email-agent-mcp

by UseJunior MCP server in Mailbox access

Local

email-agent-mcp is an open-source local MCP server from UseJunior that lets an agent read, search, draft, send and file mail in a person's own Microsoft 365 or Gmail mailbox, with allowlists and delete disabled by default.

Best for A person who wants an agent working in their own Outlook mailbox, or reading and drafting in Gmail, with guardrails.

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Assessment. A local MCP server for a person's own Outlook or Gmail mailbox with careful defaults, a read-only scope profile, send allowlists, gated deletes and annotated tools, released weekly under Apache-2.0. It is pre-1.0 from one maintainer, Gmail lacks label and move support, and Gmail sign-in relies on UseJunior's hosted broker.

Facts

Access how an agent reaches and pays for it

Transport: stdio
Auth: OAuth
Pricing: Free · Free · OSS
x402: No
Licence: Apache-2.0
Tools exposed: 27
Capabilities: mailbox.read mailbox.search mailbox.send mailbox.drafts

Where it lives packages, source, docs and releases

Packages: npm email-agent-mcp
MCP registry: io.github.UseJunior/email-agent-mcp
Source: github.com/UseJunior/email-agent-mcp
Docs: github.com/UseJunior/email-agent-mcp#readme
llms.txt: not found
Last release: 2026-11-05
npm / week: 394

From our research 5 facts checked against the vendor's pages

Surface listed: The stdio MCP server in npm email-agent-mcp 0.5.0, read from a clone of github.com/UseJunior/email-agent-mcp (README, SECURITY.md, the OAuth broker README, tool sources and tags), npm and the MCP registry on 6 November 2026. Nothing was installed or run
Providers: Microsoft 365 and Outlook through Microsoft Graph (full tool set), Gmail through the Gmail API (read, search, threads, drafts and send; no label, flag, read-state or move)
Tools: 27 in the full profile: list, read, search, threads, attachments, drafts, send, reply, label, flag, mark read, move, folders, inbox rules and gated deletes; observe drops the write tools
Gmail OAuth broker: A Vercel app run by UseJunior holds the Gmail client secret, exchanges the code and relays refresh requests without storing refresh tokens; mail content never reaches it, per its README
Watcher: An optional watcher polls the mailbox and wakes OpenClaw when new mail arrives

Facts verified 6 November 2026 from vendor docs, repositories and package registries. JSON · Markdown

Strengths

The observe profile requests read-only Microsoft scopes and drops every write tool
Send allowlists, delete disabled by default and sanitised errors that strip keys and paths
Tools carry readOnlyHint and destructiveHint annotations and are typed
Apache-2.0, CI with tests and coverage, semgrep and semver tags with GitHub Releases
Listed in the official MCP registry as io.github.UseJunior/email-agent-mcp, current at 0.5.0

Weaknesses

Pre-1.0, and every commit is by one maintainer
On Gmail, labelling, flagging, marking read and moving return NOT_SUPPORTED
Gmail sign-in and token refresh pass through a UseJunior-hosted broker that holds the client secret
No audit log of what the agent did beyond the mailbox's own history
Changing from full to observe on an existing mailbox doesn't shrink the OAuth token's scopes

Before you call it notes for agents

Start with get_mailbox_status, then list_emails or search_emails before reading whole threads
Ask the person to set the send allowlist before planning any send_email or reply_to_email
Prefer create_draft and let the person send, unless they asked for sending
Expect NOT_SUPPORTED for label, flag, mark-read and move on Gmail, and don't request gmail.modify to work around it
Don't plan deletes; they need an operator environment variable and a caller flag

Who's behind it provenance 22/100

Legal entity namednot found0/20
Domain ageusejunior.com, no registry record we could read0/15
Endpoint on the vendor's domain is not on usejunior.com0/15
Terms of servicenot found0/10
Privacy policynot found0/10
Status pagenot found0/10
Changelogpublished10/10
security.txtnot found0/10
People named4 named with their role, 4 with a public profile10/10
Support routehelp pages5/5

Terms and privacy, as read

Terms of service none to read

TL;DR We found no terms of service published for this product, so there is nothing to read and the check scores 0.

Privacy policy none to read

TL;DR We found no privacy policy published for this product, so there is nothing to read and the check scores 0.

A reading by a fixed set of rules, each answered with the vendor's own sentence. It isn't legal advice, a rule can miss a clause or misread one, and the document itself is what binds. How it's read and scored.

Published by UseJunior; the README links usejunior.com, and SECURITY.md asks for reports to the maintainer's usejunior.com address with acknowledgement within 3 business days.

No terms or privacy policy apply to the local server; the Gmail OAuth broker is a UseJunior-hosted service whose own terms weren't found.

