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grpcmcp
A simple MCP server that will proxy to a grpc backend based on a provided descriptors file or using reflection.
Quick Start
- Install the binary:
go install .
orgo install github.com/adiom-data/grpcmcp
Ensure the go bin directory is in your PATH. - In a terminal, run the example grpc server
go run example/main.go
. This will start a grpc health service on port 8090 with server reflection enabled. Note that this runs on the default port that grpcmcp will connect to. - SSE Transport In another terminal, run
grpcmcp --hostport=localhost:3000 --reflect
. Specifyinghostport
will use SSE. The SSE endpoint will be served athttp://localhost:3000/sse
. - STDIN Transport Set up the MCP config. e.g.
Options / Features
grpcmcp --help
for a full list of options.
hostport
string - When set, use SSE, and this serves as the server host:port.descriptors
string - Specify file location of the protobuf definitions generated frombuf build -o protos.pb
orprotoc --descriptor_set_out=protos.pb
instead of using gRPC reflection.reflect
- If set, use reflection to retrieve gRPC endpoints instead of descriptor file.url
string - Specify the url of the backend server.services
string - Comma separated list of fully qualified gRPC service names to filter.bearer
string - Token to attach in anAuthorization: Bearer
header.bearer-env
string - Environment variable for token to attach in anAuthorization: Bearer
header. Overridesbearer
.header
string (repeatable) - Headers to add inKey: Value
format.
Help
Join our Discord at https://discord.gg/hDjx3DehwG
This server cannot be installed
remote-capable server
The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.
MCP server that will proxy to your gRPC backends via reflection or descriptors file.
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