# ChronoGate

> Timezone and business-day truth for scheduling agents. Authoritative now in any IANA zone, DST-safe convert, relative expression resolve, and public-holiday-aware business days. Not related to chronogate.io IoT.

## API
- [GET /v1/now?tz=IANA](https://chronogate-self.vercel.app/v1/now?tz=America/Chicago): current UTC + wall time in zone
- [GET /v1/convert?iso=&from=&to=](https://chronogate-self.vercel.app/v1/convert?iso=2026-03-08T08:00:00Z&to=America/Chicago): convert between zones
- [GET /v1/resolve?expr=&tz=](https://chronogate-self.vercel.app/v1/resolve?expr=next%20Tuesday%203pm&tz=America/Chicago): resolve "next Tuesday 3pm", "tomorrow 9am", "in N business days"
- [GET /v1/business-day?date=YYYY-MM-DD&country=US](https://chronogate-self.vercel.app/v1/business-day?date=2026-07-04&country=US): weekend + Nager.Date holidays
- [GET /v1/business-days/add?start=&days=&country=](https://chronogate-self.vercel.app/v1/business-days/add?start=2026-07-02&days=3&country=US): add business days

## MCP
- [Remote MCP endpoint](https://chronogate-self.vercel.app/mcp): Streamable HTTP JSON-RPC (2025-06-18). Tools: now, convert, resolve_expression, is_business_day, add_business_days

## Limits
- Free: 200 calls/day per IP. Over limit → HTTP 402 JSON with a `buy` link. Resets 00:00 UTC.

## Data
- Holidays from Nager.Date public API; if unavailable, weekend logic still works (holiday_source=unavailable).

## Legal
- [Terms](https://chronogate-self.vercel.app/terms.html): operated by ChronoGate

## Paid credits

- $5 = 20,000 calls (one-time pack, no subscription). Buy: https://buy.stripe.com/test_3cIeVec3Hagz6ZBc4VgMw00 (Stripe test mode for now)
- After paying you land on /success, which shows your `cg_` API key once (kept 7 days).
- REST: `Authorization: Bearer cg_...`. MCP: same header on https://chronogate-self.vercel.app/mcp
- 1 credit per call. Unknown key → 401. Empty key or free tier used up → 402 with a `buy` link.