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Rising GitHub repos per topic, ranked by star velocity, plus repos spotted early. Free, read-only.
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emerging Read-only
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.
language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them
how many repositories, 1 to 50 (10 by default)
only this topic's emerging repositories (a slug from list_topics); all topics when empty
compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks
how many places of the ranking to pass over, for the next page (next_offset of the previous answer); 0 by default, at most the number of repositories ranked
Install
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
Run in a terminal
claude mcp add --transport http upstar https://upstar.dev/mcp
Tools (9)
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.
read-only
emerging
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.
| Argument | Type | Description |
|---|---|---|
| lang | string | language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them |
| limit | integer | how many repositories, 1 to 50 (10 by default) |
| topic | string | only this topic's emerging repositories (a slug from list_topics); all topics when empty |
| detail | string | compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks |
| offset | integer | how many places of the ranking to pass over, for the next page (next_offset of the previous answer); 0 by default, at most the number of repositories ranked |
Input schema (JSON)
{
"type": "object",
"properties": {
"lang": {
"enum": [
"en",
"fr"
],
"type": "string",
"description": "language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them"
},
"limit": {
"type": "integer",
"default": 10,
"maximum": 50,
"minimum": 1,
"description": "how many repositories, 1 to 50 (10 by default)"
},
"topic": {
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{0,49}$",
"maxLength": 50,
"minLength": 1,
"description": "only this topic's emerging repositories (a slug from list_topics); all topics when empty"
},
"detail": {
"enum": [
"compact",
"full"
],
"type": "string",
"default": "compact",
"description": "compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks"
},
"offset": {
"type": "integer",
"default": 0,
"maximum": 10000,
"minimum": 0,
"description": "how many places of the ranking to pass over, for the next page (next_offset of the previous answer); 0 by default, at most the number of repositories ranked"
}
},
"additionalProperties": false
}get_collectionA collection's ranking (score = momentum and health with the collection's weights) and its rising newcomers under 90 days old.
read-only
get_collection
A collection's ranking (score = momentum and health with the collection's weights) and its rising newcomers under 90 days old.
| Argument | Type | Description |
|---|---|---|
| lang | string | language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them |
| limit | integer | how many ranked repositories, 1 to 50 (10 by default); newcomers come apart, 10 at most |
| detail | string | compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks |
| offset | integer | how many places of the ranking to pass over, for the next page (next_offset of the previous answer); 0 by default, at most the number of repositories ranked |
| collection* | string | the collection's slug, from list_collections |
Input schema (JSON)
{
"type": "object",
"required": [
"collection"
],
"properties": {
"lang": {
"enum": [
"en",
"fr"
],
"type": "string",
"description": "language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them"
},
"limit": {
"type": "integer",
"default": 10,
"maximum": 50,
"minimum": 1,
"description": "how many ranked repositories, 1 to 50 (10 by default); newcomers come apart, 10 at most"
},
"detail": {
"enum": [
"compact",
"full"
],
"type": "string",
"default": "compact",
"description": "compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks"
},
"offset": {
"type": "integer",
"default": 0,
"maximum": 10000,
"minimum": 0,
"description": "how many places of the ranking to pass over, for the next page (next_offset of the previous answer); 0 by default, at most the number of repositories ranked"
},
"collection": {
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{0,49}$",
"maxLength": 50,
"minLength": 1,
"description": "the collection's slug, from list_collections"
}
},
"additionalProperties": false
}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 Upstar spotted it, its latest release, license, activity and collections. Answers for every repository with an Upstar page, blocked or kept-out ones apart.
read-only
get_repo
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.
| Argument | Type | Description |
|---|---|---|
| lang | string | language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them |
| repo* | string | the repository: owner/name, or its GitHub or Upstar address |
| detail | string | compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks |
Input schema (JSON)
{
"type": "object",
"required": [
"repo"
],
"properties": {
"lang": {
"enum": [
"en",
"fr"
],
"type": "string",
"description": "language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them"
},
"repo": {
"type": "string",
"maxLength": 200,
"minLength": 3,
"description": "the repository: owner/name, or its GitHub or Upstar address"
},
"detail": {
"enum": [
"compact",
"full"
],
"type": "string",
"default": "compact",
"description": "compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks"
}
},
"additionalProperties": false
}list_collectionsUpstar'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.
