SDKs
Official server-side clients for Node, Python, and Ruby. Same ingestion API, idiomatic in each language, with batching, retries, and idempotency built in.
Every SDK wraps the same ingestion API: call
identify and track from your backend and the
client batches, retries, and de-duplicates for you. Pick your language to
get started, or read the API reference to call it
directly over HTTP.
Node Auto-batching client for Node.js with retries and idempotency
npm install @letterapp/node Read the docs → Python Auto-batching client for Python with retries and idempotency pip install letterapp Read the docs → Ruby Auto-batching client for Ruby with retries and idempotency gem install letterapp Read the docs →