alloydb vs SQL Preview
alloydb is a plugin bundle for AI coding tools published by gemini-cli-extensions. Marketplaces we read that list it: 3 (Claude Code: claude-plugins-official, Claude Code: claude-plugins-community, Community GitHub marketplaces). SQL Preview is an MCP server published by fadnavismehul. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-12. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  alloydb | |
|---|---|---|
| Claude Code: claude-plugins-official | Listed Version: 0.2.0 Forks (GitHub): 6 Stars (GitHub): 24 Not marked · First seen |
Not listed |
| Claude Code: claude-plugins-community | Listed Version: 0.2.0 Forks (GitHub): 6 Stars (GitHub): 24 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.6.28 No figure published Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | alloydb | SQL Preview |
|---|---|---|
| Marketplaces that list it (differs) | 3 (better) | 1 (worse) |
| Stars (GitHub) (differs) | 42 | No figure on GitHub |
| Forks (GitHub) (differs) | 7 | No figure on GitHub |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (@toolbox-sdk/server) | On your machine (sql-preview) |
| Transport (differs) | Not stated | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | 8, secrets among them: 1 | 3, secrets among them: 1 |
| Parts of the bundle (differs) | 8 | Not a bundle |
| Licence (differs) | Apache-2.0 | Not stated |
| Repository (differs) | github.com/gemini-cli-extensions/alloydb | github.com/fadnavismehul/sql-preview |
| Changes in the last 7 days (differs) | 7 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
alloydb
Create, connect, and interact with an AlloyDB for PostgreSQL database and data.
SQL Preview
Run governed SQL queries and inspect database schemas from MCP agents.
How to run each
alloydb As a Claude Code plugin
/plugin install alloydb@claude-plugins-officialSQL Preview As a local MCP server: npm package
claude mcp add --env "SQL_PREVIEW_CONNECTIONS=<YOUR_SQL_PREVIEW_CONNECTIONS>" --transport stdio sql-preview -- npx -y sql-previewRequires: SQL_PREVIEW_CONNECTIONS (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Only alloydb asks for
ALLOYDB_POSTGRES_CLUSTERALLOYDB_POSTGRES_DATABASEALLOYDB_POSTGRES_INSTANCEALLOYDB_POSTGRES_IP_TYPEALLOYDB_POSTGRES_PASSWORD (secret)ALLOYDB_POSTGRES_PROJECTALLOYDB_POSTGRES_REGIONALLOYDB_POSTGRES_USERCLOUD_SQL_MSSQL_DATABASECLOUD_SQL_MSSQL_INSTANCECLOUD_SQL_MSSQL_IP_TYPECLOUD_SQL_MSSQL_PASSWORD (secret)
Show the remaining 31
CLOUD_SQL_MSSQL_PROJECTCLOUD_SQL_MSSQL_REGIONCLOUD_SQL_MSSQL_USERCLOUD_SQL_MYSQL_DATABASECLOUD_SQL_MYSQL_INSTANCECLOUD_SQL_MYSQL_IP_TYPECLOUD_SQL_MYSQL_PASSWORD (secret)CLOUD_SQL_MYSQL_PROJECTCLOUD_SQL_MYSQL_REGIONCLOUD_SQL_MYSQL_USERCLOUD_SQL_POSTGRES_DATABASECLOUD_SQL_POSTGRES_INSTANCECLOUD_SQL_POSTGRES_IP_TYPECLOUD_SQL_POSTGRES_PASSWORD (secret)CLOUD_SQL_POSTGRES_PROJECTCLOUD_SQL_POSTGRES_REGIONCLOUD_SQL_POSTGRES_USERDATAPLEX_PROJECTDATAPROC_PROJECTDATAPROC_REGIONFIRESTORE_DATABASEFIRESTORE_PROJECTORACLE_CONNECTION_STRINGORACLE_PASSWORD (secret)ORACLE_USERNAMEORACLE_USE_OCIORACLE_WALLETSPANNER_DATABASESPANNER_DIALECTSPANNER_INSTANCESPANNER_PROJECT
Only SQL Preview asks for
SQL_PREVIEW_CONNECTIONS (secret)SQL_PREVIEW_MAX_ROWSSQL_PREVIEW_MCP_SAFE_MODE
Settings as each marketplace publishes them. Asking for fewer is not better in itself.
What it can do: alloydb · What it can do: SQL Preview · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-official/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.