read-only
list_collections
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.
| Argument | Type | Description |
|---|---|---|
| kind | string | tooling (open-source tools for one job) or alternatives (open-source alternatives to one product); both when empty |
| lang | string | language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them |
| detail | string | compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks |
Input schema (JSON)
{
"type": "object",
"properties": {
"kind": {
"enum": [
"tooling",
"alternatives"
],
"type": "string",
"description": "tooling (open-source tools for one job) or alternatives (open-source alternatives to one product); both when empty"
},
"lang": {
"enum": [
"en",
"fr"
],
"type": "string",
"description": "language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them"
},
"detail": {
"enum": [
"compact",
"full"
],
"type": "string",
"default": "compact",
"description": "compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks"
}
},
"additionalProperties": false
}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. Use a slug with topic_ranking or emerging.
read-only
list_topics
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.
| Argument | Type | Description |
|---|---|---|
| lang | string | language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them |
| detail | string | compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks |
| category | string | only this category's topics (a category slug from an earlier answer) |
Input schema (JSON)
{
"type": "object",
"properties": {
"lang": {
"enum": [
"en",
"fr"
],
"type": "string",
"description": "language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them"
},
"detail": {
"enum": [
"compact",
"full"
],
"type": "string",
"default": "compact",
"description": "compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks"
},
"category": {
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{0,49}$",
"maxLength": 50,
"minLength": 1,
"description": "only this category's topics (a category slug from an earlier answer)"
}
},
"additionalProperties": false
}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 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.
read-only
search
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.
| Argument | Type | Description |
|---|---|---|
| lang | string | language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them |
| limit | integer | how many repositories, 1 to 50 (10 by default) |
| query* | string | words to look for: a repository's name or owner/name, a word of its description, a GitHub topic, a language or a topic's name |
| detail | string | compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks |
Input schema (JSON)
{
"type": "object",
"required": [
"query"
],
"properties": {
"lang": {
"enum": [
"en",
"fr"
],
"type": "string",
"description": "language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them"
},
"limit": {
"type": "integer",
"default": 10,
"maximum": 50,
"minimum": 1,
"description": "how many repositories, 1 to 50 (10 by default)"
},
"query": {
"type": "string",
"maxLength": 100,
"minLength": 2,
"description": "words to look for: a repository's name or owner/name, a word of its description, a GitHub topic, a language or a topic's name"
},
"detail": {
"enum": [
"compact",
"full"
],
"type": "string",
"default": "compact",
"description": "compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks"
}
},
"additionalProperties": false
}spotted_earlyRepositories Upstar ranked before they took off: when and in which topic it first ranked them, their stars then and now. Most grown first.
read-only
spotted_early
Repositories Upstar ranked before they took off: when and in which topic it first ranked them, their stars then and now. Most grown first.
| Argument | Type | Description |
|---|---|---|
| lang | string | language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them |
| limit | integer | how many repositories, 1 to 50 (10 by default) |
| detail | string | compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks |
Input schema (JSON)
{
"type": "object",
"properties": {
"lang": {
"enum": [
"en",
"fr"
],
"type": "string",
"description": "language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them"
},
"limit": {
"type": "integer",
"default": 10,
"maximum": 50,
"minimum": 1,
"description": "how many repositories, 1 to 50 (10 by default)"
},
"detail": {
"enum": [
"compact",
"full"
],
"type": "string",
"default": "compact",
"description": "compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks"
}
},
"additionalProperties": false
}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. 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).
read-only
topic_ranking
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).
