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io.github.chrischall/office-outlook-mcp

io.github.chrischall/office-outlook-mcpv0.1.1Email

Outlook / Microsoft 365 for Claude — mail, calendar, contacts and tasks, with confirm-gated sending

The current version, v0.1.1, was published to the official MCP registry on 2026-09-20. It is distributed as @chrischall/office-outlook-mcp on npm, filed under Email by this index, and declares 7 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.

In-path gate · all MCP tools

Using io.github.chrischall/office-outlook-mcp in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

uv tool install mcpindex-gate && mcpindex-config-wire
Auditable install path →Watch it hold a drift →
Trust verdict · v1 advisory · method
NOT YET SCREENEDno verdict on file

Verdict not yet evaluated for this tool. The semantic screen takes adversarial cases first; coverage rolls out as the corpus expands (15/150 labels to graduation). The deterministic conformance probe is built but has not yet run on the public corpus, so a recorded verdict here is REVIEW or UNVERIFIED, never a clearing ALLOW. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: the eval, four-state verdict, honest limits.

Own this server? Screen its description →

That verdict was true at screening time (snapshot 2026-09-21).

Contracts can change after screening, with no version bump. The gate pins io.github.chrischall/office-outlook-mcp’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.

See your first HOLD in 2 minutes →

Related: how to trust an MCP server · screen before install · silent contract drift

Environment variables
OUTLOOK_ACCESS_TOKEN
secret

Pre-obtained Outlook bearer token. Overrides the browser bridge. Power users / CI only; tokens last about 25 hours.

OUTLOOK_DISABLE_FETCHPROXY

Set to '1' to disable browser capture, requiring OUTLOOK_ACCESS_TOKEN.

OUTLOOK_API_BASE

Override the Outlook REST base URL. Defaults to https://outlook.office.com/api/v2.0.

OUTLOOK_WS_PORT

fetchproxy concentrator port used for token capture. Defaults to 37149, the fleet-wide shared port.

OUTLOOK_CAPTURE_TIMEOUT

Seconds to wait for the Outlook tab to make a request we can read a token from. Defaults to 30.

OUTLOOK_TOKEN_CACHE

Set to 'false' to stop caching the captured token between runs. Defaults to true.

OUTLOOK_TOKEN_FILE

Path to the cached token file. Defaults to ~/.office-outlook-mcp/token.json.

MCP quality score · maturity, not trust · methodology
freshness
25
completeness
10
installability
25
documentation
15
stability
5
Alternatives in Email
Mermail
app.mermail/mcp

Privacy-first email inboxes for AI agents with MCP mail tools and Composio connect/execute.

HiddenSwap
com.hiddenswap/swap

No-KYC crypto swaps, no account or email. Read-only quotes, coins, swap links, order status.

Fluxmail
io.github.churichard/fluxmail

Read, search, draft, send, and organize email through Gmail, Outlook, and IMAP/SMTP mailboxes.