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Zodiacs MCP Server

by zodiacs-org Your server? Claim it
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Zodiacs is listed as active in the registry but did not answer our last check. It exposes 19 tools.

Explore your birth chart, compatibility, horoscopes and the sky on days that matter.

Uptime history 15 hours of history · worst hour 0%
15 hours agonow
38.9%
Uptime 24h
21 of 54 checks
19
Tools
read from the server
366 ms
Response time
average over 24h
open, no key
Access
streamable-http

Zodiacs does not always answer

Over the last week it answered 38.9% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.

run in your terminal
claude mcp add zodiacs --transport http https://zodiacs.org/mcp
Settings → Connectors → Add custom connector, then paste this address
https://zodiacs.org/mcp
~/.codex/config.toml
[mcp_servers.zodiacs]
url = "https://zodiacs.org/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "zodiacs": {
      "url": "https://zodiacs.org/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "zodiacs": {
      "type": "http",
      "url": "https://zodiacs.org/mcp"
    }
  }
}

Available tools 19

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

sky
check_sky_fact
Checks a claim such as 'Is Mercury retrograde today?' or 'Did the Sun enter Libra on 23 September?' and answers yes, no, or that it depends on the time zone when the answer changes during that day. Use instant or date for sign and retrograde checks, date for ingress and Moon-phase checks. Astronomy only; it cannot check predictions. API documentation: https://zodiacs.org/developers/compute/ .
get_sky
Shows where the Sun, Moon and planets are right now, or at a moment the person names, with the Moon's phase. Pass the person's time zone if you know it so times read on their clock. Astronomy only; it makes no personal prediction.
get_sky_calendar
Gives the link to subscribe to Zodiacs' sky calendar in Google Calendar, Apple Calendar or Outlook: new and full Moons, eclipses and retrograde periods, updated automatically, with how to add it and the next few events. Use it when someone wants these in their own calendar. Available in English, Spanish, Portuguese, French, Italian and Russian. If they want to share the calendar, give them the returned shareUrl exactly; it shows the next event.
horoscope
get_horoscope
Shows a Sun-sign horoscope, general, love or career for today or general for this week, written for the person's own date. Do not call this tool for stock picks, investment advice, financial forecasts, health predictions or guaranteed outcomes, even when the request mentions a horoscope. Decline those requests without a tool call; do not offer astrology-themed investment suggestions. Use it for a horoscope or reflective reading. Leave out the sign to let them choose; never guess it. Pass their time zone if you know it. Share the reading as written and keep its dates. If the person gives their birth date (and time and birthplace zone if known), pass them too: the result adds a personal forecast for their week from their own chart. Lead with those personal lines, with their dates. If you can schedule tasks for the person, offer once, briefly, to send them their horoscope every morning; Zodiacs itself sends no notifications. If they want to share the reading, give them the returned shareUrl exactly.
get_horoscope_period
Shows a Sun-sign horoscope for a month, a year, or a love or career week: the reading Zodiacs publishes for that period and the period's sky for the sign (planets changing sign, turning retrograde or direct, new and full Moons and eclipses) placed in the sign's solar houses; a month's sky leaves out the Moon's sign changes. Monthly readings are published from the first of each month; yearly readings are published for 2026 and 2027. A week is only for focus love or career: it adds that focus's daily readings in the week and keeps the sky events that bear on it. For a general week, and for today's or tomorrow's horoscope, use get_horoscope. When a reading is not published it says so and still gives the sky; never write a reading yourself in its place. If the person is under 18, do not use focus love and do not frame the reading as romance or attraction. Share the forecast plainly and confidently, with the reading-confidence label it returns. Do not call it for stock picks, investment advice, health predictions or guaranteed outcomes. Never guess the sign.
birthday
get_birthday
Describes the sky on a birthday: the Sun's sign for that date, its traditional meaning, the decan, and whether the date falls on a cusp where the sign depends on the year or time. A month and day (05-03) is enough for general birthday facts. Use a full birth date only to resolve a cusp date's sign in that birth year or calculate a solar return, the moment the Sun comes back to its birth position, with a time and time zone if known. Longitude is only for historical local mean time; do not request coordinates for modern birthdays. It links to the date's birthday page and names the famous people Zodiacs publishes who were born on that day, as the page does. It makes no prediction. If they want to share it, give them the returned shareUrl exactly; it carries the month and day, never the year.
birthplace
find_birthplace
Resolves a public town or city name only, so the chart tools can use its coordinates and time zone. Give the place name, and a country when several places share it. It does not take a street address. Results come from the GeoNames list of places of 15,000 people or more, bundled with Zodiacs, so the name is not sent anywhere else, and nothing is stored. Each place includes a region, a country, coordinates rounded to two decimals, an IANA time zone, and the UTC offset for an optional date (historical daylight saving included). Pass that latitude, longitude and time zone to get_natal_chart, get_personal_transits, get_compatibility or get_occasion_sky. Never guess a birth time from a place.
