Official SDKs

Full async/await support. ESM and CommonJS. Per-type convenience methods. Zero dependencies beyond built-in fetch.

import { OneCaptchaClient } from '@onecaptcha/sdk';

const client = new OneCaptchaClient({
  apiKey: 'oc_...'
});
const result = await client.solveRecaptchaV2({
  url: 'https://example.com',
  sitekey: '6Le-wvk...',
});
console.log(result.token);

Typed request classes for every captcha type. Type hints throughout. Python 3.8+.

from onecaptcha import (
  OneCaptchaClient, RecaptchaV2
)

client = OneCaptchaClient(api_key="oc_...")
result = client.solve(RecaptchaV2(
    url="https://example.com",
    sitekey="6Le-wvk...",
))
print(result.token)

Idiomatic Go with context support. Typed request structs. Functional options pattern.

client := onecaptcha.New("oc_...")

result, err := client.Solve(
  ctx,
  onecaptcha.RecaptchaV2{
    URL:     "https://example.com",
    SiteKey: "6Le-wvk...",
  },
)

Java 11+ with HttpClient. Builder pattern. Sealed request interfaces with typed records.

var client = OneCaptchaClient
  .builder()
  .apiKey("oc_...")
  .build();

var result = client.solve(
  SolveRequest.RecaptchaV2.of(
    "https://example.com",
    "6Le-wvk..."
  )
);

C++17 with designated initializers. Depends on libcurl. CMake FetchContent or header-only.

onecaptcha::OneCaptchaClient client(
  {.apiKey = "oc_..."}
);

auto result = client.solve(
  onecaptcha::RecaptchaV2{
    .url = "https://example.com",
    .sitekey = "6Le-wvk...",
  }
);

Native Zig with async I/O. Comptime-validated request types. No libc dependency.

const oc = @import("onecaptcha");

var client = try oc.Client.init(
  allocator, io,
  .{ .api_key = "oc_..." },
);

const outcome = try client.solve(
  oc.RecaptchaV2{
    .url = "https://example.com",
    .sitekey = "6Le-wvk...",
  }, .{},
);