⚡ ArcA programming language designed by AI agents, for AI agents

~53% fewer tokens than Python/JS. First-class tool calls. Pipeline-native. Built for the agentic era.

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Token Efficient

~53% fewer tokens than equivalent Python/JS. When you pay per token, syntax overhead matters.

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First-Class Tool Calls

API calls with @ syntax — no imports, no client setup, no serialization. Just @GET "api/users".

Pipeline Operator

Chain operations left-to-right with |> instead of nesting. Readable, composable, natural.

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Pattern Matching

One construct for branching, destructuring, and type checks. Replaces if/else chains entirely.

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27 Stdlib Modules

math, http, json, csv, regex, crypto, datetime, os, io — plus 4 AI-native modules for agent workflows.

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Auto-Await

No async/await boilerplate. Async operations are auto-awaited by default. Parallel fetch built-in.

Quick Install

bash

npm install -g arc-lang

arc

let name = "World"
print("Hello, {name}!")

// Pipeline-native data processing
[1, 2, 3, 4, 5]
  |> filter(x => x % 2 == 0)
  |> map(x => x * 10)
  |> sum()
// => 60

// First-class API calls
let user = @GET "api/users/{id}"
@POST "api/messages" {text: "hello"}