Crovia — verifiable silence (TACET) and Crovia Seal
REMOTE · CROVIATRUST.COM · SCANNED SEP 21
Signed, Bitcoin-anchored observations of AI training-data disclosure; verifies silence proofs, seals
Available components
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
- 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. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- 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 750 tokens (~57/item across 13 items; 8 tools + 5 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management3
- Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage70
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 10% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 8 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 10 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
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.
remote · croviatrust.com
claude mcp add --transport http com-croviatrust-crovia 'https://croviatrust.com/mcp'
{
"mcpServers": {
"com-croviatrust-crovia": {
"url": "https://croviatrust.com/mcp"
}
}
} {
"servers": {
"com-croviatrust-crovia": {
"type": "http",
"url": "https://croviatrust.com/mcp"
}
}
} [mcp_servers.com-croviatrust-crovia] url = "https://croviatrust.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-croviatrust-crovia": {
"type": "remote",
"url": "https://croviatrust.com/mcp",
"enabled": true
}
}
} openclaw mcp add com-croviatrust-crovia --url 'https://croviatrust.com/mcp' --transport streamable-http
mcp_servers:
com-croviatrust-crovia:
url: "https://croviatrust.com/mcp" {
"McpServers": {
"com-croviatrust-crovia": {
"Transport": "http",
"Url": "https://croviatrust.com/mcp"
}
}
} assistant mcp add com-croviatrust-crovia -t streamable-http -u 'https://croviatrust.com/mcp'
{
"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.
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.
- 21 Sept 26 0
- Stability: unverified → 0.03 ▲ functional
- 20 Sept 26 65
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 21 Sept 2026 · Probed https://croviatrust.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=croviatrust.com | CN=WE1,O=Google Trust Services,C=US | 7 Aug 2026 | 5 Nov 2026 | ECDSA 256 | ECDSA-SHA256 | 8965f0d84b7eb637136888fb4cf73a94 |
| SANs: croviatrust.com, *.croviatrust.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 croviatrust.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| croviatrust.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 |
|---|---|
| strict-transport-security | max-age=63072000; includeSubDomains; preload |
| content-security-policy | default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://cdn.jsdelivr.net; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://*.croviatrust.com https://api.drand.sh https://mempool.space https://blockstream.info; frame-ancestors 'none'; base-uri 'self'; form-action 'self' |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=(), interest-cohort=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://croviatrust.com/mcp | Verified | 200 | |
| http (plaintext) | http://croviatrust.com/mcp | HTTPS enforced | 301 | https://croviatrust.com/mcp |
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 →
crovia_status Live TACET totals ~57
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.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
crovia_vs_causari Crovia vs Causari ~37
Disambiguate Crovia (AI training-data disclosure observatory) from Causari (code-provenance developer tool).
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
explain Definitions ~48
Canonical definitions of Crovia terms: tacet, silence, lacuna, seal, epoch, pnx, predicate, canon. Without a term, returns all.
| Name | Type | Req | Description |
|---|---|---|---|
| term | string | – | – |
No output schema declared.
No examples provided.
get_silence_proof Get a silence proof ~91
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.
| Name | Type | Req | Description |
|---|---|---|---|
| include_bundle | boolean | – | – |
| model | string | – | – |
No output schema declared.
No examples provided.
lookup_model Look up a model ~90
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.
| Name | Type | Req | Description |
|---|---|---|---|
| model | string | yes | Hugging Face model id, org/name |
No output schema declared.
No examples provided.
search_models Search observed models ~51
Find observed models by substring of their id (e.g. 'mistral'). Returns id, live status, last result and record URL.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | – |
| query | string | – | – |
No output schema declared.
No examples provided.
silence_report Weekly Silence Report ~58
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'.
| Name | Type | Req | Description |
|---|---|---|---|
| week | string | – | – |
No output schema declared.
No examples provided.
verify_seal Verify a seal or proof ~102
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).
| Name | Type | Req | Description |
|---|---|---|---|
| check_anchors | boolean | – | – |
| seal | object|string | – | – |
| url | string | – | – |
No output schema declared.
No examples provided.
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.