Name: Multi Mail
Author: yybd

Multi Mail MCP

Several Gmail accounts: search, read, draft, send, labels and Google Calendar. Own OAuth client.

Grade A Local · stdio No auth needed 17 tools v0.2.1 MIT

No reviews yet by yybdnpm Runs on your machine, nothing hosted

96/100

trust score

tools declared

local

runs on your machine

—

downloads a day

What it does

Several Gmail accounts: search, read, draft, send, labels and Google Calendar. Own OAuth client.

Quickstart

# 1 — add it to Claude Code
claude mcp add --scope user yybd-multi-mail-mcp '--' npx -y @yybd/multi-mail-mcp

# 2 — ask your agent for something these tools do
#   list_accounts, search_emails, read_email and 14 more

Multi Mail costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.

Publishernot claimed

yybd2 servers

2 categories

All 2 servers

Collected from a public index. Nobody has claimed this account, so nothing here was written by its author — claim it if it is yours.

Installation

Where are you running it?

Every route below installs the same thing and ends at the same approval screen. This one runs on your machine: your client starts Multi Mail as a process under your own user, with your files and your network, so the tool surface below is what it can do to your computer rather than to a server somewhere else. Its scan result is on the Security tab — read the surface before you approve it.

Claude Codedeclared by this listing

This is a public server: you run it yourself and this marketplace is not in the path. You need Node.js — the current LTS (24) is the safe choice; npx comes with it. Claude Code registers it in one command; --scope user makes it available in every project. The '--' is in quotes so that PowerShell passes it on.

claude mcp add --scope user yybd-multi-mail-mcp '--' npx -y @yybd/multi-mail-mcp

Reconnect, or start a new session, and the tools appear in the model’s tool list.

Free on mcprush, and it runs from its publisher’s own package: this marketplace is not in the path, so there is no key of ours to hold and no card to add.

What it asks of you

Nothing is required, but it can take MULTI_MAIL_DEFAULT (Account used when a tool call names none (email or alias)), MULTI_MAIL_HOME (Folder holding credentials.json and account tokens (default ~/.multi-mail)), MULTI_MAIL_SEND (Set to off for drafts-only mode: no tool can send mail), MULTI_MAIL_TZ (IANA time zone for calendar tools, overriding each calendar's own setting) if you want to set them.

What it writes

One config entry your client uses to start the process locally. A local server runs with your file system and your network, which is why it is priced without metering.

What you approve

17 tools, with what each one reads, writes and reaches shown before you agree — the same list on every route above. Read the tool surface.

Tool surface

What the model actually sees. Descriptions are diffed on every release — see version history.

Only tools that write or reach the network

Read from its source code. A server that builds its tool list when it starts can list more tools than this.

List the Gmail accounts this server can use. Call it first when the user has not said which mailbox, or to learn the aliases to pass as "account" to every other tool. Returns each account's email, alias, and whether labels and calendar are enabled for it, the default account if one is set, and…

No parameter schema on file.

Search one mailbox, or all of them with account="all", using Gmail search syntax. Returns id, thread id, date, from, to, subject and snippet — use read_email for the full body. An empty query lists the newest mail.

Parameter	Type	Required	Notes
account	string	no	Email, alias, or "all" to search every connected mailbox.
query	string	no	Gmail query, e.g. "from:bank is:unread newer_than:30d".
max_results	integer	no	How many messages to return (1–100). With account="all", the newest across all mailboxes.
page_token	string	no	nextPageToken from a previous call (single account only).

Read one message in full: from, to, cc, reply-to, date, subject, labels, the body as plain text (HTML is converted to text), and the list of attachments with part_id, name, type and size. Use it after search_emails when you need what a single message says; use read_thread instead for the whole…

Parameter	Type	Required	Notes
account	string	no	Which mailbox: email address, alias, or local part. Optional when only one account is connected.
message_id	string	yes	The message id ("id") returned by search_emails or list_drafts.
max_chars	integer	no	Longest body to return, in characters (default 20,000). Raise it for long newsletters or legal text.

