> ## Documentation Index > Fetch the complete documentation index at: https://docs.eco.com/llms.txt > Use this file to discover all available pages before exploring further. # Get Single Quote > Retrieve the best quote for a cross-chain single token swap. Returns detailed pricing, fees, contract addresses, and estimated fulfillment time for the requested swap. This endpoint should only be used for intents intended to be published onchain. ## OpenAPI ````yaml /openapi.json post /api/v3/quotes/single openapi: 3.0.0 info: title: Eco Routes API description: Eco Routes API documentation version: '1.0' contact: {} servers: - url: https://quotes.eco.com description: Production - url: https://quotes-preprod.eco.com description: Preproduction - url: https://quotes.staging.eco.com description: Staging - url: http://localhost:3000 description: Local security: [] tags: [] paths: /api/v3/quotes/single: post: tags: - Quotes V3 summary: Get Single Quote description: >- Retrieve the best quote for a cross-chain single token swap. Returns detailed pricing, fees, contract addresses, and estimated fulfillment time for the requested swap. This endpoint should only be used for intents intended to be published onchain. operationId: QuotesV3Controller_createQuote parameters: [] requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/SingleRequestV3DTO' responses: '200': description: Successfully retrieved quote with pricing and execution details content: application/json: schema: $ref: '#/components/schemas/SingleResponseV3DTO' components: schemas: SingleRequestV3DTO: type: object properties: dAppID: type: string description: Unique identifier for the client application making the request example: my-dapp quoteRequest: description: >- Cross-chain token swap request details including source/destination tokens and addresses allOf: - $ref: '#/components/schemas/QuoteRequestV3DTO' contracts: description: >- Optional contract addresses to use for the cross-chain swap (will use defaults if not specified) allOf: - $ref: '#/components/schemas/QuotesV3RequestContractsDTO' required: - dAppID - quoteRequest SingleResponseV3DTO: type: object properties: data: description: Quote response data allOf: - $ref: '#/components/schemas/QuoteResponseV3DTO' required: - data QuoteRequestV3DTO: type: object properties: sourceChainID: type: number description: Chain ID of the source network where tokens will be sent from example: 1 destinationChainID: type: number description: Chain ID of the destination network where tokens will be received example: 42161 sourceToken: type: string description: Contract address of the token being sent on the source chain example: '0xA0b86a33E6441e45C3b9d1C3D6a0b5be4b7b5b5a' destinationToken: type: string description: >- Contract address of the token to be received on the destination chain example: '0xFF970A61A04b1cA14834A43f5dE4533eBDDB5CC8' sourceAmount: type: string description: >- Amount of source tokens to send, specified as a string representation of a bigint example: '1000000' funder: type: string description: Address that will provide the tokens and pay for the transaction example: '0x742d35Cc6527C92b4A1F3a2a8b1c9b3e8c4c5b2a' refundRecipient: type: string description: >- Address to receive refunds if the intent fails (defaults to funder if not specified) example: '0x742d35Cc6527C92b4A1F3a2a8b1c9b3e8c4c5b2a' recipient: type: string description: Address that will receive the tokens on the destination chain example: '0x8Ba1c0a8B4A4b9e8A9f1a6B7c8d9e0F1234567890' required: - sourceChainID - destinationChainID - sourceToken - destinationToken - sourceAmount - funder - recipient QuotesV3RequestContractsDTO: type: object properties: sourcePortal: type: string description: >- Contract address for the intent source (where intents are created and managed) example: '0x1234567890abcdef1234567890abcdef12345678' destinationPortal: type: string description: >- Contract address for the inbox (receives and processes cross-chain messages) example: '0x567890abcdef1234567890abcdef1234567890ab' prover: type: string description: >- Contract address for the prover (handles cross-chain proof verification) example: '0xabcdef1234567890abcdef1234567890abcdef12' QuoteResponseV3DTO: type: object properties: quoteResponse: description: >- Detailed quote information including tokens, amounts, fees, and timing allOf: - $ref: '#/components/schemas/QuoteResponseDataV3DTO' contracts: description: Contract addresses required for executing this cross-chain swap allOf: - $ref: '#/components/schemas/QuoteV3ResponseContractsDTO' required: - contracts QuoteResponseDataV3DTO: type: object