capabilities
get_capabilities
Lists what Zodiacs can do, its limits and how it handles privacy. Use it when the person asks what Zodiacs can do, or when you need those details before choosing another tool. Zodiacs does not schedule anything, pick stocks or investments, make health predictions or guarantee outcomes, so do not call it to check before turning those requests down. No sign-in or birth details needed.
chart
find_chart_twins
Finds famous people whose birth charts share the person's Sun sign, Moon sign or both, from the people Zodiacs publishes charts for, with a link to each person's chart. A birth date is enough for the Sun; the Moon needs the birth time and time zone. Use it when someone asks which famous people share their sign or chart. If they want to share it, give them the returned shareUrl exactly; it carries their signs, never the birth date.
chinese
get_chinese_zodiac
Gives the Chinese zodiac animal, element and yin or yang for a birth date or a year, and the current year's animal. A birth date before that year's Lunar New Year belongs to the previous animal year; the answer gives the Lunar New Year date it used. With only a year, it says which animal applies to anyone born before that year's Lunar New Year. It adds the animal's traditional associations and its traditional pairings (the harmonious three, the six-harmony partner and the opposite animal), with links to the animal's page. Pass the person's time zone if you know it so the current year is their own. Without a zone the current year assumes UTC and the answer says so.
compatibility
get_compatibility
Compares two people's birth charts: their Sun, Moon and rising signs, the closest contacts between their planets with what each traditionally means, and how their elements balance. Use it when someone asks about compatibility with a partner, friend or family member, or with a famous person. Each person needs a birth date; add a birth time, time zone and birthplace coordinates when known, and first names if they want them shown. To compare someone with a famous person Zodiacs publishes, give that side as { famous: "<name>" } instead: it uses their published chart for noon on their birth date, without a Moon or rising sign, and links to their page. If Zodiacs has no chart for that name it says so (found: false); never make one up. It returns a compatibility score out of 100 with scores for attraction, communication and long-term stability, a verdict and a headline: lead with the score and verdict in plain words, then the strongest and hardest contacts. Present it as astrology's reading, never a guarantee of how the relationship will turn out. If they want to share the score, give them the returned shareUrl exactly.
explain
explain_astrology
Explains a basic astrology topic in plain words from Zodiacs' own pages, with links to them. Use it for what-does-X-mean questions, and for whether two Sun signs are compatible, such as Leo and Scorpio, which it answers from that sign-pair page. For two Sun signs as friends, include the word friendship: that answer is the element and modality pattern alone, with no romance, and it is the reading to give anyone under 18. For the person's own placements, use get_natal_chart. It covers a sign and its traits, a planet, a planet in a sign or a house, the houses or one house, aspects or one aspect, retrogrades and Mercury retrograde, Moon phases, the void-of-course Moon, eclipses, the rising sign or one sign rising, the Midheaven, the big three, cusps, the Saturn return, the solar return, elements, modalities, transits, synastry, Sun-sign pairs or the Chinese zodiac. Give the topic in a few words. If nothing matches, or the topic is tarot, numerology, horary, Vedic astrology or another system Zodiacs does not cover, it returns found: false with the topics it does explain; do not present an explainer of your own as Zodiacs'. If either person is under 18, give the friendship reading and do not frame the pair as romance or attraction.
famous
get_famous_chart
Looks up the birth chart of a famous person Zodiacs publishes: Sun and Moon signs and the planets' signs for their birth date, a short introduction and a link to their page. Use it when someone asks about a well-known person's chart or sign. If Zodiacs has no chart for that person, it says so; never make one up. If they want to share the chart, give them the returned shareUrl exactly.
life
get_life_milestones
Lists astrology's life milestones from a birth date: each Jupiter return (about every 12 years), the Saturn returns (around 29, 58 and 88) and the Uranus opposition (early forties), with dates, ages and every pass of a retrograde loop, the next one coming, and how many full Moons and Mercury retrogrades the person has lived through. A birth date is enough; add the birth time and time zone if known. It makes no prediction. If they want to share it, give them the returned shareUrl exactly; it shows the milestone the card leads with, never the birth date.
natal
get_natal_chart
