Crates
NPM · @PIPEWORX/MCP-CRATES · 2 COMPONENTS
Crates.io MCP — wraps the crates.io REST API v1 (free, no auth)
Available components
Last scanned (5 hours ago)
Scores higher than 87% of npm servers
Category Code Search and Documentation
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security100
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- No production dependencies, so there is no dependency health to assess. View diagnostics → Pass
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to pipeworx-io/mcp-crates). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 4 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability81
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 449 tokens (~89/item across 5 items; 5 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management23
- Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Nov 26 +26
- Malware scan: unverified → pass ▲ security
- Known CVEs: unverified → pass ▲ security
- Dependency health: unverified → pass ▲ functional
- 31 Oct 26 −25
- Known CVEs: pass → unverified ▼ security
- Malware scan: pass → unverified ▼ security
- Dependency health: pass → unverified ▼ functional
- Package version: 0.2.0 → 0.2.1 functional
- 29 Oct 26 82
First indexed and scored.
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 5 Nov 2026 · Analysed npm/@pipeworx/mcp-crates@0.2.1
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | pipeworx-io/mcp-crates |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/pipeworx-io/mcp-crates/.github/workflows/publish.yml@refs/heads/main |
| Rekor log index | 3612283373 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:7d340b9dc4181e305a018716393a394a74bec675b46331bc0e4413badcb30ba56fd838ebbaa157c2ec8c50ea39ae6e51e3f376f507cc3c9e1af11dff8 |
Background: How many MCP packages publish verified provenance →
Dependencies 0 packages
| Packages resolved | 0 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
get_crate ~58
Get full metadata for a specific crate (e.g., 'serde'). Returns description, downloads, latest version, repo, homepage, and categories.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Exact crate name (e.g., "serde", "tokio") |
No output schema declared.
No examples provided.
get_crate_dependencies ~124
List the dependencies of a specific crate version — what <crate> itself depends on. Returns each dependency with its version requirement, kind (normal/build/dev), optional flag, enabled features, and target. Version is optional (defaults to the latest stable). Use for "what does <crate> depend on", dependency audits, or sizing a crate's footprint.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Crate name (e.g. "tokio"). |
| version | string | – | Exact version (e.g. "1.40.0"), or omit for the latest stable. |
No output schema declared.
No examples provided.
get_crate_reverse_deps ~112
List crates that DEPEND ON a given crate (reverse dependencies), most-downloaded first — answers "what uses <crate>", "how widely adopted is <crate>", "who depends on <crate>". Returns the total dependent count plus the top dependents with their version requirement, dependency kind, and download counts.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | number | – | Number of top dependents to return (default 20, max 100). |
| name | string | yes | Crate name (e.g. "serde"). |
No output schema declared.
No examples provided.
get_versions ~41
List all published versions for a crate in reverse chronological order. Returns version number, download count, and publish date.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Crate name |
No output schema declared.
No examples provided.
search_crates ~63
Search crates.io for Rust packages by keyword. Returns crate name, description, downloads, latest version, and repo URL.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | number | – | Number of results to return (default 10, max 100) |
| query | string | yes | Search query string |
No output schema declared.
No examples provided.
How do I install the Crates MCP server?
Crates runs locally as an npm package, launched with npx -y @pipeworx/mcp-crates. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @pipeworx/mcp-crates
claude mcp add pipeworx-io-crates -- npx -y @pipeworx/mcp-crates
What is the Crates MCP server?
Crates is an MCP server listed in the public MCP registry as io.github.pipeworx-io/crates. Crates.io MCP, wraps the crates.io REST API v1 (free, no auth). This page covers its npm package (@pipeworx/mcp-crates).
Is the Crates MCP server safe to use?
Crates scores 85 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. 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 Crates MCP server expose?
Crates exposes 5 tools: search_crates, get_crate, get_versions, get_crate_dependencies, get_crate_reverse_deps. Their descriptions and schemas cost roughly 398 tokens of context every time the server is loaded.
Is the Crates MCP server still maintained?
Crates is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the Crates MCP server under?
Crates declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.