| Argument | Type | Description |
|---|---|---|
| lang | string | language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them |
| limit | integer | how many repositories, 1 to 50 (10 by default) |
| topic* | string | the topic's slug, from list_topics or search (rust, self-hosted, emulation…) |
| detail | string | compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks |
| offset | integer | how many places of the ranking to pass over, for the next page (next_offset of the previous answer); 0 by default, at most the number of repositories ranked |
| period | string | day (last 24 hours), week (last 7 days, the default) or month (last 30 days) |
Input schema (JSON)
{
"type": "object",
"required": [
"topic"
],
"properties": {
"lang": {
"enum": [
"en",
"fr"
],
"type": "string",
"description": "language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them"
},
"limit": {
"type": "integer",
"default": 10,
"maximum": 50,
"minimum": 1,
"description": "how many repositories, 1 to 50 (10 by default)"
},
"topic": {
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{0,49}$",
"maxLength": 50,
"minLength": 1,
"description": "the topic's slug, from list_topics or search (rust, self-hosted, emulation…)"
},
"detail": {
"enum": [
"compact",
"full"
],
"type": "string",
"default": "compact",
"description": "compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks"
},
"offset": {
"type": "integer",
"default": 0,
"maximum": 10000,
"minimum": 0,
"description": "how many places of the ranking to pass over, for the next page (next_offset of the previous answer); 0 by default, at most the number of repositories ranked"
},
"period": {
"enum": [
"day",
"week",
"month"
],
"type": "string",
"default": "week",
"description": "day (last 24 hours), week (last 7 days, the default) or month (last 30 days)"
}
},
"additionalProperties": false
}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 in the last 7 days.
read-only
trending
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.
| Argument | Type | Description |
|---|---|---|
| lang | string | language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them |
| sort | string | velocity (stars gained relative to size, the default) or gained (most stars gained, so large repositories show) |
| limit | integer | how many repositories, 1 to 50 (10 by default) |
| detail | string | compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks |
| offset | integer | how many places of the ranking to pass over, for the next page (next_offset of the previous answer); 0 by default, at most the number of repositories ranked |
| period | string | day (last 24 hours), week (last 7 days, the default) or month (last 30 days); new_only is always the week |
| new_only | boolean | only repositories created in the last 7 days, by stars gained this week |
Input schema (JSON)
{
"type": "object",
"properties": {
"lang": {
"enum": [
"en",
"fr"
],
"type": "string",
"description": "language of the names, descriptions and links Upstar writes: en (default at /mcp) or fr (default at /fr/mcp); repository descriptions stay as their authors wrote them"
},
"sort": {
"enum": [
"velocity",
"gained"
],
"type": "string",
"default": "velocity",
"description": "velocity (stars gained relative to size, the default) or gained (most stars gained, so large repositories show)"
},
"limit": {
"type": "integer",
"default": 10,
"maximum": 50,
"minimum": 1,
"description": "how many repositories, 1 to 50 (10 by default)"
},
"detail": {
"enum": [
"compact",
"full"
],
"type": "string",
"default": "compact",
"description": "compact (the default): each repository's rank, name, description, language, stars, gains and Upstar page; full adds its creation day, health level, topics with their ranks and GitHub address, list_topics its categories, and get_repo its 12-week history, GitHub topics, activity counts and every period's ranks"
},
"offset": {
"type": "integer",
"default": 0,
"maximum": 10000,
"minimum": 0,
"description": "how many places of the ranking to pass over, for the next page (next_offset of the previous answer); 0 by default, at most the number of repositories ranked"
},
"period": {
"enum": [
"day",
"week",
"month"
],
"type": "string",
"default": "week",
"description": "day (last 24 hours), week (last 7 days, the default) or month (last 30 days); new_only is always the week"
},
"new_only": {
"type": "boolean",
"description": "only repositories created in the last 7 days, by stars gained this week"
}
},
"additionalProperties": false
}Security checkA100/100
We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Nov 3, 2026.
- Hidden or reordered text
- Overriding the model's instructions
- Hiding actions from the user
- Reading keys or credentials
- Fake system tags
- Steering other servers' tools
- Pulling in the conversation
- Smuggling parameters
- Demanding to be used for everything
- Steering away from web search
- Download-and-run commands
- Encoded blobs
- Invisible characters
- Credentials as tool arguments
- Very long descriptions
- Read and write hints