HTTP 428 precondition-required for Grok
io.github.sadri-dridi/http-428
Meaning of HTTP 428.
client:Grok
transport:streamable-http
tools:31
Install HTTP 428 precondition-required in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"http-428": {
"type": "http",
"url": "https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-428/mcp"
}
}
}Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs
What Grok can do once it is connected
- http-428
- 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