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For a practical Docker walkthrough, this guide uses the askdba MySQL MCP server, which accepts a MySQL connection string through MYSQL_DSN and documents both a prebuilt image and Docker Compose. A “MySQL MCP server” is a category, not one standard image or configuration: other implementations use different variables, commands, and transports.
You can point the server at an existing MySQL database or run MySQL beside it in the same Compose project. Choose the connection hostname based on where MySQL runs; localhost inside the MCP container means that container, not your computer or another service.
Prerequisites and the deployment choice
You need Docker with Docker Compose support if you want to run both services together, a MySQL database the container can reach, and an MCP client that supports the transport you choose. The examples below follow askdba’s README; repository instructions and image tags can change, so check that project’s current README before using them. These are documented examples, not commands tested against your particular Docker host or client.
- Existing database: Run only the MCP container and point its DSN to the database’s reachable hostname and port.
- MySQL in this Compose project: Define MySQL and the MCP server as services, and use the MySQL service name as the database hostname.
- Local MCP client using stdio: The client launches Docker as a child process and communicates over standard input and output. Keep stdin attached with Docker’s
-ioption. - Network client: Use an implementation that documents an HTTP transport, then configure and secure that service according to its own documentation. Do not assume askdba’s stdio setup is an HTTP server.
Docker’s MCP Toolkit overview describes Docker’s general MCP tooling. It does not establish that a particular MySQL server implementation is available in its catalog.
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Choose the right MySQL hostname
MySQL in the same Compose project
Use the Compose service name, such as mysql, in the DSN. Compose provides service-name DNS between services on the project network, so the MCP container connects to mysql:3306, not to its own localhost. The askdba Compose example uses this topology.
MySQL running on the Docker host
A container’s localhost points back to itself. Use a host address reachable from inside the container; project examples use host.docker.internal. Platform behavior matters: the neverinfamous project specifically calls out additional host-gateway configuration on Linux. Check the current Docker and project instructions for your operating system rather than assuming the hostname resolves everywhere.
MySQL on another machine or Docker network
Use the database’s routable DNS name or address and make sure firewall rules, routing, and MySQL’s own network configuration allow the container to connect. A correct DSN cannot compensate for a blocked port or a hostname that is only resolvable from your laptop.
Run askdba with its prebuilt Docker image
The askdba README shows a prebuilt image configured with MYSQL_DSN. Its stdio example uses -i --rm, a pattern for a local MCP client that starts the container as a subprocess. Replace the example credentials and hostname with values for your database; do not publish real secrets in a shared configuration.
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-e MYSQL_DSN='mysql://DB_USER:DB_PASSWORD@host.docker.internal:3306/DB_NAME'
askdba/mysql-mcp-server:latestThe exact image name and command are project-specific. The README example uses the floating latest tag, which can change over time. For reproducible deployment, use a version tag only after verifying that the project currently publishes it and that it is the version you intend to run.
Configure a stdio client
In your MCP client’s server configuration, have it launch Docker with the same image and environment value. The exact configuration file and field names vary by client; use that client’s documented stdio schema. The essential behavior is that the client starts the command, keeps stdin attached, and exchanges MCP messages through the process’s standard streams.
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docker run -i --rm
-e MYSQL_DSN='mysql://DB_USER:DB_PASSWORD@host.docker.internal:3306/DB_NAME'
askdba/mysql-mcp-server:latestDo not paste this shell snippet blindly into every client: some clients expect an executable plus separate argument and environment fields rather than a shell command. Preserve the -i behavior and follow the client’s own configuration format.
Run MySQL and the MCP server with Docker Compose
If you want Compose to manage both services, the askdba README demonstrates a MySQL service and an MCP service connected by service name. This illustrative configuration follows that topology; fill in credentials and image versions that you have verified for your environment.
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mysql:
image: mysql:8.0
environment:
MYSQL_ROOT_PASSWORD: change-this-root-password
MYSQL_DATABASE: appdb
MYSQL_USER: mcp_user
MYSQL_PASSWORD: change-this-user-password
volumes:
- mysql_data:/var/lib/mysql
mysql-mcp:
image: askdba/mysql-mcp-server:latest
environment:
MYSQL_DSN: mysql://mcp_user:change-this-user-password@mysql:3306/appdb
depends_on:
- mysql
volumes:
mysql_data:The important connection detail is @mysql:3306: mysql is the Compose service name. The named volume keeps database files outside the disposable container’s writable layer. depends_on expresses startup ordering; it should not be treated as proof that MySQL is ready to accept connections before the MCP server tries to connect.
- Save the configuration as
compose.yamlin an otherwise empty project directory. - Replace example passwords and select image versions after checking the current project instructions.
- Start the services with
docker compose up -d. - Inspect startup output with
docker compose logs -f mysql mysql-mcp. Check the MySQL logs for initialization or authentication errors and the MCP logs for connection failures. - When finished, stop the services with
docker compose down. This keeps the named volume. To remove the stored database as well,docker compose down -vdeletes the project’s volumes; use that only if you intend to discard the data.
The example is a starting point, not a production security template. In particular, use credentials and database grants suited to the operations you permit, and keep secrets out of committed files where possible.
Set database permissions deliberately
An MCP server’s available database operations are implementation-specific. A sample account named readonly in another project is not evidence that every MySQL MCP server restricts itself to read-only SQL. Do not assume the server enforces a permission boundary unless the implementation documents that behavior.
- Create a dedicated MySQL identity for the MCP connection instead of reusing an administrator account.
