Shieldly IO MCP vs Cyntrisec Cli
A side-by-side look at the Shieldly IO MCP and Cyntrisec Cli MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Shieldly IO MCP for security work as a local process; choose Cyntrisec Cli for security as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Shieldly IO MCP when
- You need dedicated capabilities in the Security domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
- You have the keys it needs:
SHIELDLY_API_KEY. - You want tools like
analyze_iam_policy, analyze_cloudformation_template.
Choose Cyntrisec Cli when
- You need dedicated capabilities in the Security domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Security | Security |
| Quality signal | 57/100 · Good | 40/100 · Fair |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | No auth required | API key required |
| Pricing | Freemium | Free |
| Required env vars | SHIELDLY_API_KEY | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 4 |
| Directory activity | 2 views 0 installs 0 upvotes | 2 views 0 installs 0 upvotes |
| Tools | 2 | Not listed |
| Full listing | View Shieldly IO MCP | View Cyntrisec Cli |
Tools & capabilities
Shieldly IO MCP tools 2
analyze_iam_policyAI-Powered security analysis of an AWS IAM policy (identity policy or cross-account trust+identity pair). Flags privilege-escalation paths, wildcards, and other over-permissive access. Runs in demo mode (rate-limited, no signup) if SHIELDLY_API_KEY is not set.analyze_cloudformation_templateAI-Powered security analysis of a CloudFormation template — extracts IAM roles/policies and flags over-permissive access. Runs in demo mode (rate-limited, no signup) if SHIELDLY_API_KEY is not set.
Cyntrisec Cli tools
No tool names declared yet. Check the project README from the listing page.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Shieldly IO MCP
{
"mcpServers": {
"shieldly-io-mcp": {
"command": "npx",
"args": [
"-y",
"@shieldly/mcp"
],
"env": {
"SHIELDLY_API_KEY": "YOUR_SHIELDLY_API_KEY_HERE"
}
}
}
}
Cyntrisec Cli
{
"mcpServers": {
"cyntrisec-cyntrisec-cli": {
"command": "uvx",
"args": [
"cyntrisec"
]
}
}
}
Frequently asked questions
Shieldly IO MCP is categorized under Security and uses a local stdio subprocess. Cyntrisec Cli belongs to Security and uses a local stdio subprocess. Pick Shieldly IO MCP for security work and Cyntrisec Cli for security.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Shieldly IO MCP is listed as freemium — a free tier with paid plans. Auth: no auth required. Cyntrisec Cli is listed as free. Auth: api key required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add shieldly-io-mcp and cyntrisec-cyntrisec-cli as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Shieldly IO MCP has a quality signal of 57/100 (Good) with 2 views, 0 installs and 0 GitHub stars. Cyntrisec Cli has 40/100 (Fair) with 2 views, 0 installs and 4 GitHub stars.