> ## Documentation Index
> Fetch the complete documentation index at: https://docs.etherscan.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Verify Solidity Source Code

> Submit a Solidity source code for verification.

export const chain = '1';

<ResponseExample>
  ```json Response theme={null}
  {
      "status": "1",
      "message": "OK",
      "result": "a7lpxkm9kpcpicx7daftmjifrfhiuhf5vqqnawhkfhzfrcpnxj"
  }
  ```
</ResponseExample>


## OpenAPI

````yaml openapi/api-reference/endpoint/verifysourcecode.json POST /v2/api
openapi: 3.1.0
info:
  title: Verify Solidity Source Code
  version: 2.0.0
  description: Submit a Solidity source code for verification.
  license:
    name: Etherscan API Terms
    url: https://etherscan.io/terms
servers:
  - url: https://api.etherscan.io
    description: Etherscan API.
security:
  - apiKey: []
paths:
  /v2/api:
    post:
      summary: Verify Solidity Source Code
      description: Submit a Solidity source code for verification.
      operationId: postVerifysourcecode
      parameters:
        - name: chainid
          in: query
          required: true
          description: >-
            Chain ID to query, eg 1 for Ethereum, 8453 for Base from our
            supported chains.
          schema:
            type: string
          example: '1'
        - name: module
          in: query
          required: true
          description: Set to contract for this endpoint.
          schema:
            type: string
            default: contract
          example: contract
        - name: action
          in: query
          required: true
          description: Set to verifysourcecode for this endpoint.
          schema:
            type: string
            default: verifysourcecode
          example: verifysourcecode
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              properties:
                contractaddress:
                  type: string
                  examples:
                    - '0xBB9bc244D798123fDe783fCc1C72d3Bb8C189413'
                  description: The address where the contract is deployed.
                sourceCode:
                  type: string
                  description: The Solidity source code to verify.
                codeformat:
                  type: string
                  examples:
                    - solidity-standard-json-input
                  description: >-
                    Use `solidity-single-file` for a single file or
                    `solidity-standard-json-input` for JSON input.
                contractname:
                  type: string
                  examples:
                    - contracts/Verified.sol:Verified
                  description: >-
                    The contract name, including path if applicable. If
                    `codeformat=solidity-standard-json-input`, then enter
                    contractname as `erc20.sol:erc20`.
                compilerversion:
                  type: string
                  examples:
                    - v0.8.24+commit.e11b9ed9
                  description: Compiler version used for compilation.
                optimizationUsed:
                  type: string
                  examples:
                    - '0'
                  description: >-
                    Required for solidity-single-file verification and when
                    codeformat is omitted or unrecognized. Not required for
                    solidity-standard-json-input.
                runs:
                  type: string
                  examples:
                    - '200'
                  description: Number of optimization runs.
                constructorArguments:
                  type: string
                  examples:
                    - >-
                      00000000000000000000000074271f2282ed7ee35c166122a60c9830354be42a
                  description: Optional constructor arguments used in contract deployment.
                evmVersion:
                  type: string
                  examples:
                    - default
                  description: >-
                    Use compiler `default` or specify an EVM version such as
                    `byzantium`, `shanghai`.
                licenseType:
                  type: string
                  examples:
                    - '1'
                  description: >-
                    The [open source
                    license](https://etherscan.io/contract-license-types) to
                    associate with the verified source code, e.g `3` for MIT.
              required:
                - contractaddress
                - sourceCode
                - contractname
                - compilerversion
      security:
        - apiKey: []
components:
  securitySchemes:
    apiKey:
      type: apiKey
      in: query
      name: apikey
      description: Your Etherscan API key.

````