Pre-action risk gate: AI agents call before any irreversible action (money, SQL, delete).
Blackwall MCP server is a locally run integration for AI assistants that speak the Model Context Protocol. Pre-action risk gate: AI agents call before any irreversible action (money, SQL, delete).
Works in any MCP host: Claude Desktop, Claude Code, Cursor, Windsurf, and any agent framework with MCP support.
Once Blackwall is connected, these are the calls the assistant has available:
Cursor — Settings → MCP → Add new global MCP server, then in mcp.json:Example — The Example tool exposed by this serverblackwall-mcp on npm is all you need. Most clients run it directly, so configuration is a few lines and a restart.
You will need 3 environment variables: BLACKWALL_API_KEY, BLACKWALL_MODE, BLACKWALL_BASE_URL. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
Among the database access options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Blackwall's toolset — Cursor, Example — is a fair guide to whether it matches your workflow. It is maintained by com.blackwalltier; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| Cursor | Settings → MCP → Add new global MCP server, then in mcp.json: |
| Example | The Example tool exposed by this server. |
{
"mcpServers": {
"blackwall": {
"command": "npx",
"args": ["-y", "blackwall-mcp"],
"env": { "BLACKWALL_API_KEY": "bw_live_your_key_here" }
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| BLACKWALL_API_KEY | Credential the server authenticates with. | Yes |
| BLACKWALL_MODE | Configuration value read at startup. | Optional |
| BLACKWALL_BASE_URL | Endpoint or connection string the server talks to. | Yes |
Read-only SQL access to Postgres — let your assistant inspect schemas and answer questions from real data.
Manage your whole Supabase project in conversation — database, auth, storage, Edge Functions and branches.
Query, modify and analyse local SQLite databases in conversation — the fastest way to chat with a data file.
Metabase ships its own MCP endpoint — search your BI content, build and run queries, and save questions and dashboards without leaving the chat.
Official MongoDB server covering data, schemas and Atlas management — from find queries to spinning up clusters.
Serverless Postgres with database branching — point your assistant at Neon and let it work on disposable copies.