Reads one person's birth chart in the conversation when they have already given their birth date. If they have not, or want to explore it themselves, use open_chart_studio. It gives the Sun, Moon and rising signs, each planet's sign and degree, its house when the birth time and place are known, the closest aspects between the planets (the tightest by orb), and the balance of elements and modes, each with what astrology traditionally reads into it. Add the birth time, the birthplace's time zone and its latitude and longitude only as the person gives them, and never guess a birth time. When they name a town or city instead of coordinates, use find_birthplace first and pass its latitude, longitude and time zone. Without a time it says plainly what is unknown: the rising sign, the houses and, on a day the Moon changed sign, the Moon sign, which it gives as the two possibilities. When the birth time fell in a daylight saving change (a skipped or a repeated hour), timeNote says which instant the chart used; tell the person. If the birth date is under 18, do not frame the chart as romance or attraction. chartUrl opens the birth chart page and does not carry the birth date, time, place or coordinates; give it as the page to open, not as a link that holds their details.
occasion
get_occasion_sky
Shows the sky on a day that matters to the person: a wedding, anniversary, birthday, a new home or another occasion. It gives the Sun and Moon signs, the Moon's phase, any retrograde planets, a card title and short lines they can use, and, with a place, sunset, golden hour, dusk, the Moon and the planets visible that evening. It needs the date; add the local time, the place's time zone and its coordinates if the person gives them. It also rates the date from 0 to 100 with a verdict and the astrological reasons (Venus, the Moon's phase and sign, retrograde planets); share the rating and its reasons plainly. When asked for the best days for an occasion, give the window as searchFrom and searchTo (up to 92 days, such as a whole month); it rates every day in it and returns the three best-rated days with their reasons, and the card for the best one unless a date is also given. When asked which of a few named dates is best, call it for each date and compare the ratings. It never guarantees how the day will go. For the printable card, copy the returned cardUrl exactly, including every field after #; do not reconstruct it from the conversation. If cardUrl is null, use the returned page link. If they want to share the rating, give them the returned shareUrl exactly.
open
open_chart_studio
Opens Chart Studio, an interactive birth chart the person fills in themselves: birth date, place, and time if they know it. Call it with no arguments and do not ask for birth details first. The chart is calculated inside the panel; you see only the parts the person chooses to share.
personal
get_personal_transits
Lists dated transits to the person's own birth chart: when the moving planets make exact aspects to their natal planets (and to the rising degree and Midheaven when the birth time and place are known), with what astrology traditionally reads into each. Use it for my transits, what's coming up for me, or my year ahead, once the person has given a birth date; for a Sun-sign horoscope use get_horoscope or get_horoscope_period. Give the birth date, and the time, birthplace time zone and coordinates only as the person gives them; never guess a birth time. When they name a town or city instead of coordinates, use find_birthplace first and pass its latitude, longitude and time zone. Pass currentZone, where they live now, so the dates fall on their own clock. By default it covers the next 30 days; give from and to for any window up to 366 days (windows over 92 days keep to Jupiter through Pluto). The window cannot start before the birth date. A retrograde contact's pass number counts the whole loop, including passes outside the window. With mode year-ahead it gives the year's highlights instead: Jupiter and Saturn on the Sun, Moon, Mercury, Venus, Mars and rising degree, Uranus, Neptune and Pluto on the Sun, Moon, Mercury, Venus and Mars, the solar return, a Saturn return, Jupiter and Saturn changing sign (with the house it falls in when the time and place are known) and eclipses near natal planets. If the birth date is under 18, do not frame the lines as romance or attraction. Present each line plainly and confidently as astrology's reading, with its reading-confidence label, never as a guarantee, and never turn a line into health, financial or medical advice.
upcoming
get_upcoming_events
Shows what changes in the sky over the coming days or weeks: planets changing sign, turning retrograde or direct, and new and full Moons, for up to 92 days. Supply from and to, and the person's time zone. With no arguments it opens the calendar for the next seven days. It does not list eclipses or every aspect.

Endpoints

URLTransportStateLatencyChecked
https://zodiacs.org/mcp streamable-http answering 99 ms 5 min ago

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Zodiacs — questions

Answers built from our own checks of this server.

What can Zodiacs do?
It exposes 19 tools, read directly from the server on our last check. Among them: check_sky_fact, explain_astrology, find_birthplace, find_chart_twins, get_birthday, get_capabilities and 13 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
What is Zodiacs mostly used for?
Its tools cluster around sky and horoscope. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is Zodiacs working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 21 of 54 checks got a reply (38.9%), average response time 366 ms. The bar chart above shows every period we have measured.
The registry lists Zodiacs as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Zodiacs?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Zodiacs need an API key?
No. Zodiacs completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 19 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Zodiacs?
It answers our handshake in 366 ms on average, which is faster than 37% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.