CycleCalcs

CycleCalcs MCP Server

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.

GitHub

Documentation

📖
Documentation
https://www.cyclecalcs.com/api/mcp.html

Other Resources

🔗
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
🔗
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

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

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API entry from apis.yml

apis.yml Raw ↑ 
name: CycleCalcs MCP Server
description: 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.
humanURL: https://www.cyclecalcs.com/api/mcp.html
baseURL: https://www.cyclecalcs.com/mcp
tags:
- Astronomy
- Space
- Science
- Ephemeris
- Sun
- Moon
- Planets
- Eclipses
- Time
- Calendar
- Geolocation
- MCP
- agent-native
tags_raw:
- Astronomy
- Space
- Science
- Ephemeris
- Sun
- Moon
- Planets
- Eclipses
- Time
- Calendar
- Geolocation
- MCP
- Agent-native
properties:
- type: MCPServer
  url: https://www.cyclecalcs.com/mcp
- type: MCPServer
  name: MCP server manifest (11 tools, captured from tools/list)
  url: mcp/cyclecalcs-mcp.yml
- type: ToolCrosswalk
  name: MCP tool to OpenAPI operation crosswalk
  url: mcp/cyclecalcs-tool-crosswalk.yml
- type: Documentation
  url: https://www.cyclecalcs.com/api/mcp.html