# Deadbolt (remote · deadbolt.clawhard.com)

Check Supabase SQL for who can read and write each table: RLS gaps, open policies, grants, fix SQL.

- Trust score: 68/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-04

## Components

- remote · `deadbolt.clawhard.com`: 68/100 (this document), [markdown](https://verifymcp.io/servers/com-clawhard-deadbolt/deadbolt.md), [page](https://verifymcp.io/servers/com-clawhard-deadbolt/deadbolt)

## Channel facts

- Endpoint: `https://deadbolt.clawhard.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## 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 2026-11-04.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS check failed: the endpoint is reachable over plaintext HTTP.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - 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**: 79/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - 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.
  - 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**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% 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 2 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.
  - Supports UI / widget rendering.

## Install

### 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.

### Claude

```bash
claude mcp add --transport http com-clawhard-deadbolt 'https://deadbolt.clawhard.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-clawhard-deadbolt": {
      "url": "https://deadbolt.clawhard.com/mcp"
    }
  }
}
```

### VS Code

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

### Codex

```toml
[mcp_servers.com-clawhard-deadbolt]
url = "https://deadbolt.clawhard.com/mcp"
```

### opencode

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

### OpenClaw

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

### Hermes

```yaml
mcp_servers:
  com-clawhard-deadbolt:
    url: "https://deadbolt.clawhard.com/mcp"
```

### Netclaw

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

### Vellum

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

### Other

```json
{
  "mcpServers": {
    "com-clawhard-deadbolt": {
      "type": "http",
      "url": "https://deadbolt.clawhard.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.

### 2026-11-04 (score 68, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-11-03 (score 67)

First indexed and scored.

## MCP tools (2)

### `deadbolt_check_supabase_access` (~360 tokens)

Check who can read and write Supabase tables (RLS, policies, grants)

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.

Input parameters:

- `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, required): Migration SQL (one or many files concatenated, in order), or the single JSON value returned by the catalog query.

### `deadbolt_catalog_query` (~95 tokens)

Get the read-only SQL that snapshots a live Supabase database for Deadbolt

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.

## Diagnostics

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

## Score history

- 2026-11-04: 68
- 2026-11-03: 67

## Common questions

### 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.

## Links

- Remote endpoint: https://deadbolt.clawhard.com/mcp
- Website: https://deadbolt.clawhard.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-clawhard-deadbolt/deadbolt.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-clawhard-deadbolt/deadbolt.json
- HTML version of this page: https://verifymcp.io/servers/com-clawhard-deadbolt/deadbolt