# Stack Gems

> Read-only search of 900+ reviewed developer tools, each with a verdict and caveats. Free/OSS first.

- name: com.stackgems/catalog
- version: 1.0.0
- connection class: R0 (autonomous)
- trust: 83/100 flags: no-repository
- quality: 81/100 (new)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.stackgems%2Fcatalog
- tools: https://api.protogrid.dev/v1/servers/com.stackgems%2Fcatalog/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "catalog": {
      "type": "http",
      "url": "https://stackgems.com/api/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 100
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-100% +updated-1d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 81/100 (new)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 86 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 5 of 5 tools declare readOnlyHint or destructiveHint
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: list_categories (destructiveHint); search_gems (destructiveHint); get_gem (destructiveHint); …
- pass `tools.token_cost`: about 738 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: n/a (weight 15)

- n/a `stability.changes`, `stability.rug_pull`: tool history recorded for 1 of the 7 days needed

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 5, about 738 tokens to load them all
- tool set hash: 336e7a817a43f12fc66b4e2bc87edd27
- badge: [![protogrid quality](https://protogrid.dev/badge/com.stackgems/catalog.svg)](https://protogrid.dev/servers/com.stackgems/catalog)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Remotes

- https://stackgems.com/api/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (5)

- `best_for`: Ranked shortlist for a use case or category (e.g. "vector database", "coding agents", "auth", "mcp"), free and open source first, each with verdict and Catch. Falls back to search when no list matches.
- `get_alternatives`: Free and open-source alternatives to a tool from the same category, with verdict and Catch. Works for any slug in the catalog.
- `get_gem`: Full Stack Gems review of one tool by slug: what is good, the Catch, verdict, license, repo health, plus links to its best-of list and alternatives.
- `list_categories`: The catalog vocabulary: stacks (categories), best-of lists with counts, and the tag vocabulary with counts. Use the slugs as filters in search_gems.
- `search_gems`: Search the Stack Gems catalog of reviewed developer tools. Matches name, tagline, verdict, Catch, subcategory and tags. Filters combine with AND. Returns verdict and the first sentence of the Catch for each hit.