de.briefflink/letter
Briefflink – Briefe mit KI versenden
Send real paper letters from AI chat: print, envelope, postage, delivery. Pay per letter.
alive probed 2026-10-19 · HTTP 200
4tools
≈ 701tokens, estimate
≈ 0.4 %of Claude's 200k window
0.5×the median server
2.8 sto initialize
2.1 sto list tools
- Endpoint
- https://briefflink.de/api/mcp.php (streamable-http)
- Host
- briefflink.de
- Protocol
- 2025-06-18
- Reports itself as
- briefflink 1.0.0
- Capabilities
- tools
- Instructions
- 556 characters
- Of a 1M window
- ≈ <0.1 % of a 1M context window, estimate
- Claude count
- The count_tokens endpoint refused the tool schemas: invalid x-api-key. The estimate stands in.
- Website
- https://briefflink.de/ai/
- Registry
- active, updated 2026-10-19 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
Estimates with the o200k_base tokenizer.
| Tool | o200k estimate | Share of this server |
|---|---|---|
| send_letter | 386 | 55 % |
| get_letter_price | 202 | 29 % |
| get_letter_status | 61 | 9 % |
| create_upload_link | 52 | 7 % |
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 Anthropic count_tokens endpoint refused the tool schemas (invalid x-api-key). A client that validates schemas can refuse them too.
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