Stellara MCP server
online · 100% uptimeio.github.yulo-max/stellara-mcp·v0.6.2Plain-language astrology: birth chart wheel, sun sign, transits and celebrity star matches (en/nl).
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If you have run it, two minutes of your experience saves the next person an afternoon.
Stellara tools (6, 1 write)
write = sends, deletes, buys or postscompare_chartsFreeCompares two birth charts (synastry): the closest aspects between person A's and person B's planets, with orbs and a short, balanced summary. Birth times and places are optional. Instead of person_b you can pass `celebrity` (name or X handle, see list_celebrities) for a playful star match with a score and a share text for X. No predictions, nothing stored.
create_christmas_star_cardwrite actionFreeCreates a festive Christmas card (text plus SVG image) about someone, from their birth date and optional first name: sun sign and life path number, described as character, not prediction. The card text talks about the recipient in the third person (by name, or neutrally without a name). No personal data stored.
get_birth_chartFreeComputes a real birth chart from astronomical positions (tropical zodiac): Sun to Pluto with sign, degree and retrograde flag, major aspects with orbs, and a short character-focused interpretation. Ascendant, Midheaven and Whole Sign houses only when birth time and place are both given. Without a time the Moon is flagged as approximate. No predictions, nothing stored.
get_sun_sign_readingFreeReturns a short, free reading based only on a birth date: sun sign (simple date table) and Pythagorean life path number, with a few sentences about character, written in the third person by default. No predictions, no personal data stored.
get_transitsFreeShows where the planets are now (or on a given UTC date) and which major transits they make to a person's birth chart, with orbs and exact dates, for one day or a 7-day week. Short reflective interpretation, no predictions, nothing stored.
list_celebritiesFreeLists the famous people you can compare charts with in compare_charts (about 1000 most-followed real people on X, birth dates from Wikidata cross-checked with Grokipedia). Optional search query (name, handle or description such as 'singer'); returns up to 25, most followed first. Most are date-only.
Public scan report
scanner v0.1.10 · 2026-10-29 · same rubric, same numbers if you re-run it
- –Code scanremote-only server, no package to scann/a
- Live reliabilityremote reachable in 858ms20/20
- Tool poisoning6 tool descriptions checked15/15
- Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
- Maintenancelast push 8 days ago15/15
- Maintainer identityregistry namespace matches repository owner6/10
Findings (1)
- highWrite-action tools reachable without authentication
auth.open-write
How Stellara compares
Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 79/100
- higher than 58% of 48,255 servers
- Tools
- 6
- the typical server has 7
- Tools that change things
- 17%
- typical: 0%. Fewer write tools means less an agent can break
- Uptime
- 100%
- of our recent checks; the typical remote server answers 100%
- Response time
- 214 ms
- faster than 61% of 30,031 servers
What its tools let an agent do: 5 read · 1 create
Install Stellara in Claude Code, Cursor or VS Code
claude mcp add --transport http stellara-mcp https://mcp.mystellara.com/mcp
What the publisher says
From the Stellara repository's README, as published. We do not edit it. Read it on GitHub
Stellara MCP (free)
Free, read-only MCP server for Stellara. No login, no payment, no database. Variant B: output ends with "Made by Stellara. For self-reflection, not predictions." (Dutch: "Gemaakt door Stellara. ...") and contains no links to mystellara.com. Image and share links use the MCP's own host (mcp.mystellara.com) and carry only computed chart data, never birth data.
Names, descriptions and field descriptions live in src/config.ts; all output texts in src/copy.ts.
This repo is also a Cursor plugin: .cursor-plugin/plugin.json, mcp.json (points to https://mcp.mystellara.com/mcp), skills/stellara-reading/SKILL.md, assets/logo.svg. Check it with npm run validate-plugin.
Endpoints
GET/DELETE /mcp return 405 (no sessions, no SSE stream).
Chart image
GET /chart.png and GET /chart.svg with ?id= (optional lang=nl) return a full natal chart image (1400x1000): cream background, zodiac ring with coloured sign glyphs and degree ticks, Placidus house segments with numbers and cusp degrees, As/Ds/Mc/Ic, planet glyphs with degrees, aspect lines (green harmonious, red tense), element and quality percentages, and a side table of positions and cusps. PNG is rendered with resvg-js (MPL-2.0, used unmodified) and the bundled DejaVu Sans font (fonts/, free licence), so glyphs look the same everywhere. Same rate limit as /mcp, computed per request, nothing stored. The id is random (128 bits); the computed render data is kept server-side in an in-memory LRU (30 days, max 20,000; optional disk copy when CHARTSTOREDIR is a writable volume). Nothing personal is in the URL or in the image. Unknown or expired ids return 404; memory-only links stop working after a restart. The old ?date= form is refused (400). getbirthchart returns this URL as chartimageurl and the chart as a PNG image content block (1000 px wide; MCP hosts reject SVG image blocks with "Could not find MIME for Buffer").
Sharing on X
getbirthchart and comparecharts (with celebrity) return shareurl (an X post intent with text + share page, never an @tag), sharepageurl and shareimageurl.
- GET /s/match?t=…, GET /s/chart?t=…: share page with og: and twitter:card=summarylarge_image, short text and a button to mystellara.com.
- GET /match.png?t=…, GET /chart-card.png?t=…: 1200x675 cards.
- The token t is base64url JSON with only computed results (sign indexes, whole-degree planet longitudes, score, public celebrity name). No birth date, time or place. Nothing is stored or logged.
Famous people
comparecharts accepts celebrity (name, X handle or a typo of it) instead of personb and returns a playful match: score (40 to 98), one-liner, plain sentences, a share text for X linking mystellara.com, and a note that it says nothing about anyone's private life. list_celebrities(query?) lists who is available.
data/celebrities.json holds the 1000 most-followed real people on X, built by scripts/build_celebrities.py: ranking from Wikidata follower counts (P8687 with X user-id qualifier, humans only), birth date P569 (day precision), birthplace P19 with coordinates, cross-checked with Grokipedia. Each entry records the source per field and a confidence (high = both agree, medium = one source, low = conflict, flagged in the output). Birth times only where a birth certificate is published (Obama, Trump); everyone else is date-only (no rising sign or houses, said plainly). Wikidata is CC0.
Reading style
Shortened. The full README is on GitHub.
Nothing above is checked by us. What we check is on the safety report.
Stellara: common questions
- Is Stellara MCP server safe?
- Mostly: it is graded B (79/100). Read the Stellara safety report
- How do I install Stellara?
- It runs remotely at mcp.mystellara.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
- Does Stellara need an API key?
- Not as far as the registry entry and our scan can tell: no credentials are declared or required.
- Is Stellara maintained?
- The last commit was 14 days ago (2026-10-20). The latest release is v0.6.2.
- Is Stellara up?
- 100% of our last 28 checks got an answer. We check remote servers about four times a day.
- How does Stellara compare with other MCP servers?
- safety score 79/100 (higher than 58% of 48,255 servers); tools 6 (the typical server has 7); tools that change things 17% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.