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 biggora/claude-plugins-registry --skill n8n-apigit clone --depth 1 https://github.com/biggora/claude-plugins-registryWrote 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/biggora/claude-plugins-registry/n8n-api)<a href="https://agentmods.dev/skills/biggora/claude-plugins-registry/n8n-api"><img src="https://agentmods.dev/badge/skills/biggora/claude-plugins-registry/n8n-api.svg" alt="Measured on agentmods" 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 | $0.00082 | $0.01641 |
| Opus 5 | $0.00041 | $0.00821 |
| Sonnet 5 | $0.00016 | $0.00328 |
| Haiku 4.5 | $0.00008 | $0.00164 |
Grade A, and why
n8n-api scanned grade A with 1 finding 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 6d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl --silent --show-error --fail-with-body \ How it starts
The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.
n8n Public REST API
Use the public /api/v1 API in a version-aware, least-privilege way. This skill was validated against stable n8n 2.36.8 on 2026-08-29, but the target instance's discovery response and OpenAPI document are authoritative.
Required inputs
Establish these before calling the API:
- the instance base URL, including any configured path prefix and excluding a trailing slash
- an API key available through an environment variable or secret manager
- the intended operation and exact target resource
- explicit authorization for any mutation, especially publish, retry, stop, delete, package, settings, or source-control operations
Do not ask the user to paste an API key into chat. Do not print, log, commit, or persist the key. If no key is available, explain how to create one in Settings > n8n API and let the user place it in the environment.
Use N8N_BASE_URL and N8N_API_KEY in examples. If the user's environment already uses N8N_HOST, preserve it rather than renaming configuration unnecessarily.
Workflow
1. Classify the request
- Read-only inspection can proceed once the target instance is known and credentials are available.
- A write requires the user's requested outcome to clearly authorize that write.
- Bulk changes, execution retries, workflow publication, source-control pulls, and destructive operations require a preview of the exact scope before execution.
- If the user asks only for code or instructions, do not call their instance.
2. Discover what this instance and key support
Prefer capability discovery over a memorized endpoint list:
curl --silent --show-error --fail-with-body \
-H "Accept: application/json" \
-H "X-N8N-API-KEY: $N8N_API_KEY" \
"$N8N_BASE_URL/api/v1/discover?resource=workflow&include=schemas"
GET /discover returns the scopes, resources, operations, endpoint paths, and a specUrl visible to the current API key. Use resource and operation filters to keep the response focused. Add include=schemas when constructing a request body.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 6d ago First seen · 118 lines · 82 tokens per session scan A 708e2e60cbf4
n8n-api is a skill published in the GitHub repository biggora/claude-plugins-registry (2 stars, last pushed 8d ago), licensed MIT. It adds 82 tokens to every session and 1,641 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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