Hashtag Generator API

Generate relevant, high-reach hashtags from any post or topic.

The Hashtag Generator API lets you generate relevant, high-reach hashtags from any post or topic. 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/hashtag \
  -H "Larz-Api-Key: larz_sk_your_key" \
  -H "Content-Type: application/json" \
  -d '{"input":"a launch post about a free AI writing tool"}'

Example response

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

What you can build

• Add a one-click "hashtag" feature to your own app.
• Automate marketing workflows at scale.
• Power internal tools, bots, or batch jobs — generate relevant, high-reach hashtags from any post or topic 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 Hashtag Generator free →