properties: intentExecutionType: type: string enum: - SELF_PUBLISH - GASLESS description: The execution type for this quote entry example: SELF_PUBLISH sourceChainID: type: number description: Chain ID of the source network where tokens will be sent from example: 1 destinationChainID: type: number description: Chain ID of the destination network where tokens will be received example: 42161 sourceToken: type: string description: Contract address of the token being sent on the source chain example: '0xA0b86a33E6441e45C3b9d1C3D6a0b5be4b7b5b5a' destinationToken: type: string description: >- Contract address of the token to be received on the destination chain example: '0xFF970A61A04b1cA14834A43f5dE4533eBDDB5CC8' sourceAmount: type: string description: >- Amount of source tokens to send, as a string representation of a bigint example: '1000000' destinationAmount: type: string description: >- Amount of destination tokens to be received, as a string representation of a bigint example: '995000' funder: type: string description: Address that will provide the tokens and pay for the transaction example: '0x742d35Cc6527C92b4A1F3a2a8b1c9b3e8c4c5b2a' refundRecipient: type: string description: Address to receive refunds if the intent fails example: '0x742d35Cc6527C92b4A1F3a2a8b1c9b3e8c4c5b2a' recipient: type: string description: Address that will receive the tokens on the destination chain example: '0x8Ba1c0a8B4A4b9e8A9f1a6B7c8d9e0F1234567890' fees: description: >- Array of fees that will be charged for executing this cross-chain swap type: array items: $ref: '#/components/schemas/FeeV3DTO' deadline: type: number description: >- Unix timestamp (in seconds) after which this quote expires and cannot be executed example: 1672531200 estimatedFulfillTimeSec: type: number description: Estimated time in seconds for the cross-chain swap to be completed example: 300 encodedRoute: type: string description: ABI-encoded route data for onchain intent execution example: >- 0x00000000000000000000000000000000000000000000000000000000000000202810ea6d0860ce5315ef2b62b1b580f2b4ef158b76a6ea8f8982600c130e55e70000000000000000000000000000000000000000000000000000000068e56fa2000000000000000000000000b5e58a8206473dc3ab9b8d4d3b0f84c0ba68f8b5000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000001200000000000000000000000000000000000000000000000000000000000000001000000000000000000000000833589fcd6edb6e082dc7c32d4f71b54bda0291300000000000000000000000000000000000000000000000000000000004bd61000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000020000000000000000000000000833589fcd6edb6e08f4c7c32d4f71b54bda02913000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044a9059cbb0000000000000000000000002b2c52b1b63c4bfc7f16910a1734641d8e34de6200000000000000000000000000000000000000000000000000000000004bd61000000000000000000000000000000000000000000000000000000000 required: - intentExecutionType - sourceChainID - destinationChainID - sourceToken - destinationToken - sourceAmount - destinationAmount - funder - refundRecipient - recipient - fees - deadline - estimatedFulfillTimeSec - encodedRoute QuoteV3ResponseContractsDTO: type: object properties: sourcePortal: type: string description: >- Contract address for the intent source (where intents are created and managed) example: '0x1234567890abcdef1234567890abcdef12345678' destinationPortal: type: string description: >- Contract address for the inbox (receives and processes cross-chain messages) example: '0x567890abcdef1234567890abcdef1234567890ab' prover: type: string description: >- Contract address for the prover (handles cross-chain proof verification) example: '0xabcdef1234567890abcdef1234567890abcdef12' required: - sourcePortal - destinationPortal - prover FeeV3DTO: type: object properties: name: type: string description: Name identifier for the fee type example: Solver Fee description: type: string description: Human-readable description of what this fee covers example: Fee paid to the solver for executing the cross-chain swap token: description: Token information for the fee payment allOf: - $ref: '#/components/schemas/TokenInfoV3DTO' amount: type: string description: Fee amount as a string representation of a bigint example: '1000' required: - name - description - token - amount TokenInfoV3DTO: type: object properties: address: type: string description: Contract address of the token example: '0xA0b86a33E6441e45C3b9d1C3D6a0b5be4b7b5b5a' decimals: type: number description: Number of decimal places for the token example: 6 symbol: type: string description: Token symbol or ticker example: USDC required: - address - decimals - symbol ````