Stack Gems
REMOTE · STACKGEMS.COM
Read-only search of 900+ reviewed developer tools, each with a verdict and caveats. Free/OSS first.
Available components
Last scanned (21 hours ago)
Scores higher than 66% of remote servers
Unreachable for 1 day in a row. Last reached 3 Nov 2026.
Category Code Search and Documentation
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security11
- TLS not yet verified: we couldn't open a connection to check the certificate. View diagnostics → Unverified
- Authorisation not yet verified: we couldn't confirm whether this endpoint requires it. View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS not yet verified: we couldn't read the response headers to check for it. View diagnostics → Unverified
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability0
- Transport check failed: declared streamable-http, but we couldn't connect to verify it. See how to fix → View diagnostics → Fail
Schema Quality & AI Usability0
- Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.Unverified
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage0
- Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Tool Safety0
- Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Capabilities0
- Capabilities not yet verified: we couldn't read the endpoint's capabilities.Unverified
Unverified: 5 categories
Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 0
- Endpoint reachability: reachable → unreachable ▼ security
- HSTS header: fail → unverified ▼ security
- Authorization: partial → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- TLS certificate: pass → unverified ▼ security
- Stability: 0.50 → unverified ▼ security
- Transport: pass → fail ▼ security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- First check of Schema quality: unverified functional
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.
- 29 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.
- 24 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 22 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 20 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 4 Nov 2026 · Probed https://stackgems.com/api/mcp
TLS unreached
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of stackgems.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| stackgems.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Inconclusive
We could not reach the endpoint well enough to judge its authorisation posture.
| Result | Inconclusive |
|---|
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://stackgems.com/api/mcp | Unreachable | ||
| http (plaintext) | http://stackgems.com/api/mcp | HTTPS enforced |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
best_for Shortlist for a use case ~90
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.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | – |
| use_case | string | yes | What the tool is for, e.g. "self-hosted auth" or "kubernetes" |
No output schema declared.
No examples provided.
get_alternatives Free alternatives to a tool ~58
Free and open-source alternatives to a tool from the same category, with verdict and Catch. Works for any slug in the catalog.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | – |
| slug | string | yes | Tool slug, e.g. "cursor" |
No output schema declared.
No examples provided.
get_gem Get one review ~65
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.
| Name | Type | Req | Description |
|---|---|---|---|
| slug | string | yes | Tool slug, e.g. "ollama" (from search_gems) |
No output schema declared.
No examples provided.
list_categories List categories and tags ~40
The catalog vocabulary: stacks (categories), best-of lists with counts, and the tag vocabulary with counts. Use the slugs as filters in search_gems.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
search_gems Search developer tools ~156
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.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | – |
| limit | integer | – | – |
| pricing | string | – | – |
| query | string | – | Free text, e.g. "postgres backup" or "browser automation" |
| sort | string | – | curated = free/OSS first |
| subcategory | string | – | Subcategory slug or label, e.g. "coding-agents" |
| tag | string | – | Comma list of tags, all must match (see list_categories), e.g. "mcp,self-host" |
No output schema declared.
No examples provided.
How do I install the Stack Gems MCP server?
Stack Gems is a hosted endpoint at https://stackgems.com/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · stackgems.com
claude mcp add --transport http com-stackgems-catalog 'https://stackgems.com/api/mcp'
What is the Stack Gems MCP server?
Stack Gems is an MCP server listed in the public MCP registry as com.stackgems/catalog. Read-only search of 900+ reviewed developer tools, each with a verdict and caveats. Free/OSS first. This page covers its hosted endpoint (https://stackgems.com/api/mcp).
Is the Stack Gems MCP server safe to use?
Stack Gems scores 76 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Stack Gems MCP server expose?
Stack Gems exposes 5 tools: search_gems, get_gem, best_for, get_alternatives, list_categories. Their descriptions and schemas cost roughly 409 tokens of context every time the server is loaded.
Does the Stack Gems MCP server require authentication?
Its publisher declares no required credentials for Stack Gems. We have not been able to confirm that against the live endpoint, and a server can require authorisation without declaring it here.
Is the Stack Gems MCP server still maintained?
Stack Gems is still listed in the MCP registry, though our most recent checks did not reach this channel. We last reached this channel on 3 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.