Nil UUID shape is answering right now. Last checked 14 min ago. It exposes 31 tools. Last commit 23 Sep 2026.
Nil UUID shape
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 18 September 2026. No other catalogue keeps this.
Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.
claude mcp add uuid-nil-ok --transport http https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/uuid-nil-ok/mcp
https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/uuid-nil-ok/mcp
[mcp_servers.uuid-nil-ok]
url = "https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/uuid-nil-ok/mcp"
{
"mcpServers": {
"uuid-nil-ok": {
"url": "https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/uuid-nil-ok/mcp"
}
}
}
{
"servers": {
"uuid-nil-ok": {
"type": "http",
"url": "https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/uuid-nil-ok/mcp"
}
}
}
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
agent-ads-index
agent-tool-index
fetch-status
status-catalog
browser-url-ok
calc-eval
citation
compatibility
domain-shape
figma-url-shape
file-path-ok
hn-front-count
geo-hint
github-repo-shape
iana-zones
inspect-robots
jira-key-shape
search-query-len
lib-docs-hint
memory-key-count
normalize-url
people-search-index
playwright-url-ok
think-steps
timezone
utc-time
uuid-nil-ok
validate-json
weather-hint
web-fetch
wiki-title-ok
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/uuid-nil-ok/mcp | streamable-http | answering | 257 ms | 14 min ago |
UUID shape check
UUID v5 name-based shape
UUID max (all-ones) shape
UUID v1 time-based shape
Nil UUID constant
UUID v7 time-sortable shape
CUID shape check
ULID shape check
Answers built from our own checks of this server.