Ledger Live Integrations Developer Portal

Build secure Ledger Live integrations with Ledger SDKs, Ledger APIs, sample code, and developer tools. This developer portal focuses on secure integration patterns, testing, signing flows, UX guidance, and production readiness for Ledger Live Integrations.

What are Ledger Live Integrations?

Ledger Live Integrations let developers connect applications, exchanges, custodial services and dApps to Ledger Live workflows while preserving hardware-backed security. Integrations range from simple address verification and account discovery to deep signing workflows for complex DeFi transactions — all routed through a Ledger device for secure signing.

SDKs, APIs and tooling

Use Ledger SDKs to build integrations. Common building blocks include transport layers (USB, BLE), application protocol handlers, and signing helpers that produce device-signed transactions. The developer portal provides SDKs for popular languages, sample code for signing flows, and CLI tooling to run integration tests and simulation environments.

Transport

USB, WebHID, WebUSB, Bluetooth Low Energy for mobile pairing.

Crypto primitives

Deterministic derivation, address discovery, transaction serialization helpers.

Signing flows

Canonical signing, multisig, contract calls and proof-of-authority patterns.

Test harness

Local emulators and testnets to validate integration logic prior to production.

Integration patterns & examples

Common Ledger Live integration patterns include: account discovery (enumerating user accounts), unsigned transaction building (server or client-side), transaction presentation (displaying operation details for user review), and device-assisted signing (the Ledger device signs the final payload). Integrations must always show clear destination addresses, amounts, and contract metadata both in the app UI and on-device to reduce phishing and UX mistakes.

// Example: pseudo-code for building and sending a transaction via Ledger Live integration const tx = buildTransaction({to, from, amount, fee}); const unsigned = serialize(tx); // present unsigned to the user for confirmation // send to device for signing const sig = await ledgerDevice.sign(unsigned); const raw = attachSignature(unsigned, sig); broadcast(raw);

Security best practices

Security is the highest priority for Ledger Live Integrations. Follow these rules: never request or store user recovery phrases; present full transaction details for verification; validate addresses and chain IDs; use replay protection and nonces to prevent double-spend or replay attacks; and perform automated fuzzing and property-based testing for signing logic.

  • Use deterministic derivation and explicit account discovery.
  • Verify contract bytecode and metadata before requesting signatures for contract calls.
  • Reject malformed transactions and use strict schema validation.
  • Implement server-side rate limits and monitoring for integration endpoints.

Testing & CI for integrations

Automated CI and staging environments are essential. Use ledger emulators to run signing tests in CI, integrate end-to-end tests using testnets, and record deterministic golden files for transaction outputs. Create smoke tests that simulate account discovery, signing flows, and edge cases (high fees, gas limit errors, malformed inputs).

UX & user safety

Good UX prevents mistakes. Ensure that your integration surfaces human-readable intent, contract names, and safety warnings. Use on-device verification for critical fields and provide clear recovery instructions. If your integration supports mass actions, require additional confirmations and rate limits to protect users.

Privacy & compliance

Minimize data collection: only store what is necessary for the integration to function. For services offering fiat on-ramps or custody, adhere to local KYC/AML laws and data retention policies. Provide transparent privacy notices and allow users to export and remove their data.

Getting started — quick checklist

  1. Register for developer access and obtain API credentials where required.
  2. Install SDKs and run local emulators for rapid iteration.
  3. Implement transport layer and test account discovery on testnets.
  4. Build signing flows and validate on-device presentation of transaction metadata.
  5. Run CI with emulator-based signing tests and manual hardware device validation before production.

Frequently asked questions

Q1: Do integrations require a Ledger device?

A: To perform signing of private keys and to provide hardware-backed security, a Ledger device is required. You can develop read-only features without a device, but any signing operation must be performed by the hardware device to preserve custody.

Q2: Where can I find SDKs and sample code?

A: The developer portal includes language-specific SDKs, transport examples, and sample signing flows. Use the official SDK packages and review sample integrations to follow recommended security patterns.

Q3: How do I test integrations without risking user funds?

A: Use emulators and testnets. Record golden outputs and run CI tests using ephemeral keys. Never use production seeds or recovery phrases in testing environments.

Q4: What are the main security checks before asking the device to sign?

A: Confirm chain ID, destination address, amount, fee, and any contract call parameters. Validate the transaction structure and ensure the device displays meaningful text for user confirmation.

Q5: Can I integrate Ledger Live with custodial services?

A: Integrations with custodial services are possible but require careful design: maintain separation of custody, follow regulatory requirements, and ensure that private keys are never transmitted to custodial systems without explicit user consent and appropriate legal frameworks.