> ## Documentation Index > Fetch the complete documentation index at: https://api-portal.etoro.com/llms.txt > Use this file to discover all available pages before exploring further. # Start copying an investor, or adjust an existing copy > **Rate limit:** 60 requests per 60 seconds. This is the **default shared quota** — it is shared with every other endpoint that has no dedicated limit, so requests across those endpoints all draw from the same budget. --- Registers a copy relationship with the given investor for the authenticated account. If the copy already exists, funds will be added to or removed from it; if it does not exist, a new copy will be created and funds transferred into it. Every change of funds causes a realignment process that adjusts all the positions inside the sub-portfolio to match the parent portfolio proportions. Investor account ids (parentCID) are the ids surfaced by the platform's public endpoints (for example, the Rankings endpoints). The operation is asynchronous: the response token acknowledges acceptance, and the outcome can be checked via GET /api/v2/trading/copy/demo/{referenceId} using the referenceID supplied here. ## OpenAPI ````yaml /api-reference/openapi.json post /api/v2/trading/copy/demo openapi: 3.0.1 info: title: eToro Api version: v1.352.0 description: >- eToro’s public API provides access to real-time financial data, trading insights, and account management features, allowing developers to integrate eToro’s services into their applications. With access to market prices, historical data, and social trading information, the API empowers users to enhance their trading strategies. Designed for security and scalability, the eToro API ensures smooth and reliable integration for a variety of financial applications. For more details on integrating with eToro's public WebSocket service, please refer to the dedicated [WebSocket documentation](./websocket/websocket-doc.html). ## Authentication Every request must be authenticated with exactly one of two options: an OAuth 2.0 access token (`Authorization: Bearer `), or the non-interactive credential pair (`x-api-key` + `x-user-key` headers). The two options are mutually exclusive — a request carrying both is rejected. Each operation lists the OAuth scopes that grant access as alternative security requirements: a bearer token needs only ONE of them, and the same permissions govern the credential pair. servers: - url: https://public-api.etoro.com description: eToro Public API security: - apiKeyAuth: [] userKeyAuth: [] - oauth2: [] tags: - name: Agent Portfolios - name: Social Feeds - name: Balances - name: Clubs - name: Watchlists - name: Top Assets - name: App Data - name: Market Data - name: Identity - name: Cash Accounts - name: Transfer - name: Notifications - name: PI Data - name: PortfolioSearch - name: Price Alerts - name: SSO - Applications - name: SSO - Scopes - name: Sub-Accounts - eToro Trading - name: Sub-Accounts - name: Trading - Demo - name: Trading - Real - name: Users Info - name: Rankings - name: User Stats - name: Copy Trading - name: Copy Trading - Demo paths: /api/v2/trading/copy/demo: post: tags: - Copy Trading - Demo summary: Start copying an investor, or adjust an existing copy description: >- **Rate limit:** 60 requests per 60 seconds. This is the **default shared quota** — it is shared with every other endpoint that has no dedicated limit, so requests across those endpoints all draw from the same budget. --- Registers a copy relationship with the given investor for the authenticated account. If the copy already exists, funds will be added to or removed from it; if it does not exist, a new copy will be created and funds transferred into it. Every change of funds causes a realignment process that adjusts all the positions inside the sub-portfolio to match the parent portfolio proportions. Investor account ids (parentCID) are the ids surfaced by the platform's public endpoints (for example, the Rankings endpoints). The operation is asynchronous: the response token acknowledges acceptance, and the outcome can be checked via GET /api/v2/trading/copy/demo/{referenceId} using the referenceID supplied here. operationId: registerCopyTradingDemo parameters: - name: x-request-id in: header required: true schema: type: string format: uuid example: 2b4f542a-1622-4c9d-a82c-ed681de4f008 description: A unique request identifier. requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CopyTradingRegisterRequest' example: