> ## Documentation Index > Fetch the complete documentation index at: https://docs.hyperprop.com/llms.txt > Use this file to discover all available pages before exploring further. # Close all positions on an account > Closes every open position at market and cancels every working order on one account, immediately. The account keeps its status and is **not** locked out — the trader can trade again straight away; combine with `POST /organization/lockouts` if you also want to stop further trading. The resulting orders carry reason `Admin flatten: — ` (trigger `admin_flatten`), and an `ACCOUNT_UPDATED` event with the counts lands on the account's event log. Requires **manage** permission on traders. If the trading engine cannot be reached the call fails with 502 and nothing is closed. ```bash curl -X POST "https://api.hyperprop.com/platform/v1/organization/trading-accounts/7c9e6679-7425-40de-944b-e07fc1f90ae7/flatten" \ -H "X-API-Key: hp_live_your_key_here" \ -H "Content-Type: application/json" \ -d '{"reason": "Hedging review"}' ``` ## OpenAPI ````yaml /api-reference/openapi.json post /v1/organization/trading-accounts/{accountId}/flatten openapi: 3.0.0 info: title: Hyperprop Platform API version: 1.0.0 description: >- REST API for the Hyperprop Trading Platform — provision evaluation and funded trading accounts, manage traders and plans, react to account lifecycle events via signed webhooks, and reconcile billing. Built for prop firms integrating from their own backend. Authentication, quick start, error handling, idempotency, pagination, custom metadata, webhooks, and the MCP connector are documented at https://docs.hyperprop.com. x-logo: url: https://app.hyperprop.com/logo-icon.svg altText: Hyperprop href: https://hyperprop.com servers: - url: https://api.hyperprop.com/platform description: Production security: [] tags: - name: Trading accounts description: Create, update, and inspect trading accounts. - name: Traders description: Look up and update the traders in your organization. - name: Trading plans description: Define the plans you sell. - name: Trading rules description: Define how accounts are evaluated. - name: Lockouts description: Pause and resume trading on an account. - name: Payouts description: Check payout eligibility and record payouts. - name: Purchases description: Purchases recorded for your organization. - name: Time Machine description: Restore accounts to an earlier trading day or instant. - name: Webhooks description: Register webhook endpoints and inspect deliveries. - name: Events description: Your organization's event history and real-time event stream. - name: Reconciliation description: Balances, end-of-day snapshots, and fills for reconciliation. - name: Analytics description: Organization performance and plan economics. - name: Billing description: 'Your Hyperprop bill: activity, billing cycles, and forecasts.' - name: Team and roles description: Manage dashboard access for your staff. - name: API keys description: Manage your organization's API key. - name: Logs and health description: API request logs, the audit log, and integration health. - name: Organization profile description: Your organization's profile and logo. - name: Support description: Open and follow up on support tickets. - name: Partner access description: >- Read a trader's journal as an approved partner app, with the trader's own key. paths: /v1/organization/trading-accounts/{accountId}/flatten: post: tags: - Trading accounts summary: Close all positions on an account description: >- Closes every open position at market and cancels every working order on one account, immediately. The account keeps its status and is **not** locked out — the trader can trade again straight away; combine with `POST /organization/lockouts` if you also want to stop further trading. The resulting orders carry reason `Admin flatten: — ` (trigger `admin_flatten`), and an `ACCOUNT_UPDATED` event with the counts lands on the account's event log. Requires **manage** permission on traders. If the trading engine cannot be reached the call fails with 502 and nothing is closed. ```bash curl -X POST "https://api.hyperprop.com/platform/v1/organization/trading-accounts/7c9e6679-7425-40de-944b-e07fc1f90ae7/flatten" \ -H "X-API-Key: hp_live_your_key_here" \ -H "Content-Type: application/json" \ -d '{"reason": "Hedging review"}' ``` operationId: postV1OrganizationTradingaccountsAccountidFlatten parameters: - x-format: guid: true name: accountId in: path required: true schema: type: string requestBody: content: application/json: schema: $ref: '#/components/schemas/Model746' responses: '200': description: Success - Positions closed and orders cancelled content: '*/*': schema: $ref: '#/components/schemas/Model748' '401': description: Authentication required content: '*/*': schema: $ref: '#/components/schemas/Model9' '403': description: >- Forbidden - This account belongs to a different organization, or the caller lacks traders:manage content: '*/*': schema: $ref: '#/components/schemas/Model749' '404': description: Not Found - No account exists with this ID content: '*/*': schema: $ref: '#/components/schemas/Model750' '500': description: An unexpected error occurred content: '*/*': schema: $ref: '#/components/schemas/Model5' '502': description: The trading engine did not accept the request; nothing was closed content: '*/*': schema: $ref: '#/components/schemas/Model751' security: - X-API-Key: [] components: schemas: Model746: type: object properties: reason: type: string description: >- Why the positions are being closed. Recorded on every resulting order and on the account's event log. example: Hedging review — positions closed pending clarification minLength: 3 maxLength: 200 x-convert: trim: true required: - reason Model748: type: object properties: success: type: boolean example: true data: $ref: '#/components/schemas/Model747' Model9: type: object properties: success: type: boolean description: Always false on errors example: false statusCode: type: number example: 401 error: type: string example: Unauthorized message: type: string example: Authentication required code: type: string description: Machine-readable error code — switch on this, not on message text example: UNAUTHORIZED Model749: type: object properties: statusCode: type: number example: 403 error: type: string example: Forbidden message: type: string example: This account does not belong to your organization code: type: string example: ACCOUNT_NOT_IN_ORG Model750: type: object properties: statusCode: type: number example: 404 error: type: string example: Not Found message: type: string example: Trading account not found code: type: string example: ACCOUNT_NOT_FOUND Model5: type: object properties: success: type: boolean description: Always false on errors example: false statusCode: type: number example: 500 error: type: string example: Internal Server Error message: type: string example: An unexpected error occurred code: type: string description: Machine-readable error code — switch on this, not on message text example: INTERNAL_ERROR Model751: type: object properties: statusCode: type: number example: 502 error: type: string example: Bad Gateway message: type: string example: >- The trading engine did not accept the flatten request; nothing was closed code: type: string example: ENGINE_UNAVAILABLE Model747: type: object properties: accountId: type: string x-format: guid: true accountNumber: type: string example: ACME-50K-000123 ordersCancelled: type: number example: 1 positionsClosed: type: number example: 1 reason: type: string example: 'Admin flatten: ops@firm.com — Hedging review' securitySchemes: X-API-Key: type: apiKey name: X-API-Key in: header description: >- Organization API key. Format: "hp_live_{key}". Organization admins manage the key in the dashboard. ```` ## Related topics - [Close all open positions for an account](/trade-api/positions/close-all-open-positions-for-an-account.md) - [Flatten account: close positions and cancel orders](/trade-api/positions/flatten-account:-close-positions-and-cancel-orders.md) - [Cancel all pending orders for an account (keeps live position protection)](/trade-api/orders/cancel-all-pending-orders-for-an-account-keeps-live-position-protection.md) - [Close a specific position by contract](/trade-api/positions/close-a-specific-position-by-contract.md) - [Create or update account lockout](/trade-api/account/create-or-update-account-lockout.md) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.