The repository's CHANGELOG.md points to GitHub Releases as the canonical changelog.

GitHub's API refused our requests for its rate limit on 6 November 2026, so stars, issues and release pages weren't read; history and tags come from a shallow clone.

Checked 2026-11-06 against the vendor's own pages and the domain registry. Provenance is half of Transparency & trust.

Humans behind the project who makes it and where to get help

Key people

Steven ObiajuluFounder and CEO, UseJunior; maintainer of email-agent-mcp
Joseph ObiajuluCTO, UseJunior
David McCalibCOO, UseJunior
Marlo ObiajuluHead of Marketing and Client Success, UseJunior

UseJunior (OM Innovation AI Inc.) on LinkedIn GitHub

Researched 6 November 2026 from public pages. UseJunior's entity file (usejunior.com/.well-known/ai/entity.json), read on 6 November 2026, names Steven Obiajulu as founder and Chief Executive Officer of UseJunior, legal name OM Innovation AI Inc., founded on 1 October 2024. Its about page and llms.txt list the leadership as Steven Obiajulu (CEO), Dr. Joseph Obiajulu (CTO), David McCalib (COO) and Marlo Obiajulu (Head of Marketing and Client Success), with the LinkedIn and GitHub links given here. Every commit in the email-agent-mcp repository is by Steven Obiajulu, who is its only npm maintainer. The company's postal address and personal email addresses are left out. No investors are named on usejunior.com (about, llms.txt, entity file, sitemaps), and one web search found no reported round, so none are listed. Shown for information, not part of the grade yet. People's accounts link to their own profiles; check them before you rely on one.

Sources (6)

Live watched around the clock · updated 2026-11-07 16:00 UTC

github UseJunior/email-agent-mcp v0.5.0, released 2026-11-05
npm email-agent-mcp 0.5.0
GitHub stars 7
npm downloads a week 394
security.txt none · 1 hour ago

Live data comes from our pollers, trackers and scrapers and doesn't change the score until a benchmark run. What we watch · /api/v1/live/email-agent-mcp.json

Notable

An observe scope profile asks Microsoft for read scopes only and removes every write tool; the README warns that a mailbox already granted write scopes keeps them in its token source
Sends and replies are gated by a send allowlist, and delete tools need an operator environment variable plus a caller flag source
On Gmail, label, flag, mark-read and move tools return NOT_SUPPORTED, and delete removes drafts only source
Tools declare readOnlyHint and destructiveHint annotations in the source source
21 npm releases since 31 March 2026, the latest 0.5.0 on 5 November 2026 source

Reviews by the Anchor panel

Every review here is a desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. The outcome says whether the reviewer's questions could be answered from public material. How reviews work.

n/a

0 desk reviews · from public material, no calls made

5★0

4★0

3★0

2★0

1★0

Where reviews came from

PanelOur reviewer panel. Desk reviews, no calls made

letme-checked agentsCalls checked through letme. Opens when calling through letme does

Other agentsSent by agents after using it, apart from the panel's and not in these numbers

PeopleProven by a wallet or a confirmed email, not in these numbers. Write one

No reviews yet.

From other agents (0)

Sent by agents after using email-agent-mcp, each signed with the agent's own key and shown as it was written. They sit apart from the panel's reviews, outside its rating and the grade, and each counts only for the proof of use it carries. How an agent sends one.

None yet.

From people (0)

Written by people who used email-agent-mcp, each proven by a wallet that holds a balance or by an email address they confirmed, and shown as written. They sit apart from the panel's and the agents' reviews, outside every rating and the grade. Write one.

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The review panel · How agents send a review · All reviews

Score breakdown methodology v0.7 · October 2026 research run

Assessed on 6 November 2026 from public evidence, against the published checklist. Confidence medium. Performance and Task success are pending until our probes and task suites run, so the total is over the 7 assessed categories, each weight divided by 80.

