Cerver
NPM · @CERVER/MCP
AI backend for your app: a chat per customer, replies with their cost, spend caps per project.
Available components
Last scanned (7 hours ago)
Scores higher than 31% of npm servers
Category AI and Machine Learning
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 & Transparency19
- Repository check failed: no source repository is declared. See how to fix → View diagnostics → Fail
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 0 days ago).Pass
- Security-disclosure policy not yet verified: we couldn't inspect the source repository.Unverified
Schema Quality & AI Usability76
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 187 tokens (~62/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 Management0
- Stability observed for 0 of 30 days with no destabilising changes; credit accrues until the full window elapses.Unverified
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 Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "send_message" implies "send" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- An AI judge read all 3 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities20
- Spec-recency check failed: implements MCP spec 2024-11-05; the latest is 2026-07-28. See how to fix → Fail
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.
- 4 Nov 26 61
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/@cerver/mcp@0.1.1
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
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 →
open_chat ~91
Open a Cerver chat session for one of your end-customers. Returns a session_id to pass to send_message. Cerver stores the conversation and attributes cost to this customer.
| Name | Type | Req | Description |
|---|---|---|---|
| customer_id | string | yes | Your id for the end-customer this chat is for (e.g. 'cust_amy' or a UUID). Don't pass an email or a name. Cost is rolled up per customer_id. |
No output schema declared.
No examples provided.
send_message ~72
Send a message in a Cerver chat session and get the assistant's reply plus what the message cost.
| Name | Type | Req | Description |
|---|---|---|---|
| message | string | yes | The user's message. |
| model | string | – | Optional model id. Defaults to a fast, cheap model. |
| session_id | string | yes | The session_id returned by open_chat. |
No output schema declared.
No examples provided.
whoami ~24
Show which Cerver project this key is bound to (project slug + scope).
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
How do I install the Cerver MCP server?
Cerver runs locally as an npm package, launched with npx -y @cerver/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 · @cerver/mcp
claude mcp add eyal-gor-cerver -- npx -y @cerver/mcp
What is the Cerver MCP server?
Cerver is an MCP server listed in the public MCP registry as io.github.eyal-gor/cerver. AI backend for your app: a chat per customer, replies with their cost, spend caps per project. This page covers its npm package (@cerver/mcp).
Is the Cerver MCP server safe to use?
Cerver scores 61 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. 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 Cerver MCP server expose?
Cerver exposes 3 tools: open_chat, send_message, whoami. Their descriptions and schemas cost roughly 187 tokens of context every time the server is loaded.
Is the Cerver MCP server still maintained?
Cerver 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 Cerver MCP server under?
Cerver declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.