Read a whole conversation: every message in the thread, oldest first, each with the same fields as read_email (headers, plain-text body, attachment list). Use it when the reply history matters, such as before answering or summarising a back-and-forth; use read_email for a single message. max_chars…

Parameter	Type	Required	Notes
account	string	no	Which mailbox: email address, alias, or local part. Optional when only one account is connected.
thread_id	string	yes	The "threadId" returned by search_emails or read_email.
max_chars	integer	no	Total characters for all bodies together (default 40,000), split evenly between the messages.

List every label of one mailbox: system labels such as INBOX, UNREAD, STARRED, SENT, and the user's own labels (Gmail's folders), each with its id, name and type, sorted by name. Use it to find the exact name for a "label:" search in search_emails, or the name or id to pass to modify_labels. Works…

Parameter	Type	Required	Notes
account	string	no	Which mailbox: email address, alias, or local part. Optional when only one account is connected.

Save a message (new or reply) in Gmail Drafts without sending it. The safe default for writing.

Parameter	Type	Required	Notes
account	string	no	Mailbox to write from (email, alias or local part).
to		no	Recipients: "a@x.com, Name <b@y.com>" or a list. Optional when replying.
cc		no	Cc recipients, same format as "to".
bcc		no	Bcc recipients, same format as "to". They are not shown to the other recipients.
subject	string	no	Optional when replying ("Re: …" is added).
body	string	yes	Plain-text body.
html	string	no	Optional HTML version of the body.
reply_to_message_id	string	no	Reply in the thread of this message id.
reply_all	boolean	no	With reply_to_message_id and no "to": copy all original recipients.

Send a message (new or reply) immediately. Only when the user explicitly asked to send; confirm recipients, subject and body with them first.

Parameter	Type	Required	Notes
account	string	no	Mailbox to write from (email, alias or local part).
to		no	Recipients: "a@x.com, Name <b@y.com>" or a list. Optional when replying.
cc		no	Cc recipients, same format as "to".
bcc		no	Bcc recipients, same format as "to". They are not shown to the other recipients.
subject	string	no	Optional when replying ("Re: …" is added).
body	string	yes	Plain-text body.
html	string	no	Optional HTML version of the body.
reply_to_message_id	string	no	Reply in the thread of this message id.
reply_all	boolean	no	With reply_to_message_id and no "to": copy all original recipients.

List the drafts saved in one mailbox: for each, the draftId (needed by send_draft), the message id, thread id, date, recipients, subject and a short snippet. Use it to check what is waiting to be sent, or to find a draft made earlier with create_draft. To read a draft's full text, pass its message…

Parameter	Type	Required	Notes
account	string	no	Which mailbox: email address, alias, or local part. Optional when only one account is connected.
max_results	integer	no	How many drafts to return (1–100).

Send an existing draft. Only when the user explicitly asked to send it.

Parameter	Type	Required	Notes
account	string	no	Which mailbox: email address, alias, or local part. Optional when only one account is connected.
draft_id	string	yes	draftId from create_draft or list_drafts.

Download one attachment of a message and return its contents. Text files and PDFs with a text layer come back as text, PNG/JPEG/GIF/WebP images (up to 5 MB) as an image you can see; any other file, and a scanned PDF, is saved under ~/.multi-mail/attachments and its path is returned with a note.…

Parameter	Type	Required	Notes
account	string	no	Which mailbox: email address, alias, or local part. Optional when only one account is connected.
message_id	string	yes	Message id from search_emails or read_email.
part_id	string	no	partId from the attachments list of read_email.
filename	string	no	Attachment file name, when part_id is not known.
save	boolean	no	Also save the file under ~/.multi-mail/attachments.
max_chars	integer	no	Longest text to return for text and PDF files (default 50,000); longer text is cut and marked.

