HTTP 426 upgrade-required for Claude Code
io.github.sadri-dridi/http-426
Meaning of HTTP 426.
client:Claude Code
transport:streamable-http
tools:31
Install HTTP 426 upgrade-required in Claude Code
run in your project directory
claude mcp add --transport http http-426 https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-426/mcpAdds it for this project only. Append --scope user to make it available everywhere. Claude Code docs
What Claude Code can do once it is connected
- http-426
- utc-time
- timezone
- validate-json
- normalize-url
- inspect-robots
- domain-shape
- citation
- compatibility
- status-catalog
- iana-zones
- web-fetch
- fetch-status
- github-repo-shape
- weather-hint
- memory-key-count
- file-path-ok
- browser-url-ok
- think-steps
- search-query-len
- hn-front-count
- lib-docs-hint
- playwright-url-ok
- figma-url-shape