Upstar

dev.upstar/upstarupstar.devstreamable-httpv1.0.0Scanned 50 minutes ago

Rising GitHub repos per topic, ranked by star velocity, plus repos spotted early. Free, read-only.

9 tools: 4 change things and 5 only read.

Reads private data · 3
Reads text others write · 0
Can send data out · 0
No findings

Anlyon alternative

4 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

9 tools

Changes things 4Creates or changes something that can be changed back.Claude Code: ask

emergingSmall GitHub repositories (under 1,000 stars a week ago, at least 30 days old) gaining stars at least twice as fast as in a usual week, by that ratio; optionally in one topic.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Small GitHub repositories (under 1,000 stars a week ago, at least 30 days old) gaining stars at least twice as fast as in a usual week, by that ratio; optionally in one topic.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
- title: Emerging repositories
spotted_earlyRepositories Upstar ranked before they took off: when and in which topic it first ranked them, their stars then and now.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Repositories Upstar ranked before they took off: when and in which topic it first ranked them, their stars then and now. Most grown first.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
- title: Spotted early by Upstar
topic_rankingRanks a topic's GitHub repositories by star velocity (stars gained ÷ √stars before) over the last 24 hours, 7 days or 30 days, with the stars each gained.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Ranks a topic's GitHub repositories by star velocity (stars gained ÷ √stars before) over the last 24 hours, 7 days or 30 days, with the stars each gained. Ranks are the topic's own: when one is skipped, left_out says how many repositories Upstar does not show there and why. Page with offset (next_offset).
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
- title: A topic's ranking
trendingThe fastest-rising GitHub repositories across every topic Upstar tracks, by star velocity or by stars gained, over 24 hours, 7 days or 30 days; new_only keeps repositories created …No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
The fastest-rising GitHub repositories across every topic Upstar tracks, by star velocity or by stars gained, over 24 hours, 7 days or 30 days; new_only keeps repositories created in the last 7 days.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
- title: Trending on GitHub

Only reads 5Looks things up and changes nothing.Show 5 read-only tools

get_collectionA collection's ranking (score = momentum and health with the collection's weights) and its rising newcomers under 90 days old.No findings
Why it is in this group
- The name "get_collection" says "get": a word for reading.
Description, as the server wrote it
A collection's ranking (score = momentum and health with the collection's weights) and its rising newcomers under 90 days old.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
- title: A collection's ranking
get_repoOne GitHub repository as Upstar sees it, the same facts as its Upstar page: stars and gains, its usual week, its star total week by week over 12 weeks, its topics and ranks, when U…Reads private dataNo findings
Why it is in this group
- The name "get_repo" says "get": a word for reading.
What it can reach
- private-dataThe name "get_repo" says "get" and "repo": it reads repositories.
- private-dataThe description's first sentence says "repository": it reads repositories.
- private-dataThe input names a repo (input.repo), and the tool reads: it reads repositories.
Description, as the server wrote it
One GitHub repository as Upstar sees it, the same facts as its Upstar page: stars and gains, its usual week, its star total week by week over 12 weeks, its topics and ranks, when Upstar spotted it, its latest release, license, activity and collections. Answers for every repository with an Upstar page, blocked or kept-out ones apart.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
- title: A repository's facts
list_collectionsUpstar's collections: open-source tools that do one job, or alternatives to one product, each ranked by momentum and health.No findings
Why it is in this group
- The name "list_collections" says "list": a word for reading.
Description, as the server wrote it
Upstar's collections: open-source tools that do one job, or alternatives to one product, each ranked by momentum and health. Use a slug with get_collection.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
- title: List Upstar's collections
list_topicsLists the topics Upstar ranks GitHub repositories in (emulation, self-hosted, Rust, MCP…): slug, name, category, description and how many repositories rank in each this week.Reads private dataNo findings
Why it is in this group
- The name "list_topics" says "list": a word for reading.
What it can reach
- private-dataThe description's first sentence says "list" and "repository": it reads repositories.
Description, as the server wrote it
Lists the topics Upstar ranks GitHub repositories in (emulation, self-hosted, Rust, MCP…): slug, name, category, description and how many repositories rank in each this week. Use a slug with topic_ranking or emerging.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
- title: List Upstar's topics
searchUpstar's search, the same as the site's search bar: topics by whole words (a name, slug, GitHub tag, language or keyword equal to the query, then every word of it in the topic's na…Reads private dataNo findings
Why it is in this group
- The name "search" says "search": a word for reading.
What it can reach
- private-dataThe description's first sentence says "repository": it reads repositories.
Description, as the server wrote it
Upstar's search, the same as the site's search bar: topics by whole words (a name, slug, GitHub tag, language or keyword equal to the query, then every word of it in the topic's name, category or description) and every repository with an Upstar page (by name, description, GitHub topics and language; blocked or kept-out ones apart); plain matching, no AI. Repositories: exact name first, then the most stars gained this week.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
- title: Search Upstar

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged untrusted-input or outbound.

Reads private data3: Reads files, mail, messages, databases, secrets, calendars or repositories.; get_repo
list_topics
search
Reads text others write0: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http upstar https://upstar.dev/mcp

claude mcp add --transport http upstar https://upstar.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__upstar__get_collection",
      "mcp__upstar__get_repo",
      "mcp__upstar__list_collections",
      "mcp__upstar__list_topics",
      "mcp__upstar__search"
    ],
    "ask": [
      "mcp__upstar__emerging",
      "mcp__upstar__spotted_early",
      "mcp__upstar__topic_ranking",
      "mcp__upstar__trending"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as upstar. Review it before you use it.

Capability tags behind 3 rules

mcp__upstar__get_repo private-data
mcp__upstar__list_topics private-data
mcp__upstar__search private-data

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/dev.upstar/upstar/verify?hash=a032d122a58b5e25569156844463fbd8850013025b3123b5e4a256990d7fe7de" | jq -e '.changed == false'

Pinned hash a032d122a58b, from Nov 3, 2026, 19:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/dev.upstar/upstar/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

[![anlyon.dev](https://anlyon.dev/badge/dev.upstar/upstar.svg)](https://anlyon.dev/servers/dev.upstar/upstar)

Source: MCP Registry. Synced Nov 3, 2026, 19:17 UTC.