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MCP server · Communication

JMAP Email

by · github.com/mikluko/jmap-mcp

Email management via JMAP — mailboxes, messages, identities, and Sieve scripts

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Scored 7 months ago · breakdown

About JMAP Email

JMAP Email is an MCP server published by mikluko in the Communication category: email management via JMAP — mailboxes, messages, identities, and Sieve scripts.

The repository has 2 stars and 0 forks, with the last commit 3 months ago. Recent commit activity is the strongest signal that reported issues will get attention.

Install

From source
git clone https://github.com/mikluko/jmap-mcp

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

Tools (2)

mailbox_get`Mailbox/get`

Parameters not published.

mailbox_set`Mailbox/set`

Parameters not published.

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README

jmap-mcp

MCP server exposing JMAP email and Sieve script operations as tools.

Built with the Go MCP SDK (go-sdk) and go-jmap library.

Tools

Tools map closely to JMAP methods. Email mutation tools provide structured convenience wrappers over Email/set patches.

Mailbox (RFC 8621)

Tool JMAP Method Description
mailbox_get Mailbox/get Get mailboxes by ID, or list all
mailbox_set Mailbox/set Create, update, or destroy mailboxes

Email (RFC 8621)

Tool JMAP Method Description
email_query Email/query Search emails with filters, returns IDs and total count
email_get Email/get Get full content of emails by ID
email_create Email/set Create a new email draft in the Drafts mailbox
email_move Email/set Move emails to a different mailbox
email_flag Email/set Set or remove flags (seen, flagged, answered, draft)
email_delete Email/set Delete emails (move to Trash or permanently destroy)

Identity

Tool JMAP Method Description
identity_get Identity/get List sender identities (email addresses)

Submission (feature-gated)

Tool JMAP Method Description
email_submission_set EmailSubmission/set Submit a draft for delivery (requires -enable-send)

Sieve Scripts (RFC 9661, feature-gated)

Tool JMAP Method Description
sieve_get SieveScript/get List all scripts, or get one with full content (requires -enable-sieve)
sieve_set SieveScript/set Create, update, or destroy Sieve scripts (requires -enable-sieve)
sieve_validate SieveScript/validate Validate a Sieve script without saving (requires -enable-sieve)

Configuration

Env var Required Description
JMAP_SESSION_URL always JMAP session endpoint (e.g. https://api.fastmail.com/jmap/session)
JMAP_AUTH_TOKEN stdio mode Bearer token for JMAP authentication
Flag Default Description
-mode stdio Server mode: stdio or http
-listen :8080 HTTP listen address (http mode only)
-enable-send false Enable the email_submission_set tool (off by default)
-enable-sieve false Enable Sieve script tools (off by default, requires JMAP server support)

In HTTP mode, the token can be passed per-request via Authorization: Bearer <token> header or jmap_token query parameter (query parameter takes precedence).

Installation

Kubernetes (Helm)

helm install jmap-mcp oci://ghcr.io/mikluko/helm-charts/jmap-mcp \
  --version 0.1.0 \
  --set jmap.sessionURL="https://api.fastmail.com/jmap/session"

In HTTP mode, JMAP auth tokens are passed per-request via Authorization: Bearer header or ?jmap_token= query parameter — no static tokens are stored in the cluster.

Binary

go install github.com/mikluko/jmap-mcp@latest

From source

git clone https://github.com/mikluko/jmap-mcp.git
cd jmap-mcp
make install

Usage

# stdio mode (default)
export JMAP_SESSION_URL=https://api.fastmail.com/jmap/session
export JMAP_AUTH_TOKEN=your-token
./jmap-mcp

# HTTP mode
./jmap-mcp -mode http -listen :8080

Build

make build # Build and push container image + Helm chart
make image # Build and push container image with ko
make package # Package and push Helm chart to OCI registry
make test # Run tests
make install # Install binary locally

References

README copy captured when this server was indexed; it may lag the repository. The original is authoritative.

Questions

About JMAP Email

How do I install JMAP Email?

No package has been published for this server, so install it from source: clone the repository and follow its README.

Is JMAP Email safe to use with an AI agent?

Its trust score is 34 out of 100 (low). It passes 1 of the 1 static security checks run so far. It has no ConduID identity yet, so agent calls to it are not receipted.

Is JMAP Email still maintained?

Yes — the last commit was 3 months ago. The repository has 2 stars and 0 forks.