# Every free weather forecast, one call (groundhog.markets)

Blends open weather data into forecasts for places worldwide, served through a search page, API and MCP server.

- Atlas card: https://inite.ai/en/atlas/groundhog.markets
- Site: https://groundhog.markets
- For: People and agents comparing city weather forecasts against Kalshi or Polymarket weather markets
- Categories: analytics
- Use not measured/100 · alive 100/100

## Used for

- check daily high, low and rain forecasts for 77 cities
- compare forecasts against Kalshi or Polymarket weather markets
- search any place for its weather forecast

## Price

Not read yet.

## For developers

- OpenAPI: https://groundhog.markets/openapi.json (13 paths)
- MCP server: markets.groundhog/weather (namespace; open on 2026-10-29, 8 tools)
- Status page: https://groundhog.markets/status
- Read 2026-10-29

## MCP server, measured daily

Server: https://groundhog.markets/mcp, checked every day since 2026-10-29 (4 checks).

- Answered: measuring, 4 daily checks so far
- Median first answer: 315 ms
- Sign-in: none
- Context its tool definitions take: about 1732 tokens (8 tools)
- Tool definitions: B, 88/100
- Failing "params_described": 6 of 8 tools
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-29

---

Source: INITE Atlas, https://inite.ai/en/atlas/groundhog.markets. JSON: https://inite.ai/api/atlas/groundhog.markets. MCP: https://inite.ai/api/mcp (atlas_lookup).