> ## Documentation Index > Fetch the complete documentation index at: https://unevenlabs-docs-drift-src-aa153b3060-2d3471a.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Execute Gasless Txs > This API executes gasless transactions ## OpenAPI ````yaml post /execute openapi: 3.0.3 info: title: Cross-chain solver version: 1.0.0 servers: - url: https://api.relay.link description: Mainnet API - url: https://api.testnets.relay.link description: Testnet API security: [] paths: /execute: post: parameters: - schema: type: string in: header name: x-api-key required: true description: >- Required API key for authentication. Contact the team for getting an API Key requestBody: content: application/json: schema: type: object properties: executionKind: type: string description: >- The kind of gasless transaction to execute. Currently supported: rawCalls enum: - rawCalls data: type: object description: Raw call parameters for the gasless transaction properties: chainId: type: integer description: Chain ID of the EVM network to: type: string description: Address of the contract to call data: type: string description: Encoded function call data value: type: string description: ETH value to send with the call (in wei) authorizationList: type: array items: type: object properties: chainId: type: number address: type: string pattern: ^0x[a-fA-F0-9]{40}$ nonce: type: number yParity: type: number r: type: string s: type: string required: - chainId - address - nonce - yParity - r - s description: >- Authorization list for EIP-7702 transactions to be executed on destination chain required: - chainId - to - data - value executionOptions: type: object description: >- Options related to gas fee sponsorship, app referrer and destination calls properties: referrer: type: string description: >- The referrer of the app which is executing the gasless transaction subsidizeFees: type: boolean description: >- If the app should pay for the fees associated with the request destinationChainExecutionData: type: object description: Destination execution data for the gasless transaction properties: calls: type: array minItems: 1 description: Calls to be executed on the destination chain items: type: object properties: to: type: string pattern: ^0x[a-fA-F0-9]{40}$ value: type: string data: type: string pattern: ^0x[a-fA-F0-9]*$ authorizationList: type: array items: type: object properties: chainId: type: number address: type: string pattern: ^0x[a-fA-F0-9]{40}$ nonce: type: number yParity: type: number r: type: string s: type: string required: - chainId - address - nonce - yParity - r - s description: >- Authorization list for EIP-7702 transactions to be executed on destination chain required: - calls required: - subsidizeFees requestId: type: string description: The request ID of the gasless transaction to execute required: - executionKind - data - executionOptions required: true responses: '200': description: Transaction successfully queued for execution content: application/json: schema: description: Transaction successfully queued for execution type: object properties: message: type: string example: Transaction submitted requestId: type: string example: 0xabc123... '400': description: Bad Request - Invalid input or simulation failure content: application/json: schema: description: Bad Request - Invalid input or simulation failure type: object properties: error: type: string example: DELEGATION_REDEEM_FAILED message: type: string example: >- Delegation redemption reverted without data. Verify the signed delegation is unredeemed and matches the current chain, mode, and account. requestId: type: string example: 0xabc123... details: type: object properties: topLevel: type: object properties: type: type: string address: type: string contract: type: string function: type: string selector: type: string error: type: string revertReason: type: string gasUsed: type: string required: - type additionalProperties: false innermost: type: object properties: type: type: string address: type: string contract: type: string function: type: string selector: type: string error: type: string revertReason: type: string gasUsed: type: string required: - type additionalProperties: false path: type: array items: type: object properties: type: type: string address: type: string contract: type: string function: type: string selector: type: string error: type: string revertReason: type: string gasUsed: type: string required: - type additionalProperties: false revert: type: object properties: type: type: string enum: - errorString - panic - customError - unknownCustomError - empty label: type: string example: DELEGATION_REDEEM_FAILED message: type: string example: >- Delegation redemption reverted without data. Verify the signed delegation is unredeemed and matches the current chain, mode, and account. selector: type: string example: '0x08c379a0' name: type: string example: Error args: type: object additionalProperties: type: string rawArgsHex: type: string required: - type - label - message additionalProperties: false required: - topLevel - innermost - path - revert additionalProperties: false '401': description: Unauthorized - Missing or invalid API key content: application/json: schema: description: Unauthorized - Missing or invalid API key type: object properties: error: type: string example: Unauthorized '500': description: Internal Server Error content: application/json: schema: description: Internal Server Error type: object properties: error: type: string example: Internal server error ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.