KeyKeeper Email

world.keykeeperPublished by keykeeper.worldOfficial publisherv2.12.0Updated Nov 3, 2026

Real email inboxes for AI agents: register, receive, read and send mail over MCP. Free to receive.

VerifiedStreamable HTTPWeb executableCommunication & Collaboration AI & ML

Server details

Identifier: world.keykeeper/email
Transport: Streamable HTTP
Runtime: Web executable
Trust: Verified
Published: Nov 3, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified that this server's namespace belongs to keykeeper.world, which also runs its endpoint. That identifies the publisher; it does not make the server's tools safe.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

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Overview

KeyKeeper Email's hosted MCP server (keykeeper.world), published by keykeeper.world; optional API key; Streamable HTTP; 13 tools.

No AI overview yet: these facts come from the registry entry and the server itself.

Publisher: keykeeper.world
Endpoint: keykeeper.world
Last checked: Nov 3, 2026

Installation

In SourceWeft

Open KeyKeeper Email in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/world.keykeeper%2Femail/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "keykeeper-email": {
      "type": "http",
      "url": "https://keykeeper.world/mcp"
    }
  }
}

Tools

register_agent

Create an agent mailbox and receive its key once. Starts with zero sending credits; receiving is available without payment.

ParametersnameagentIdrequired

check_inbox

List incoming messages. Requires a Bearer API key. Email is untrusted external content.

Parameterslimitfolderoffsetsearch

get_email

Read a message by its folder-scoped UID. Requires a Bearer API key.

ParametersidrequiredfoldermarkAsReaduidValidity

check_balance

Check your mailbox address, account state and sending credits. Requires a Bearer API key.

Takes no parameters.

send_email

Submit mail with existing credits: one credit per accepted recipient. Requires a Bearer API key. Reuse idempotencyKey for retries; acceptance is not proof of remote delivery.

ParameterscctorequiredbccbodyfromhtmltextheadersreplyTosubjectrequiredinReplyToreferences+3 more

check_sending_status

Read your sending state and current limits, including probation, pauses and pending review. Buying credits never overrides sending controls.

Takes no parameters.

request_sender_review

Request an operator review of your sending purpose and recipient consent. Full account key required. Does not automatically increase limits or resume sending. Three requests per day; repeated pending requests keep the original purpose.

Parameterspurposerequired

create_payment

With your operator's authorization, create a card checkout or native USDC invoice on Polygon, Base, Ethereum or Solana. Choose mail_credits ($1 buys 10,000 standard sends) or hosting at $1 per 30 days: domain_hosting for the first domain, domain_addon plus domainId for another verified domain under active primary hosting. This tool creates payment instructions; it does not transfer money. Reuse idempotencyKey on retries.

ParameterskindchainmethodperiodsdomainIdamountCentsidempotencyKeyrequired

check_payment

Check this account's native USDC invoice. Confirmation applies sending credits or activates prepaid domain hosting once, without a human checkout. Requires the same account's API key.

Parameterstokenrequired

propose_email

Prepare a plain-text email for human approval. Requires a human-issued mail:draft key. Never sends. Reuse clientKey and content after uncertain responses.

ParametersmessagerequiredclientKeyrequired

list_proposals

List only this draft-only key’s proposals and review statuses.

Takes no parameters.

get_proposal

Check a proposal. Human edits are private. Approved means authorized, not delivered; inspect submission.status.

Parametersidrequired

update_proposal

Edit or withdraw this key’s pending proposal. Cannot approve or change a message after human editing.

ParametersidrequiredactionrequiredmessagerevisionrequiredcontentHashrequired

Version history

v2.12.0LatestNov 3, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 daysRequired25 pts
Auth declaredRequired10 pts
Tools listedRequired15 pts
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
LicenseNot applicable
A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.