captchasonic

Official CaptchaSonic library for Node.js and TypeScript environments.

The CaptchaSonic Node.js SDK is a modern, Promise-based library designed for high-throughput automation. It features first-class TypeScript support, multi-transport flexibility, and automatic retry logic.

Works in Node.js and modern browsers.
Compatible with frameworks such as Express, Fastify, React, Next.js, Vue, and Vite.

---

Installation

npm install captchasonic
# or
yarn add captchasonic

---

Quick Start

const { CaptchaSonic } = require("captchasonic");

const solver = new CaptchaSonic("YOUR_API_KEY");

const result = await solver.solveRecaptchaV2({
  images  : [tile1, tile2, tile3],
  question: "traffic lights",
});

console.log(result.typedSolution?.grid?.objects); // [2, 4, 7]

---

Usage — Geetest (nine-grid)

const { CaptchaSonic } = require("captchasonic");

const solver = new CaptchaSonic("YOUR_API_KEY");

async function run() {
  try {
    const result = await solver.solveGeetest({
      type    : "nine",
      question: "Select all bicycles",
      images  : tiles,           // Uint8Array[] | Buffer[] | file paths
    });

    console.log("Solution:", result.typedSolution);
  } catch (err) {
    console.error("Error:", err.message);
  }
}

run();

---

TypeScript

The SDK ships full type definitions for all options and responses.

import { CaptchaSonic } from "captchasonic";
import type { SolveGeetestOptions, SolveOcrOptions } from "captchasonic";

const solver = new CaptchaSonic("YOUR_API_KEY");

const opts: SolveGeetestOptions = {
  type    : "nine",
  question: "Select all bicycles",
  images  : tiles,
};

const result = await solver.solveGeetest(opts);

---

Configuration

const solver = new CaptchaSonic("YOUR_API_KEY", {
  transport?: "grpc"        // Optional. Default: "grpc" — binary HTTP/2. Node.js only.
            | "connect"     // Node.js and browsers — ConnectRPC over fetch.
            | "http",       // Node.js and browsers — plain REST/JSON.

  url?            : string, // Override the API endpoint. Optional.
  baseUrl?        : string, // Alias for url. Optional.
  timeout?        : number, // Request/polling timeout in ms. Default: 30000 / 120000.
  timeoutMs?      : number, // Alias for timeout. Optional.
  pollingInterval?: number, // Polling frequency in ms. Default: 2000.
});

Transport guide:

Transport	Environments	Protocol
grpc	Node.js only	gRPC binary over HTTP/2 — lowest latency
connect	Node.js and browsers	ConnectRPC over fetch
http	Node.js and browsers	Plain REST/JSON over fetch

Browser users: use connect (recommended) or http. Native gRPC requires Node.js.

---

Solve Methods

All methods accept a single typed options object.

solvePopularCaptcha(opts)

await solver.solvePopularCaptcha({
  images      : ImageInput[],
  question    : string,           // e.g. "Select all traffic lights"
  questionType: string,           // "objectClassify" | "objectClick" | "objectDrag" | "grid"
  examples?   : ImageInput[],
  screenshot? : boolean,
  websiteURL? : string,
  websiteKey? : string,
});

solveRecaptchaV2(opts)

await solver.solveRecaptchaV2({
  images      : ImageInput[],
  question    : string,               // "traffic lights" or "/m/015qff"
  questionType: string,               // "split_33" | "33" | "44". Optional.
  websiteURL? : string,               // optional
  websiteKey? : string,               // optional
});

solveGeetest(opts)

await solver.solveGeetest({
  type      : GeetestSubtype,     // "nine" | "click" | "slide" | "match" | "winlinze"
  question? : string,             // required for "nine" and "click"
  images?   : ImageInput[],       // required for "nine", "click", "slide"
  examples? : ImageInput[],
  gtv?      : number,             // Geetest version (e.g. 3)
  websiteURL?: string,
});

