io.github.emailens/mcp
Emailens MCP
Analyze, audit, fix and diff HTML, MJML, Maizzle and React Email across 21 email clients.
alive probed 2026-10-13 · HTTP 200
13tools
2.7ktokens in Claude Opus 5.5
2.8ktokens in Claude Code
1.4 %of a 200k context window
1.5ko200k_base estimate
929 msto initialize
480 msto list tools
- Endpoint
- https://emailens.dev/api/mcp (streamable-http)
- Host
- emailens.dev
- Protocol
- 2025-11-25
- Reports itself as
- emailens 0.9.1
- Capabilities
- prompts, tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-06. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/emailens/mcp
- Website
- https://emailens.dev/mcp
- Registry
- active, updated 2026-10-13 · registry entry
- Reachable
- 7 of the last 9 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| build_email | 231 | 15 % |
| audit_email | 151 | 10 % |
| preview_email | 146 | 10 % |
| sandbox_wait_for_email | 143 | 10 % |
| check_deliverability | 137 | 9 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-13 11:15 | alive | 1.2 s | 13 | 2.7k | 1.5k |
| 2026-10-08 11:13 | alive | 2.1 s | 13 | 2.7k | 1.5k |
| 2026-10-06 10:59 | alive | 2.4 s | 13 | 2.7k | 1.5k |
| 2026-10-05 14:42 | alive | 929 ms | 9 | 2.1k | 1.2k |
| 2026-10-05 00:34 | alive | 736 ms | 9 | 1.2k | |
| 2026-10-04 10:04 | alive | 2.6 s | 9 | 1.2k | |
| 2026-10-04 07:58 | alive | 2.5 s | 9 | 1.2k | |
| 2026-10-03 20:37 | error | ||||
| 2026-10-03 17:53 | error |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.emailens/mcp)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.