Add or remove labels on specific messages, or on every message of a thread. This is how to mark read (remove UNREAD), mark unread (add UNREAD), archive (remove INBOX), star (add STARRED), or file mail under a label. Labels are names in any case, or ids from list_labels; unknown names return an…

Parameter	Type	Required	Notes
account	string	no	Which mailbox: email address, alias, or local part. Optional when only one account is connected.
message_ids	array	no	Message ids to change.
thread_id	string	no	Change every message in this thread instead.
add	array	no	Labels to add.
remove	array	no	Labels to remove.

Create a new user label in one mailbox and return its id and name, ready for modify_labels. Use it when the user wants mail filed under a label that list_labels does not show yet. A "/" makes a nested label, e.g. "Projects/Acme". Fails if a label with that name already exists. Only for accounts…

Parameter	Type	Required	Notes
account	string	no	Which mailbox: email address, alias, or local part. Optional when only one account is connected.
name	string	yes	The new label's name; "/" nests it under a parent.

List calendar events between two times, earliest first, across every calendar the user sees in Google Calendar (the primary one and those ticked in the sidebar), for one account or for every calendar-enabled account with account="all". Each event has its title, start and end with the time-zone…

Parameter	Type	Required	Notes
account	string	no	Account (email, alias, local part) or "all" for every calendar-enabled account. Optional with one.
from		yes	—
to		yes	—
query	string	no	Free-text filter (title, description, location, attendees).
max_results	integer	no	How many events to return (1–250), earliest first.
time_zone	string	no	IANA time zone for reading and writing times, e.g. Asia/Jerusalem. Default: MULTI_MAIL_TZ, else the calendar's own setting.

Find open slots of at least the given length inside working hours on the chosen weekdays, checked against the busy times of every calendar the user sees (of every calendar-enabled account with account="all"). Returns the slots with start, end and length, the time zone used, and which calendars…

Parameter	Type	Required	Notes
account	string	no	Account (email, alias, local part) or "all" for every calendar-enabled account. Optional with one.
from		yes	—
to		yes	—
minutes	integer	no	Length of the meeting.
day_start	string	no	Start of the working day, HH:MM (default 09:00).
day_end	string	no	End of the working day, HH:MM (default 18:00).
weekdays	array	no	Allowed days, 0 = Sunday … 6 = Saturday. E.g. [0,1,2,3,4] for Sunday–Thursday.
max_slots	integer	no	How many free slots to return at most (1–50), earliest first.
time_zone	string	no	IANA time zone for reading and writing times, e.g. Asia/Jerusalem. Default: MULTI_MAIL_TZ, else the calendar's own setting.

Create an event on the account's own primary calendar and return its id, times and link. Nobody is invited and no email goes out, so it is safe for holding a slot or adding a reminder; to meet with others, draft them an email instead. Give "end", or "minutes" (default 60), or all_day. Times…

Parameter	Type	Required	Notes
account	string	no	Which mailbox: email address, alias, or local part. Optional when only one account is connected.
summary	string	yes	Title.
start		yes	—
end	string	no	End, same formats as start.
minutes	integer	no	Length in minutes when "end" is not given (default 60).
all_day	boolean	no	An all-day event on the date of "start" (through the date of "end", if given).
description	string	no	Notes shown in the event.
location	string	no	Place or meeting link.
time_zone	string	no	IANA time zone for reading and writing times, e.g. Asia/Jerusalem. Default: MULTI_MAIL_TZ, else the calendar's own setting.

Search every connected Gmail account (Gmail query syntax). Returns result ids for the fetch tool.

Parameter	Type	Required	Notes
query	string	yes	Gmail search query.

Full text of a message returned by the search tool (id is "account:messageId").

Parameter	Type	Required	Notes
id	string	yes	A result id from the search tool, in the form "account:messageId".

Free

$0 forever

Every tool, no call limit
No card, and mcprush charges nothing for it
Source published under MIT
Runs on your machine — nothing of it reaches our gateway
Nothing to cap, because mcprush bills nothing

Nothing here is billable: mcprush charges nothing to install Multi Mail or to call it, at any volume.

