What is outlook-mcp AGENTS.md?

A set of instructions for AI assistants working on the outlook-mcp codebase. It describes the project, its Outlook connection, its authentication code, and its folder structure.

Use it when reviewing, modifying, building, or navigating the outlook-mcp repository.

It gives the assistant the context needed to understand how the repository works before making changes. This reduces the chance of edits that conflict with the project's design.

How hickeroar/outlook-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to hickeroar/outlook-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/hickeroar/outlook-mcp/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/hickeroar/outlook-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/hickeroar/outlook-mcp/agents-md.svg)](https://agentmods.dev/instructions/hickeroar/outlook-mcp/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/hickeroar/outlook-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/hickeroar/outlook-mcp/agents-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 1,237 This file is loaded in full into every session.

When invoked 1,237 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	$0.01237	$0.01237
Opus 5	$0.00619	$0.00619
Sonnet 5	$0.00247	$0.00247
Haiku 4.5	$0.00124	$0.00124

Measured 7d ago against content hash 35f7ad0f273f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

outlook-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 7d 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 · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Guidelines for Outlook MCP

AI guidance for working with this codebase.

Repository

Repository: https://github.com/hickeroar/outlook-mcp
Install: npm install && npm run build, then point MCP client to dist/index.js

Project Overview

MCP server for Microsoft Outlook mail and calendar. Uses OWA REST v2 APIs with authentication tokens extracted from a browser session. The browser is only used for initial login and token refresh.

Architecture

src/
├── index.ts              # MCP server entry (stdio)
├── cli.ts                # CLI with full tool parity
├── server.ts             # OutlookServer class
├── constants.ts          # URLs, timeouts, page sizes
├── auth/
│   ├── crypto.ts         # AES-256-GCM encryption at rest
│   ├── session-store.ts  # Encrypted session/token files
│   ├── token-extractor.ts
│   ├── token-refresh.ts  # HTTP-first, browser fallback
│   ├── token-refresh-http.ts
│   └── msal-decrypt.ts   # MSAL v4 localStorage decryption
├── browser/
│   ├── context.ts        # Persistent Chrome/Edge profile
│   └── auth.ts           # Login detection and flows
├── api/
│   ├── outlook-rest.ts   # owaGet/Post/Patch/Delete
│   ├── mail.ts           # Mail CRUD
│   ├── calendar.ts       # Calendar CRUD + RSVP
│   └── owa-service.ts    # service.svc fallbacks
├── tools/
│   ├── registry.ts       # Tool registration
│   ├── auth-tools.ts
│   ├── folder-tools.ts
│   ├── mail-tools.ts
│   └── calendar-tools.ts
├── utils/
│   ├── http.ts           # Retry, timeout, rate limiting
│   ├── api-config.ts     # OWA_API endpoints + headers
│   ├── auth-guards.ts    # requireOwaTokenAsync
│   ├── parsers-mail.ts
│   └── parsers-calendar.ts
└── types/
    ├── outlook.ts        # Domain DTOs
    ├── errors.ts         # ErrorCode taxonomy
    ├── result.ts         # Result<T, E>
    └── server.ts         # OutlookServer interface

Implementation Patterns

Result types: API functions return Result<T>; tool handlers convert via handleApiResult.
Auth guards: requireOwaTokenAsync() proactively refreshes tokens near expiry.
Auto-login: OutlookServer retries failed tools after headless re-auth on AUTH_* errors.
Encryption: Session and token files encrypted with machine-specific AES-256-GCM key.
HTTP-first refresh: MSAL refresh token via Azure AD; browser SSO as fallback.

Read the full file on GitHub · 127 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.

7d ago First seen · 127 lines · 1,237 tokens per session scan A 35f7ad0f273f

Subscribe to this mod's changes

outlook-mcp AGENTS.md is an instructions file published in the GitHub repository hickeroar/outlook-mcp (0 stars, last pushed 28d ago), licensed MIT. It adds 1,237 tokens to every session, about $0.0062 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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Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

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