What is healthchecks-io-mcp AGENTS.md?

A project instruction file describing a local TypeScript MCP server for Healthchecks.io's management API. It documents the server's purpose, technology, folders, formatting rules, and test commands.

Understand the repository layout, use its Node.js and TypeScript setup, follow formatting conventions, and run the included unit or integration checks.

It gives coding agents and contributors shared context before they change the project. That reduces guesswork about the code structure, runtime requirements, and expected style.

How ronniechong/healthchecks-io-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to ronniechong/healthchecks-io-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/ronniechong/healthchecks-io-mcp/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/ronniechong/healthchecks-io-mcp

Made for: Codex, OpenCode.

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/instructions/ronniechong/healthchecks-io-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/ronniechong/healthchecks-io-mcp/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/ronniechong/healthchecks-io-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/ronniechong/healthchecks-io-mcp/agents-md/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/instructions/ronniechong/healthchecks-io-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/ronniechong/healthchecks-io-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,611 This file is loaded in full into every session.

When invoked 1,611 The same file — it is already loaded in full.

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	$0.01611	$0.01611
Opus 5.5	$0.00644	$0.00644
Sonnet 5.5	$0.00322	$0.00322
Haiku 4.5	$0.00161	$0.00161

Measured 27d ago against content hash 2558b31acc24, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

healthchecks-io-mcp AGENTS.md 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 27d 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.

AGENTS.md · 134 lines

How it starts

The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

What this is

An MCP server exposing Healthchecks.io's Management API as MCP tools, distributed as an installable local package (npx @digitalronin/healthchecks-io-mcp) — a stdio-transport MCP server, not a hosted service. Unofficial, unaffiliated with Healthchecks.io.

Stack

TypeScript, strict mode, ESM (NodeNext module resolution)
@modelcontextprotocol/server / @modelcontextprotocol/client (official MCP SDK) — the only runtime dependency
Native fetch (Node 18+) for HTTP — no HTTP client library
node:test for unit/integration tests — no external test framework
npm as the package manager
Prettier (2-space indent, single quotes, no trailing commas) + EditorConfig for consistent formatting across editors

Structure

src/
  index.ts              entrypoint — reads env, wires everything, runs main()
  smoke.test.ts          subprocess-level test (spawns dist/index.js)
  key-redaction.test.ts  subprocess-level test (spawns dist/index.js)
  config/                constants (base URL, timeouts)
  lib/                   API client, key-tier detection, error translation,
                          response types — shared, no MCP-specific code
  server/                McpServer/client construction (server-factory.ts)
  tools/                 one file per MCP tool (5 v1 read tools, 5 v2
                          mutating tools), plus shared.ts for helpers used
                          by more than one tool (resolveUuid,
                          readOnlyBlockedResult, confirmRequiredResult,
                          checkInputFields), index.ts aggregates
                          registration

Commands

npm install         # install dependencies
npm run build        # compile TypeScript to dist/
npm run typecheck    # type-check without emitting
npm test             # build, then run tests (node:test)
npm run format        # apply Prettier formatting
npm run format:check  # check formatting without writing (CI uses this)
npm audit             # dependency vulnerability check

Read the full file on GitHub · 134 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.

27d ago Changed · +6 lines · +92 tokens per session 2558b31acc24
2mo ago First seen · 128 lines · 1,519 tokens per session scan A 0c5a8d4dd715

Subscribe to this mod's changes

healthchecks-io-mcp AGENTS.md is an instructions file published in the GitHub repository ronniechong/healthchecks-io-mcp (1 stars, last pushed 3d ago), licensed MIT. It adds 1,611 tokens to every session, about $0.0064 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

healthchecks-io-mcp AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
healthchecks-io-mcp AGENTS.mdronniechong/healthchecks-io-mcp	Instructions file	1	3d ago	MIT	A	1,611	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

healthchecks-io-mcp: Instructions file for Codex