> ## Documentation Index > Fetch the complete documentation index at: https://docs.kalshi.com/llms.txt > Use this file to discover all available pages before exploring further. # Get Funding Rate Estimate > Returns the estimated funding rate for the current, in-progress funding period. The value is a time-weighted average of the premium index computed over `[last_funding_time, now)`, so it continues to move as new data accumulates through the window and is only finalized at `next_funding_time`. Funding measures the premium over clock-aligned bars of one second or longer, depending on the market. The returned `premium_index` is the premium of the final bar evaluated by this estimate, captured from the same calculation inputs. Its observation timestamp can lag the computation time when input feeds are delayed. It is omitted when that bar has no available premium. The estimate remains provisional until funding is finalized. ## OpenAPI ````yaml /perps_openapi.yaml get /margin/funding_rates/estimate openapi: 3.0.0 info: title: Kalshi Trade API Manual Endpoints version: 0.0.1 description: >- Manually defined OpenAPI spec for endpoints being migrated to spec-first approach servers: - url: https://external-api.kalshi.com/trade-api/v2 description: Production perps REST API server - url: https://external-api.demo.kalshi.co/trade-api/v2 description: Demo perps REST API server security: [] tags: - name: account description: Account information endpoints - name: fcm description: FCM member specific endpoints - name: exchange description: Exchange status and information endpoints - name: market description: Market data endpoints - name: orders description: Order management endpoints - name: order-groups description: Order group management endpoints - name: portfolio description: Portfolio and balance information endpoints - name: risk description: Margin risk metrics, parameters, and limits - name: funding description: Funding rates and payment history - name: fees description: Margin fee schedule - name: exit-triggers description: Stop-loss, take-profit, and trailing-stop triggers on margin positions paths: /margin/funding_rates/estimate: get: tags: - funding summary: Get Funding Rate Estimate description: > Returns the estimated funding rate for the current, in-progress funding period. The value is a time-weighted average of the premium index computed over `[last_funding_time, now)`, so it continues to move as new data accumulates through the window and is only finalized at `next_funding_time`. Funding measures the premium over clock-aligned bars of one second or longer, depending on the market. The returned `premium_index` is the premium of the final bar evaluated by this estimate, captured from the same calculation inputs. Its observation timestamp can lag the computation time when input feeds are delayed. It is omitted when that bar has no available premium. The estimate remains provisional until funding is finalized. operationId: GetMarginFundingRateEstimate parameters: - name: ticker in: query required: true description: Market ticker schema: type: string x-go-type-skip-optional-pointer: true x-oapi-codegen-extra-tags: validate: required responses: '200': description: Funding rate estimate retrieved successfully content: application/json: schema: $ref: '#/components/schemas/GetMarginFundingRateEstimateResponse' '400': $ref: '#/components/responses/BadRequestError' '500': $ref: '#/components/responses/InternalServerError' components: schemas: GetMarginFundingRateEstimateResponse: type: object required: - next_funding_time properties: market_ticker: type: string description: Ticker of the margin market computed_time: type: string format: date-time description: Timestamp when this estimate was computed funding_rate: type: number format: double description: Estimated funding rate for the in-progress period mark_price: $ref: '#/components/schemas/FixedPointDollars' description: Mark price at the time the estimate was computed next_funding_time: type: string format: date-time description: Timestamp of the next scheduled funding event premium_index: type: string description: >- Premium index of the final bar evaluated by this funding estimate, as a signed decimal fraction before time weighting. Captured with the estimate from the same calculation inputs. Omitted when that bar has no available premium. premium_index_ts: type: string format: date-time description: >- Timestamp of the last second of the final bar evaluated by the funding estimate. Can precede computed_time when input feeds are delayed. FixedPointDollars: type: string description: >- Fixed-point US dollar string. Most request fields accept 2-4 decimal places (e.g., "0.56", "0.5600"); responses emit up to 6. Valid quote intervals for a given market are constrained by that market's price level structure. example: '0.5600' ErrorResponse: type: object properties: code: type: string description: Error code message: type: string description: Human-readable error message details: type: string description: Additional details about the error, if available responses: BadRequestError: description: Bad request - invalid input content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' InternalServerError: description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.