A configuration reference for servers built with @cyanheads/mcp-ts-core, covering framework settings and the server's own environment-based settings. It uses Zod, a library for checking that configuration has the expected shape.

It helps define environment-variable tables, defaults, override priority, server configuration schemas, and delayed configuration parsing for Workers.

It helps keep shared framework settings separate from application-specific settings and documents where each value comes from.

api-config — Skill for Claude Code and Codex by magnusquest

Install

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.

Any agent

npx skills add magnusquest/startgg-mcp --skill api-config

Clone the repo

git clone --depth 1 https://github.com/magnusquest/startgg-mcp

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/magnusquest/startgg-mcp/api-config/github.svg)](https://agentmods.dev/skills/magnusquest/startgg-mcp/api-config)

Your own site

<a href="https://agentmods.dev/skills/magnusquest/startgg-mcp/api-config"><img src="https://agentmods.dev/badge/skills/magnusquest/startgg-mcp/api-config/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/magnusquest/startgg-mcp/api-config"><img src="https://agentmods.dev/badge/skills/magnusquest/startgg-mcp/api-config.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,996 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00043	$0.02996
Opus 5.5	$0.00017	$0.01198
Sonnet 5.5	$0.00009	$0.00599
Haiku 4.5	$0.00004	$0.00300

Measured 2mo ago against content hash 6cc01a758184, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 2mo 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.

skills/api-config/SKILL.md · 212 lines

How it starts

The opening of the file, as written. The whole thing — 212 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 overrides passed to createApp() or createWorkerHandler()
Environment variables
package.json fields

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
`PACKAGE_NAME`	`pkg.name`	`package.json` `name`	Rarely needed
`PACKAGE_VERSION`	`pkg.version`	`package.json` `version`	Rarely needed
`NODE_ENV`	`environment`	`development`	Aliases: `dev`→`development`, `prod`→`production`, `test`→`testing`
`MCP_LOG_LEVEL`	`logLevel`	`debug`	Aliases: `warn`→`warning`, `err`→`error`, `fatal`/`silent`→`emerg`, `trace`→`debug`, `information`→`info`
`LOGS_DIR`	`logsPath`	`<project-root>/logs`	Node.js only; absolute or relative to project root

Transport

Env Var	`AppConfig` field	Default	Notes
`MCP_TRANSPORT_TYPE`	`mcpTransportType`	`stdio`	`stdio` \| `http`
`MCP_HTTP_PORT`	`mcpHttpPort`	`3010`	Port for HTTP transport
`MCP_HTTP_HOST`	`mcpHttpHost`	`127.0.0.1`	Bind address
`MCP_HTTP_ENDPOINT_PATH`	`mcpHttpEndpointPath`	`/mcp`	HTTP endpoint path
`MCP_HTTP_MAX_PORT_RETRIES`	`mcpHttpMaxPortRetries`	`15`	Retry count if port is busy
`MCP_HTTP_PORT_RETRY_DELAY_MS`	`mcpHttpPortRetryDelayMs`	`50`	Delay between port retries (ms)
`MCP_SESSION_MODE`	`mcpSessionMode`	`auto`	`stateless` \| `stateful` \| `auto`
`MCP_STATEFUL_SESSION_STALE_TIMEOUT_MS`	`mcpStatefulSessionStaleTimeoutMs`	`1800000`	30 min; stale session eviction
`MCP_RESPONSE_VERBOSITY`	`mcpResponseVerbosity`	`standard`	`minimal` \| `standard` \| `full`
`MCP_ALLOWED_ORIGINS`	`mcpAllowedOrigins`	—	Comma-separated list; omit to allow all
`MCP_SERVER_RESOURCE_IDENTIFIER`	`mcpServerResourceIdentifier`	—	RFC 8707 resource indicator URL

Read the full file on GitHub · 212 lines

Changes

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.

2mo ago First seen · 212 lines · 43 tokens per session scan A 6cc01a758184

Subscribe to this mod's changes

api-config is a skill published in the GitHub repository magnusquest/startgg-mcp (1 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 43 tokens to every session and 2,996 once invoked, about $0.0002 per session on Opus 5.5. 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.

Backend and APIs Building agents

api-config next to 6 skills from other repositories
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api-configmagnusquest/startgg-mcp	Skill	1	6mo ago	Apache-2.0	A	43	Claude Code, Codex
mem0-oss-to-platformmem0ai/mem0	Skill	69k	5d ago	Apache-2.0	A	217	Claude Code, Codex
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migrate-segw-to-raparc-mcp/arc-1	Skill	260	today	MIT	A	106	Claude Code
telnyx-messaging-hosted-curlteam-telnyx/ai	Skill	226	today	MIT	A	45	Claude Code