cyclecalcs

Read-only astronomy/ephemeris engine providing positional astronomy computations — sun/moon rise-set, moon phases, planet positions, eclipses, seasons, conjunctions, sidereal time, and more — via REST, a hosted MCP server, and llms.txt. Free keyless basic tier with paid tiers via RapidAPI.

{
  "mcpServers": {
    "cyclecalcs": {
      "command": "npx",
      "args": [
        "-y",
        "api-evangelist/cyclecalcs"
      ]
    }
  }
}

claude mcp add cyclecalcs npx -y api-evangelist/cyclecalcs

{
  "mcpServers": {
    "cyclecalcs": {
      "command": "npx",
      "args": [
        "-y",
        "api-evangelist/cyclecalcs"
      ]
    }
  }
}