ALPN protocol token, value discarded
https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/alpn-ok/mcp ↗
Description
ALPN protocol token, value discarded
What our measurements say
ALPN protocol token, value discarded is a remote MCP server published at agent-observatory-sensor.nolimit-observatory.workers.dev. It has been probed 7 times since 9/12/2026. It answered in 7 of them (100.0%), a near-uninterrupted record. Median response time is 100 ms, placing it among the faster endpoints. It exposes a broad tool surface of 30 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Some tool names are descriptive (e.g., 'utc-time', 'validate-json')
- Consistent parameter structure across all tools
Weaknesses
- Many tool names are cryptic (e.g., 'alpn-ok', 'figma-url-shape')
- Descriptions often fail to explain use cases, only stating data discard
- All parameters are marked as optional, creating ambiguity
- Significant tool overlap (e.g., multiple URL/JSON validation tools)
- No error handling or constraint documentation
alpn-ok— Name and description provide no context for usageutc-time— Description lacks context for when to use itvalidate-json— Duplicates functionality with 'web-fetch' and 'normalize-url'timezone— Conflicts with 'utc-time' for time-related operationsweb-fetch— Redundant with 'fetch-status' and 'lib-docs-hint'
Verdict
Event narrative
Risk: low
Advice
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test passed (inspect-robots, 46ms)
- Cold-start: cold 40ms → warm 41ms (penalty 0ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
alpn-okALPN protocol token, value discarded
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
utc-timeCurrent UTC timestamp.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
timezoneCurrent time in a named IANA timezone.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
validate-jsonCheck whether a body is valid JSON. The body is discarded.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
normalize-urlReturn origin, host, and path for a URL. Query and fragment are dropped.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
inspect-robotsFetch a public robots.txt and return group counts only.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
domain-shapeSplit a hostname into labels without WHOIS or ownership data.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
citationReturn host, scheme, and HTTP status for a URL. Page content is not stored.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
compatibilityShow how this request is classified. No identifiers are retained.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
status-catalogShort catalog of common HTTP status codes.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
iana-zonesCommon IANA timezone names for clock calls.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
web-fetchHTTP status and content type for a public URL. Body discarded.
zonestringjsonstringurlstringhoststringcitystringquerystringpathstringrefstringfeedstring
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Legacy
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