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MySQL Legacy MCP

io.github.Rufflet/mysql-legacy-mcpv0.2.1Databases

Inspect and query MySQL 5.0–5.6; opt-in INSERT/UPDATE/DELETE/DDL. Live-verified 5.0–8.0.

The current version, v0.2.1, was published to the official MCP registry on 2026-09-14. It is distributed as mysql-legacy-mcp on npm, filed under Databases by this index, and declares 16 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.

In-path gate · all MCP tools

Using MySQL Legacy MCP in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

uv tool install mcpindex-gate && mcpindex-config-wire
Auditable install path →Watch it hold a drift →
Trust verdict · v1 advisory · method
NOT YET SCREENEDno verdict on file

Verdict not yet evaluated for this tool. The semantic screen takes adversarial cases first; coverage rolls out as the corpus expands (15/150 labels to graduation). The deterministic conformance probe is built but has not yet run on the public corpus, so a recorded verdict here is REVIEW or UNVERIFIED, never a clearing ALLOW. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: the eval, four-state verdict, honest limits.

Own this server? Screen its description →

That verdict was true at screening time (snapshot 2026-09-14).

Contracts can change after screening, with no version bump. The gate pins MySQL Legacy MCP’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.

See your first HOLD in 2 minutes →

Related: how to trust an MCP server · screen before install · silent contract drift

Environment variables
MYSQL_LEGACY_HOST
required

Database host or local tunnel endpoint

MYSQL_LEGACY_USER
required

Dedicated database reader account

MYSQL_LEGACY_PASSWORD
requiredsecret

Nonempty database account password

MYSQL_LEGACY_PORT

TCP port, 1–65535

MYSQL_LEGACY_DATABASE

Optional default database

MYSQL_LEGACY_HIDE_SYSTEM_DATABASES

Hide mysql and information_schema from listings

MYSQL_LEGACY_QUERY_TIMEOUT

Driver query timeout, 100–60000 milliseconds

MYSQL_LEGACY_MAX_ROWS

SELECT response row limit, 1–1000

MYSQL_LEGACY_MAX_RESULT_BYTES

SELECT row-data JSON byte limit, 1024–1048576

MYSQL_LEGACY_CONNECT_TIMEOUT

Connection-establishment timeout, 100–60000 milliseconds

MYSQL_LEGACY_POOL_SIZE

Pooled connection limit, 1–50

MYSQL_LEGACY_ALLOW_INSERT

Enable the mysql_legacy_insert tool

MYSQL_LEGACY_ALLOW_UPDATE

Enable the mysql_legacy_update tool (WHERE clause always required)

MYSQL_LEGACY_ALLOW_DELETE

Enable the mysql_legacy_delete tool (WHERE clause always required)

MYSQL_LEGACY_ALLOW_DDL

Enable the mysql_legacy_ddl tool (table-level statements only)

MYSQL_LEGACY_DISABLE_READ_ONLY_TRANSACTIONS

Disable the read-only transaction wrap around mysql_legacy_select on MySQL 5.6.5+

MCP quality score · maturity, not trust · methodology
freshness
25
completeness
20
installability
25
documentation
15
stability
5
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