passmcp
OCI · GHCR.IO/SEBASTIENROUSSEAU/PASSMCP-SERVER
Evaluate an MCP server with passmcp and verify its attestations, from inside the agent. Read-only.
Available components
Last scanned (6 hours ago)
Scores higher than 89% of OCI servers
Category Security
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 Security0
- No malware scan is available for this kind of package: the supply-chain vendors we use do not cover it. This is a permanent gap in our coverage, not a finding about the package.Unverified
- Known CVEs could not be checked: this image's dependency list comes from an SBOM its publisher attached, which nothing verifies, so we will not report it as a clean result.Unverified
- Install-script risk not yet assessed.Unverified
- Dependency health could not be checked: this image's dependency list comes from an SBOM its publisher attached. It names packages and versions but not whether each is deprecated, still maintained or linked to its source, so there is nothing we can fairly grade.Unverified
Provenance & Transparency48
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (GPL-3.0-only).Pass
- Actively maintained (last published 17 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability80
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 381 tokens (~127/item across 3 items; 3 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management80
- Stability observed for 24 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
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
Unverified: 1 category
A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. 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.
- 5 Nov 26 −3
- Stability: pass → 0.80 functional
- 30 Oct 26 0
- Stability: 0.97 → pass security
- 29 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 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 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.
- 25 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.
- 23 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.
- 21 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.
- 19 Oct 26 +1
- Package version: 0.0.3 → 0.0.8 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 5 Nov 2026 · Analysed oci/ghcr.io/sebastienrousseau/passmcp-server@0.0.8
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | oci |
| Reason | No attestation published |
Background: How many MCP packages publish verified provenance →
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 →
passmcp_check Evaluate an MCP server with passmcp ~159
Evaluate an MCP server's Streamable HTTP endpoint with passmcp's diagnostic and return its score, grade, counts and every failing check with what it means and a link to the fix. Use it to find out whether a server is ready for agents before relying on it. The endpoint must be on this server's allowlist (loopback addresses by default). No credentials leave this machine, and passmcp calls only the server's tools that declare readOnlyHint. An evaluation takes up to a minute.
| Name | Type | Req | Description |
|---|---|---|---|
| endpoint | string | yes | The server's Streamable HTTP URL, such as http://127.0.0.1:3000/mcp. |
| phases | array | – | Evaluate only these phases; omit for all nine. |
| Name | Type | Req | Description |
|---|---|---|---|
| blocked | string | – | – |
| counts | object | yes | – |
| endpoint | string | yes | – |
| failures | array | yes | – |
| grade | string | yes | – |
| score | number | yes | – |
| truncated | boolean | – | – |
No examples provided.
passmcp_verify_attestation Verify a passmcp attestation ~112
Check a passmcp attestation, the in-toto statement passmcp produces about one MCP server, offline: its structure, its subject digest, and optionally that it is about a given endpoint. Returns whether it is valid, what it says, and why not when it is not. Nothing is fetched; pass the statement's JSON text.
| Name | Type | Req | Description |
|---|---|---|---|
| endpoint | string | – | When given, the endpoint the statement must be about. |
| statement | string | yes | The attestation's JSON text. |
| Name | Type | Req | Description |
|---|---|---|---|
| covers | boolean | – | – |
| endpoint | string | – | – |
| error | string | – | – |
| failing | array | – | – |
| grade | string | – | – |
| score | number | – | – |
| valid | boolean | yes | – |
No examples provided.
passmcp_version Report the versions in use ~40
Return passmcp-server's version and the version of the passmcp program it uses, for a bug report or to confirm a check exists.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| passmcp | string | yes | – |
| passmcpServer | string | yes | – |
No examples provided.
How do I install the passmcp MCP server?
passmcp runs locally as a container image, launched with docker run --rm -i -e PASSMCP_SERVER_ALLOW ghcr.io/sebastienrousseau/passmcp-server:0.0.8. Ready-made configuration for Claude, Cursor, VS Code, Codex and 3 more is on this page, copied from each client's own documentation.
oci · ghcr.io/sebastienrousseau/passmcp-server
claude mcp add com-sebastienrousseau-passmcp-server -- docker run --rm -i -e PASSMCP_SERVER_ALLOW ghcr.io/sebastienrousseau/passmcp-server:0.0.8
This image reads PASSMCP_SERVER_ALLOW. Set it in your client's env block for this server; docker run -e passes it through to the container.
What is the passmcp MCP server?
passmcp is an MCP server listed in the public MCP registry as com.sebastienrousseau/passmcp-server. Evaluate an MCP server with passmcp and verify its attestations, from inside the agent. Read-only. This page covers its container image (ghcr.io/sebastienrousseau/passmcp-server).
Is the passmcp MCP server safe to use?
passmcp scores 53 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 passmcp MCP server expose?
passmcp exposes 3 tools: passmcp_check, passmcp_verify_attestation, passmcp_version. Their descriptions and schemas cost roughly 311 tokens of context every time the server is loaded.
Is the passmcp MCP server still maintained?
passmcp 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 passmcp MCP server under?
passmcp declares the GPL-3.0-only licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.