com.npubmail/npubmail
npubmail
Is the npubmail MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-01.
Email inbox for AI agents, owned by a Nostr key. No signup or API key. Receive codes, read, send.
alive probed 2026-11-14 · unchanged since 2026-11-01
- Bundle
- https://github.com/obvioussummer46/npubmail/releases/download/v0.2.1/npubmail-mcp-0.2.1.mcpb (MCPB, for a client that installs bundles; probed in a container with the network off)
- Host
- github.com
- Reports itself as
- npubmail 0.2.1
- Capabilities
- logging, tools
- Instructions
- 351 characters
- Of a 1M window
- 0.3 % of a 1M context window
- Count
- 2.9k tokens in Claude Opus 5.5, exact, measured 2026-11-01. With the Claude Code prefix mcp__…__ on each tool name: 3.0k. The o200k_base estimate is 1.6k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/obvioussummer46/npubmail
- Website
- https://npubmail.com
- Registry
- active, updated 2026-10-08 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.77×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| send_email | 442 | 250 | 15 % |
| wait_for_code | 304 | 172 | 11 % |
| wait_for_email | 285 | 161 | 10 % |
| wallet_setup | 276 | 156 | 10 % |
| create_alias | 253 | 143 | 9 % |
Compare this server with others.
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Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.