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 agentmods add skills/cyanheads/attack-surface-mcp-server/api-confignpx skills add cyanheads/attack-surface-mcp-server --skill api-configgit clone --depth 1 https://github.com/cyanheads/attack-surface-mcp-serverWhat 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 | $0.00043 | $0.05235 |
| Opus 5 | $0.00022 | $0.02618 |
| Sonnet 5 | $0.00009 | $0.01047 |
| Haiku 4.5 | $0.00004 | $0.00524 |
Grade A, and why
api-config 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 2d 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.
This is a copy
100% identical to api-config — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 289 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Overview
Configuration has two layers: core config (managed by the framework, env-driven) and server config (your own Zod schema for domain-specific env vars). Never merge them.
Import: AppConfig, config, parseConfig, resetConfig, ConfigSchema from @cyanheads/mcp-ts-core/config.
Core config
Managed by @cyanheads/mcp-ts-core. Validated via Zod from environment variables. Uses a lazy proxy — parsing is deferred until the first property read.
Priority (highest to lowest):
name/version/title/websiteUrl/description/iconsoptions passed tocreateApp()orcreateWorkerHandler()- Environment variables
package.jsonfields
Identity
| Env Var | AppConfig field |
Default | Notes |
|---|---|---|---|
MCP_SERVER_NAME |
mcpServerName |
package.json name |
Overrides package name |
MCP_SERVER_VERSION |
mcpServerVersion |
package.json version |
Overrides package version |
MCP_SERVER_DESCRIPTION |
mcpServerDescription |
package.json description |
Optional; createApp({ description }) wins when set |
PACKAGE_NAME |
pkg.name |
package.json name |
Rarely needed |
PACKAGE_VERSION |
pkg.version |
package.json version |
Rarely needed |
SDK identity fields (API-only, no env var equivalent — passed to createApp() / createWorkerHandler(), forwarded to initialize and /.well-known/mcp.json):
| Option | Type | Notes |
|---|---|---|
title |
string? |
Human-readable display name shown in client listings |
websiteUrl |
string? |
Canonical homepage / repository URL |
description |
string? |
One-line description; wins over MCP_SERVER_DESCRIPTION when set |
icons |
Implementation['icons']? |
Array of icon objects: { src, mimeType?, sizes?: string[], theme?: 'light'|'dark' } |
cacheHints |
CacheHints? |
Cache hints for the 2026-07-28 cacheable results, keyed by operation — see below |
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.
- 2d ago First seen · 289 lines · 43 tokens per session scan A 9b2ee869e324
api-config is a skill published in the GitHub repository cyanheads/attack-surface-mcp-server (1 stars, last pushed 3d ago), licensed Apache-2.0. It adds 43 tokens to every session and 5,235 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to api-config, differing in 0 lines, and is treated as a copy.
Other skills, from other repositories
analyzing-certificate-transparency-for-phishing
Monitor Certificate Transparency logs using crt.sh and Certstream to detect phishing domains, lookalike certificates, and unauthorized certificate issuance targeting your organization.
analyzing-dns-logs-for-exfiltration
Analyzes DNS query logs to detect data exfiltration via DNS tunneling, DGA domain communication, and covert C2 channels using entropy analysis, query volume anomalies, and subdomain length detection in SIEM platforms. Use when SOC teams need to identify DNS-based threats that bypass traditional network security…
subdomain-enumeration
Map subdomains via crt.sh and subfinder at recon kickoff.
rust-system-calls
Guides using bunsys for system calls and file I/O in Rust. Use when implementing file operations, opening fds, or any syscall path instead of std::fs or libc.
bunqueue-dev
Internal skill for contributing to bunqueue - architecture, testing, code conventions, and development workflow.
google-meet
Google Meet via gws: create spaces, fetch join links, list recordings.