Overview

This MCP (Model Context Protocol) server extension embeds Snyk vulnerability scanning into agentic workflows so LLM-driven agents can discover, prioritize, and remediate security issues automatically. The server exposes Snyk capabilities (test, monitor, issue listing, and suggested fixes) as callable tools over the MCP interface, letting models inspect repository code, run scans, and return actionable results without direct human intervention.

Embedding Snyk into an MCP server is useful for automating security tasks in developer workflows (PR triage, CI gating, remediation suggestions) and for building security-aware AI assistants. Agents can request a scan, interpret findings in context, and trigger follow-up actions (create issue, propose patch, or block merge) while the server handles auth, scanning, and result normalization.

Features

Exposes Snyk CLI functionality as MCP tools (test, monitor, list issues, create patches)
Token-based authentication support (SNYK_TOKEN) and safe environment handling
JSON-structured results for easy parsing by model agents
Optional dry-run mode for safe experimentation
Configurable scanning scope (path, org, project)
Integrates into agent workflows for automated triage, reporting, and remediation

Installation / Configuration

Prerequisites:

Node.js 16+ (or Docker)
A Snyk API token (SNYK_TOKEN). Create one at https://snyk.io/account

Install Snyk CLI (recommended):

# npm (global)
npm install -g snyk

# or use npx to invoke without global install
npx snyk --help

Clone and run the MCP server (example Node-based setup):

git clone https://github.com/snyk/snyk-ls.git
cd snyk-ls/mcp_extension

# install dependencies
npm install

# run with environment token
export SNYK_TOKEN="your_snyk_token_here"
node mcp-server.js --port 8080 --config ./mcp-config.json

Docker (alternative):

docker build -t snyk-mcp .
docker run -p 8080:8080 -e SNYK_TOKEN="${SNYK_TOKEN}" snyk-mcp

Example mcp-config.json:

{
  "server": { "port": 8080, "bind": "0.0.0.0" },
  "tools": [
    { "name": "snyk.test", "command": "snyk test --json", "cwd": "./workspace" },
    { "name": "snyk.monitor", "command": "snyk monitor --json", "cwd": "./workspace" },
    { "name": "snyk.patch", "command": "snyk wizard --json", "cwd": "./workspace" }
  ]
}

Environment variables:

SNYK_TOKEN — required API token for Snyk operations
MCP_PORT — optional port override
MCP_BIND — optional bind address

API example: request a scan

curl -X POST http://localhost:8080/call-tool \
  -H "Content-Type: application/json" \
  -d '{"tool":"snyk.test","args":{"path":"./repo"}}'

Response (abridged JSON):

{
  "tool": "snyk.test",
  "status": "success",
  "output": { "vulnerabilities": [...], "summary": {...} }
}

Available Tools

The extension exposes a set of tools agents can call. Typical tool names and behaviors:

Tool name	Purpose	Input	Output
snyk.test	Run a Snyk vulnerability test on a path	path, package manager, severity filters	JSON list of vulnerabilities and metadata
snyk.monitor	Upload snapshot for continuous monitoring	path, project name, org	Monitor ID, summary, remediation hints
snyk.oss.fix	Suggest or apply open-source dependency fixes	path, dryRun flag	Suggested upgrades or PR/patch metadata
snyk.licensing	Report license issues	path	License risk list
snyk.issues	List/open issues for a project	projectId, filters	Issues with remediation steps

Note: Tool names, flags, and behavior are configurable in mcp-config.json; the server adapts commands to the configured CLI arguments and returns structured JSON.

Use Cases

Pull request security checks: Configure your CI or agent to call snyk.test on a branch. The agent can summarize results in a PR comment, block merges on critical findings, or open issues automatically.
Conversational security assistant: An LLM agent queries snyk.test, interprets results, and recommends which vulnerabilities to prioritize (e.g., exploitable, high severity, reachable from public endpoints).
Automated remediation suggestions: Agents call snyk.oss.fix in dry-run to generate upgrade recommendations and then create a PR using repository APIs with the suggested changes.
Continuous compliance monitoring: Periodically call snyk.monitor to register project snapshots. Agents can report drift from policy and create tickets when new issues exceed thresholds.
Emergency triage: On a high-severity alert, the agent can call snyk.test, gather affected files, correlate with recent commits, and produce a succinct incident report for on-call teams.

Best Practices

Run scans on CI and in pre-merge hooks for early detection.
Use least-privileged SNYK_TOKEN scopes for automation accounts.
Leverage dry-run mode before applying automated fixes.
Normalize Snyk outputs (JSON) in the agent to maintain deterministic prompts and reasoning.

This MCP server provides a lightweight bridge between Snyk’s scanning capabilities and model-driven automation, enabling secure, auditable, and actionable agent behaviors in developer workflows.

Snyk Vulnerability Scanning for MCP Server Workflows