get_source
Retrieve the source code of a smart contract by specifying its address and blockchain network. Integrates with the Bankless Onchain MCP Server for blockchain data access.
Instructions
Gets the source code for a given contract on a specific network
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| contract | Yes | The contract address | |
| network | Yes | The blockchain network (e.g., "ethereum", "base") |
Implementation Reference
- src/operations/contracts.ts:319-365 (handler)The main handler function 'getSource' that performs the API call to retrieve contract source code from the Bankless API.
export async function getSource( network: string, contract: string ): Promise<ContractSourceResponse> { const token = process.env.BANKLESS_API_TOKEN; if (!token) { throw new BanklessAuthenticationError('BANKLESS_API_TOKEN environment variable is not set'); } const endpoint = `${BASE_URL}/chains/${network}/get_source/${contract}`; try { const response = await axios.get( endpoint, { headers: { 'Content-Type': 'application/json', 'X-BANKLESS-TOKEN': `${token}` } } ); return response.data; } catch (error) { if (axios.isAxiosError(error)) { const statusCode = error.response?.status || 'unknown'; const errorMessage = error.response?.data?.message || error.message; if (statusCode === 401 || statusCode === 403) { throw new BanklessAuthenticationError(`Authentication Failed: ${errorMessage}`); } else if (statusCode === 404) { throw new BanklessResourceNotFoundError(`Not Found: ${errorMessage}`); } else if (statusCode === 422) { throw new BanklessValidationError(`Validation Error: ${errorMessage}`, error.response?.data); } else if (statusCode === 429) { // Extract reset timestamp or default to 60 seconds from now const resetAt = new Date(); resetAt.setSeconds(resetAt.getSeconds() + 60); throw new BanklessRateLimitError(`Rate Limit Exceeded: ${errorMessage}`, resetAt); } throw new Error(`Bankless API Error (${statusCode}): ${errorMessage}`); } throw new Error(`Failed to get contract source: ${error instanceof Error ? error.message : String(error)}`); } } - src/operations/contracts.ts:81-84 (schema)Zod schema defining the input parameters for the 'get_source' tool: network and contract address.
export const GetSourceSchema = z.object({ network: z.string().describe('The blockchain network (e.g., "ethereum", "base")'), contract: z.string().describe('The contract address'), }); - src/index.ts:92-96 (registration)Registration of the 'get_source' tool in the list of available tools, specifying name, description, and input schema.
{ name: "get_source", description: "Gets the source code for a given contract on a specific network", inputSchema: zodToJsonSchema(contracts.GetSourceSchema), }, - src/index.ts:180-189 (registration)Dispatch logic in the MCP server request handler that routes 'get_source' calls to the contracts.getSource function.
case "get_source": { const args = contracts.GetSourceSchema.parse(request.params.arguments); const result = await contracts.getSource( args.network, args.contract ); return { content: [{type: "text", text: JSON.stringify(result, null, 2)}], }; }