MCP Helius

Instructions

Implementation Reference

• src/handlers/helius.ts:115-126 (handler)

  The main handler function implementing the tool logic. Validates the token mint address and fetches the largest token accounts using the Helius RPC connection.

  export const getTokenLargestAccountsHandler = async (input: GetTokenLargestAccountsInput): Promise<ToolResultSchema> => {
    const tokenAddressResult = validatePublicKey(input.tokenAddress);
    if (!(tokenAddressResult instanceof PublicKey)) {
      return tokenAddressResult;
    }
    try {
      const largestAccounts = await (helius as any as Helius).connection.getTokenLargestAccounts(tokenAddressResult, input.commitment);
      return createSuccessResponse(`Token largest accounts: ${JSON.stringify(largestAccounts.value)}`);
    } catch (error) {
      return createErrorResponse(`Error getting token largest accounts: ${error instanceof Error ? error.message : String(error)}`);
    }
  }

• src/tools.ts:79-89 (schema)

  The input schema definition for the tool, specifying parameters tokenAddress (required) and optional commitment.

  {
    name: "helius_get_token_largest_accounts",
    description: "Get the largest token accounts for a specific token mint",
    inputSchema: {
      type: "object",
      properties: {
        tokenAddress: { type: "string" },
        commitment: { type: "string", enum: ["confirmed", "finalized", "processed"] }
      },
      required: ["tokenAddress"]
    }

• src/tools.ts:554-554 (registration)

  The tool registration mapping the name to its handler function in the handlers dictionary.

  "helius_get_token_largest_accounts": getTokenLargestAccountsHandler,