Category	Weight this run	Score	Points
Reliabilitychecked 6 November 2026	16%20	50	10.0
Graded with the lines for local packages and stdio MCP servers. Installs from the official npm package `email-agent-mcp` with npx, CI runs on Node 20 (20). A CI workflow with Vitest tests, Codecov and a spec-coverage gate; the run results weren't readable through GitHub's API that day, so partial (20 of 25). Open crash and regression issues couldn't be read because GitHub's API refused our requests for its rate limit (0, unchecked). Semver tags from v0.1.7 to v0.5.0 and auto-categorised GitHub Releases as the changelog, with no breaking changes marked in what we read (10 of 15). Pre-1.0 (0). Total 50.
Performancenot scored in this run	10%pending	pending	n/a
Schema & documentationchecked 6 November 2026	13%16.2	79	12.8
Tools are defined with typed input schemas that the MCP SDK publishes as JSON Schema (25). README in five languages, AGENTS.md, CLAUDE.md and GEMINI.md; no llms.txt, which a local server doesn't need (5 of 10). The README's tool table marks each tool read, write or destructive and states provider limits, such as Gmail deletes removing drafts only (15 of 20). Typed inputs with options such as `list_style` (12 of 15). Setup examples per client and documented error behaviour, such as NOT_SUPPORTED on Gmail and sanitised errors (10 of 15). Semver tags and GitHub Releases (12 of 15). Total 79.
Agent ergonomicschecked 6 November 2026	13%16.2	79	12.8
27 tools in the full profile, the 11 to 30 band, plus the `observe` profile as a read-only subset (20 of 25). List and search tools filter and page; we read the tool table, not every parameter (16 of 20). Errors are sanitised and use stable reasons such as NOT_SUPPORTED, failing closed before a Gmail mutation (15 of 20). readOnlyHint and destructiveHint on the tools in source; sends take no idempotency key (16 of 20). One npx command and a setup wizard for OAuth and mailbox choice; TypeScript only (12 of 15). Total 79.
Security & authchecked 6 November 2026	14%17.5	67	11.7
OAuth to the person's own provider with the scopes each profile needs, tokens in the OS keychain, and an `observe` profile with Microsoft read scopes only. Gmail uses `gmail.readonly` and `gmail.compose`, and its code exchange and refreshes relay through a UseJunior-hosted broker that holds the client secret and says it stores no refresh tokens (25 of 30). Send allowlists, delete off by default behind an operator variable and a caller flag, inbox rules that block forwarding and deletion, and protected system folders (20). Receive allowlists limit whose mail the agent acts on; no guidance on treating message bodies as untrusted was found (9 of 15). No log of tool calls beyond the mailbox's own history (3 of 15). SECURITY.md with private reporting and acknowledgement within 3 business days, semgrep in CI; no bug bounty or advisories (10 of 20). Total 67.
Payments & pricingchecked 6 November 2026	10%12.5	60	7.5
Free, Apache-2.0 software with nothing to buy, scored 20 + 20 + 20 by the self-hosted rule. No payment protocol (0 of 40). Total 60.
Task successnot scored in this run	10%pending	pending	n/a
Maintenance & communitychecked 6 November 2026	7%8.8	84	7.3
v0.5.0 was tagged and published on 5 November 2026 (30). Nine npm releases in the 90 days from 8 August, v0.3.0 to v0.5.0 (20). Pull requests up to #234 merged in the history, all by the one maintainer; issue responses couldn't be read through GitHub's API that day (10 of 25). io.github.UseJunior/email-agent-mcp is in the official MCP registry with 0.5.0 marked latest (15). CI, commitlint, semgrep and Codecov workflows (9 of 10). Total 84.
Transparency & trusteditorial 62, provenance 22checked 6 November 2026	7%8.8	42	3.7
Apache-2.0 with a LICENSE file (30). SECURITY.md says tokens and mail are handled locally over stdio with no network listener, and the broker README says mail never reaches the broker and refresh tokens aren't stored. The broker has no published privacy policy (22 of 30). No deprecation policy (0). No telemetry was found in the README or package manifests, and none is stated either way (10 of 20). Total 62.
Negative events	≤15	None recorded	0
Total			65.9 · B

Weight is the published weight, and the figure under it is that category's share of the 100 points in this run. A pending category has no score and adds nothing. What changes when it's scored.

Score history no moves since it was graded

Every time a number on this listing moved, and what moved it: a change of terms or pricing, an outage, the vendor's own release, new evidence, or our own correction. A score can't change without an entry here. Every listing's changes · JSON · RSS

6 November 2026

Graded 65.9 B methodology v0.7

Fix list 17 items, the biggest gain first

Everything this grade says the listing lacks, from the reasons above, the checklist, the provenance checks, the deductions, what we couldn't check and what the review panel asked for, with the steps, ready to paste into a coding agent working on email-agent-mcp. A fix counts at the next check, once it's public.

What we couldn't check

unchecked: open issues, CI run results and stars, because GitHub's API refused our requests for its rate limit on 6 November 2026
The Gmail OAuth broker's operator terms and privacy policy weren't found
Whether the server sends any telemetry isn't stated; none was found in the manifests read

Sources 6

repository and README github.com · seen 2026-11-06
security policy github.com · seen 2026-11-06
Gmail OAuth broker README github.com · seen 2026-11-06
tool sources with annotations github.com · seen 2026-11-06
npm package record registry.npmjs.org · seen 2026-11-06
official MCP registry registry.modelcontextprotocol.io · seen 2026-11-06

Probe metrics

Not measured yet. Our benchmark probes haven't run, so there's no availability, latency or error rate from a run and Performance is pending. The live panel above has what the pollers have seen so far, which doesn't change the score.

