Get Product Fee Params

### Return the fee parameters for one or more products. **Available to:** All authenticated users **Environments:** Demo, Live **[Rate Limit](/api/authentication#request-rate-limits-and-time-penalties):** 300 requests per hour, 1-second back-off, counts all requests Return the per-contract fee and margin parameters for a set of products. Send a `productIds` array of numeric product IDs in the request body; this field is required. The response is a `params` array containing one `ProductFeeParams` object per resolved product, so it can be requested in a single batch rather than one product at a time. Each `ProductFeeParams` object reports the cost components applied to trading a product, keyed by `productId`. The fee fields are: `clearingFee`, `exchangeFee`, `nfaFee`, `brokerageFee`, `ipFee` (the IP/TT fee), `commission`, and `orderRoutingFee`. Each fee has a paired `*CurrencyId` field (for example, `exchangeCurrencyId`) identifying the currency the amount is denominated in, since fees can settle in different currencies. The object also carries notional-value rates — `commissionNotionalValueBPS` and `exchangeFeeNotionalValueBPS`, expressed in basis points — and the margin requirements `dayMargin`, `nightMargin`, and the structured `fullMargin` (`ProductMargin`). Resolve a `productId` from a contract with the ContractLibrary reads, such as [`contractItem`](/api/rest-api-endpoints/contract-library/contract-item) or [`contractFind`](/api/rest-api-endpoints/contract-library/contract-find). Products without configured fee parameters are omitted from `params` rather than returned with zeroed fields, so the response length can be shorter than the `productIds` request. **Common Failure Scenarios** - The `productIds` array is omitted or empty. - A supplied product ID does not exist; that product is omitted from the response. - The bearer access token is missing or expired. **Error Messages** This endpoint does not return a business `errorText` field. A failed request is signaled by the HTTP status; a successful request returns the `params` array.