API
Status: planned, not yet available
A simple JSON API for programmatic token counting is on the v1.1 roadmap. The free tier on this site will always remain the interactive UI; the API tier will require an API key and have published rate limits.
Planned shape
POST https://howmanytokens.io/api/v1/count
Authorization: Bearer YOUR_KEY
Content-Type: application/json
{
"text": "your prompt here",
"models": ["claude-sonnet", "gpt-4o", "gemini-2-5-flash"]
}Response includes per-model token count, confidence label, and current pricing — same data the UI surfaces, in a format suitable for cost-tracking dashboards and CI checks.
Want early access?
Email munkres.clinton@gmail.com with your use case.