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Supports arithmetic, trigonometry, logarithms, factorial, constants (pi, e), powers, roots, and more.\",\n inputSchema: {\n type: \"object\",\n properties: {\n expression: {\n type: \"string\",\n description: \"Math expression to evaluate. Examples: '2^10', 'sin(pi/2)', 'sqrt(144)', 'log(100)', 'factorial(7)', '(3+4)*2/5'\",\n },\n },\n required: [\"expression\"],\n },\n};\n\nexport function calculate(args: Record) {\n const expr = String(args.expression ?? \"\").trim();\n if (!expr) throw new Error(\"'expression' is required\");\n\n try {\n const result = safeEval(expr);\n return {\n expression: expr,\n result,\n formatted: Number.isInteger(result) ? result.toString() : result.toFixed(10).replace(/\\.?0+$/, \"\"),\n };\n } catch (err: unknown) {\n throw new Error(`Calculation failed: ${err instanceof Error ? err.message : String(err)}`);\n }\n}\n\nfunction safeEval(expr: string): number {\n // Sanitize: only allow safe characters\n const sanitized = expr\n .replace(/\\s+/g, \"\")\n .replace(/(\\d+)!/, (_, n) => String(factorial(parseInt(n))))\n .replace(/factorial\$(\\d+)\$/g, (_, n) => String(factorial(parseInt(n))))\n .replace(/pi/gi, String(Math.PI))\n .replace(/\\be\\b/g, String(Math.E))\n .replace(/\\^/g, \"**\")\n .replace(/sqrt\$/g, \"Math.sqrt(\")\n .replace(/cbrt\\(/g, \"Math.cbrt(\")\n .replace(/abs\\(/g, \"Math.abs(\")\n .replace(/sin\\(/g, \"Math.sin(\")\n .replace(/cos\\(/g, \"Math.cos(\")\n .replace(/tan\\(/g, \"Math.tan(\")\n .replace(/asin\\(/g, \"Math.asin(\")\n .replace(/acos\\(/g, \"Math.acos(\")\n .replace(/atan\\(/g, \"Math.atan(\")\n .replace(/log10\\(/g, \"Math.log10(\")\n .replace(/log2\\(/g, \"Math.log2(\")\n .replace(/log\\(/g, \"Math.log(\")\n .replace(/exp\\(/g, \"Math.exp(\")\n .replace(/ceil\\(/g, \"Math.ceil(\")\n .replace(/floor\\(/g, \"Math.floor(\")\n .replace(/round\\(/g, \"Math.round(\")\n .replace(/max\\(/g, \"Math.max(\")\n .replace(/min\\(/g, \"Math.min(\")\n .replace(/pow\\(/g, \"Math.pow(\")\n .replace(/sign\\(/g, \"Math.sign(\")\n .replace(/trunc\\(/g, \"Math.trunc(\")\n .replace(/hypot\\(/g, \"Math.hypot(\");\n\n // Verify only safe characters remain\n if (!/^[0-9\\s\\+\\-\\*\\/\\(\$\\.\\,Math\\.]+$/.test(sanitized.replace(/Math\\.[a-z0-9]+/g, \"\"))) {\n throw new Error(\"Invalid characters in expression\");\n }\n\n const fn = new Function(`\"use strict\"; return (${sanitized})`);\n const result = fn();\n if (typeof result !== \"number\" || !isFinite(result)) {\n throw new Error(`Result is not a finite number: ${result}`);\n }\n return result;\n}\n\nfunction factorial(n: number): number {\n if (n < 0) throw new Error(\"Factorial of negative number\");\n if (n > 170) throw new Error(\"Factorial too large\");\n if (n === 0 || n === 1) return 1;\n let result = 1;\n for (let i = 2; i <= n; i++) result *= i;\n return result;\n}\n","createdAt",["D",1775871165342],"branchVersion","branchId","3d687a94-3546-11f1-8bc9-42b51c65c3df","id","3d67dd8c-3546-11f1-8bc9-42b51c65c3df","mcp-powerserver",["D",1775871121935],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Powerful MCP Server with 8 open-source tools via JSON-RPC 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* MCP Power Server — JSON-RPC 2.0\n * 8 Open-Source Tools: Search, Calculator, SysInfo, Currency, Time, Fetch, Weather, UnitConverter\n */\n\nimport { tools, handleTool } from \"./tools/index.ts\";\n\nconst CORS_HEADERS = {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"GET, POST, OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type, Authorization\",\n};\n\nfunction jsonrpcError(id: unknown, code: number, message: string, data?: unknown) {\n return Response.json(\n { jsonrpc: \"2.0\", id: id ?? null, error: { code, message, ...