What is streamnative-mcp-server CLAUDE.md?

Repository instructions for StreamNative's MCP server, a program that lets AI agents communicate with Apache Kafka, Apache Pulsar, and StreamNative Cloud. They describe how to build, test, package, and understand the server.

Building Docker images, running race-detection tests, checking licenses, and tracing requests through the server.

They give the agent the project context and correct commands, reducing guesswork when changing the code.

How streamnative/streamnative-mcp-server configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to streamnative/streamnative-mcp-server. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/streamnative/streamnative-mcp-server/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/streamnative/streamnative-mcp-server

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/streamnative/streamnative-mcp-server/claude-md/github.svg)](https://agentmods.dev/instructions/streamnative/streamnative-mcp-server/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/streamnative/streamnative-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/streamnative/streamnative-mcp-server/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/streamnative/streamnative-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/streamnative/streamnative-mcp-server/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,639 This file is loaded in full into every session.

When invoked 2,639 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.02639	$0.02639
Opus 5.5	$0.01056	$0.01056
Sonnet 5.5	$0.00528	$0.00528
Haiku 4.5	$0.00264	$0.00264

Measured 2mo ago against content hash dc6cf6d6dbc9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

streamnative-mcp-server CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 248 lines

How it starts

The opening of the file, as written. The whole thing — 248 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Build Commands

make build                  # Build server binary to bin/snmcp
make docker-build           # Build local Docker image (both streamnative/mcp-server and streamnative/snmcp tags)
make docker-build-push      # Build and push multi-platform image (linux/amd64,linux/arm64)
make docker-build-multiplatform  # Build multi-platform image locally
make docker-buildx-setup    # Setup Docker buildx for multi-platform builds
make license-check          # Check license headers
make license-fix            # Fix license headers
go test -race ./...         # Run all tests with race detection
go test -race ./pkg/mcp/builders/...  # Run specific package tests
go test -v -run TestName ./pkg/...    # Run a single test

Architecture Overview

The StreamNative MCP Server implements the Model Context Protocol using the mark3labs/mcp-go library to enable AI agents to interact with Apache Kafka, Apache Pulsar, and StreamNative Cloud resources.

Request Flow

Client Request → MCP Server (pkg/mcp/server.go)
                    ↓
              SSE/stdio transport layer (pkg/cmd/mcp/)
                    ↓
              Tool Handler (from builders)
                    ↓
              Context Functions (pkg/mcp/ctx.go)
                    ↓
              Service Client (Kafka/Pulsar/SNCloud)

Core Components

Server & Sessions (pkg/mcp/server.go)
- Server struct holds MCPServer, KafkaSession, PulsarSession, and SNCloudSession
- Sessions provide lazy-initialized clients for each service
- Context functions (pkg/mcp/ctx.go) inject/retrieve sessions from request context
Tool Builders Framework (pkg/mcp/builders/)
- ToolBuilder interface: GetName(), GetRequiredFeatures(), BuildTools(), Validate()
- BaseToolBuilder provides common feature validation logic
- ToolRegistry manages all tool builders with concurrent-safe registration
- ToolBuildConfig specifies build parameters (ReadOnly, Features, Options)
- ToolMetadata describes tool information (Name, Version, Description, Category, Tags)

Read the full file on GitHub · 248 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 248 lines · 2,639 tokens per session scan A dc6cf6d6dbc9

Subscribe to this mod's changes

streamnative-mcp-server CLAUDE.md is an instructions file published in the GitHub repository streamnative/streamnative-mcp-server (24 stars, last pushed 3d ago), licensed Apache-2.0. It adds 2,639 tokens to every session, about $0.0106 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Backend and APIs Building agents apache-kafka apache-pulsar data-streaming mcp mcp-server streamnative

streamnative-mcp-server CLAUDE.md next to 6 instructions from other repositories
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streamnative-mcp-server: Instructions file for Claude Code