Meridian
REMOTE · MERIDIAN.CLAWHARD.COM
Convert times between zones with daylight saving right, see who is awake, find meeting slots.
Available components
Last scanned (22 hours ago)
Scores higher than 55% of remote servers
Reachable. Last reached 4 Nov 2026.
Category Productivity and Notes
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS check failed: the endpoint is reachable over plaintext HTTP. See how to fix → View diagnostics → Fail
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability86
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 1025 tokens (~102/item across 10 items; 4 tools + 6 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management7
- Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
- Supports UI / widget rendering.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +1
- The server rewrote its instructions, which are the text every model session reads security
- 3 Nov 26 0
- Tool “meridian_convert_time” rewrote its description, which is the text the model reads security
- Tool “meridian_meeting_slots” rewrote its description, which is the text the model reads security
- Tool “meridian_now” rewrote its description, which is the text the model reads security
- Tool “meridian_zone_info” rewrote its description, which is the text the model reads security
- Stability: unverified → 0.03 ▲ functional
- 2 Nov 26 69
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 4 Nov 2026 · Probed https://meridian.clawhard.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=clawhard.com | CN=WE1,O=Google Trust Services,C=US | 2 Nov 2026 | 31 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | d390e782d0a7bf6e13fee2f61b0da983 |
| SANs: clawhard.com, meridian.clawhard.com, *.meridian.clawhard.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of meridian.clawhard.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| clawhard.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://meridian.clawhard.com/mcp | Verified | 200 | |
| http (plaintext) | http://meridian.clawhard.com/mcp | Served over HTTP | 200 |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
meridian_convert_time Convert a time between time zones, DST-correct ~282
Use when you need to convert a specific wall-clock time from one place to others, for any date. It uses the real tz database, so daylight saving is right for that exact date (the US and Europe switch on different weeks), and it warns when the time does not exist (spring forward) or happens twice (fall back). Time accepts "15:00", "3:30pm", "noon", "now" or an ISO local time like 2026-11-05T15:00 (no Z). Date defaults to today in the source zone. Returns {input, utc, source:{...}, converted:[{place, zone, local, time_12h, date, utc_offset, abbreviation, day_note, hours_ahead_of_source}], warning?, summary, open_url}.
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | – | Optional date YYYY-MM-DD in the source zone. Default today. |
| from | string | yes | Source place or zone, e.g. "New York" or "America/New_York". |
| time | string | yes | Local time in the source place, e.g. "15:00", "3:30pm", "noon", "now", "2026-11-05T15:00". |
| to | array | yes | Destination places, e.g. ["London","Tokyo"]. |
No output schema declared.
No examples provided.
meridian_meeting_slots Find meeting times that work across time zones ~219
Use when you need to schedule a call across several places. Scans the day in 15-minute steps and ranks start times so the most people are inside working hours and nobody is at night, using each place's real offset and DST for that date. Returns up to 5 slots with each person's local start and end, and says plainly when no time works for everyone. Defaults: working hours 9 to 17, 60 minutes, date today in the first place.
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | – | How many slots to return, default 5. |
| date | string | – | Date YYYY-MM-DD, local to the first place. Default today. |
| duration_minutes | integer | – | Meeting length in minutes, multiple of 15. Default 60. |
| end_hour | integer | – | Working day end hour, default 17. |
| places | array | yes | Where each attendee is, e.g. ["San Francisco","London","Tokyo"]. |
| start_hour | integer | – | Working day start hour, default 9. |
No output schema declared.
No examples provided.
meridian_now Current time in any places or time zones ~116
Use when you need to know what time or date it is right now somewhere. You have no clock of your own, so never guess the current time. Returns the real current time, date, UTC offset, abbreviation and daylight saving status for each place. Places can be cities ("Tokyo"), IANA zones ("Europe/Paris"), abbreviations ("PST") or "UTC+5:30".
| Name | Type | Req | Description |
|---|---|---|---|
| places | array | yes | Cities, IANA zones or abbreviations, e.g. ["London","Asia/Tokyo"]. |
No output schema declared.
No examples provided.
meridian_zone_info Offset, abbreviation and daylight saving changes for a zone ~135
Use when you need to answer "what is the UTC offset of X", "does X observe daylight saving" and "when do the clocks change". Returns the current offset and abbreviation, whether the place observes DST, every clock change in the year with exact local before and after times, and the next change. Abbreviations like IST or CST are ambiguous, so the answer says which zone was used.
| Name | Type | Req | Description |
|---|---|---|---|
| place | string | yes | City, IANA zone or abbreviation, e.g. "London" or "America/Phoenix". |
| year | integer | – | Year to list clock changes for. Default this year. |
No output schema declared.
No examples provided.
How do I install the Meridian MCP server?
Meridian is a hosted endpoint at https://meridian.clawhard.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · meridian.clawhard.com
claude mcp add --transport http com-clawhard-meridian 'https://meridian.clawhard.com/mcp'
What is the Meridian MCP server?
Meridian is an MCP server listed in the public MCP registry as com.clawhard/meridian. Convert times between zones with daylight saving right, see who is awake, find meeting slots. This page covers its hosted endpoint (https://meridian.clawhard.com/mcp).
Is the Meridian MCP server safe to use?
Meridian scores 70 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Meridian MCP server expose?
Meridian exposes 4 tools: meridian_now, meridian_convert_time, meridian_meeting_slots, meridian_zone_info. Their descriptions and schemas cost roughly 752 tokens of context every time the server is loaded.
Does the Meridian MCP server require authentication?
No. We connected to Meridian without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Meridian MCP server still maintained?
Meridian is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.