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Let coding agents query any SQL database safely. Read-only by default and scoped by your policies.
50FairInstall
~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"valv-dev-mcp": {
"command": "npx",
"args": [
"-y",
"@valv/mcp@0.6.2"
],
"env": {
"DATABASE_URL": "YOUR_DATABASE_URL",
"VALV_PROVIDER": "",
"VALV_DATABASE": "",
"VALV_TABLES": "",
"VALV_EXCLUDE": "",
"VALV_POLICY_FILE": "",
"VALV_CONTEXT": "",
"VALV_HTTP_PORT": ""
}
}
}
}
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Environment
| Name | Required | Notes |
|---|
| DATABASE_URL | Yes | Database connection string. PostgreSQL, MySQL, SQLite, CockroachDB, or a ClickHouse HTTP URL. Secret. |
| VALV_PROVIDER | No | Datasource provider: postgresql, mysql, sqlite, or clickhouse. Inferred from DATABASE_URL when omitted. |
| VALV_DATABASE | No | Database name. Required for ClickHouse, whose URL does not carry one. |
| VALV_TABLES | No | Comma-separated allow-list of tables. When set, only these are exposed to the agent. |
| VALV_EXCLUDE | No | Comma-separated deny-list of tables, applied after the allow-list. |
| VALV_POLICY_FILE | No | Path to a policy module that takes full control of access. Without it, the server is read-only across all tables. |
| VALV_CONTEXT | No | JSON context object the policy reads, e.g. {"tenant":{"id":"acme"}}. |
| VALV_HTTP_PORT | No | Serve over Streamable HTTP on this port instead of stdio. |
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About
Let coding agents query any SQL database safely. Read-only by default and scoped by your policies.
FAQ
- What is valv?
- Let coding agents query any SQL database safely. Read-only by default and scoped by your policies.
- How do I install valv?
- Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.
- Is valv official?
- No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.
- How is the trust score calculated?
- This listing scores 50 (Fair). The formula is published on the methodology page.
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