# CycleCalcs MCP Server

**Canonical:** https://apis.io/apis/cyclecalcs/cyclecalcs-mcp-server/  
**Provider:** CycleCalcs — https://apis.io/providers/cyclecalcs/  
**Base URL:** https://www.cyclecalcs.com/mcp  
**Documentation:** https://www.cyclecalcs.com/api/mcp.html

CycleCalcs MCP Server is one of 30 APIs that [CycleCalcs](https://apis.io/providers/cyclecalcs/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Astronomy, Space, Science, Ephemeris, and Sun. The published artifact set on APIs.io includes API documentation.

Hosted stateless Streamable HTTP MCP server exposing 11 astronomy tools backed by the v2 REST endpoints. Requires Bearer RapidAPI key on every call; basic plan free. Works with Claude Code, custom connectors, and OpenAI Responses API mcp tool.

## Machine-readable artifacts (9)

- **MCPServer** — https://www.cyclecalcs.com/mcp
- **MCPServer** — https://raw.githubusercontent.com/api-evangelist/cyclecalcs/refs/heads/main/mcp/cyclecalcs-mcp.yml
- **ToolCrosswalk** — https://raw.githubusercontent.com/api-evangelist/cyclecalcs/refs/heads/main/mcp/cyclecalcs-tool-crosswalk.yml
- **Documentation** — https://www.cyclecalcs.com/api/mcp.html
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/cyclecalcs/refs/heads/main/apis.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/cyclecalcs/refs/heads/main/arazzo/_index.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/cyclecalcs/refs/heads/main/arazzo/cyclecalcs-eclipse-visibility.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/cyclecalcs/refs/heads/main/arazzo/cyclecalcs-sun-moon-calendar.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/cyclecalcs/refs/heads/main/arazzo/cyclecalcs-tonights-sky.yml

## Other CycleCalcs APIs (12)

- [CycleCalcs Apsides API](https://apis.io/apis/cyclecalcs/cyclecalcs-apsides-api/)
- [CycleCalcs Attribution API](https://apis.io/apis/cyclecalcs/cyclecalcs-attribution-api/)
- [CycleCalcs Conjunctions API](https://apis.io/apis/cyclecalcs/cyclecalcs-conjunctions-api/)
- [CycleCalcs Conventions API](https://apis.io/apis/cyclecalcs/cyclecalcs-conventions-api/)
- [CycleCalcs CycleCalcs Astronomy API API](https://apis.io/apis/cyclecalcs/cyclecalcs-cyclecalcs-astronomy-api-api/)
- [CycleCalcs Cycles API](https://apis.io/apis/cyclecalcs/cyclecalcs-cycles-api/)
- [CycleCalcs Dark Window API](https://apis.io/apis/cyclecalcs/cyclecalcs-dark-window-api/)
- [CycleCalcs Eclipses API](https://apis.io/apis/cyclecalcs/cyclecalcs-eclipses-api/)
- [CycleCalcs Enums API](https://apis.io/apis/cyclecalcs/cyclecalcs-enums-api/)
- [CycleCalcs Equation Of Time API](https://apis.io/apis/cyclecalcs/cyclecalcs-equation-of-time-api/)
- [CycleCalcs Jupiter Moons API](https://apis.io/apis/cyclecalcs/cyclecalcs-jupiter-moons-api/)
- [CycleCalcs Libration API](https://apis.io/apis/cyclecalcs/cyclecalcs-libration-api/)

## Tags

Astronomy, Space, Science, Ephemeris, Sun, Moon, Planets, Eclipses, Time, Calendar, Geolocation, MCP, agent-native

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/cyclecalcs/cyclecalcs-mcp-server/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/cyclecalcs/.