mcpspan
NPM · MCPSPAN-MCP · 2 COMPONENTS
Ask your agent about your MCP servers: failing tools, releases, clients, sessions.
Available components
Last scanned (23 hours ago)
Scores higher than 81% of npm servers
Category Developer Tools
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
- 0 of 3 dependencies flagged as unhealthy. View diagnostics → Pass
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to mcpspan/mcpspan). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 7 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability65
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1886 tokens (~171/item across 11 items; 11 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management37
- Stability observed for 11 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 11 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 12 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
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.
- 3 Nov 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.
- 1 Nov 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.
- 30 Oct 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.
- 28 Oct 26 +15
- Malware scan: unverified → pass ▲ security
- 27 Oct 26 +1
- Malware scan: unverified → pass ▲ security
- Package version: 0.12.0 → 0.13.0 functional
- 26 Oct 26 −14
- Malware scan: pass → unverified ▼ security
- Stability: unverified → 0.07 ▲ functional
- Package version: 0.11.0 → 0.12.0 functional
- 25 Oct 26 +26
- Malware scan: unverified → pass ▲ security
- Known CVEs: unverified → pass ▲ security
- Dependency health: unverified → 1.00 ▲ functional
- 24 Oct 26 53
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 4 Nov 2026 · Analysed npm/mcpspan-mcp@0.13.0
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 | mcpspan/mcpspan |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/mcpspan/mcpspan/.github/workflows/release.yml@refs/tags/core/v0.13.0 |
| Rekor log index | 3519064420 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:885cbb6df0e93c853579dd9dedf8fc34659616370df764bc8bf25117a7ff34c94b93889eb3f74a683885dc9ca0a64957e447654147f4c96ad44ddfb77 |
Background: How many MCP packages publish verified provenance →
Dependencies 3 packages
| Packages resolved | 3 |
|---|---|
| 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 →
compare_versions Compare versions ~178
The server's versions in the window, newest first, each with when it was first seen, its calls, error rate and response times: how a release compares with the one before.
| Name | Type | Req | Description |
|---|---|---|---|
| client | string | – | Only calls from this client type, as list_clients names them, such as claude-code or cursor. |
| days | integer | – | How many days back to look, ending now. 7 when left out. Ignored when from is given. |
| from | string | – | Start of the window, as an ISO 8601 date or time. Overrides days. |
| server | string | – | The MCP server to ask about, by name or id. Leave out when the account has only one. |
| to | string | – | End of the window, as an ISO 8601 date or time. Now when left out. |
No output schema declared.
No examples provided.
get_overview Overview ~173
Calls, failures, error rate, response times (median and 95th percentile) and the share of each client, for one server over a window.
| Name | Type | Req | Description |
|---|---|---|---|
| client | string | – | Only calls from this client type, as list_clients names them, such as claude-code or cursor. |
| days | integer | – | How many days back to look, ending now. 7 when left out. Ignored when from is given. |
| from | string | – | Start of the window, as an ISO 8601 date or time. Overrides days. |
| server | string | – | The MCP server to ask about, by name or id. Leave out when the account has only one. |
| to | string | – | End of the window, as an ISO 8601 date or time. Now when left out. |
No output schema declared.
No examples provided.
get_session Session ~153
One session's calls in the order the agent made them, with each call's outcome and error.
| Name | Type | Req | Description |
|---|---|---|---|
| days | integer | – | How many days back to look, ending now. 7 when left out. Ignored when from is given. |
| from | string | – | Start of the window, as an ISO 8601 date or time. Overrides days. |
| server | string | – | The MCP server to ask about, by name or id. Leave out when the account has only one. |
| session | string | yes | The session id, as list_sessions or list_errors gives it. |
| to | string | – | End of the window, as an ISO 8601 date or time. Now when left out. |
No output schema declared.
No examples provided.
get_tool Tool details ~188
Everything recorded about one tool: why its calls failed and the commonest error messages, which arguments the server refused, its parameters, how large its answers are, when its definition changed, how often agents repeated a call, and which call came right before the ones that repeated or failed.
| Name | Type | Req | Description |
|---|---|---|---|
| days | integer | – | How many days back to look, ending now. 7 when left out. Ignored when from is given. |
| from | string | – | Start of the window, as an ISO 8601 date or time. Overrides days. |
| server | string | – | The MCP server to ask about, by name or id. Leave out when the account has only one. |
| to | string | – | End of the window, as an ISO 8601 date or time. Now when left out. |
| tool | string | yes | The tool's name, as list_tools gives it. |
No output schema declared.
No examples provided.
get_tool_listing What agents are shown ~188
Every tool as agents were shown it when they listed the tools: in how many sessions, how many of those called it, and how large its definition is. Finds tools agents see but never use, and definitions that cost context.
| Name | Type | Req | Description |
|---|---|---|---|
| client | string | – | Only calls from this client type, as list_clients names them, such as claude-code or cursor. |
| days | integer | – | How many days back to look, ending now. 7 when left out. Ignored when from is given. |
| from | string | – | Start of the window, as an ISO 8601 date or time. Overrides days. |
| server | string | – | The MCP server to ask about, by name or id. Leave out when the account has only one. |
| to | string | – | End of the window, as an ISO 8601 date or time. Now when left out. |
No output schema declared.
