index.ts•2.16 kB
import { Parser } from 'expr-eval';
import { FastMCP, type TextContent } from "fastmcp";
import { z } from "zod";
const server = new FastMCP({
name: "Cal Server",
version: "1.0.5",
});
server.addTool({
name: "cal",
description: "Use the expr-eval library to evaluate the input mathematical expression and return the result." +
"\n\nConstant \tDescription\n" +
"E \tThe value of Math.E from your JavaScript runtime\n" +
"PI \tThe value of Math.PI from your JavaScript runtime\n" +
"true \tLogical true value\n" +
"false \tLogical false value",
parameters: z.object({
exp: z.string(),
}),
execute: async (args) => {
return String(calculate(args.exp));
},
});
server.addTool({
name: "getDateByTimestamp",
description: "Convert the provided timestamp to date format",
parameters: z.object({
ts: z.number(),
}),
execute: async (args) => {
return String(getDateByTimestamp(args.ts));
},
});
server.addTool({
name: "batchGetDateByTimestamp",
description: "Batch convert the provided list of timestamps to date format, used for processing multiple timestamps",
parameters: z.object({
tsList: z.array(z.number()),
}),
execute: async (args) => {
let result = batchGetDateByTimestamp(args.tsList);
let ct: TextContent[] = result.map(item => ({
type: "text",
text: item
}))
return {
content: ct,
};
},
});
server.addTool({
name: "getNow",
description: "Get the current timestamp",
parameters: z.object({
}),
execute: async (args) => {
return String(getNow());
},
});
function calculate(expression: string): number {
const parser = new Parser();
return parser.evaluate(expression);
}
function getDateByTimestamp(ts: number) {
return new Date(ts).toLocaleString()
}
function batchGetDateByTimestamp(tsList: number[]) {
return tsList.map(timestamp => getDateByTimestamp(timestamp));
}
function getNow() {
return Date.now();
}
server.start({
transportType: "stdio",
});