Universal MCP server for readonly-first access to Oracle Database, Microsoft SQL Server, PostgreSQL, MySQL/MariaDB, SQLite, MongoDB, and Qdrant vector search.
This project is designed for AI tools that support the Model Context Protocol. Projects can install it, provide a YAML config, and expose safe database tools to their AI client.
MCP server for Oracle, MSSQL, PostgreSQL, MySQL, SQLite, MongoDB, and Qdrant vector search access.
0.1.21
Kunci API
MCP_DB_CONFIG
Terakhir diperiksa
2026-11-10
Bintang
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Tool
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Uptime
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Oracle connections use the Node.js oracledb Thin mode by default, so Oracle Instant Client is not required for most databases. Some Oracle databases use NCHAR character sets that Thin mode cannot handle; those databases require Oracle Thick mode with Oracle Client libraries.
By default, commands run from a project directory automatically use:
mcp-db.local.yml, then mcp-db.yml, then mcp-db.yaml
.env
Features
Oracle, MSSQL, PostgreSQL, MySQL/MariaDB, SQLite, MongoDB, and Qdrant connectors
Multiple named connections in one config file
Readonly by default
SQL multi-statement blocking
MongoDB $out and $merge blocking in readonly mode
Row limits and query timeouts
Markdown table output for query results
Schema/table allowlist and denylist
Sensitive field masking
JSONL audit logs
Interactive setup wizard for AI clients and database connections
CLI for setup, init, validation, connection testing, and stdio/HTTP server startup
Docker image (multi-stage Dockerfile, published to GHCR on release)
Install
1. Install the package
Node / TypeScript projects (local install):
npm install --save-dev mcp-db-connect
.NET, Python, or other non-Node projects (global install):
npm install -g mcp-db-connect
2. Run the setup wizard
npx mcp-db-connect setup
The wizard asks which AI clients and databases to configure, then asks for one connection string per database (the same string your DB host, hosting provider, or existing app config already gives you) and writes all config files automatically.
3. Test your connections
npx mcp-db-connect test-connections
That's it — your AI client is now connected to your databases.
What the wizard creates
mcp-db.local.yml # database connection config
.env # local secrets
.gitignore # keeps secrets and local config out of git
.mcp.json # Claude Code MCP config (if selected)
.codex/config.toml # Codex CLI config (if selected)
.gemini/settings.json # Gemini CLI config (if selected)
.kimi/mcp.json # Kimi CLI config (if selected)
SQLite has no host/port/username — file is a path to the database file (relative paths resolve against the process's working directory), and :memory: is also accepted for an ephemeral in-process database.
MongoDB stores the selected port inside the URI saved in .env, for example:
Oracle Instant Client is not required. If the database has NCHAR/NVARCHAR2 columns with NLS_NCHAR_CHARACTERSET = AL16UTF16, the connector automatically rewrites the query to cast those columns to VARCHAR2 server-side so Thin mode can handle them.
Connection strings instead of individual fields
Oracle, MSSQL, PostgreSQL, and MySQL/MariaDB also accept a raw connection string instead of host/port/database/username:
connectionStringEnv points to a full ADO/tedious connection string (MSSQL), a postgres://user:password@host:5432/database URI (PostgreSQL), or a mysql://user:password@host:3306/database URI (MySQL/MariaDB) in .env (same convention as MongoDB's uriEnv). connectDescriptor holds an Oracle TNS connect descriptor or Easy Connect string and is not secret — only the password goes in .env. The setup wizard generates these automatically from a pasted connection string; both forms can also still be hand-written using the structured host/port/... fields shown above.
PostgreSQL and MySQL/MariaDB connections also accept ssl: true (with rejectUnauthorized: false for self-signed certificates common on managed database providers).
