{"slug": "io-github-cyanheads-astronomy-mcp-server-io-github-cyanheads-astronomy-mcp-0-2-7", "title": "io.github.cyanheads/astronomy-mcp-server (io.github.cyanheads/astronomy-mcp-server@0.2.7)", "summary": "Io.github.cyanheads/astronomy-mcp-server, an offline observational astronomy tool providing positions, rise/set times, moon phases, eclipses, and seasons, released version 0.2.7 to the official MCP registry on 2026-08-18. The server, distributed as @cyanheads/astronomy-mcp-server on npm and as a hosted remote over streamable-http, declares 8 environment variables and passed a semantic screen with no manipulation pattern found, though a deterministic conformance probe has not yet been run.", "body_md": "[← Index](/leaderboard)\n\n# io.github.cyanheads/astronomy-mcp-server\n\nOffline observational astronomy: positions, rise/set, moon phases, eclipses, and seasons.\n\nThe current version, v0.2.7, was published to the official MCP registry on 2026-08-18. It is distributed as @cyanheads/astronomy-mcp-server on npm and as a hosted remote over streamable-http, filed under Other by this index, and declares 8 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; [the index's current counts](/stats) put this record in context.\n\n## Using io.github.cyanheads/astronomy-mcp-server in Claude, Cursor, Gemini CLI, Cline, or Zed?\n\nMCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and **HOLDs the call** when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use **Install this server** for that).\n\nRewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less\n\n```\nuv tool install mcpindex-gate && mcpindex-config-wire\n```\n\n[method](/methodology)\n\nSemantic screen found no manipulation pattern in the description. Conformance probe not yet run.\n\n`mcpindex.integrity.description`\n\npassINFOevidence“No malicious instructions found”via static_description\n\n- - Semantic screen only - the deterministic conformance probe has not run on this server\n- - Confidence is reported but not yet calibrated (v1)\n- - Screen reads the tool description, not the live behavior\n- - advisory\n- - registry description only no input schema\n- - screen model 8b\n- - Still current: the description we screened is unchanged, re-checked against the registry\n- - The registry listing (version, packages, links) changed after this screen ran - the description we assessed did not\n\nSemantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page.\n\nOwn this server? [Screen its description →](/screen)\n\n## That verdict was true at screening time (snapshot 2026-08-18).\n\nContracts can change after screening, with no version bump. The gate pins io.github.cyanheads/astronomy-mcp-server’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.\n\n[See your first HOLD in 2 minutes →](/guides/install-the-gate-first-hold)\n\nRelated: [how to trust an MCP server](/guides/how-to-trust-an-mcp-server) · [screen before install](/guides/screen-mcp-server-before-install) · [silent contract drift](/guides/mcp-silent-contract-drift)\n\nPeople vet a server before wiring it in. One line on your project site or docs answers that with an independent record: screening verdict, registry provenance, contract drift history. It stays current as new screens and drift events land.\n\n```\n[Independent trust record for io.github.cyanheads/astronomy-mcp-server](https://mcpindex.ai/server/io-github-cyanheads-astronomy-mcp-server) - screening verdict, registry provenance, and contract drift monitoring.\nIndependent trust record for io.github.cyanheads/astronomy-mcp-server - screening verdict, registry provenance, and contract drift monitoring.\n```\n\nA live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does.\n\n```\n[](https://mcpindex.ai/server/io-github-cyanheads-astronomy-mcp-server)\n![\"mcpindex](\"https://mcpindex.ai/api/v1/badge/io-github-cyanheads-astronomy-mcp-server\")
\n```\n\n`MCP_LOG_LEVEL`\n\nSets the minimum log level for output (e.g., 'debug', 'info', 'warn').\n\n`ASTRONOMY_ENABLE_HORIZONS`\n\nRegister the astronomy_get_ephemeris tool, which fetches small-body and spacecraft ephemerides from JPL Horizons. Off by default; the core is keyless and offline.\n\n`ASTRONOMY_ENABLE_SATELLITES`\n\nRegister the astronomy_get_satellite_passes tool, which predicts visible satellite passes from CelesTrak GP element sets propagated with SGP4. Off by default.\n\n`ASTRONOMY_DEFAULT_TIMEZONE`\n\nFallback IANA timezone for observer-local output when a tool call omits `timezone`. Unset means UTC-only output.\n\n`MCP_HTTP_HOST`\n\nThe hostname for the HTTP server.\n\n`MCP_HTTP_PORT`\n\nThe port to run the HTTP server on.\n\n`MCP_HTTP_ENDPOINT_PATH`\n\nThe endpoint path for the MCP server.\n\n`MCP_AUTH_MODE`\n\nAuthentication mode to use: 'none', 'jwt', or 'oauth'.\n\n`MCP_LOG_LEVEL`\n\nSets the minimum log level for output (e.g., 'debug', 'info', 'warn').\n\n`ASTRONOMY_ENABLE_HORIZONS`\n\nRegister the astronomy_get_ephemeris tool, which fetches small-body and spacecraft ephemerides from JPL Horizons. Off by default; the core is keyless and offline.\n\n`ASTRONOMY_ENABLE_SATELLITES`\n\nRegister the astronomy_get_satellite_passes tool, which predicts visible satellite passes from CelesTrak GP element sets propagated with SGP4. Off by default.\n\n`ASTRONOMY_DEFAULT_TIMEZONE`\n\nFallback IANA timezone for observer-local output when a tool call omits `timezone`. Unset means UTC-only output.\n\n[methodology](/methodology)\n\n[ConnectMachineai.connectmachine/connectmachine](/server/ai-connectmachine-connectmachine)\n\nManage your ConnectMachine contacts, networks, events, and digital business cards.\n\n[DABLOCK AI Visibility Indexai.dablock/visibility-index](/server/ai-dablock-visibility-index)\n\nMeasured share of answer for 24 crypto and Web3 brands. An open dataset, not an audit of your site.\n\n[io.github.cyanheads/bls-labor-mcp-serverio.github.cyanheads/bls-labor-mcp-server](/server/io-github-cyanheads-bls-labor-mcp-server)\n\nFetch US Bureau of Labor Statistics data — CPI, unemployment, wages, JOLTS, and more via MCP.", "url": "https://wpnews.pro/news/io-github-cyanheads-astronomy-mcp-server-io-github-cyanheads-astronomy-mcp-0-2-7", "canonical_source": "https://mcpindex.ai/server/io-github-cyanheads-astronomy-mcp-server", "published_at": "2026-08-18 17:49:19+00:00", "updated_at": "2026-08-18 20:42:51.896621+00:00", "lang": "en", "topics": ["developer-tools", "ai-tools"], "entities": ["io.github.cyanheads/astronomy-mcp-server", "@cyanheads/astronomy-mcp-server", "MCP registry", "mcpindex"], "alternates": {"html": "https://wpnews.pro/news/io-github-cyanheads-astronomy-mcp-server-io-github-cyanheads-astronomy-mcp-0-2-7", "markdown": "https://wpnews.pro/news/io-github-cyanheads-astronomy-mcp-server-io-github-cyanheads-astronomy-mcp-0-2-7.md", "text": "https://wpnews.pro/news/io-github-cyanheads-astronomy-mcp-server-io-github-cyanheads-astronomy-mcp-0-2-7.txt", "jsonld": "https://wpnews.pro/news/io-github-cyanheads-astronomy-mcp-server-io-github-cyanheads-astronomy-mcp-0-2-7.jsonld"}}