> ## Documentation Index > Fetch the complete documentation index at: https://docs.bags.fm/llms.txt > Use this file to discover all available pages before exploring further. # Create Trade V2 Swap Transaction > Build the unsigned swap transaction for a previously fetched `trade/v2/quote`. Loads the cached quote by `requestId`, enforces that `userPublicKey` matches the quote's `taker`, and assembles a v0 transaction containing the provider instructions, the Bags treasury fee transfer, an optional tracking transfer, and address lookup tables. The fee transfer is a native SOL transfer when `feeMint` is SOL, otherwise an idempotent treasury token account creation plus a checked SPL transfer against the mint's own token program (Token or Token-2022). The taker pays a small amount of rent the first time a given fee mint is collected; the idempotent instruction is a no-op afterward. ## OpenAPI ````yaml POST /trade/v2/swap openapi: 3.1.0 info: title: Bags Public API v2 description: API endpoints for Bags platform version: 2.0.0 contact: name: Bags Support url: https://support.bags.fm servers: - url: https://public-api-v2.bags.fm/api/v1 description: Production server security: - ApiKeyAuth: [] tags: - name: Token Launch description: Endpoints for creating and managing token launches - name: Fee Share description: Endpoints for managing fee sharing configs - name: Fee Share Admin description: >- Endpoints for fee share admin operations including listing, transferring admin authority, and updating configs - name: Analytics description: Endpoints for retrieving token analytics and metadata - name: Fee Claiming description: Endpoints for claiming fees from various sources - name: State description: Endpoints for retrieving on-chain state and derived state - name: Trade description: Endpoints for getting trade quotes and executing token swaps - name: Partner description: Endpoints for managing partner configurations and claiming partner fees - name: Solana description: Endpoints for direct Solana blockchain interactions - name: EVM description: Endpoints for reading Bags EVM token data - name: Robinhood Chain description: Read endpoints for Bags V2 tokens on Robinhood Chain (chain id 4663) - name: Dexscreener description: >- Endpoints for managing Dexscreener token info orders, payments, and image uploads - name: Auth description: Endpoints for retrieving authenticated user information - name: Agent description: Endpoints for AI agent wallet-signature authentication (V2) paths: /trade/v2/swap: post: tags: - Trade summary: Create trade v2 swap transaction description: >- Build the unsigned swap transaction for a previously fetched `trade/v2/quote`. Loads the cached quote by `requestId`, enforces that `userPublicKey` matches the quote's `taker`, and assembles a v0 transaction containing the provider instructions, the Bags treasury fee transfer, an optional tracking transfer, and address lookup tables. The fee transfer is a native SOL transfer when `feeMint` is SOL, otherwise an idempotent treasury token account creation plus a checked SPL transfer against the mint's own token program (Token or Token-2022). The taker pays a small amount of rent the first time a given fee mint is collected; the idempotent instruction is a no-op afterward. requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CreateTradeV2SwapRequest' responses: '200': description: Successfully created trade v2 swap transaction content: application/json: schema: allOf: - $ref: '#/components/schemas/SuccessResponse' - type: object properties: response: $ref: '#/components/schemas/TradeV2SwapTransactionResponse' '400': description: >- Bad request - Quote not found or expired, public key does not match quote, invalid parameters, or the taker wallet cannot hold a token account for the fee mint content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '401': description: Unauthorized - Invalid or missing API key content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '502': description: >- Bad gateway - Failed to resolve the fee mint's token program/decimals, or a provider failure content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: - ApiKeyAuth: [] components: schemas: CreateTradeV2SwapRequest: type: object properties: requestId: type: string description: UUID of a previously fetched trade/v2/quote response userPublicKey: type: string description: >- Public key of the wallet that will sign the swap; must match the quote's taker required: - requestId - userPublicKey SuccessResponse: type: object properties: success: type: boolean example: true response: description: '' required: - success TradeV2SwapTransactionResponse: type: object properties: swapTransaction: type: string description: Unsigned v0 transaction, base58-encoded computeUnitLimit: type: number description: Compute unit limit for the transaction prioritizationFeeLamports: type: number description: Prioritization fee in lamports lastValidBlockHeight: type: number description: Last valid block height for the transaction feeMint: type: string description: Mint the fee is charged in feeSide: type: string enum: - input - output description: >- Which leg pays the fee: 'input' is deducted from amount before the quote, 'output' is skimmed from the quoted proceeds feeLamports: type: string description: >- Total Bags fee in raw base units of feeMint as string to support bigint (only lamports when feeMint is native SOL) revenueLamports: type: string description: >- Treasury share of the fee in raw base units of feeMint as string to support bigint (equals feeLamports; the fee is treasury-only) provider: type: string enum: - jupiter - titan description: Provider that built the transaction required: - swapTransaction - computeUnitLimit - prioritizationFeeLamports - lastValidBlockHeight - feeMint - feeSide - feeLamports - revenueLamports - provider ErrorResponse: type: object properties: success: type: boolean example: false error: type: string description: Error message required: - success - error securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key description: API key authentication. Provide your API key as the header value. ````