# 2Captcha — Pipedream Connect

> Captcha Solving Service. 2captcha is a service for solving CAPTCHA. We solve all types of.

- API slug: `_twocaptcha` (use in MCP headers and tool keys)
- Auth: API key (Pipedream-managed)
- Categories: Web & App Development
- Website: https://2captcha.com/
- This page (HTML): https://pipedream.com/apps/twocaptcha
- Tools: 3 actions · 2 triggers

## Connect via MCP (recommended)

- Endpoint: `https://remote.mcp.pipedream.net/v3`
- Headers: `Authorization: Bearer <token>` · `x-pd-project-id` · `x-pd-environment` · `x-pd-external-user-id` · `x-pd-app-slug: _twocaptcha`

```ts
import { Client } from "@modelcontextprotocol/sdk/client/index.js"
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js"
import { PipedreamClient } from "@pipedream/sdk"

const pd = new PipedreamClient({
  projectId: process.env.PIPEDREAM_PROJECT_ID!,
  clientId: process.env.PIPEDREAM_CLIENT_ID!,
  clientSecret: process.env.PIPEDREAM_CLIENT_SECRET!,
  projectEnvironment: "production",
})

const accessToken = await pd.rawAccessToken

const transport = new StreamableHTTPClientTransport(
  new URL("https://remote.mcp.pipedream.net/v3"),
  {
    requestInit: {
      headers: {
        Authorization: `Bearer ${accessToken}`,
        "x-pd-project-id": process.env.PIPEDREAM_PROJECT_ID!,
        "x-pd-environment": "production",
        "x-pd-external-user-id": "{external_user_id}", // any stable ID for this user in your system
        "x-pd-app-slug": "_twocaptcha",
      },
    },
  },
)

const mcp = new Client({ name: "my-agent", version: "1.0.0" })
await mcp.connect(transport)

const { tools } = await mcp.listTools()

// e.g. run Check 2Captcha Account Balance:
const result = await mcp.callTool({
  name: "_twocaptcha-check-account-balance",
  arguments: {},
})
```

Docs: [MCP guide](https://pipedream.com/docs/connect/mcp/developers.md)

## API proxy

For a 2Captcha endpoint with no pre-built tool, the proxy forwards your request with the connected user's credentials attached.

```bash
# The path segment is the target URL, URL-safe base64 encoded:
# https://api.example.com/v1/me

curl "https://api.pipedream.com/v1/connect/{project_id}/proxy/aHR0cHM6Ly9hcGkuZXhhbXBsZS5jb20vdjEvbWU?external_user_id={external_user_id}&account_id=apn_xxxxxxx" \
  -H "Authorization: Bearer {access_token}" \
  -H "x-pd-environment: production"
```

Docs: [API proxy guide](https://pipedream.com/docs/connect/api-proxy.md)

## SDK

```ts
import { PipedreamClient } from "@pipedream/sdk"

const pd = new PipedreamClient({
  projectId: process.env.PIPEDREAM_PROJECT_ID!,
  clientId: process.env.PIPEDREAM_CLIENT_ID!,
  clientSecret: process.env.PIPEDREAM_CLIENT_SECRET!,
  projectEnvironment: "production",
})

const result = await pd.actions.run({
  id: "_twocaptcha-check-account-balance",
  externalUserId: "{external_user_id}", // any stable ID for this user in your system
  configuredProps: {
    _twocaptcha: { authProvisionId: "apn_xxxxxxx" },
  },
})
```

Docs: [Managed auth guide](https://pipedream.com/docs/connect/managed-auth/quickstart.md) · [Tools guide](https://pipedream.com/docs/connect/components.md)

## Actions (3)

### `_twocaptcha-check-account-balance` — Check 2Captcha Account Balance (Read-only)

Get the current account balance from the 2Captcha API. See the documentation

Full schema: https://pipedream.com/apps/twocaptcha/actions/check-account-balance.md

### `_twocaptcha-retrieve-solution` — Retrieve Captcha Solution (Read-only)

Fetch the solution of a previously submitted captcha from the 2Captcha service.

Full schema: https://pipedream.com/apps/twocaptcha/actions/retrieve-solution.md

### `_twocaptcha-submit-captcha` — Submit Captcha for Solving (Write)

Send a new captcha to the 2Captcha service for solving. Required props are clientKey and task object.

Full schema: https://pipedream.com/apps/twocaptcha/actions/submit-captcha.md

## Triggers (2)

### `_twocaptcha-balance-updated` — New 2Captcha Balance Updated (Polling)

Emit new event when the user's balance in 2Captcha API is changed.

Full schema: https://pipedream.com/apps/twocaptcha/triggers/balance-updated.md

### `_twocaptcha-captcha-solved` — New Captcha Solved (Polling)

Emit new event when a captcha has been successfully solved by the 2Captcha service.

Full schema: https://pipedream.com/apps/twocaptcha/triggers/captcha-solved.md

---

- All apps: https://pipedream.com/apps — index: https://pipedream.com/llms.txt
- Pipedream docs for agents: https://pipedream.com/docs/llms.txt