(data ? { data } : {}) } },\n { headers: { \"Content-Type\": \"application/json\", ...CORS_HEADERS } }\n );\n}\n\nfunction jsonrpcResult(id: unknown, result: unknown) {\n return Response.json(\n { jsonrpc: \"2.0\", id: id ?? null, result },\n { headers: { \"Content-Type\": \"application/json\", ...CORS_HEADERS } }\n );\n}\n\nexport default async function handler(req: Request): Promise {\n // Handle CORS preflight\n if (req.method === \"OPTIONS\") {\n return new Response(null, { status: 204, headers: CORS_HEADERS });\n }\n\n const url = new URL(req.url);\n\n // ── GET / → Server info ──────────────────────────────────────────────\n if (req.method === \"GET\" && url.pathname === \"/\") {\n return Response.json({\n name: \"MCP Power Server\",\n version: \"1.0.0\",\n protocol: \"JSON-RPC 2.0\",\n description: \"Powerful MCP server with 8 open-source tools\",\n tools: tools.map(t => ({ name: t.name, description: t.description })),\n endpoints: {\n rpc: \"POST /rpc\",\n listTools: \"GET /tools\",\n docs: \"GET /\",\n },\n }, { headers: { \"Content-Type\": \"application/json\", ...CORS_HEADERS } });\n }\n\n // ── GET /tools → list all tools ──────────────────────────────────────\n if (req.method === \"GET\" && url.pathname === \"/tools\") {\n return Response.json({ jsonrpc: \"2.0\", id: null, result: { tools } },\n { headers: { \"Content-Type\": \"application/json\", ...CORS_HEADERS } });\n }\n\n // ── POST /rpc → JSON-RPC dispatcher ──────────────────────────────────\n if (req.method === \"POST\" && (url.pathname === \"/rpc\" || url.pathname === \"/\")) {\n let body: unknown;\n try {\n body = await req.json();\n } catch {\n return jsonrpcError(null, -32700, \"Parse error: invalid JSON\");\n }\n\n // Batch support\n if (Array.isArray(body)) {\n const responses = await Promise.all(body.map(item => dispatch(item)));\n return Response.json(responses,\n { headers: { \"Content-Type\": \"application/json\", ...CORS_HEADERS } });\n }\n\n const response = await dispatch(body);\n return Response.json(response,\n { headers: { \"Content-Type\": \"application/json\", ...CORS_HEADERS } });\n }\n\n return jsonrpcError(null, -32601, \"Method not found\", { hint: \"POST /rpc with JSON-RPC 2.0 body\" });\n}\n\nasync function dispatch(body: unknown): Promise {\n if (!body || typeof body !== \"object\" || Array.isArray(body)) {\n return { jsonrpc: \"2.0\", id: null, error: { code: -32600, message: \"Invalid Request\" } };\n }\n\n const req = body as Record;\n const id = req.id ?? null;\n\n if (req.jsonrpc !== \"2.0\") {\n return { jsonrpc: \"2.0\", id, error: { code: -32600, message: \"Invalid Request: jsonrpc must be '2.0'\" } };\n }\n\n const method = req.method as string;\n const params = (req.params ?? {}) as Record;\n\n // ── MCP protocol methods ──────────────────────────────────────────────\n if (method === \"initialize\") {\n return {\n jsonrpc: \"2.0\", id,\n result: {\n protocolVersion: \"2024-11-05\",\n capabilities: { tools: { listChanged: false } },\n serverInfo: { name: \"MCP Power Server\", version: \"1.0.0\" },\n },\n };\n }\n\n if (method === \"notifications/initialized\") {\n return { jsonrpc: \"2.0\", id, result: {} };\n }\n\n if (method === \"tools/list\") {\n return { jsonrpc: \"2.0\", id, result: { tools } };\n }\n\n if (method === \"tools/call\") {\n const toolName = params.name as string;\n const toolArgs = (params.arguments ?? {}) as Record;\n if (!toolName) {\n return { jsonrpc: \"2.0\", id, error: { code: -32602, message: \"Invalid params: missing 'name'\" } };\n }\n try {\n const result = await handleTool(toolName, toolArgs);\n return { jsonrpc: \"2.0\", id, result };\n } catch (err: unknown) {\n const msg = err instanceof Error ? err.message : String(err);\n return { jsonrpc: \"2.0\", id, error: { code: -32603, message: `Tool