// Type aliases also accepted:
// "nine"     → "geetest_nine" | "9"
// "click"    → "geetest_click" | "icon"
// "slide"    → "geetest_slide"
// "match"    → "geetest_match"
// "winlinze" → "geetest_winlinze"

solveOcr(opts)

await solver.solveOcr({
  images        : ImageInput[],
  module?       : "common" | "mtcaptcha" | "bls" | "morocco",
  numeric?      : boolean,
  caseSensitive?: boolean,
  minLength?    : number,
  maxLength?    : number,
  websiteURL?   : string,
});
// Returns: typedSolution.text.texts[0]

solveTikTok(opts)

await solver.solveTikTok({
  type      : "click" | "whirl" | "slide",  // or "tiktok_click" etc.
  question  : string,
  images    : ImageInput[],
  examples? : ImageInput[],                // required for "whirl" and "slide"
  websiteURL?: string,
});

solveBinance(opts)

await solver.solveBinance({
  type      : "grid" | "slide",             // or "binance_grid" etc.
  question? : string,                      // required for "grid"
  images    : ImageInput[],
  examples? : ImageInput[],
  websiteURL?: string,
});

solveSlideImage(opts)

await solver.solveSlideImage({ images: [background, piece] });
// Returns: typedSolution.slide.x — pixel offset

Token Automation Methods

These submit a task and poll until a token is returned (up to 120 s).

await solver.solveTurnstile({ websiteURL, websiteKey, proxy? });
await solver.solvePopularCaptchaToken({ websiteURL, websiteKey, proxy?, metadata? });
await solver.solveRecaptchaV2Token({ websiteURL, websiteKey, proxy? });
await solver.solveRecaptchaV3Token({ websiteURL, websiteKey, proxy? });
await solver.solveCloudflare({ websiteURL, websiteKey, proxy });   // proxy required

---

Account Methods

const balance = await solver.getBalance();   // → number (USD)
await solver.healthCheck();                  // → { healthy: boolean, version: string }

---

Image Input

type ImageInput = Uint8Array | Buffer | string;

// File path — Node.js only
await solver.solveOcr({ images: ["./captcha.png"] });

// Uint8Array — Node.js and browsers
const bytes = new Uint8Array(await fetch(url).then(r => r.arrayBuffer()));
await solver.solveOcr({ images: [bytes] });

// Node.js Buffer
await solver.solveOcr({ images: [fs.readFileSync("captcha.png")] });

grpc sends images as raw binary — zero base64 overhead.
connect and http auto-encode images to base64 before sending.

---

Error Handling

import { CaptchaSonic, SonicError } from "captchasonic";

try {
  const result = await solver.solveGeetest({ type: "nine", question: "bicycles", images });
} catch (err) {
  if (err instanceof SonicError) {
    console.error(err.errorId);   // 1–6
    console.error(err.name);      // "InvalidApiKeyError" | "InsufficientBalanceError" | ...
    console.error(err.message);
  }
}

errorId	name	Meaning
1	InvalidApiKeyError	API key not valid
2	InsufficientBalanceError	Insufficient credits
3	DailyLimitExceededError	Daily quota exceeded
4	MinuteLimitExceededError	Rate limit hit
5	QuotaExceededError	Plan quota exceeded
6	PlanExpiredError	Subscription expired

Transient gRPC errors are retried automatically with exponential backoff — up to 3 attempts.

---

All Exported Types

import type {
  CaptchaSonicOptions,
  SonicClientOptions,
  ImageInput,
  SolvePopularCaptchaOptions,
  SolveRecaptchaV2Options,
  SolveGeetestOptions,
  SolveOcrOptions,
  SolveTikTokOptions,
  SolveBinanceOptions,
  SolveTurnstileOptions,
  SolvePopularCaptchaTokenOptions,
  SolveRecaptchaV2TokenOptions,
  SolveRecaptchaV3TokenOptions,
  SolveCloudflareOptions,
  SolveSlideImageOptions,
  GeetestSubtype,
  TikTokSubtype,
  BinanceSubtype,
  Task,
  CreateTaskResponse,
  GetTaskResultResponse,
} from "captchasonic";

---

Requirements

• Node.js ≥ 18.0.0 — required for grpc transport
• Browser — any modern browser with fetch support; use connect or http transport
• Module format — ES Module ("type": "module")
• Bundlers — Vite, Webpack 5, esbuild, Rollup, Next.js

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License

MIT — see LICENSE