parentCID: 5551234 amount: 500 referenceID: partner-op-2026-07-15-0001 responses: '200': description: Request accepted for asynchronous processing content: application/json: schema: $ref: '#/components/schemas/TokenedResponse' example: token: 3c0e5b1f-8d2a-4f6e-9b7c-1a2b3c4d5e6f headers: RateLimit-Limit: description: >- Maximum number of requests allowed per window. This is the default shared pool used by every endpoint without a dedicated limit, so it is NOT per-endpoint — requests across those endpoints all draw from this one budget. schema: type: integer example: 60 RateLimit-Remaining: description: Requests remaining in the current window for this quota. schema: type: integer RateLimit-Reset: description: Seconds until the current window resets. schema: type: integer RateLimit-Policy: description: Quota policy in the form `;w=`. schema: type: string example: 60;w=60 '400': description: >- Validation failure (e.g. zero amount, missing referenceID, referenceID longer than 35 characters) content: application/json: schema: $ref: '#/components/schemas/CopyTradingErrorResponse' example: error: Amount must not be zero '401': description: Missing or invalid credential content: application/json: schema: $ref: '#/components/schemas/GatewayErrorResponse' example: errorCode: Unauthorized errorMessage: Unauthorized '403': description: Caller not authorized for this operation content: application/json: schema: $ref: '#/components/schemas/GatewayErrorResponse' example: errorCode: InsufficientPermissions errorMessage: InsufficientPermissions '429': description: Rate limit exceeded content: application/json: schema: $ref: '#/components/schemas/GatewayErrorResponse' headers: RateLimit-Limit: description: >- Maximum number of requests allowed per window. This is the default shared pool used by every endpoint without a dedicated limit, so it is NOT per-endpoint — requests across those endpoints all draw from this one budget. schema: type: integer example: 60 RateLimit-Remaining: description: Requests remaining in the current window for this quota. schema: type: integer RateLimit-Reset: description: Seconds until the current window resets. schema: type: integer RateLimit-Policy: description: Quota policy in the form `;w=`. schema: type: string example: 60;w=60 Retry-After: description: Seconds to wait before retrying. schema: type: integer example: 60 security: - apiKeyAuth: [] userKeyAuth: [] - oauth2: - etoro-public:demo:write - oauth2: - etoro-public:trade.demo:write components: schemas: CopyTradingRegisterRequest: type: object required: - parentCID - amount - referenceID properties: parentCID: type: integer format: int32 description: The investor account id to copy. amount: type: number format: decimal description: >- Amount to allocate to the copy, in the account currency. Value must be non-zero. A positive value adds these funds into the copy sub-portfolio; a negative value removes funds from the sub-portfolio. Every change of funds causes a realignment process that adjusts all the positions inside the sub-portfolio to match the parent portfolio proportions. referenceID: type: string maxLength: 35 description: >- Caller-supplied operation reference used to poll the outcome. Case-sensitive, URL-safe characters without '/', unique per operation within your account. Not an idempotency key: resubmitting the same value creates a new operation, and status lookups for a reused reference prefer the successful outcome. TokenedResponse: type: object required: - token properties: token: type: string format: uuid description: Correlation token for the accepted asynchronous operation. CopyTradingErrorResponse: type: object description: Error response from the Copy Trading API (400, 404 and 500 statuses). required: - error properties: error: type: string description: >- Human-readable error message naming the offending field where applicable. example: Amount must not be zero GatewayErrorResponse: type: object description: >- Standard error response from the public API gateway (401, 403 and 429 statuses). required: - errorCode - errorMessage properties: errorCode: type: string description: Machine-readable error code example: Unauthorized errorMessage: type: string description: Human-readable error message example: Unauthorized securitySchemes: apiKeyAuth: type: apiKey in: header name: x-api-key description: >- API key of the application. Only