ATrust score 96 / 100

Release 0.2.1 · scanned 8 Nov 2026

Two independent axes, because powerful and malicious are different questions. The grade is threat only. The capability level is blast radius, and it is never a penalty on the grade — it is priced as one subtract-only term in the score, where you can see it.

Threat score100

Client score96

Findings1 threat · 1 capability

Capabilitymoderate

Coveragesource

Verificationrepo

Surface digesta22d4f29b372fa08af881efdd25c8f1e29edfc4a49dad4ecdba5c3ea59d0ffee

Score vectorthreat 100 → client 96

Term	Level	What it prices	Points
capability-exposure	moderate	capability blast radius (moderate) — client exposure if the model is manipulated	−3
verification-discount	repo	publisher verification (public source) — no provenance, but the source is public and inspectable	−1
coverage-honesty	source	inspection depth (source) — how much of the target the scan could see	−0

score = clamp(round(threatScore − E_cap − E_ver − E_cov), 0, 100). No model, no opinion, no network call at scoring time: the same methodology version against the same bytes always produces this number, and every line above is a field of the report rather than a summary of it.

What the scan could actually read

A grade is only as meaningful as its coverage, so the scanner publishes its own depth before it publishes its result.

Tool surfaceread

Implementation sourceread

Package metadataread

Live transportnot available

Tools were statically extracted from the published source (17 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command "npx -y <package>".

1 of the 17 recovered tools are registered only when canSend holds (dist/mcp.js:134) — typically when a key or option is configured. They are part of the server's surface and were analysed; a server started without that configuration exposes only the other 12.

1 of the 17 recovered tools are registered only when canSend holds (dist/mcp.js:151) — typically when a key or option is configured. They are part of the server's surface and were analysed; a server started without that configuration exposes only the other 12.

3 of the 17 recovered tools are registered only when listAccounts().some(hasCalendarScope) holds (dist/mcp.js:206) — typically when a key or option is configured. They are part of the server's surface and were analysed; a server started without that configuration exposes only the other 12.

Capability — what it could do if the model were manipulated

Tags derived from each tool’s schema and the implementation, not from what the tool calls itself. moderate is the level these add up to.

12 tools are registered unconditionally · (1) 1 more only when canSend holds (dist/mcp.js:134) · (2) 1 more only when canSend holds (dist/mcp.js:151) · (3) 3 more only when listAccounts().some(hasCalendarScope) holds (dist/mcp.js:206) — typically when a key or option is configured. All 17 are in the table below and were analysed; the conditional ones are marked.

Tool	Capability tags	Why the tag was assigned
list_accounts	no tags
search_emails	no tags
read_email	untrusted-input	untrusted-input: keyword "read_email"
read_thread	no tags
list_labels	no tags
create_draft	state-write	state-write: declares readOnlyHint: false
send_email conditional (1)	external-sink	external-sink: keyword "send_email", declares readOnlyHint: false, openWorldHint: true
list_drafts	no tags
send_draft conditional (2)	external-sink	external-sink: declares readOnlyHint: false, openWorldHint: true
get_attachment	untrusted-input	untrusted-input: keyword "download"
modify_labels	state-write	state-write: declares readOnlyHint: false
create_label	state-write	state-write: declares readOnlyHint: false
list_events conditional (3)	no tags
find_free_time conditional (3)	no tags
create_event conditional (3)	state-write	state-write: declares readOnlyHint: false
search	no tags
fetch	untrusted-input	untrusted-input: keyword "fetch"

Toxic-flow graph

The lethal trifecta, checked as a graph rather than as a checklist: untrusted input, a sensitive source and an external sink have to meet before there is a path worth worrying about.

flow-1

Untrusted input can drive an external action even though no sensitive source is exposed.

Supply chain and provenance

Integrityfirst-seen

Surface digesta22d4f29b372fa08

Scanned2026-11-08

This is the first scan of this surface here, so there is nothing yet to compare it against.

Every result on this tab comes from one deterministic pass over the published package — offline, rule by rule, and auditable line by line above. Same methodology version, same bytes, same score.