MCP VerifyThe rating layer for AI agents

agent-observatory-sensor.nolimit-observatory.workers.dev/s/antlr-ok/mcp

Graded A by MCP Verify under grade/v1, sealed in snapshot REL-SNAP-084 on 27 October 2026. Recorded reachable in 40 of 40 observations since 18 September 2026.

The record behind itOne mark per snapshot, and every grade sealed along the way.

grade/v1
sealed in REL-SNAP-084

Sealed grades: UNGRADED from REL-SNAP-045 to REL-SNAP-057, A from REL-SNAP-058 to REL-SNAP-084.

  • Reachable
  • Reachable, asked to sign in or pay
  • Not reachable
  • Not observed
Transport
streamable-http
Tools listed
31
Tool schema fingerprint
ab3aaa0ee59980c6…changed 2 times on the record
Name reported by the server
ANTLR grammar rule count, body discardedself-reported, never used as identity
Registry names (not anchored)
io.github.sadri-dridi/antlr-okas the registry listed it; not covered by the chain
First and last observed
18 Sep 2026 to 27 Oct 2026

Observations

Newest first. Each row is a separate look, not a summary.

Observed (UTC)SnapshotRecorded asLatencyToolsTool schema
2026-10-27 09:29REL-SNAP-084OK50 ms31ab3aaa0ee59980c6…
2026-10-26 09:29REL-SNAP-083OK72 ms31ab3aaa0ee59980c6…
2026-10-25 09:25REL-SNAP-082OK54 ms31ab3aaa0ee59980c6…
2026-10-24 09:23REL-SNAP-081OK69 ms31ab3aaa0ee59980c6…
2026-10-23 10:35REL-SNAP-080OK45 ms31ab3aaa0ee59980c6…
2026-10-22 10:10REL-SNAP-079OK52 ms31ab3aaa0ee59980c6…
2026-10-21 09:51REL-SNAP-078OK54 ms31ab3aaa0ee59980c6…
2026-10-20 10:20REL-SNAP-077OK48 ms31ab3aaa0ee59980c6…
Show all 40 observations
2026-10-19 10:31REL-SNAP-076OK58 ms31ab3aaa0ee59980c6…
2026-10-18 09:32REL-SNAP-075OK65 ms31ab3aaa0ee59980c6…
2026-10-17 09:31REL-SNAP-074OK46 ms31ab3aaa0ee59980c6…
2026-10-16 09:43REL-SNAP-073OK52 ms31ab3aaa0ee59980c6…
2026-10-15 09:47REL-SNAP-072OK46 ms31ab3aaa0ee59980c6…
2026-10-14 09:53REL-SNAP-071OK47 ms31ab3aaa0ee59980c6…
2026-10-13 09:55REL-SNAP-070OK58 ms31ab3aaa0ee59980c6…
2026-10-12 10:36REL-SNAP-069OK99 ms31ab3aaa0ee59980c6…
2026-10-11 09:29REL-SNAP-068OK51 ms31ab3aaa0ee59980c6…
2026-10-10 09:30REL-SNAP-067OK45 ms31ab3aaa0ee59980c6…
2026-10-09 09:33REL-SNAP-066OK47 ms31ab3aaa0ee59980c6…
2026-10-08 09:44REL-SNAP-065OK54 ms31ab3aaa0ee59980c6…
2026-10-07 09:56REL-SNAP-064OK62 ms31ab3aaa0ee59980c6…
2026-10-06 09:30REL-SNAP-063OK47 ms31ab3aaa0ee59980c6…
2026-10-05 10:19REL-SNAP-062OK46 ms31ab3aaa0ee59980c6…
2026-10-04 09:46REL-SNAP-061OK43 ms31ab3aaa0ee59980c6…
2026-10-03 09:39REL-SNAP-060OK40 ms31ab3aaa0ee59980c6…
2026-10-02 09:36REL-SNAP-059OK61 ms31ab3aaa0ee59980c6…
2026-10-01 09:40REL-SNAP-058OK43 ms31ab3aaa0ee59980c6…
2026-09-30 10:04REL-SNAP-057OK62 ms31ab3aaa0ee59980c6…
2026-09-29 10:00REL-SNAP-056OK44 ms31ab3aaa0ee59980c6…
2026-09-28 10:13REL-SNAP-055OK50 ms31ab3aaa0ee59980c6…
2026-09-27 09:59REL-SNAP-054OK52 ms31ab3aaa0ee59980c6…
2026-09-26 09:46REL-SNAP-053OK42 ms31ab3aaa0ee59980c6…
2026-09-25 10:09REL-SNAP-052OK47 ms31ab3aaa0ee59980c6…
2026-09-24 10:13REL-SNAP-051OK57 ms31ab3aaa0ee59980c6…
2026-09-23 10:17REL-SNAP-050OK52 ms31a59ec17b86b04248…
2026-09-22 09:56REL-SNAP-049OK44 ms303c99a53932f3c49c…
2026-09-21 09:40REL-SNAP-048OK48 ms303c99a53932f3c49c…
2026-09-20 09:59REL-SNAP-047OK46 ms303c99a53932f3c49c…
2026-09-19 09:43REL-SNAP-046OK54 ms303c99a53932f3c49c…
2026-09-18 09:57REL-SNAP-045OK48 ms303c99a53932f3c49c…

Checking this record

Each observation above is a leaf of the merkle root published with its snapshot. A proof shows a record is in the archive. It does not show the measurement is correct.

Latest root, REL-SNAP-084

ed182ac44848117a98c9536eabbd63d33a756c4db072812094c742e3fa1fdef6

Published at

gist.github.com/181cc5f4834e0a4f812acde9a5efdb95

Is agent-observatory-sensor.nolimit-observatory.workers.dev/s/antlr-ok/mcp reliable?
Its sealed grade is A (grade/v1, sealed in REL-SNAP-084). Grades run from A to F by how consistently an endpoint was recorded reachable. A grade describes the record; it is not a guarantee.
When was it last checked?
27 October 2026, in snapshot REL-SNAP-084, where it was recorded as OK.
Has its tool list changed?
Yes. Its tool schema fingerprint changed 2 times on the record. Each change is dated in the observations below.