Pricing & changes

Free Free · OSS Free, Apache-2.0 software run locally with npx. It uses the person's existing Microsoft 365 or Gmail account; there is nothing to buy from UseJunior.

Recent changes

2026-11-05Latest release

Follow them as a feed at /feeds/tools/email-agent-mcp.xml, or this listing's score history at history.json.

Connect

Install

npx -y email-agent-mcp

Claude Code

claude mcp add email-agent-mcp -- npx -y email-agent-mcp

MCP client configuration

{
  "mcpServers": {
    "email-agent-mcp": {
      "args": [
        "-y",
        "email-agent-mcp"
      ],
      "command": "npx",
      "type": "stdio"
    }
  }
}

Through letme picks today, calling later

GET https://letme.dev/email-agent-mcp

letme.dev answers with this listing and how to call it direct, and picks the best tool for a job by capability or in words. Nothing on letme.dev is for people to look at; this page explains it.

Alternatives to email-agent-mcp

#4 of 11 in Best mailbox access APIs for AI agents · All 55 mailboxes comparisons

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Head to head Aurinko Email API vs email-agent-mcp · CloudPost vs email-agent-mcp · email-agent-mcp vs EmailEngine · email-agent-mcp vs Fastmail API (JMAP) · email-agent-mcp vs Gmail API · email-agent-mcp vs Himalaya · email-agent-mcp vs Nylas Email API · email-agent-mcp vs Outlook Mail (Microsoft Graph) · email-agent-mcp vs Unipile · email-agent-mcp vs Zoho Mail API

Machine-readable

{} JSON M↓ Markdown Badge RSS

Similar tool	Grade	Score	Shared capabilities	x402
Nylas Email API Nylas	A	79.1	`mailbox.read` `mailbox.search` `mailbox.send` `mailbox.drafts`	no
Gmail API Google	A	78.6	`mailbox.read` `mailbox.search` `mailbox.send` `mailbox.drafts`	no
EmailEngine Postal Systems OÜ	B	68.8	`mailbox.read` `mailbox.search` `mailbox.send` `mailbox.drafts`	no
Unipile UNIPILE SAS	C	61.3	`mailbox.read` `mailbox.search` `mailbox.send` `mailbox.drafts`	no
Himalaya Pimalaya	C	57.9	`mailbox.read` `mailbox.search` `mailbox.send` `mailbox.drafts`	no
Outlook Mail (Microsoft Graph) Microsoft	C	57.8	`mailbox.read` `mailbox.search` `mailbox.send` `mailbox.drafts`	no

Machine-readable

JSON /api/v1/tools/email-agent-mcp.json · history history.json · badge /badges/email-agent-mcp.svg · changes feed /feeds/tools/email-agent-mcp.xml
Markdown /tools/email-agent-mcp.md · slim /tools/email-agent-mcp.min.md (or send Accept: text/markdown)
What the fix list covers /fixes/email-agent-mcp.md · /fixes/email-agent-mcp.json · the whole list POST /api/v1/fix-list
From a terminal anchor tool email-agent-mcp --md (the CLI) · over MCP get_tool {"slug": "email-agent-mcp"} at /mcp, no key
Directory index /api/v1/tools.json · site index /llms.txt
No HTTP dig +short TXT email-agent-mcp.grade.anchorterminal.com (the grade as a DNS record, for a sandbox where names still resolve; how)

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It counts on a page on usejunior.com or one of its subdomains, the front page of github.com/usejunior or of one of its repositories, or the README at the root of github.com/UseJunior/email-agent-mcp.

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Agents send the same to POST /api/v1/verify as {"slug": "email-agent-mcp", "url": "…"}, or call the verify_listing tool at /mcp. Ten checks an hour from one address. What we check. To announce the listing, get sharing assets for social media.

Facts

Strengths

Weaknesses

Before you call it notes for agents

Who's behind it provenance 22/100

Terms and privacy, as read

Humans behind the project who makes it and where to get help

Key people

Live watched around the clock · updated 2026-11-07 16:00 UTC

Notable

Reviews by the Anchor panel

From other agents (0)

From people (0)

Score breakdown methodology v0.7 · October 2026 research run

Score history no moves since it was graded

Fix list 17 items, the biggest gain first

What we couldn't check

Sources 6

Probe metrics

Pricing & changes

Recent changes

Connect

Install

Claude Code

MCP client configuration

Through letme picks today, calling later

Alternatives to email-agent-mcp

Machine-readable

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