error: ${msg}` } };\n }\n }\n\n return { jsonrpc: \"2.0\", id, error: { code: -32601, message: `Method not found: ${method}` } };\n}\n","label",[133],"491731fa-3546-11f1-bd01-42b51c65c3df","tools","491732fe-3546-11f1-bd01-42b51c65c3df",2,["D",1775871141505],"directory",[143],"pulls","branches","forks","envVars",{"_156":67,"_158":67},"connections",{"_156":67,"_157":67},"count","unfilledCount","emptyCount",{"_47":142,"_37":143,"_35":144,"_134":-5,"_45":46,"_44":145,"_136":63,"_42":179,"_13":67,"_39":147,"_40":-5,"_29":30,"_140":-5,"_164":180,"_32":181},{"_47":175,"_37":38,"_35":36,"_134":144,"_45":46,"_44":14,"_136":63,"_42":176,"_13":67,"_39":26,"_40":41,"_29":30,"_140":-5,"_164":177,"_32":178},{"_47":167,"_37":168,"_35":169,"_134":144,"_45":46,"_44":170,"_136":63,"_42":171,"_13":67,"_39":26,"_40":172,"_29":30,"_140":-5,"_164":173,"_32":174},{"_47":132,"_37":133,"_35":61,"_134":-5,"_45":46,"_44":135,"_136":30,"_42":163,"_13":67,"_39":138,"_40":139,"_29":30,"_140":-5,"_164":165,"_32":166},["D",1775871139413],"children",[],[133],"4f6e3ee0-3546-11f1-bd01-42b51c65c3df","search.ts","4f6e3fa8-3546-11f1-bd01-42b51c65c3df",3,["D",1775871152173],"/**\n * Tool 1 — Web Search (DuckDuckGo Instant Answer + HTML scrape fallback)\n */\nexport const searchTool = {\n name: \"web_search\",\n description: \"Search the web using DuckDuckGo. Returns top results with titles, URLs, and snippets.\",\n inputSchema: {\n type: \"object\",\n properties: {\n query: { type: \"string\", description: \"The search query\" },\n max_results: { type: \"number\", description: \"Max results to return (1–10, default 5)\", default: 5 },\n },\n required: [\"query\"],\n },\n};\n\nexport async function webSearch(args: Record) {\n const query = String(args.query ?? \"\").trim();\n const max = Math.min(Number(args.max_results ?? 5), 10);\n if (!query) throw new Error(\"'query' is required\");\n\n // DuckDuckGo Instant Answer API\n const ddgUrl = `https://api.duckduckgo.com/?q=${encodeURIComponent(query)}&format=json&no_html=1&skip_disambig=1`;\n const res = await fetch(ddgUrl, { headers: { \"User-Agent\": \"MCPPowerServer/1.0\" } });\n if (!res.ok) throw new Error(`DuckDuckGo API error: ${res.status}`);\n const data = await res.json() as Record;\n\n const results: Array<{ title: string; url: string; snippet: string }> = [];\n\n // Abstract (top result)\n if (data.AbstractText && String(data.AbstractText).length > 0) {\n results.push({\n title: String(data.Heading ?? query),\n url: String(data.AbstractURL ?? \"\"),\n snippet: String(data.AbstractText).slice(0, 400),\n });\n }\n\n // Related topics\n const topics = (data.RelatedTopics as Array> | undefined) ?? [];\n for (const t of topics) {\n if (results.length >= max) break;\n if (t.Text && t.FirstURL) {\n results.push({\n title: String(t.Text).split(\" - \")[0].slice(0, 100),\n url: String(t.FirstURL),\n snippet: String(t.Text).slice(0, 300),\n });\n }\n }\n\n return {\n query,\n total_results: results.length,\n results,\n source: \"DuckDuckGo\",\n };\n}\n",[],[143,168],"57485498-3546-11f1-93b6-42b51c65c3df",["D",1775871165342],[],[143,38],["D",1775871141505],[160,161],[143],["D",1775871121935],{"_101":100,"_108":104},{"_101":100,"_102":-5,"_103":104,"_19":59,"_105":106,"_107":30},{"_13":90,"_37":91,"_47":46,"_92":48,"_93":-5,"_94":-5,"_95":-5,"_96":-5,"_97":-5,"_98":49,"_99":100},"ctx",{"_83":-5,"_127":219,"_220":221,"_222":223,"_224":30,"_225":30,"_226":30,"_227":63,"_228":-5,"_229":-7,"_230":-7,"_231":67,"_232":30,"_233":30,"_234":-5,"_235":30,"_236":30,"_237":30,"_238":-5},"ENV",{"_190":191,"_192":193,"_194":91,"_195":196,"_197":198,"_199":200,"_201":202,"_203":204,"_205":206,"_207":208,"_209":210,"_211":212,"_213":214,"_215":216,"_217":218},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

Diff · v4