No examples provided.
list_clients List clients ~147
The clients that called the server (Claude, Claude Code, Cursor, VS Code, ChatGPT and others), each with its calls, error rate and response times.
| Name | Type | Req | Description |
|---|---|---|---|
| days | integer | – | How many days back to look, ending now. 7 when left out. Ignored when from is given. |
| from | string | – | Start of the window, as an ISO 8601 date or time. Overrides days. |
| server | string | – | The MCP server to ask about, by name or id. Leave out when the account has only one. |
| to | string | – | End of the window, as an ISO 8601 date or time. Now when left out. |
No output schema declared.
No examples provided.
list_errors List failed calls ~222
The most recent failed calls, newest first: which tool, which client, when, what kind of failure (a handler that threw, a tool that answered with an error, refused arguments, an unknown tool) and the error message when the server records them.
| Name | Type | Req | Description |
|---|---|---|---|
| client | string | – | Only calls from this client type, as list_clients names them, such as claude-code or cursor. |
| days | integer | – | How many days back to look, ending now. 7 when left out. Ignored when from is given. |
| from | string | – | Start of the window, as an ISO 8601 date or time. Overrides days. |
| limit | integer | – | How many to return. 20 when left out. |
| server | string | – | The MCP server to ask about, by name or id. Leave out when the account has only one. |
| to | string | – | End of the window, as an ISO 8601 date or time. Now when left out. |
| tool | string | – | Only failures of this tool. |
No output schema declared.
No examples provided.
list_servers List servers ~25
The MCP servers this mcpspan account reports on, with their names and ids.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
list_sessions List sessions ~215
Recent sessions (one connection each), newest first, with their calls, failures, tools used and calls an agent repeated with the same arguments.
| Name | Type | Req | Description |
|---|---|---|---|
| client | string | – | Only calls from this client type, as list_clients names them, such as claude-code or cursor. |
| days | integer | – | How many days back to look, ending now. 7 when left out. Ignored when from is given. |
| from | string | – | Start of the window, as an ISO 8601 date or time. Overrides days. |
| limit | integer | – | How many to return. 20 when left out. |
| server | string | – | The MCP server to ask about, by name or id. Leave out when the account has only one. |
| to | string | – | End of the window, as an ISO 8601 date or time. Now when left out. |
| tool | string | – | Only sessions that called this tool. |
| with | string | – | Only sessions with failures, or with repeated calls. |
No output schema declared.
No examples provided.
list_tools List tools ~202
A server's tools ranked by calls, errors, response time or name, each with its calls, errors, error rate and response times.
| Name | Type | Req | Description |
|---|---|---|---|
| client | string | – | Only calls from this client type, as list_clients names them, such as claude-code or cursor. |
| days | integer | – | How many days back to look, ending now. 7 when left out. Ignored when from is given. |
| from | string | – | Start of the window, as an ISO 8601 date or time. Overrides days. |
| limit | integer | – | How many to return. 20 when left out. |
| server | string | – | The MCP server to ask about, by name or id. Leave out when the account has only one. |
| sort | string | – | How to rank them. calls when left out. |
| to | string | – | End of the window, as an ISO 8601 date or time. Now when left out. |
No output schema declared.
No examples provided.
list_unknown_tools List unknown tools ~148
Tools that agents asked for but the server does not have: how often, which clients, the closest tool the server does have, and what the agent did next.
| Name | Type | Req | Description |
|---|---|---|---|
| days | integer | – | How many days back to look, ending now. 7 when left out. Ignored when from is given. |
| from | string | – | Start of the window, as an ISO 8601 date or time. Overrides days. |
| server | string | – | The MCP server to ask about, by name or id. Leave out when the account has only one. |
| to | string | – | End of the window, as an ISO 8601 date or time. Now when left out. |
No output schema declared.
No examples provided.
How do I install the mcpspan MCP server?
mcpspan runs locally as an npm package, launched with npx -y mcpspan-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · mcpspan-mcp
claude mcp add mcpspan-mcpspan -- npx -y mcpspan-mcp
What is the mcpspan MCP server?
mcpspan is an MCP server listed in the public MCP registry as io.github.mcpspan/mcpspan. Ask your agent about your MCP servers: failing tools, releases, clients, sessions. This page covers its npm package (mcpspan-mcp).
Is the mcpspan MCP server safe to use?
mcpspan scores 84 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 4 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 mcpspan MCP server expose?
mcpspan exposes 11 tools: list_servers, get_overview, list_tools, get_tool, list_errors, and 6 more. Their descriptions and schemas cost roughly 1,839 tokens of context every time the server is loaded.
Is the mcpspan MCP server still maintained?
mcpspan is still listed as active in the MCP registry. We last reached this channel on 4 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 mcpspan MCP server under?
mcpspan declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.