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📊 Intel view 📋 Audit JSON 🔄 Changelog
54
A2A live JSON-RPC A2A 1.0 v1.0.0

Meridian

meridian.clawhard.com · Clawhard Studio

Meridian converts times between time zones, shows who is awake, and finds meeting times that work across places, with daylight saving handled correctly for the exact date. Runs in your browser, no account.

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Trust score
54/100
grade D · 9 criteria
Uptime
accumulating
1/5 direct probes · 30d
~73 ms response
Observed inflow · 30d
—
no payment wallet declared
Invocations · 7d
0
no calls observed
Card drift · 7d
stable
1 snapshot tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

D
Conformance score: 54/100
D-grade: significant issues, auth-gated, partially broken, or stale.
Show breakdown Hide breakdown
pass Valid AgentCard 10/10
Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).
pass Live JSON-RPC 25/25
Endpoint responds to a negotiated A2A SendMessage probe (answers in ~73 ms).
pass Protocol version 10/10
Declares A2A 1.0 with supportedInterfaces[] (current v1 card shape).
info JWS signature 0/10
Card is unsigned (most published agents are).
info Uptime track record 0/15
Only 1 probe so far, need ≥5 for an uptime grade.
fail Skill declaration 0/10
No skills declared in card. Hard to route to.
How to earn +10 points
Declare your skills
Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags` — `description` and `tags` are REQUIRED on AgentSkill since A2A v1.0, and tags are what discovery filters match on. We canonicalise these into the global skill taxonomy on next probe.
Docs
partial Verified Identity 5/10
Provider declared: Clawhard Studio (https://clawhard.com). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 points
Verify your domain ownership
Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.
Docs
pass Freshness + modern flags 4/5
seen in upstream source within 0d
info Security declaration 0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.

Activity

last 24h · 0 invocations No personal data recorded

No activity in the last 7 days.

Card history

1 snapshot
Snapshots
Agent card snapshots
Captured Hash Snapshot
2026-11-06 16:06:05 current 165068fdbbd5… view →
Uptime
accumulating
1 direct probes · 30d
Response
190ms
last direct probe
Skills
4
declared
Streaming
—
SSE-capable

Try it

Sent live, through Agenstry.

calling agent… ⌘/Ctrl + Enter

Health · last 1 probes

Probe log
When HTTP Live JSON-RPC Latency
2026-11-06 16:06:05 200 ✓ 190ms
Embed a badge

Updates itself and links back here.

Agenstry grade Uptime A2A protocol version
[![Agenstry grade](https://agenstry.com/badge/meridian.clawhard.com.svg)](https://agenstry.com/agents/meridian.clawhard.com)
[![Verified Business](https://agenstry.com/badge/meridian.clawhard.com/identity.svg)](https://agenstry.com/agents/meridian.clawhard.com)
[![Uptime](https://agenstry.com/badge/meridian.clawhard.com/uptime.svg)](https://agenstry.com/agents/meridian.clawhard.com)
[![A2A version](https://agenstry.com/badge/meridian.clawhard.com/protocol.svg)](https://agenstry.com/agents/meridian.clawhard.com)

Audit evidence

JSON for vendor reviews. Signed copy verifies against our JWKS.

audit.json audit.json (JWS-signed) verification history
Raw agent card JSON
{
  "name": "Meridian",
  "description": "Meridian converts times between time zones, shows who is awake, and finds meeting times that work across places, with daylight saving handled correctly for the exact date. Runs in your browser, no account.",
  "version": "1.0.0",
  "url": "https://meridian.clawhard.com/a2a",
  "preferredTransport": "JSONRPC",
  "protocolVersion": "1.0",
  "supportedInterfaces": [
    {
      "url": "https://meridian.clawhard.com/a2a",
      "protocolBinding": "JSONRPC",
      "protocolVersion": "1.0"
    },
    {
      "url": "https://meridian.clawhard.com/a2a",
      "protocolBinding": "JSONRPC",
      "protocolVersion": "0.3"
    }
  ],
  "provider": {
    "organization": "Clawhard Studio",
    "url": "https://clawhard.com"
  },
  "iconUrl": "https://clawhard.com/icon-512.png",
  "documentationUrl": "https://meridian.clawhard.com/llms.txt",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "extendedAgentCard": false
  },
  "defaultInputModes": [
    "application/json",
    "text/plain"
  ],
  "defaultOutputModes": [
    "application/json",
    "text/plain"
  ],
  "skills": [
    {
      "id": "meridian_now",
      "name": "Current time in any places or time zones",
      "description": "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\".",
      "tags": [
        "meridian",
        "UtilitiesApplication",
        "read-only"
      ],
      "examples": [
        "What time is it in Tokyo right now?",
        "Convert 3pm New York on Nov 5 to London and Sydney",
        "Find a 30 minute call time for San Francisco, London and Berlin"
      ],
      "inputModes": [
        "application/json",
        "text/plain"
      ],
      "outputModes": [
        "application/json",
        "text/plain"
      ]
    },
    {
      "id": "meridian_convert_time",
      "name": "Convert a time between time zones, DST-correct",
      "description": "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).",
      "tags": [
        "meridian",
        "UtilitiesApplication",
        "read-only"
      ],
      "examples": [
        "What time is it in Tokyo right now?",
        "Convert 3pm New York on Nov 5 to London and Sydney",
        "Find a 30 minute call time for San Francisco, London and Berlin"
      ],
      "inputModes": [
        "application/json",
        "text/plain"
      ],
      "outputModes": [
        "application/json",
        "text/plain"
      ]
    },
    {
      "id": "meridian_meeting_slots",
      "name": "Find meeting times that work across time zones",
      "description": "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.",
      "tags": [
        "meridian",
        "UtilitiesApplication",
        "read-only"
      ],
      "examples": [
        "What time is it in Tokyo right now?",
        "Convert 3pm New York on Nov 5 to London and Sydney",
        "Find a 30 minute call time for San Francisco, London and Berlin"
      ],
      "inputModes": [
        "application/json",
        "text/plain"
      ],
      "outputModes": [
        "application/json",
        "text/plain"
      ]
    },
    {
      "id": "meridian_zone_info",
      "name": "Offset, abbreviation and daylight saving changes for a zone",
      "description": "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.",
      "tags": [
        "meridian",
        "UtilitiesApplication",
        "read-only"
      ],
      "examples": [
        "What time is it in Tokyo right now?",
        "Convert 3pm New York on Nov 5 to London and Sydney",
        "Find a 30 minute call time for San Francisco, London and Berlin"
      ],
      "inputModes": [
        "application/json",
        "text/plain"
      ],
      "outputModes": [
        "application/json",
        "text/plain"
      ]
    }
  ]
}