grpc-mcp-gateway

Name: grpc-mcp-gateway Review
Item: grpc-mcp-gateway
Rating: 3.0
Author: Aaron Matthews

Connector Development Usable

Works inClaude Code Claude Cowork Claude Chat

Usable Scanned — metadata only

Enables teams to expose existing gRPC services as MCP servers without rewriting infrastructure, reducing integration friction and accelerating adoption of AI…

protoc plugin and runtime that generates spec-compliant MCP servers from protobuf definitions — every unary RPC becomes an MCP tool with a JSON Schema derived from the request message, and prompts, resources, and elicitation are added via proto annotations. Generates Go, Python, Rust, and C++ code and supports stdio, SSE, and streamable-http transports.

Proxy internal gRPC services to Claude for real-time data access
Connect Claude to existing gRPC-based backend infrastructure
Enable MCP clients to call gRPC APIs through standard MCP protocol

9 starsApache-2.0 (commercial OK)FreeNo code needed

Usable rating — This tool is functional but has notable gaps. Review the evaluation notes below before deploying.

Why it matters

Enables teams to expose existing gRPC services as MCP servers without rewriting infrastructure, reducing integration friction and accelerating adoption of AI-assisted development workflows.

Best for

Teams maintaining gRPC microservices who want to integrate Claude tools without duplicating APIs.

Works in

Claude Code Claude Cowork Claude Chat

Source

https://github.com/the-protobuf-project/grpc-mcp-gateway

By machanirobotics

How to Get It

Option 1: Claude Desktop AppOpen the Customize panel in the sidebar → browse connectors → search and add. Works in Claude Code, Claude Cowork, and Claude Chat.

Option 2: Paste into Claude CodeCopy the command below and paste it into a Claude Code conversation. Claude will run it for you.

Command

go install github.com/the-protobuf-project/grpc-mcp-gateway/plugin/cmd/protoc-gen-mcp@latest

Tip: Paste this into a Claude Code conversation. Verify command matches your Claude Code version.

First thing to try

Once it’s connected, paste this into Claude:

Help me proxy internal gRPC services to Claude for real-time data access

PrerequisitesGo 1.25+ (for the protoc-gen-mcp plugin); buf or protoc toolchain; existing .proto service definitionsCostFree

Trust Signals Auto-scanned

Stars9Contributors11Last updated2026-08-18LicenseApache-2.0 (OK for commercial use)Known CVEsNone foundSources: GitHub Advisory Database + OSV.dev · Scanned 2026-08-18 · scanner v1

Data & Access

Data processingPrompts sent to Anthropic API. Enterprise/Team plans exclude training.

Community Pulse Growing

Discussed on Reddit

gRPC MCP Gateway — Reddit · 3 pts

1 mentions across 1 sources

Reviewer notes

Auto-scanned review. These are observations, not a security certification.

Auto-assessment from April sweep — baseline scores pending hands-on review.

2026-04-18: Approved in April sweep: New and small but has a clear description and recent commits — worth tracking.

Things to check

Requires gRPC service definitions and proper gateway configuration; streaming and complex proto types may need custom handling. Introduces an additional proxy layer affecting latency and operational complexity.

How to evaluate tools before deploying →

Data shown here comes from public APIs and automated scanning. Reviewer notes reflect one person's experience. This is not a security certification or legal recommendation. Always evaluate tools according to your own organization's policies.

Evaluation Scores

Evaluation

Ease of Use

3/5

Versatility

3/5

Reliability

3/5

Security

3/5

Overall score3.00 / 5.00 UsableEvaluatedApr 2026

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