Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add anatolykoptev/n8n-mcp-agent --skill n8n-securitygit clone --depth 1 https://github.com/anatolykoptev/n8n-mcp-agentWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/anatolykoptev/n8n-mcp-agent/n8n-security)<a href="https://agentmods.dev/skills/anatolykoptev/n8n-mcp-agent/n8n-security"><img src="https://agentmods.dev/badge/skills/anatolykoptev/n8n-mcp-agent/n8n-security/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/anatolykoptev/n8n-mcp-agent/n8n-security"><img src="https://agentmods.dev/badge/skills/anatolykoptev/n8n-mcp-agent/n8n-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00032 | $0.01656 |
| Opus 5 | $0.00016 | $0.00828 |
| Sonnet 5 | $0.00006 | $0.00331 |
| Haiku 4.5 | $0.00003 | $0.00166 |
Grade A, and why
n8n-security scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 291 lines — stays where its author put it; the contents beside it link to each section on GitHub.
n8n Security Skill
This skill ensures n8n workflows follow security best practices.
When to Activate
- Creating webhook endpoints
- Setting up credentials
- Processing external/user input
- Preparing workflows for production
- Handling sensitive data (payments, PII)
- Integrating with external APIs
Security Checklist
1. Webhook Authentication
Always Authenticate Production Webhooks
| Auth Method | Security Level | Use Case |
|---|---|---|
| None | Low | Testing only |
| Basic Auth | Medium | Simple auth with HTTPS |
| Header Auth | Medium-High | API key validation |
| JWT Auth | High | Token-based with expiration |
Implementation
# Basic Auth
Authorization: Basic base64(username:password)
# Header Auth
X-API-Key: your-api-key-here
# JWT Auth
Authorization: Bearer eyJhbGciOiJIUzI1NiIs...
Verification Steps
- Production webhooks use authentication (not "None")
- HTTPS enabled for all webhook endpoints
- API keys rotated regularly
- JWT tokens have reasonable expiration
2. Credentials Management
Never Hardcode Secrets
// WRONG: Hardcoded in Code node
const apiKey = "sk-proj-xxxxx"
// CORRECT: Use credentials or external secrets
const apiKey = $credentials.openAiApi.apiKey
External Secrets Support
n8n supports external secret vaults:
// Reference secrets from vault
{{ $secrets.vault.mySecretName }}
{{ $secrets.infisical.mySecretName }}
{{ $secrets.awsSecretsManager.mySecretName }}
Secure Credential Storage
Use _FILE suffix for Docker/Kubernetes secrets:
DB_POSTGRESDB_PASSWORD_FILE=/path/to/secret
CREDENTIALS_OVERWRITE_DATA_FILE=/path/to/credentials
Verification Steps
- No hardcoded API keys, tokens, passwords
- Credentials stored in n8n credential system
- External secrets used for sensitive data
-
_FILEsuffix used for Docker/K8s secrets
3. Input Validation
Validate Webhook Input
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 291 lines · 32 tokens per session scan A 41b650c5161d
n8n-security is a skill published in the GitHub repository anatolykoptev/n8n-mcp-agent (0 stars, last pushed 6mo ago), licensed MIT. It adds 32 tokens to every session and 1,656 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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