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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "emailens": {
      "type": "http",
      "url": "https://emailens.dev/api/mcp"
    }
  }
}

claude mcp add --transport http emailens https://emailens.dev/api/mcp

[mcp_servers.emailens]
url = "https://emailens.dev/api/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "emailens": {
      "type": "remote",
      "url": "https://emailens.dev/api/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "emailens": {
      "type": "http",
      "url": "https://emailens.dev/api/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=emailens&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vZW1haWxlbnMuZGV2L2FwaS9tY3AifQ%3D%3D"
}

{
  "servers": {
    "emailens": {
      "type": "http",
      "url": "https://emailens.dev/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "emailens": {
      "httpUrl": "https://emailens.dev/api/mcp"
    }
  }
}

extensions:
  "emailens":
    enabled: true
    name: "emailens"
    type: streamable_http
    uri: "https://emailens.dev/api/mcp"
    timeout: 300

Quality 91 / 100strong

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene100 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations13 of 13 tools declare readOnlyHint or destructiveHint
pass
tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
pass
tools.token_costabout 1,862 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changes4 tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvabledeps.dev does not know @emailens/[email protected]

13 tools, about 1,862 tokens to load them all · tool set e51c1436319d · tools last changed 2026-10-06 · checked 2026-10-20 01:29 UTC

Tool changes

2026-10-06sandbox_get_messageadded
Get complete email details: HTML/text body, parsed headers, spam score, SPF/DKIM/DMARC auth status, and validated links.
2026-10-06sandbox_wait_for_emailadded
Poll and wait for a matching incoming test email in the sandbox (ideal for auth OTPs, magic links, transactional email assertions).
2026-10-06sandbox_list_messagesadded
List recently captured test emails in the Emailens sandbox.
2026-10-06sandbox_get_inboxadded
Retrieve or auto-create your Emailens sandbox test email address for capturing test emails.

Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 75 / 100

provenance90

liveness27

freshness100

hygiene100

+repository +namespace-matches-repo +website -unreachable(1 failures) +updated-0d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

@emailens/[email protected] npmthis version is not known to the dependency resolver

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://emailens.dev/api/mcp` streamable-http	none	yes	92%	866 ms	2025-11-25	2026-10-20

package	registry	version	runtime	secrets
`@emailens/mcp`	npm	0.12.0	npx	`EMAILENS_API_KEY`

Tools (13)

`analyze_email`read-only	Quick CSS compatibility analysis , returns warnings and per-client scores.
`audit_email`read-only	Comprehensive quality audit , CSS compatibility, spam, links, accessibility, images, inbox preview, size, templates, content overflow, visual bugs.
`build_email`	Generate a cross-client-compatible email from a brief using Emailens's self-healing loop (generate → score across 21 clients → repair). Output stays in the framework you choose. Returns a runId immediately , poll get_build_status for progress and the final code. Requires a Pro/Team API key.
`check_deliverability`read-only	Check email deliverability for a domain , SPF, DKIM, DMARC, MX, BIMI.
`diff_emails`read-only	Compare two email HTML versions , shows score changes, fixed issues, and regressions per client.
`fix_email`read-only	Generate a structured fix prompt for email compatibility issues.
`get_build_status`read-only	Check a build_email run by runId , returns status, iteration, best compatibility score, and the current best source once available.
`list_clients`read-only	List all 21 supported email clients with IDs, names, rendering engines, dark mode support, and deprecation status. Use the returned IDs to filter other tools like preview_email or capture_screenshots.
`preview_email`read-only	Full email compatibility preview , transforms HTML for 21 email clients, analyzes CSS, generates scores, simulates dark mode, checks inbox preview and email size.
`sandbox_get_inbox`	Retrieve or auto-create your Emailens sandbox test email address for capturing test emails.
`sandbox_get_message`read-only	Get complete email details: HTML/text body, parsed headers, spam score, SPF/DKIM/DMARC auth status, and validated links.
`sandbox_list_messages`read-only	List recently captured test emails in the Emailens sandbox.
`sandbox_wait_for_email`read-only	Poll and wait for a matching incoming test email in the sandbox (ideal for auth OTPs, magic links, transactional email assertions).

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "io.github.emailens/mcp",
  "title": "Emailens MCP",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://emailens.dev/api/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.12.0",
  "packages": [
    {
      "version": "0.12.0",
      "transport": {
        "type": "stdio"
      },
      "identifier": "@emailens/mcp",
      "runtimeHint": "npx",
      "registryType": "npm",
      "environmentVariables": [
        {
          "name": "EMAILENS_API_KEY",
          "isSecret": true,
          "description": "API key for screenshots and sharing. Get one free at app.emailens.dev/dashboard/api"
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/emailens/mcp",
    "source": "github"
  },
  "websiteUrl": "https://emailens.dev/mcp",
  "description": "Analyze, audit, fix and diff HTML, MJML, Maizzle and React Email across 21 email clients."
}