Newsletter Writer API

Draft ready-to-send newsletters.

The Newsletter Writer API lets you draft ready-to-send newsletters. programmatically — a single call, structured output, no prompt engineering. It's part of the Larz Tools API and runs on the same Larz API key you use everywhere else.

Endpoint

Example request

curl https://api.larzos.com/v1/tools/newsletter \
  -H "Larz-Api-Key: larz_sk_your_key" \
  -H "Content-Type: application/json" \
  -d '{"input":"a weekly update for a SaaS product's users"}'

Example response

{
  "id": "larz_run_…",
  "object": "tool_result",
  "tool": "newsletter",
  "output": "…generated result…",
  "usage": { "tokens": 180 }
}

What you can build

• Add a one-click "newsletter" feature to your own app.
• Automate marketing workflows at scale.
• Power internal tools, bots, or batch jobs — draft ready-to-send newsletters on demand.

Pricing

Free on the Free tier (200,000 tokens/month, 60 requests/min). Every call returns your remaining quota in the X-Larz-Tokens-Remaining header.

Get an API keyTry Newsletter Writer free →