valid together with the x-user-key header — the pair is an alternative to OAuth bearer authentication, never sent alongside it. The pair is granted the same permissions the operation's OAuth scopes describe. Demo credential for trying the API from these docs: `lhgfaslk21490FAScVPkdsb53F9dNkfHG4faZSG5vfjndfcfgdssdgsdHF4663` x-default: lhgfaslk21490FAScVPkdsb53F9dNkfHG4faZSG5vfjndfcfgdssdgsdHF4663 userKeyAuth: type: apiKey in: header name: x-user-key description: >- User-specific authentication key. Only valid together with the x-api-key header — the pair is an alternative to OAuth bearer authentication, never sent alongside it. Demo credential for trying the API from these docs: `eyJlYW4iOiJVbnJlZ2lzdGVyZWRBcHBsaWNhdGlvbiIsImVrIjoiOE5sZ2cwcW5EUVdROUFNWGpXT2lmOWktZnpidG5KcUlqWGJ3WHJZZkpZcldrbG90ZEhvLVBjSWhQaU8xU1ZtMW84aU1WZGZqN2xWNzFjLXFxLmcybXE1dnh4Q1hUT25xaWRUaTFlcEhmVk1fIn0_` x-default: >- eyJlYW4iOiJVbnJlZ2lzdGVyZWRBcHBsaWNhdGlvbiIsImVrIjoiOE5sZ2cwcW5EUVdROUFNWGpXT2lmOWktZnpidG5KcUlqWGJ3WHJZZkpZcldrbG90ZEhvLVBjSWhQaU8xU1ZtMW84aU1WZGZqN2xWNzFjLXFxLmcybXE1dnh4Q1hUT25xaWRUaTFlcEhmVk1fIn0_ oauth2: type: oauth2 description: >- eToro OAuth2 — send the access token as `Authorization: Bearer `. Each operation lists the scopes that grant access as separate `security` requirements (OpenAPI OR semantics): the caller's token only needs ONE of them — you do NOT need all of them. Mutually exclusive with the x-api-key/x-user-key credential pair: never send both. flows: authorizationCode: authorizationUrl: '' tokenUrl: '' scopes: etoro-public:agent-portfolio:read: Grants access to the 'etoro-public:agent-portfolio:read' scope. etoro-public:agent-portfolio:write: Grants access to the 'etoro-public:agent-portfolio:write' scope. etoro-public:club:read: Grants access to the 'etoro-public:club:read' scope. etoro-public:demo:read: Grants access to the 'etoro-public:demo:read' scope. etoro-public:demo:write: Grants access to the 'etoro-public:demo:write' scope. etoro-public:feed:read: Grants access to the 'etoro-public:feed:read' scope. etoro-public:feed:write: Grants access to the 'etoro-public:feed:write' scope. etoro-public:money.balance:read: Grants access to the 'etoro-public:money.balance:read' scope. etoro-public:money.cash-transactions:read: >- Grants access to the 'etoro-public:money.cash-transactions:read' scope. etoro-public:money.transfer:read: Grants access to the 'etoro-public:money.transfer:read' scope. etoro-public:money.transfer:write: Grants access to the 'etoro-public:money.transfer:write' scope. etoro-public:money:transfer: Grants access to the 'etoro-public:money:transfer' scope. etoro-public:notifications:read: Grants access to the 'etoro-public:notifications:read' scope. etoro-public:notifications:write: Grants access to the 'etoro-public:notifications:write' scope. etoro-public:pi-data:read: Grants access to the 'etoro-public:pi-data:read' scope. etoro-public:price-alerts:read: Grants access to the 'etoro-public:price-alerts:read' scope. etoro-public:price-alerts:write: Grants access to the 'etoro-public:price-alerts:write' scope. etoro-public:real:read: Grants access to the 'etoro-public:real:read' scope. etoro-public:real:write: Grants access to the 'etoro-public:real:write' scope. etoro-public:sso-applications:read: Grants access to the 'etoro-public:sso-applications:read' scope. etoro-public:sso-applications:write: Grants access to the 'etoro-public:sso-applications:write' scope. etoro-public:sso-scopes:read: Grants access to the 'etoro-public:sso-scopes:read' scope. etoro-public:sso-scopes:write: Grants access to the 'etoro-public:sso-scopes:write' scope. etoro-public:sub-accounts:read: Grants access to the 'etoro-public:sub-accounts:read' scope. etoro-public:sub-accounts:write: Grants access to the 'etoro-public:sub-accounts:write' scope. etoro-public:trade.demo:read: Grants access to the 'etoro-public:trade.demo:read' scope. etoro-public:trade.demo:write: Grants access to the 'etoro-public:trade.demo:write' scope. etoro-public:trade.real:read: Grants access to the 'etoro-public:trade.real:read' scope. etoro-public:trade.real:write: Grants access to the 'etoro-public:trade.real:write' scope. etoro-public:user-info:read: Grants access to the 'etoro-public:user-info:read' scope. etoro-public:watchlist:read: Grants access to the 'etoro-public:watchlist:read' scope. etoro-public:watchlist:write: Grants access to the 'etoro-public:watchlist:write' scope. ````