order. mount_path is present once the file has been staged into the sandbox: at provisioning for managed compute, and on the next tool call for a file attached mid-session. operationId: managedAgentsListSessionResources parameters: - description: Session id (UUID) as returned by startSession or listSessions. in: path name: session_id required: true schema: description: Session id (UUID) as returned by startSession or listSessions. format: uuid type: string responses: '200': content: application/json: schema: $ref: '#/components/schemas/ManagedAgentsSessionResourceListResponse' description: >- Response body of GET and POST /v1/sessions/{session_id}/resources. A POST returns only the resources it attached. '400': description: The request was rejected by schema or semantic validation. content: application/json: schema: $ref: '#/components/schemas/ManagedAgentsApiErrorInvalidRequest' '401': description: The caller is unauthenticated. content: application/json: schema: $ref: '#/components/schemas/ManagedAgentsApiErrorUnauthorized' '403': description: The caller lacks a required permission or capability. content: application/json: schema: $ref: '#/components/schemas/ManagedAgentsApiErrorForbidden' '404': description: No such resource is reachable for this caller. content: application/json: schema: $ref: '#/components/schemas/ManagedAgentsApiErrorNotFound' '409': description: >- The request conflicts with the resource state, or with an in-flight idempotent replay. content: application/json: schema: $ref: >- #/components/schemas/ManagedAgentsApiErrorIosClientUpdateRequired '429': headers: Retry-After: description: When to retry, as delay seconds or an HTTP date. schema: type: string description: A rate limit is exhausted. Honor `Retry-After`. content: application/json: schema: $ref: '#/components/schemas/ManagedAgentsApiErrorRateLimitExceeded' '500': description: An unexpected server-side failure. content: application/json: schema: oneOf: - $ref: '#/components/schemas/ManagedAgentsApiErrorInternalError' - $ref: >- #/components/schemas/ManagedAgentsApiErrorInvariantViolation discriminator: propertyName: code mapping: internal_error: $ref: '#/components/schemas/ManagedAgentsApiErrorInternalError' invariant_violation: $ref: >- #/components/schemas/ManagedAgentsApiErrorInvariantViolation '502': description: The service returned an invalid response. content: application/json: schema: $ref: '#/components/schemas/ManagedAgentsApiErrorBadGateway' '503': description: >- A dependency is unavailable. Consult details.retryable and Retry-After when present before retrying. content: application/json: schema: oneOf: - $ref: >- #/components/schemas/ManagedAgentsApiErrorManagedAgentsUnavailable - $ref: >- #/components/schemas/ManagedAgentsApiErrorServiceUnavailable discriminator: propertyName: code mapping: managed_agents_unavailable: $ref: >- #/components/schemas/ManagedAgentsApiErrorManagedAgentsUnavailable service_unavailable: $ref: >- #/components/schemas/ManagedAgentsApiErrorServiceUnavailable '504': description: The service did not respond before the timeout. content: application/json: schema: $ref: '#/components/schemas/ManagedAgentsApiErrorGatewayTimeout' components: schemas: ManagedAgentsSessionResourceListResponse: description: >- Response body of GET and POST /v1/sessions/{session_id}/resources. A POST returns only the resources it attached. properties: resources: description: >- Every file attached to the session, in attachment order, each with its sandbox path once staged. items: $ref: '#/components/schemas/ManagedAgentsSessionResource' type: - array - 'null' required: - resources type: object example: resources: - byte_size: 1 created_at: '2026-02-18T09:30:00.000Z' file_id: 9f8b1c2d-3e4f-5a6b-7c8d-9e0f1a2b3c4d filename: example media_type: example mount_path: example relative_path: example resource_id: 9f8b1c2d-3e4f-5a6b-7c8d-9e0f1a2b3c4d sha256: example type: file ManagedAgentsApiErrorInvalidRequest: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - invalid_request message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorUnauthorized: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - unauthorized message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorForbidden: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - forbidden message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorNotFound: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - not_found message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorIosClientUpdateRequired: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - ios_client_update_required message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorRateLimitExceeded: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - rate_limit_exceeded message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorInternalError: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - internal_error message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorInvariantViolation: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - invariant_violation message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorBadGateway: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - bad_gateway message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorManagedAgentsUnavailable: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - managed_agents_unavailable message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorServiceUnavailable: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - service_unavailable message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsApiErrorGatewayTimeout: type: object properties: code: type: string minLength: 1 description: Stable machine-readable error code. enum: - gateway_timeout message: type: string minLength: 1 description: Human-readable error message. details: $ref: '#/components/schemas/ManagedAgentsApiErrorDetails' description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. required: - code - message additionalProperties: false description: Standard flat error response. ManagedAgentsSessionResource: description: >- A file attached to a session. The file is placed read-only in the session's sandbox under its files directory, and the agent knows it is there, so it can read it with read_file or from a shell without being told where to look. properties: byte_size: description: Size of the file in bytes. format: int64 type: integer created_at: description: When the resource was attached. format: date-time type: string file_id: description: The attached file. type: string filename: description: The file's name at upload. type: string media_type: description: The file's declared media type. type: string mount_path: description: >- The absolute path where the file is readable inside the sandbox. Absent until staging reaches the sandbox; a resource attached mid-session is staged on the next sandbox call. type: string relative_path: description: >- Where the file lands relative to the session's files directory. Defaults to the filename; set it on attach to rename the file or place it in a subdirectory. type: string resource_id: description: Server-assigned id of the attachment, used to detach it. type: string sha256: description: >- SHA-256 of the bytes the session mounts. Frozen at attach: a later change to the file does not change this session. type: string type: description: Always file. enum: - file type: string required: - resource_id - type - file_id - filename - media_type - byte_size - sha256 - relative_path - created_at type: object example: byte_size: 1 created_at: '2026-02-18T09:30:00.000Z' file_id: 9f8b1c2d-3e4f-5a6b-7c8d-9e0f1a2b3c4d filename: example media_type: example mount_path: example relative_path: example resource_id: 9f8b1c2d-3e4f-5a6b-7c8d-9e0f1a2b3c4d sha256: example type: file ManagedAgentsApiErrorDetails: type: object properties: field: description: >- Request field or header responsible for the error, when one can be identified. type: string issues: description: >- Boundary-validation failures as path-prefixed human-readable messages. type: array items: type: string requestId: description: Request correlation identifier for support and log lookup. type: string retryable: description: >- Server advice about failure transience. `true` means transient, `false` means non-transient, and absence gives no advice. Automatic replay is allowed only when this field is not `false` and the operation-specific retry and idempotency contract permits replay. type: boolean additionalProperties: {} description: >- Optional structured error details. Reserved transport fields are typed; code-specific fields remain forward compatible. securitySchemes: bearerAuth: type: http scheme: bearer description: A Recursion API key, created in the console under API keys. ````