Config via environment variable
Every command that loads config (start, serve-http, validate-config, test-connections) also accepts the entire config document — the same security + connections structure normally stored in mcp-db.local.yml — as YAML or JSON in the MCP_DB_CONFIG environment variable, instead of a file:
When MCP_DB_CONFIG is set, --config/mcp-db.local.yml/mcp-db.yml/mcp-db.yaml file discovery is skipped entirely — no file needs to exist. This is what lets container platforms that can't mount a project file into the container (Smithery.ai and similar hosted MCP platforms) run this server: they inject the whole config as one environment variable instead. Secrets can be embedded directly (as password:/connectionString: above) or still indirected through their own env var via passwordEnv/connectionStringEnv/etc. — both forms keep working exactly as they do with a file.
db_describe_table — Describe columns (including catalog comments where available), primary keys, foreign keys, and indexes
db_query — Run a readonly SQL query
db_explain_query — Return an execution plan for a SQL query
db_count — Count rows in a table with an optional WHERE clause
db_query and db_explain_query accept an optional params array for bind parameters. Oracle and PostgreSQL use positional binds (:1, :2, ... for Oracle; $1, $2, ... for PostgreSQL); MySQL/MariaDB and SQLite use ? placeholders in array order; MSSQL has no positional syntax, so params are bound as named parameters @p1, @p2, ... in the same order as the array.
SQLite has no schema/database concept beyond main (plus any attached databases); db_list_schemas reflects that via PRAGMA database_list, and db_explain_query runs EXPLAIN QUERY PLAN rather than a cost-based plan.
db_describe_table includes each column's catalog comment/description when the database has one set (Oracle all_col_comments, PostgreSQL COMMENT ON COLUMN, MySQL/MariaDB COLUMN_COMMENT, MSSQL MS_Description extended property) — the comment column in the output is only shown when at least one column actually has one. SQLite has no comment mechanism, so it's never populated there.
MongoDB
db_list_connections — List configured connections
db_test_connection — Test a connection
db_list_schemas — List databases
db_list_tables — List collections
db_describe_table — Sample collection fields
db_mongo_find — Run a readonly find operation
db_mongo_aggregate — Run a readonly aggregate pipeline
db_mongo_count — Count documents with an optional filter
db_mongo_get_indexes — List indexes for a collection
db_mongo_explain_find — Return an execution plan for a find operation
db_mongo_explain_aggregate — Return an execution plan for an aggregate pipeline
db_mongo_insert — Insert one or more documents
db_mongo_update — Update documents matching a filter (many: true for all matches, otherwise just the first)
db_mongo_delete — Delete documents matching a filter (many: true for all matches, otherwise just the first)
db_mongo_insert/db_mongo_update/db_mongo_delete are blocked unless the connection has mode: readwriteandsecurity.allowWriteOperations: true — mirroring how write SQL statements are gated for the SQL connectors. db_mongo_update and db_mongo_delete also require a non-empty filter, so a mistaken {} can't silently update or delete an entire collection.
db_describe_table infers MongoDB column types by sampling documents. The sample size defaults to 20 and can be set per-connection with describeSampleSize, or overridden per call with the tool's sampleSize argument:
db_mongo_find accepts an optional skip for pagination (skip the first N matching documents, then apply maxRows as the page size).
Qdrant (vector search)
db_list_connections — List configured connections
db_test_connection — Test a connection
db_list_tables — List collections
db_describe_table — Describe a collection's vector config and payload field types
db_qdrant_search — Run a vector similarity search with an optional filter and score threshold
db_qdrant_scroll — Browse or filter points without a vector search
db_qdrant_count — Count points with an optional filter
db_list_schemas returns an empty list for Qdrant connections since Qdrant collections aren't grouped into schemas/databases.
db_qdrant_scroll supports paging through an entire collection: each response includes a Next offset line when more points remain — pass that value back as the offset argument on the next call to continue. Omit offset to start from the beginning.
Query result tools return tables like:
Rows: 2
| id | name |
| --- | --- |
| 1 | Alice |
| 2 | Bob |
start and serve-http check npm once a day (cached, non-blocking, silently skipped if offline) for a newer version and print a notice to stderr if one is available — this never touches stdout, so it's safe on the stdio transport. The check only looks within ^<your current version>, i.e. the current 0.x minor line (for example, 0.1.21 only considers 0.1.22, 0.1.23, ... — never 0.2.0). This project hasn't reached 1.0.0 yet, so a minor version bump could still contain breaking changes; the narrower range avoids silently jumping into one.
