# Crovia — verifiable silence (TACET) and Crovia Seal (remote · croviatrust.com)

Signed, Bitcoin-anchored observations of AI training-data disclosure; verifies silence proofs, seals

- Trust score: 65/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-21

## Components

- remote · `croviatrust.com`: 65/100 (this document), [markdown](https://verifymcp.io/servers/com-croviatrust-crovia/croviatrust.md), [page](https://verifymcp.io/servers/com-croviatrust-crovia/croviatrust)

## Channel facts

- Endpoint: `https://croviatrust.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `2.0.0`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-21.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 8 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 86/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 750 tokens (~57/item across 13 items; 8 tools + 5 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 3/100
  - Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 70/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 10% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 8 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 10 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Crovia — verifiable silence (TACET) and Crovia Seal MCP server?

Crovia — verifiable silence (TACET) and Crovia Seal is a hosted endpoint at https://croviatrust.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.

### Claude

```bash
claude mcp add --transport http com-croviatrust-crovia 'https://croviatrust.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-croviatrust-crovia": {
      "url": "https://croviatrust.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-croviatrust-crovia": {
      "type": "http",
      "url": "https://croviatrust.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-croviatrust-crovia]
url = "https://croviatrust.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-croviatrust-crovia": {
      "type": "remote",
      "url": "https://croviatrust.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-croviatrust-crovia --url 'https://croviatrust.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-croviatrust-crovia:
    url: "https://croviatrust.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-croviatrust-crovia": {
      "Transport": "http",
      "Url": "https://croviatrust.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-croviatrust-crovia -t streamable-http -u 'https://croviatrust.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-croviatrust-crovia": {
      "type": "http",
      "url": "https://croviatrust.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-21 (score 65, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-09-20 (score 65)

First indexed and scored.

## MCP tools (8)

### `crovia_status` (~57 tokens)

Live TACET totals

Live totals of Crovia's TACET log: epochs closed and anchored in Bitcoin, models on the map, negative snapshots, signed silence proofs, the longest verifiable silence and the latest weekly Silence Report. Every figure with its source URL.

### `lookup_model` (~90 tokens)

Look up a model

What Crovia has observed about one AI model (Hugging Face id, e.g. 'Qwen/Qwen3-32B'): latest verdict on the monitored surface, negative snapshots and how many are Bitcoin-anchored, the published silence proof if any, the 2026-archive silence, badge and record URLs.

Input parameters:

- `model` (string, required): Hugging Face model id, org/name

### `search_models` (~51 tokens)

Search observed models

Find observed models by substring of their id (e.g. 'mistral'). Returns id, live status, last result and record URL.

Input parameters:

- `limit` (integer)
- `query` (string)

### `get_silence_proof` (~91 tokens)

Get a silence proof

The published TACET silence proof for a model (or the index of all proofs): silence_days, observed window, epochs, seal id, URL, and how to verify it in the browser, in Python, or with verify_seal. Set include_bundle=true to receive the full crovia.seal.v1 bundle.

Input parameters:

- `include_bundle` (boolean)
- `model` (string)

### `verify_seal` (~102 tokens)

Verify a seal or proof

Verify a crovia.seal.v1 object or a wrapped TACET silence proof offline: signature, canonical bytes, bindings, per-epoch non-inclusion paths. Pass the object as 'seal' or a croviatrust.com URL as 'url'. check_anchors=true also checks the drand round and the Bitcoin anchors (network).

Input parameters:

- `check_anchors` (boolean)
- `seal` (object|string)
- `url` (string)

### `silence_report` (~58 tokens)

Weekly Silence Report

Facts of the weekly Silence Report: models observed, epochs closed and anchored, negative snapshots, proofs, longest verifiable silences. Latest week by default, or a given ISO week like '2026-W38'.

Input parameters:

- `week` (string)

### `explain` (~48 tokens)

Definitions

Canonical definitions of Crovia terms: tacet, silence, lacuna, seal, epoch, pnx, predicate, canon. Without a term, returns all.

Input parameters:

- `term` (string)

### `crovia_vs_causari` (~37 tokens)

Crovia vs Causari

Disambiguate Crovia (AI training-data disclosure observatory) from Causari (code-provenance developer tool).

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-croviatrust-crovia/croviatrust#diagnostics

## Score history

- 2026-09-21: 65
- 2026-09-20: 65

## Common questions

### What is the Crovia — verifiable silence (TACET) and Crovia Seal MCP server?

Crovia — verifiable silence (TACET) and Crovia Seal is an MCP server listed in the public MCP registry as com.croviatrust/crovia. Signed, Bitcoin-anchored observations of AI training-data disclosure; verifies silence proofs, seals. This page covers its hosted endpoint (https://croviatrust.com/mcp).

### Is the Crovia — verifiable silence (TACET) and Crovia Seal MCP server safe to use?

Crovia — verifiable silence (TACET) and Crovia Seal scores 65 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 Crovia — verifiable silence (TACET) and Crovia Seal MCP server expose?

Crovia — verifiable silence (TACET) and Crovia Seal exposes 8 tools: crovia_status, lookup_model, search_models, get_silence_proof, verify_seal, and 3 more. Their descriptions and schemas cost roughly 534 tokens of context every time the server is loaded.

### Does the Crovia — verifiable silence (TACET) and Crovia Seal MCP server require authentication?

No. We connected to Crovia — verifiable silence (TACET) and Crovia Seal without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Crovia — verifiable silence (TACET) and Crovia Seal MCP server still maintained?

Crovia — verifiable silence (TACET) and Crovia Seal is still listed as active in the MCP registry. We last reached this channel on 21 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://croviatrust.com/mcp
- Repository: https://github.com/croviatrust/countersign
- Website: https://croviatrust.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-croviatrust-crovia/croviatrust.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-croviatrust-crovia/croviatrust.json
- HTML version of this page: https://verifymcp.io/servers/com-croviatrust-crovia/croviatrust