Trezor Suite ® – Getting Started™ Developer Portal Developer

Welcome to the Developer Portal for Trezor Suite ®. This guide gets you up and running quickly with the core concepts, SDKs, and APIs needed to integrate Trezor hardware wallet functionality into your app or service. It assumes you know the basics of JavaScript/TypeScript and modern web tooling.

Why integrate with Trezor Suite ®?

Trezor provides secure, open-source hardware wallets that isolate private keys from the internet. Integrating with Trezor Suite lets your users approve transactions and manage cryptographic keys securely using their hardware device while your application handles UX and non-sensitive logic. Use cases include custodial bridges, portfolio apps, payment flows, multi-sig coordination, signing messages, and hardware-backed authentication.

Quick start: web app (5 minutes)

Follow these short steps to connect a Trezor device to a web app using the recommended Trezor Connect / Suite integration approach. This example shows the minimal flow for requesting an account and signing a transaction.

Install the client library (npm / yarn).
Create a secure page served via HTTPS (browsers require secure context for USB/HID access).
Call the library to request device connection and user approval.

// Example (high-level JavaScript)
import TrezorConnect from 'trezor-connect';

TrezorConnect.init({
  manifest: {
    email: 'dev@example.com',
    appUrl: 'https://your-app.example.com'
  }
});

// request public address (user will confirm on device)
const resp = await TrezorConnect.getPublicKey({ path: "m/44'/0'/0'/0/0" });
if (resp.success) {
  console.log('pubkey', resp.payload);
} else {
  console.error('user rejected or error', resp.payload);
}

For transaction signing, prepare the transaction payload on your server, then call the appropriate sign method and instruct the user to confirm on their Trezor device.

SDKs, libraries & architecture

Trezor Suite ® supports several integration layers:

Trezor Connect — web-focused bridge for browser apps. Handles device communication over WebUSB, HID or external Bridge and presents UI dialogs as needed.
Suite API — higher-level endpoints used by Trezor Suite desktop/web; for partners this can be a pattern to replicate core flows (accounts, coin discovery, firmware management).
Hardware protocol — protobuf/gRPC-style messages used by the device firmware. Advanced integrators may implement their own transport layer if required.

Choose Trezor Connect for most web integrations — it reduces complexity and keeps UI consistent and secure.

Security & best practices

Security is paramount when handling crypto hardware. A few rules of thumb:

Never transmit or store private keys or seed phrases. All signing must happen on the hardware device.
Serve your integration over HTTPS and use the manifest information when initializing Connect to enable device prompts that show your app name and URL.
Validate and sanitize any unsigned transaction data returned from client-side code before broadcasting.
Keep dependencies up to date and monitor for security advisories in the Trezor libraries you depend on.

Developer workflow & testing

Testing locally is straightforward with Bridge or with WebUSB-enabled browsers. Use a dedicated test device or a device in safe test mode. For CI you can mock device responses; unit test signing and transport layers separately from user-facing prompts. When you’re ready to ship, make sure your manifest contact email is valid, and provide clear instructions to users about where and when their Trezor will prompt them.

Resources & support

Primary resources you’ll likely need:

Official SDK documentation and API reference (search for Trezor Connect docs in your browser).
Open-source repos (device firmware, libraries) for reference implementations and examples.
Community forums and developer chat for Q&A and integration patterns.

If you run into device or firmware issues, collect reproducible steps, Trezor model, firmware version, and browser/OS details before reaching out to support channels.

Read SDK docs

Top 5 FAQ

1. Do I need a physical Trezor device to develop?

Yes — to test real signing flows you need a physical device. For early development you can mock Trezor responses, but final integration testing must use a device to validate the user approval UX and transport behavior (WebUSB/HID/Bridge).

2. Which transport should I use: WebUSB, HID, or Bridge?

WebUSB provides a seamless browser experience when available; HID is more broadly supported across browsers and platforms. Trezor Connect abstracts transports and will use the best available option. Use Bridge if you need a fallback in restricted environments.

3. How do I request user permission securely?

Initialize Trezor Connect with a valid manifest (email and appUrl). The user will see your app identity on their device when performing sensitive operations. Never attempt to bypass the device confirmation dialog — that’s the core security guarantee.

4. Can Trezor sign any blockchain transaction?

Trezor supports a wide range of coins and token standards through native and third-party integrations. Check the supported coins list in the official docs; for unsupported chains, investigate whether a custom implementation is feasible — but proceed with caution and consult maintainers.

5. What should I do if a user reports a failed transaction?

Collect the device model, firmware version, browser/OS, and the signed transaction payload (if available). Verify transaction construction server-side, confirm nonce and fee fields for the target chain, and reproduce the problem with a test device. If it appears to be a device firmware issue, escalate to the official support channel with full diagnostics.