Deadbolt
REMOTE · DEADBOLT.CLAWHARD.COM
Check Supabase SQL for who can read and write each table: RLS gaps, open policies, grants, fix SQL.
Available components
Last scanned (20 hours ago)
Scores higher than 53% of remote servers
Reachable. Last reached 4 Nov 2026.
Category Security
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 Usability79
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 668 tokens (~167/item across 4 items; 2 tools + 2 resources), over budget; trim descriptions and params. See how to fix → Fail
- 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 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 2 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 4 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
- Stability: unverified → 0.03 ▲ functional
- 3 Nov 26 67
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://deadbolt.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 | 3 Nov 2026 | 1 Feb 2027 | ECDSA 256 | ECDSA-SHA256 | 9e16741eaca65d72138e07159e0e26fa |
| SANs: clawhard.com, deadbolt.clawhard.com, *.deadbolt.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 deadbolt.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://deadbolt.clawhard.com/mcp | Verified | 200 | |
| http (plaintext) | http://deadbolt.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 →
deadbolt_catalog_query Get the read-only SQL that snapshots a live Supabase database for Deadbolt ~95
Use when you need to check a live Supabase project rather than migration files: returns a read-only SQL query that reads table RLS settings, grants for anon and authenticated, policies, SECURITY DEFINER functions and storage buckets (never row data) and returns one JSON value. Run it with the user's Supabase SQL Editor or a Supabase MCP execute_sql tool, then pass the JSON to deadbolt_check_supabase_access.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
deadbolt_check_supabase_access Check who can read and write Supabase tables (RLS, policies, grants) ~360
Use when you write, review or are about to apply Supabase / PostgreSQL migration SQL (CREATE TABLE, RLS, CREATE POLICY, GRANT, views, SECURITY DEFINER functions, storage buckets), or when a user asks whether their Supabase data is exposed, whether RLS is set up right, or why a query returns 42501 permission denied or no rows. Replays the SQL with real Postgres rules and returns, per table, what signed-out (anon) and signed-in (authenticated) users can SELECT/INSERT/UPDATE/DELETE (all rows, own rows, some rows, none, or denied for a missing grant), plus findings with severity and ready-to-run fix SQL: RLS off, policies written but RLS never enabled, using(true) writes, personal columns readable by anyone, views that bypass RLS, SECURITY DEFINER functions anyone can call, user_metadata in policies, public bucket listing, grants missing after the Oct 30 2026 default change. Also accepts the JSON produced by deadbolt_catalog_query for the live database. Deterministic; never connects to any database. Run it before telling a user their schema is safe. Up to 200,000 characters.
| Name | Type | Req | Description |
|---|---|---|---|
| project_created_before_2026_10_30 | boolean | – | Only for SQL input. true (default): the project grants new public tables to anon and authenticated automatically (projects created before Oct 30, 2026). false: new tables get no grants unless the SQL… |
| sql | string | yes | Migration SQL (one or many files concatenated, in order), or the single JSON value returned by the catalog query. |
No output schema declared.
No examples provided.
How do I install the Deadbolt MCP server?
Deadbolt is a hosted endpoint at https://deadbolt.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 · deadbolt.clawhard.com
claude mcp add --transport http com-clawhard-deadbolt 'https://deadbolt.clawhard.com/mcp'
What is the Deadbolt MCP server?
Deadbolt is an MCP server listed in the public MCP registry as com.clawhard/deadbolt. Check Supabase SQL for who can read and write each table: RLS gaps, open policies, grants, fix SQL. This page covers its hosted endpoint (https://deadbolt.clawhard.com/mcp).
Is the Deadbolt MCP server safe to use?
Deadbolt scores 68 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 Deadbolt MCP server expose?
Deadbolt exposes 2 tools: deadbolt_check_supabase_access, deadbolt_catalog_query. Their descriptions and schemas cost roughly 455 tokens of context every time the server is loaded.
Does the Deadbolt MCP server require authentication?
No. We connected to Deadbolt without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Deadbolt MCP server still maintained?
Deadbolt 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.