Open Ephemeris
Astrology app for ChatGPT and Claude: real charts from NASA JPL DE440, not AI guesses.
Astrology charts, transits and eclipses from NASA JPL data, 13,200 BC to AD 17,191. Free, no key.
Pick the AI app you use, then copy the settings.
Passed 2/3 checks · What you ask goes through the maker’s server (mcp.naelos.ai) · ✓ Commands checked Nov 13, 2026
First: which AI do you use?
Pick your app and the steps appear below.
Works with Claude · about 2 min
No key, nothing to install · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1 · on Team/Enterprise an Owner adds it
CustomizeConnectors
Copy each value into the field with the same name in Claude, then click Continue
Naelos.aihttps://mcp.naelos.ai/mcpClick Continue past the sign-in settings Claude detected · under Authentication choose what the maker says (Sign in now, Sign in when needed or No sign in), then click Add
+ConnectorsNaelos.ai
Use Naelos.ai and tell me what you can do for me, then show me one thing✓ If Claude says it is using Naelos.ai or shows a Naelos.ai tool in the answer, you are connected
Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with ChatGPT, depending on your plan
Full MCP: ChatGPT Business, Enterprise or Edu on the web · Pro: connects with read/fetch permissions, so tools that change data may not work · Plus: not confirmed in OpenAI’s docs; if you see an add-custom-MCP option on the Plugins page you can try these steps · web only
Plugins+Add custom MCP server
Enter a name, paste the address under Connection, tick the risk warning and click Create as a plugin
Naelos.aihttps://mcp.naelos.ai/mcpStart a new chat and pick Naelos.ai from your plugins before typing
Use Naelos.ai and tell me what you can do for me, then show me one thing✓ If ChatGPT says it is using Naelos.ai or shows a Naelos.ai tool in the answer, you are connected
Menu names checked against OpenAI’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with Claude Code · about 2 min
No key, nothing to install
Mac: press Command+Space and type Terminal · Windows: open PowerShell
claude mcp add --transport http --scope user naelos https://mcp.naelos.ai/mcpYou should see Naelos.ai listed as connected
Use Naelos.ai and tell me what you can do for me, then show me one thing✓ If Claude Code says it is using Naelos.ai or shows a Naelos.ai tool in the answer, you are connected
Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with Cursor · about 2 min
No key, nothing to install
Use Naelos.ai and tell me what you can do for me, then show me one thing✓ If Cursor says it is using Naelos.ai or shows a Naelos.ai tool in the answer, you are connected
Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with VS Code · about 2 min
No key, nothing to install
Use Naelos.ai and tell me what you can do for me, then show me one thing✓ If VS Code says it is using Naelos.ai or shows a Naelos.ai tool in the answer, you are connected
Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.
Address for apps that connect over the web
https://mcp.naelos.ai/mcpJSON settings are under “For developers” below
Claude Code
claude mcp add --transport http --scope user naelos https://mcp.naelos.ai/mcpCursor (~/.cursor/mcp.json)
{
"mcpServers": {
"naelos": {
"url": "https://mcp.naelos.ai/mcp"
}
}
}VS Code (mcp.json)
{
"servers": {
"naelos": {
"type": "http",
"url": "https://mcp.naelos.ai/mcp"
}
}
}These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.
Connect over the internet in
ClaudeChatGPTGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatOpen WebUIRaycast
Tool names and descriptions exactly as the server reported them on Nov 12, 2026. The maker wrote them, not us; we show them as plain text.
natal_chartA complete natal (birth) chart: every planet's sign, degree and house, the Ascendant and Midheaven, retrogrades, and the aspects between planets with exact orbs. Calculated from NASA JPL data by Naelos Ephemeris.
sky_nowWhere every planet is at a moment (now by default): sign, degree, retrograde, and the aspects between them. Give a place to add houses and angles. Works for any date from 13,200 BC to AD 17,191.
planet_positionOne body's tropical position on a date, anywhere from 13,200 BC to AD 17,191, with its speed and whether it is retrograde. For historical and ancient dates; dates before 1582 are proleptic Gregorian.
transitsEvery exact transit of the planets (Sun to Pluto; the Moon is left out as it aspects everything monthly) to a birth chart's planets, Ascendant and Midheaven over a span, with the exact date of each and whether the planet is retrograde. Major aspects: conjunction, sextile, square,
synastryThe aspects between two people's birth charts (each one's planets to the other's), with exact orbs and strength.
returnsThe solar return for a year (the moment the Sun returns to its birth position, the chart for that year) or the most recent lunar return (the last time the Moon reached its birth position), cast for the birthplace or another location.
progressionsThe progressed chart as of today: secondary progressions (a day after birth for each year of life) or solar arc directions (every point moved by the Sun's progressed arc).
timing_eventsBetween two dates: planets changing sign, new and full Moons (and quarters), and retrograde and direct stations, each with its exact moment in UTC. At most two years per call.
eclipsesSolar and lunar eclipses between two dates (up to 20 years per call), with type, the exact moment of greatest eclipse and the eclipse degree. Works across the full 15,000-year span.
naelos_libraryWhich national charts (198) and empire charts (19) Naelos holds, each researched and sourced, with the founding event it is cast for. The charts themselves, with their times, places and readings, are in Naelos's Mundane suite.
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 16, 2026
The registry lists no source repo, so we cannot match the publisher (naelos.ai) to the code
We have not read this repo from GitHub yet
We have not read this repo from GitHub yet
No sign-in needed
Read 10 tool descriptions and found no hidden instructions to the AI
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Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
It passed 2 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
The registry does not list a required key, though some servers ask you to sign in on first use.
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 18 days ago.
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT on the web (full MCP on Business and above; Pro read-only).
In the same category: Open Ephemeris, Kundali Chart — Vedic Astrology MCP, Familiar Tarot, Kundlit Vedic Astrology, Tarot
Same category, other makers, commands already checked. Official ones first, then by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Astrology app for ChatGPT and Claude: real charts from NASA JPL DE440, not AI guesses.
Vedic astrology MCP: 54 tools for charts, dashas, yogas, compatibility, muhurta, transit, remedies.
Free tarot for Claude & your AI — many decks, real card art, a true shuffle, drawn & discussed.
Free Vedic astrology: panchang, kundali, transits, matching, doshas, eclipses, numerology
Значения карт Таро и Ленормана, расчёты Матрицы судьбы и Квадрата Пифагора.
No README found in the repo