Skills/npm/developer-mcp

developer-mcp@2.2.6

VERIFIED· startup only

Publisher claims: "MCP server and library for Xano development - XanoScript validation, Meta API, Run API, and CLI documentation" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher xano · publishing for 282 daysInstalls 5,721Last detonated 3d ago
$claude mcp add developer-mcp -- npx -y @xano/developer-mcp
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Coverage

Startup only; authenticated tool behavior not tested.
Tested
server startup over stdio (initialize sent) · every file read, file written and host contacted by what ran
Not tested
the tool list (the server exited before answering) · what the tools do when called with real credentials

What this means for the label: Verified here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

It will ask for
no credential variables read in the code
Where it talks to
xano.com, xano.io (its own)
What the honeypot saw
no credential files read · no network
What we could not test
the tool list (the server exited before answering) · what the tools do when called with real credentials

Connect it under the guard. Startup only; authenticated tool behavior not tested. The code names no credential variable and talks to xano.com, xano.io, its own; the guard pins the network to what the honeypot saw and logs every call.

$vet-skills run --net declared -- npx -y @xano/developer-mcp

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; startup only; authenticated tool behavior not tested) on 2026-11-11 and scored it 89/100 (Verified). In what ran, nothing we could detect went wrong: no undeclared network egress, no credential reads, no persistent instruction writes. What it does with a real credential was not observed; the static findings and the publisher carry the rest of the score. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 29 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
8.7sprocessdependency install exit 0
29sclaimedstartup only: exited (0) before answering · code: 'ERR_MODULE_NOT_FOUND', url: 'file:///tmp/ks-detonate-aFERw8/task/home/work/acme-api/.claude/skills/developer-mcp/dist/xanoscript_docs/docs_index.json' } Node.js v22.23.4
29sprocessscript backend runs setup only
29sprocessno install scripts to re-run

Static findings

HIGH
Destructive file system command detecteddist/tools/validate_xanoscript.js:68 · Destructive file system command detected… suggestion: 'XanoScript has no fluent ".query()...delete()" chain. Use "db.del \\"table\\" { field_name = ... field_value = ... }" for one record, or "db.bulk.d…Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
HIGH
Destructive file system command detecteddist/tools/validate_xanoscript.js:76 · Destructive file system command detectedsuggestion: 'XanoScript deletes use block statements, not a ".delete()" method. Use "db.del \\"table\\" { ... }" (one record) or "db.bulk.delete \\"table\\" { where = ... }" (many)',Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
LOW
Authorization escalation languagedist/xanoscript_docs/security.md:100 · Authorization escalation language · informational: not an instruction fileerror = "Admin access required"Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
File type combined with upload actiondist/xanoscript.js:29 · File type combined with upload action — agent may exfiltrate local data files* docs_index.json. Lets callers pass a natural synonym (e.g. "upload",Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
LOW
Instructs the agent to modify its persistent memory or instruction filesdist/cli_docs/topics/knowledge.js:117 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction file"Edit `knowledge/agents.md`, `knowledge/docs/*.md`, or `knowledge/skills/*/SKILL.md` (keep the `inclusion` frontmatter field: always, on demand, or manual)",Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01

Cost to the agent

Instructions loaded
≈2,122 tok
2 files · 81 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0

Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.

Known vulnerabilities

No advisories in OSV for @xano/developer-mcp@2.2.6 as of 3d ago. This is the package itself, not its dependencies.

developer-mcp@2.2.6 safety verdict: Verified (startup only) — KillerSkills