mcp-server-java-sse-http-demo
Provides a demo Java MCP (Model Context Protocol) server that exposes tools over an SSE-based HTTP transport (Jetty). The repository also demonstrates a “fast-agent” workflow that can call other MCP servers (e.g., websearch for geocoding) and then call the included weather MCP server to summarize forecasts.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Based on README alone, the SSE/POST endpoints appear unauthenticated and are intended for local demonstration. TLS requirements, authn/authz, scope granularity, and rate limiting are not documented. This should be treated as insecure by default for any non-local/untrusted environment.
⚡ Reliability
Best When
For local demos, learning, and early prototypes that need an SSE HTTP transport MCP server in Java.
Avoid When
When you need enterprise-grade security controls, strong auth, and clearly specified reliability guarantees (retries/idempotency, error codes, rate limits) out of the box.
Use Cases
- • Demonstrate MCP server integration over HTTP using SSE
- • Build/learn MCP tool implementations in Java
- • Prototype multi-MCP “agent” flows (e.g., geocoding then weather)
- • Local development/testing of SSE MCP message streaming
- • Educational reference for wiring MCP with minimal Spring usage
Not For
- • Production deployments requiring hardened security, rate limiting, and operational safeguards
- • Use as-is for handling untrusted client traffic on the public internet
- • Workloads needing guaranteed uptime/SLA or rigorous error/retry semantics
Interface
Authentication
No authentication mechanism is described for the SSE endpoint or the message POST endpoint. README shows unauthenticated curl commands to /sse and /mcp/message.
Pricing
No pricing information present; appears to be an open-source demo.
Agent Metadata
Known Gotchas
- ⚠ Repo explicitly states it is not production grade; expect incomplete operational behaviors (auth, rate limits, robust error/retry semantics).
- ⚠ SSE configuration requires sessionId for follow-up message POSTs; agents must propagate/retain that sessionId from the SSE exchange.
- ⚠ No auth described; agents interacting from untrusted networks should not do so without adding external protections.
Alternatives
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Scores are editorial opinions as of 2026-04-04.