> ## Documentation Index > Fetch the complete documentation index at: https://cobo.com/products/agentic-wallet/manual/llms.txt > Use this file to discover all available pages before exploring further. # Estimate transfer fee > This operation estimates the network fee for a token transfer without submitting a transaction. You can use the returned `recommended`, `slow`, and `fast` fee options when constructing the transfer request. ## OpenAPI ````yaml post /api/v1/wallets/{wallet_uuid}/estimate-transfer-fee openapi: 3.1.0 info: title: Cobo Agentic Wallet Service description: Unified wallet engine for human and agent principals version: 1.3.0 servers: [] security: [] paths: /api/v1/wallets/{wallet_uuid}/estimate-transfer-fee: post: tags: - Transactions summary: Estimate transfer fee description: >- This operation estimates the network fee for a token transfer without submitting a transaction. You can use the returned `recommended`, `slow`, and `fast` fee options when constructing the transfer request. operationId: estimate_transfer_fee parameters: - name: wallet_uuid in: path required: true schema: type: string format: uuid description: >- The UUID of the wallet for which to estimate the transfer fee. Retrieve this value from the `id` field returned when the wallet was created. title: Wallet Uuid description: >- The UUID of the wallet for which to estimate the transfer fee. Retrieve this value from the `id` field returned when the wallet was created. - name: X-API-Key in: header required: false schema: title: X-Api-Key type: string nullable: true requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/EstimateTransferFeeRequest' responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/StandardResponse_EstimateTransferFeeRead_' '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/WrappedValidationError' components: schemas: EstimateTransferFeeRequest: properties: dst_addr: type: string maxLength: 255 minLength: 1 title: Dst Addr description: The destination on-chain address. amount: type: string maxLength: 100 minLength: 1 title: Amount description: The transfer amount as a decimal string. token_id: type: string maxLength: 100 minLength: 1 title: Token Id description: The Cobo token ID (for example, `ETH`, `SETH`). Defaults to `SETH`. default: SETH chain_id: title: Chain Id description: The chain ID. Automatically resolved from `token_id` if omitted. type: string maxLength: 100 nullable: true src_addr: title: Src Addr description: >- The source address. If omitted, the wallet's most recently created address for this chain is used. type: string maxLength: 255 nullable: true type: object required: - dst_addr - amount title: EstimateTransferFeeRequest description: Request payload for transfer fee estimation. StandardResponse_EstimateTransferFeeRead_: properties: success: type: boolean title: Success default: true result: $ref: '#/components/schemas/EstimateTransferFeeRead' suggestion: type: string title: Suggestion default: '' message: type: string title: Message default: '' meta: $ref: '#/components/schemas/PaginationMeta' nullable: true type: object required: - result title: StandardResponse[EstimateTransferFeeRead] WrappedValidationError: title: WrappedValidationError type: object required: - success - error properties: success: type: boolean const: false default: false title: Success error: type: object title: Error required: - detail properties: detail: type: array title: Detail items: $ref: '#/components/schemas/ValidationError' EstimateTransferFeeRead: properties: fee_type: title: Fee Type description: The fee model type (for example, `EVM_EIP_1559`, `SOL`). type: string nullable: true token_id: title: Token Id description: The token used to pay fees. type: string nullable: true recommended: $ref: '#/components/schemas/FeeEstimateRead' description: The recommended fee estimate, balancing speed and cost. slow: $ref: '#/components/schemas/FeeEstimateRead' description: A lower-cost fee estimate with slower confirmation. fast: $ref: '#/components/schemas/FeeEstimateRead' description: A higher-cost fee estimate with faster confirmation. type: object title: EstimateTransferFeeRead description: Fee estimation response payload. PaginationMeta: properties: total: title: Total type: integer nullable: true offset: title: Offset type: integer nullable: true limit: title: Limit type: integer nullable: true has_more: title: Has More type: boolean nullable: true after: title: After type: string nullable: true before: title: Before type: string nullable: true type: object title: PaginationMeta description: |- Pagination metadata for list responses. Supports both legacy offset-based and cursor-based pagination. Cursor fields (``has_more``, ``after``, ``before``) are populated for cursor-paginated endpoints. Legacy fields (``offset``, ``limit``) are populated when the caller uses the deprecated ``offset`` parameter. ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type input: title: Input ctx: type: object title: Context type: object required: - loc - msg - type title: ValidationError FeeEstimateRead: properties: max_fee_per_gas: title: Max Fee Per Gas description: The maximum total fee per gas for EIP-1559 transactions, in wei. type: string nullable: true max_priority_fee_per_gas: title: Max Priority Fee Per Gas description: >- The maximum priority fee (tip) per gas for EIP-1559 transactions, in wei. type: string nullable: true gas_limit: title: Gas Limit description: The estimated gas limit for EIP-1559 transactions. type: string nullable: true compute_unit_price: title: Compute Unit Price description: >- The price per compute unit for Solana transactions, in microlamports. type: string nullable: true compute_unit_limit: title: Compute Unit Limit description: The maximum compute units for Solana transactions. type: string nullable: true fee_amount: title: Fee Amount description: The total estimated fee amount as a decimal string. type: string nullable: true type: object title: FeeEstimateRead description: Standardized fee estimate view (supports both EVM and SOL fields). ````