Run the update yourself with:
mcp-db-connect update # checks and installs, if available
mcp-db-connect update --check-only # only checks, doesn't install
mcp-db-connect update --range "^0.2.0" # override the range, e.g. to opt into a new minor line deliberately
It detects whether the package is installed globally or as a local project dependency and runs the matching npm install command. There is no fully silent background auto-install — updating always requires this one explicit command (or your own npm install -g mcp-db-connect@latest / npm install --save-dev mcp-db-connect@latest).
Docker
A multi-stage Dockerfile at the repo root builds the CLI into a standalone image. The container needs your project's mcp-db.local.yml and .env mounted in, since connection config is file-based rather than baked into the image.
Pull the published image (built and pushed to GHCR on every release by .github/workflows/release.yml):
Run over stdio (for MCP clients that exec the container directly), mounting your project config. Replace mcp-db-connect with ghcr.io/phatngoit/mcp-db-connect:latest to use the published image instead of a local build:
Or use the examples/docker-compose.server.yml example, which builds the image and mounts mcp-db.local.yml/.env from the current directory:
docker compose -f examples/docker-compose.server.yml up --build
Hosting on a cloud/container platform
No file mount is required if you set MCP_DB_CONFIG instead (see Config via environment variable). The image's entrypoint (docker-entrypoint.sh) also auto-switches from stdio to the Streamable HTTP transport when a PORT environment variable is present — the convention used by Smithery.ai, Railway, Render, Fly.io, and similar platforms — binding to 0.0.0.0:$PORT without any command override:
SQL write and DDL keywords are blocked unless global and connection config allow writes
SQL multi-statement execution is blocked
MongoDB aggregate write stages and db_mongo_insert/db_mongo_update/db_mongo_delete are blocked unless global and connection config allow writes
db_mongo_update/db_mongo_delete require a non-empty filter, so they can't accidentally affect an entire collection
Result rows are capped by config
Sensitive fields are masked recursively
Use database accounts with the smallest permissions possible. The MCP layer is a guardrail, not a replacement for DB-level permissions.
Registries
Official MCP Registry — listed as io.github.phatngoit/mcp-db-connect via server.json at the repo root. The release workflow (.github/workflows/release.yml) publishes to this registry automatically after every npm release using GitHub Actions OIDC (no stored token needed).
Glama.ai — indexed by crawling this repository; submitted manually, no manifest file required.
Smithery.ai — not yet submitted. The blockers are resolved: a Dockerfile (published to ghcr.io/phatngoit/mcp-db-connect), a smithery.yaml container-runtime manifest at the repo root, MCP_DB_CONFIG env-var config (no file mount needed), and a PORT-aware entrypoint that switches to the HTTP transport automatically. Submitting still requires a one-time manual step — connecting this repo through Smithery's GitHub App at smithery.ai/new — and smithery.yaml's exact fields should be double-checked against Smithery's current docs first, since they weren't independently verifiable while writing it.
Belum ada daftar tool. Server remote mendapatkannya setelah pemeriksaan kesehatan pertama.
FAQ
Pertanyaan
Bagaimana cara menginstal MCP DB Connect?
Salin konfigurasi stdio untuk Cursor, Claude Desktop, Claude Code, atau VS Code di halaman ini. Konfigurasi ini memakai instalasi dari penerbit, bukan proxy PlugMCP.
Apakah MCP DB Connect memerlukan kunci API?
Penerbit mencantumkan variabel lingkungan berikut: MCP_DB_CONFIG.
Transport apa yang digunakan MCP DB Connect?
MCP DB Connect berjalan secara lokal melalui stdio.
Kapan MCP DB Connect terakhir diperiksa?
Terakhir diperiksa 2026-11-10. MCP server for Oracle, MSSQL, PostgreSQL, MySQL, SQLite, MongoDB, and Qdrant vector search access.