dev.llms-txt-validator/llms-txt-validator
llms.txt Validator
Validate a site's llms.txt against the spec: fetches every linked URL, scores it 0-100.
alive probed 2026-10-08 · HTTP 200
3tools
415tokens in Claude Opus 5.5
454tokens in Claude Code
0.2 %of a 200k context window
231o200k_base estimate
1.2 sto initialize
586 msto list tools
- Endpoint
- https://llms-txt-validator.dev/mcp (streamable-http)
- Host
- llms-txt-validator.dev
- Protocol
- 2025-06-18
- Reports itself as
- llms.txt Validator 1.0.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-08. Counted again when the tool definitions change. Method.
- Website
- https://llms-txt-validator.dev
- Registry
- active, updated 2026-10-08 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| validate_llms_txt | 102 | 44 % |
| validate_llms_txt_content | 68 | 29 % |
| generate_llms_txt | 61 | 26 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/dev.llms-txt-validator/llms-txt-validator)
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.