MCP Helius

Instructions

Implementation Reference

• src/handlers/helius.ts:301-308 (handler)

  The handler function that executes the tool logic: calls Helius RPC getRecentPerformanceSamples with optional limit, stringifies the result or returns error.

  export const getRecentPerformanceSamplesHandler = async (input: GetRecentPerformanceSamplesInput): Promise<ToolResultSchema> => {
    try {
      const samples = await (helius as any as Helius).connection.getRecentPerformanceSamples(input.limit);
      return createSuccessResponse(`Recent performance samples: ${JSON.stringify(samples, null, 2)}`);
    } catch (error) {
      return createErrorResponse(`Error getting performance samples: ${error instanceof Error ? error.message : String(error)}`);
    }
  }

• src/tools.ts:254-264 (schema)

  MCP tool definition with name, description, and inputSchema (optional limit: number).

  {
    name: "helius_get_recent_performance_samples",
    description: "Get recent performance samples",
    inputSchema: {
      type: "object",
      properties: {
        limit: { type: "number" }
      },
      required: []
    }
  },

• src/tools.ts:569-569 (registration)

  Registers the tool name to the getRecentPerformanceSamplesHandler in the handlers dictionary.

  "helius_get_recent_performance_samples": getRecentPerformanceSamplesHandler,

• src/handlers/helius.types.ts:143-145 (schema)

  TypeScript type for the handler input, matching the JSON schema.

  export type GetRecentPerformanceSamplesInput = {
    limit?: number;
  }