- Grant only the database privileges required for the tools and tasks you intend to allow. If read-only access is sufficient, enforce that through MySQL grants rather than relying on a username or prompt.
- Keep credentials out of source control and shared client configurations. Use your deployment’s supported secret mechanism where available.
- Review the server’s current documentation for query restrictions, logging, and credential handling before connecting sensitive data.
Futuretea’s README says its password is never logged or returned, but that statement applies to that project and should not be generalized to askdba or other implementations.
Verify the client-to-server connection
For a stdio setup, start the server through the MCP client and use the client’s documented connection or tool-discovery view to confirm it can initialize the server. Then try a low-risk operation supported by that implementation. Do not treat a running container alone as proof of a successful MCP handshake or database query.
For a network deployment, configure the client with the implementation’s documented URL and transport, and verify reachability from the client’s network. The futuretea project documents a curl health check for its HTTP example; use its current README for the exact request rather than applying it to askdba or another server.
HTTP alternatives and how implementations differ
There is no universal MySQL MCP Docker interface. Select one implementation and use its command, environment variables, transport, and client setup consistently; do not splice together examples from different repositories.
| Implementation | Documented interface | Transport and topology notes |
|---|---|---|
| askdba | MYSQL_DSN connection string |
README shows a prebuilt image, stdio-oriented Docker invocation, and Compose with MySQL and MCP services. |
| futuretea | Separate MYSQL_MCP_* variables, including host, database port, username, password, and database |
README documents stdio and HTTP-related modes, including Streamable HTTP and SSE; it lists /healthz, /mcp, /sse, and /message. |
| neverinfamous | A distinct image and CLI interface with explicit transport flags | Its README includes host/container/remote networking examples and calls out extra Linux host-gateway configuration for host access. |
These are documentation-level distinctions, not a tested performance or feature benchmark. Project branches, image tags, endpoint behavior, and client configuration can change, so verify the implementation’s current instructions before deployment.
Futuretea-specific Docker examples
For futuretea, the documented stdio invocation uses its own variable names. This example is specific to that project; it is not interchangeable with askdba’s MYSQL_DSN command.
docker run -i --rm
-e MYSQL_MCP_HOST=host.docker.internal
-e MYSQL_MCP_DB_PORT=3306
-e MYSQL_MCP_USERNAME=readonly
-e MYSQL_MCP_PASSWORD=replace-me
-e MYSQL_MCP_DATABASE=appdb
futuretea/mysql-mcp-server:latestFuturetea’s README also documents HTTP invocation with a published port and --port 8080 --listen 0.0.0.0. Consult its current README for the complete command and client URL, because the transport and endpoint are implementation-specific.
Secure an HTTP MCP server before exposing it
Futuretea’s project documentation explicitly warns that its HTTP/SSE modes have no built-in authentication or TLS. It recommends restricting use to trusted networks or putting a suitably configured reverse proxy in front when exposing a port. This warning is about futuretea’s documented modes, not a claim about every MySQL MCP server.
- A published Docker port can make a service reachable beyond the container; publish only the interfaces and networks you intend.
- Do not expose an unauthenticated MCP endpoint to an untrusted network. Apply access controls and TLS at an appropriate layer before broader exposure.
- Check the selected implementation’s actual HTTP authentication, TLS, and authorization features rather than assuming they match another project.
- Use database-level least privilege as an independent limit on what a compromised or misused MCP connection can do.
Troubleshooting common connection failures
“Connection refused” or a timeout
Check that MySQL is running, listening on the expected port, and reachable from the MCP container. If both are in Compose, use the database service name and internal port. If MySQL is on the host, confirm the host address resolves inside the container; Linux may need the host-gateway setup described by the relevant project and Docker guidance.
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Check spelling and topology. A Compose service name resolves only on the appropriate Compose network. localhost inside the MCP container is not the MySQL service or Docker host.
Access denied
Verify the username, password, database name, and MySQL grants. Ensure the account is permitted to connect from the container’s source address. URL-encode reserved characters in credentials if the DSN parser treats them as delimiters.
Server starts but the MCP client cannot initialize it
Confirm the chosen client supports the server’s transport and that its configuration uses the right stdio or HTTP fields. For stdio launched through Docker, keep stdin attached with -i and avoid commands that redirect MCP protocol output. For HTTP, use the URL and endpoint documented by that implementation.
Compose starts the MCP container before MySQL is usable
depends_on controls dependency ordering but does not by itself guarantee database readiness. Review both services’ logs and use the selected project’s documented retry or readiness approach if the MCP process attempts a connection too early.
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Cost, reliability, and versioning considerations
The examples here do not establish a benchmark, uptime level, or guaranteed connection behavior. Your reliability depends on the chosen implementation, its release, the database’s availability, container networking, and how the MCP client starts or reaches the server.
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- Prefer a verified version tag over
latestwhen you need repeatable deployments; confirm available tags in the project’s current release information. - Keep database persistence and backup strategy separate from the MCP container lifecycle. In the Compose example, deleting the named volume deletes its stored database.
- Watch container logs and database logs when diagnosing failures, and validate a low-risk request in your own client before connecting important workloads.
- Consider whether a local stdio process or network-accessible service better fits your client and security boundary; they solve different deployment problems.
Frequently Asked Questions
Is there one official MySQL MCP server Docker image?
No. MySQL MCP server refers to multiple independent implementations with different images, configuration variables, and transport support.
Can a Dockerized MySQL MCP server connect to a database on another machine?
Yes, if the container can resolve and reach the database host and the network and MySQL permissions allow the connection.
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