GrabMail disposable email
io.grabmail/mcpgrabmail.iostreamable-httpv1.0.0Scanned
Disposable email for agents: create an inbox, wait for the message, read the code. No key needed.
6 tools: 1 can delete or cancel things, 1 change things and 4 only read.
- Reads private data · 3
- Reads text others write · 3
- Can send data out · 0
- No findings
Tools listed without sign-in. Remote posture
Anlyon alternative
2 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
6 tools
Deletes or cancels 1Claude Code: deny
delete_messageRemove a message now rather than waiting for it to expire.No findings
Why it is in this group
- The name "delete_message" says "delete": a word for removing or ending something.
Description, as the server wrote it Remove a message now rather than waiting for it to expire. Idempotent.
Changes things 1Claude Code: ask
create_inboxInvent a fresh, unused disposable email address you can give out immediately.No findings
Why it is in this group
- The name "create_inbox" says "create": a word for a change.
Description, as the server wrote it Invent a fresh, unused disposable email address you can give out immediately. Nothing is created or reserved server-side — an address exists as soon as mail arrives at it — so this never fails and needs no account. Public domains: grabmail.io, mixozia.com, linqmail.com. With a paid key sent as Authorization: Bearer, a premium-pool domain from list_domains works too.
Only reads 4Show 4 read-only tools
list_domainsThe public domains anyone may use.No findings
Why it is in this group
- The name "list_domains" says "list": a word for reading.
Description, as the server wrote it The public domains anyone may use. A domain of your own needs no account or key either — just an MX record pointing here. These public domains are on disposable-mail blocklists; if a form rejects them, see the premium pool noted in the result. With a paid key sent as Authorization: Bearer, the result also lists the premium-pool domain names.
list_messagesEverything waiting at an address, newest first.Reads private dataReads text others writeNo findings
Why it is in this group
- The name "list_messages" says "list": a word for reading.
What it can reach
- private-dataThe name "list_messages" says "list" and "message": it reads messages.
- untrusted-inputThe name "list_messages" says "list" and "message": it reads messages, which other people can write.
Description, as the server wrote it Everything waiting at an address, newest first. Returns immediately, including when the mailbox is empty — use wait_for_message if you are expecting something that has not arrived yet.
read_messageThe full message: sender, subject, plain text, HTML and any attachments.Reads private dataReads text others writeNo findings
Why it is in this group
- The name "read_message" says "read": a word for reading.
What it can reach
- private-dataThe name "read_message" says "read" and "message": it reads messages.
- private-dataThe description's first sentence says "message": it reads messages.
- untrusted-inputThe name "read_message" says "read" and "message": it reads messages, which other people can write.
- untrusted-inputThe description's first sentence says "message": it reads messages, which other people can write.
Description, as the server wrote it The full message: sender, subject, plain text, HTML and any attachments. This is where a confirmation code or a sign-in link will be. Read `text`: when the sender shipped HTML only, as most transactional mail does, it holds a plain-text rendering of that HTML rather than nothing, with link targets and image alt text kept.
wait_for_messageBlocks until a new message arrives at the address, then returns it in full — the tool to use after submitting a sign-up form.Reads private dataReads text others writeNo findings
Why it is in this group
- The name "wait_for_message" says "wait": a word for reading.
What it can reach
- private-dataThe name "wait_for_message" says "wait" and "message": it reads messages.
- private-dataThe description's first sentence says "message": it reads messages.
- untrusted-inputThe name "wait_for_message" says "wait" and "message": it reads messages, which other people can write.
- untrusted-inputThe description's first sentence says "message": it reads messages, which other people can write.
Description, as the server wrote it Blocks until a new message arrives at the address, then returns it in full — the tool to use after submitting a sign-up form. Waits at most 25 seconds and then returns with timed_out set to true; call it again to keep waiting. Optionally waits for a message from a particular sender or with particular words in the subject, ignoring anything else that arrives.
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged outbound.
- Reads private data3
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write3
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Remote posture
What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.
Looked at Oct 22, 2026, 15:08 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.
- Reachable
- yes
- HTTP status of an anonymous initialize
- 200
- tools/list served without credentials
- yes
- Tools that change things, listed without credentials
- 2
- Protocol version
- 2025-06-18
- WWW-Authenticate on 401
- not observed
- resource_metadata in WWW-Authenticate
- not observed
- RFC 9728 protected resource metadata
- not observed
- Authorization servers
- not observed
- Legacy HTTP+SSE transport
- no
- Dynamic client registration
- not observed
- Client ID metadata documents
- not observed
- HighThe whole server
The endpoint served tools/list without credentials, and the list has 2 tools that change things (1 destructive, 1 write). Whether a call also works without credentials was not tested: tools are never called.
What this check looks forMatched text
https://grabmail.io/mcp: tools/list returned 6 tools to an anonymous client, including delete_message (destructive), create_inbox (write)
Findings
Matches of fixed checks, with the text they matched.
No check matched anything in these tool definitions. That is not a safety guarantee.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http grabmail https://grabmail.io/mcpclaude mcp add --transport http grabmail https://grabmail.io/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__grabmail__list_domains",
"mcp__grabmail__list_messages",
"mcp__grabmail__read_message",
"mcp__grabmail__wait_for_message"
],
"ask": [
"mcp__grabmail__create_inbox"
],
"deny": [
"mcp__grabmail__delete_message"
]
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as grabmail. Review it before you use it.
Capability tags behind 3 rules
- mcp__grabmail__list_messages private-data, untrusted-input
- mcp__grabmail__read_message private-data, untrusted-input
- mcp__grabmail__wait_for_message private-data, untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/io.grabmail/mcp/verify?hash=18fe653b410ed275329b19358e02fd8f3ff47d3cf344a0b5f19f07b25994104b" | jq -e '.changed == false'Pinned hash 18fe653b410e, from Oct 21, 2026, 19:16 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/io.grabmail/mcp/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
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[](https://anlyon.dev/servers/io.grabmail/mcp)Source: MCP Registry. Synced Oct 21, 2026, 18:52 UTC.