com.postboxservices/postbox-tools
postbox-tools
Free email checks: 24 blacklists, spoofing/BEC grade, redirect tracing, email spam test, WHOIS.
alive probed 2026-10-05 · HTTP 200
8tools
1.6ktokens in Claude Opus 5.5
1.6ktokens in Claude Code
0.8 %of a 200k context window
883o200k_base estimate
322 msto initialize
208 msto list tools
- Endpoint
- https://mcp.postboxservices.com/mcp (streamable-http)
- Host
- mcp.postboxservices.com
- Protocol
- 2025-11-25
- Reports itself as
- postbox-tools 0.1.1
- Capabilities
- tools
- Instructions
- 434 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Website
- https://postboxservices.com/mcp/
- Registry
- active, updated 2026-09-26 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| trace_redirect | 142 | 16 % |
| check_blacklist | 137 | 16 % |
| analyze_eml | 135 | 15 % |
| create_mailtest | 110 | 12 % |
| check_spoofability | 108 | 12 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 13:34 | alive | 322 ms | 8 | 1.6k | 883 |
| 2026-10-05 00:19 | alive | 393 ms | 8 | 883 | |
| 2026-10-04 09:57 | alive | 1.1 s | 8 | 883 | |
| 2026-10-04 07:51 | alive | 582 ms | 8 | 883 | |
| 2026-10-03 20:31 | alive | 665 ms | 8 | 883 | |
| 2026-10-03 17:49 | alive | 1.3 s | 8 | 883 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/com.postboxservices/postbox-tools)
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.