# execute_psql

Direct PostgreSQL access

Agent View of the PolicyLayer registry record for `execute_psql`. HTML page: https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/execute-psql

## Facts

- Tool: `execute_psql`
- Server: Supabase MCP Server - Self-Hosted Edition (`abdqum/supabase-mcp-selfhosted`) — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted.md
- Homepage: https://github.com/abdqum/Supabase-MCP-SelfHosted
- Risk category: Execute (High risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "execute_psql",
    "arguments": {}
  }
}
```

## Why execute_psql is rated High

This tool provides direct access to execute arbitrary PostgreSQL queries and commands. While it could theoretically be used for Read operations, the capability to execute arbitrary SQL means it can also perform Write, Execute (procedural operations), and Destructive actions (DROP TABLE, DELETE, etc.).

From the tool's own definition: "Tool name 'execute_psql' combined with description 'Direct PostgreSQL access' indicates execution of arbitrary PostgreSQL commands without apparent restrictions or guardrails."

## Use case

AI agents invoke execute_psql to trigger actions in Supabase MCP Server - Self-Hosted Edition. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Supabase MCP Server - Self-Hosted Edition:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "execute_psql": {
      "limits": [
        {
          "counter": "execute_psql_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Supabase MCP Server - Self-Hosted Edition (56)

- `delete_auth_user` — Destructive — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/delete-auth-user.md
- `delete_subscription` — Destructive — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/delete-subscription.md
- `apply_migration` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/apply-migration.md
- `auto_create_indexes` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/auto-create-indexes.md
- `auto_migrate` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/auto-migrate.md
- `execute_sql` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/execute-sql.md
- `manage_docker` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/manage-docker.md
- `manage_functions` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/manage-functions.md
- `manage_triggers` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/manage-triggers.md
- `push_migrations` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/push-migrations.md
- `realtime_management` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/realtime-management.md
- `rebuild_hooks` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/rebuild-hooks.md
- `smart_migration` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/smart-migration.md
- `sync_schema` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/sync-schema.md
- `vacuum_analyze` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/vacuum-analyze.md
- `validate_migration` — Execute — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/validate-migration.md
- `hello` — Other — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/hello.md
- `analyze_performance` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/analyze-performance.md
- `analyze_rls_coverage` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/analyze-rls-coverage.md
- `audit_security` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/audit-security.md
- `check_health` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/check-health.md
- `generate_typescript_types` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/generate-typescript-types.md
- `get_anon_key` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-anon-key.md
- `get_auth_user` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-auth-user.md
- `get_database_connections` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-database-connections.md
- `get_database_stats` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-database-stats.md
- `get_logs` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-logs.md
- `get_project_url` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-project-url.md
- `get_service_key` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/get-service-key.md
- `inspect_schema` — Read — https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted/inspect-schema.md
- …and 26 more: https://policylayer.com/tools/abdqum-supabase-mcp-selfhosted.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=abdqum-supabase-mcp-selfhosted · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/abdqum-supabase-mcp-selfhosted