> ## Documentation Index > Fetch the complete documentation index at: https://docs.ondo.finance/llms.txt > Use this file to discover all available pages before exploring further. # Get Session Limits > Provides theoretical maximum asset-specific trading limits for each trading session. These limits are per-user, not global. This API reflects Ondo's statically defined limits; for dynamic, real-time values, see [Get Trading Limits](https://docs.ondo.finance/api-reference/limits/get-trading-limits)) Limits: - The "Max Attestation Count" limits the number of non-expired, non-executed attestations. For example if the limit is 50, and a user has 50 outstanding attestations, they must wait for one to execute or expire before requesting another. - The "Max Active Notional Value" limit is based on the dollar value of outstanding attestations. That is, if a user has a limit of \$1,000,000, and has 30 non-expired, non-filled attestations at a value of \$999,000, they will not be able to request another attestation for \$1000. For caching details on this endpoint, please see: [Endpoint Caching](https://docs.ondo.finance/api-reference/endpoint-caching). ## OpenAPI ````yaml /gm-be-api-spec.json get /v1/limits/session openapi: 3.0.4 info: title: GM Backend API description: An API spec for the Ondo GM Backend API. version: 1.0.0 servers: - url: https://api.gm.ondo.finance description: GM Backend API security: [] tags: - name: Attestations description: Get Mint and Redeem Attestations - name: Assets description: Get Asset Price Information - name: Tickers description: Get Ticker Information - name: Chains description: Get On Chain Data - name: Limits description: Get Trading Limits - name: Status description: Get Market and Trading Statuses paths: /v1/limits/session: get: tags: - Limits summary: Get Session Limits description: > Provides theoretical maximum asset-specific trading limits for each trading session. These limits are per-user, not global. This API reflects Ondo's statically defined limits; for dynamic, real-time values, see [Get Trading Limits](https://docs.ondo.finance/api-reference/limits/get-trading-limits)) Limits: - The "Max Attestation Count" limits the number of non-expired, non-executed attestations. For example if the limit is 50, and a user has 50 outstanding attestations, they must wait for one to execute or expire before requesting another. - The "Max Active Notional Value" limit is based on the dollar value of outstanding attestations. That is, if a user has a limit of \$1,000,000, and has 30 non-expired, non-filled attestations at a value of \$999,000, they will not be able to request another attestation for \$1000. For caching details on this endpoint, please see: [Endpoint Caching](https://docs.ondo.finance/api-reference/endpoint-caching). operationId: getSessionLimits parameters: - name: symbol in: query description: The GM token symbol. example: AAPLon schema: type: string responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/SessionLimitsResponse' example: - limits: - symbol: AAPLon premarket: tradable: true maxAttestationCount: '500' maxActiveNotionalValue: '10000' regular: tradable: true maxAttestationCount: '500' maxActiveNotionalValue: '200000' postmarket: tradable: true maxAttestationCount: '500' maxActiveNotionalValue: '200000' overnight: tradable: true maxAttestationCount: '500' maxActiveNotionalValue: '200000' - ... timestamp: 1769192550134 '400': description: >- One of the request parameters is invalid. Please see the returned message and documentation for details. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: error: value: message: One of the request parameters is invalid. documentation: https://docs.ondo.finance/api-reference/error-codes code: INVALID_SYMBOL '401': description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: error: value: message: missing API key code: MISSING_API_KEY '404': description: The provided asset symbol does not exist and cannot be found. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: error: value: code: ASSET_NOT_FOUND message: asset not found documentation: https://docs.ondo.finance/api-reference/error-codes '500': description: >- An internal server error occurred. Please see the returned message and documentation for details. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: error: value: message: >- An internal server error occurred. Please see the returned message and documentation for details. code: INTERNAL_ERROR security: - apiKey: [] components: schemas: SessionLimitsResponse: type: object properties: limits: type: array items: $ref: '#/components/schemas/AssetLimits' timestamp: type: number description: >- The Unix timestamp in milliseconds when the trading limits were last updated. example: 1769116067536 required: - limits - timestamp ErrorResponse: type: object properties: message: type: string description: A human-readable message providing more details about the error. documentation: type: string description: A URL to the relevant documentation for this error. code: type: string description: >- A reason code identifying the specific type of error. See the Error Codes reference for a full list of possible values. required: - code - message AssetLimits: type: object properties: symbol: type: string example: AAPLon description: The GM token symbol. premarket: $ref: '#/components/schemas/SessionLimits' regular: $ref: '#/components/schemas/SessionLimits' postmarket: $ref: '#/components/schemas/SessionLimits' overnight: $ref: '#/components/schemas/SessionLimits' required: - symbol - premarket - regular - postmarket - overnight SessionLimits: type: object properties: tradable: type: boolean description: A flag indicating whether trading is enabled during the session. enum: - true - false example: true maxAttestationCount: type: string description: >- The maximum number of active attestations allowed during the session. example: '1000' maxActiveNotionalValue: type: string description: >- The maximum active notional value available to trade during the session, represented as a string-encoded integer. example: '1000000' required: - tradable - maxAttestationCount - maxActiveNotionalValue securitySchemes: apiKey: type: apiKey name: x-api-key in: header ````