java-mcp-client-server

Minimal working example of an MCP setup using Spring AI: an MCP server exposing tools over SSE/WebMVC and an MCP client that connects to the server and uses a Mistral LLM to orchestrate tool calls, with an additional simple frontend to interact with queries.

Evaluated Apr 04, 2026 (16d ago)
Repo ↗ DevTools mcp spring-ai spring-boot java llm sse webmvc client-server demo
⚙ Agent Friendliness
33
/ 100
Can an agent use this?
🔒 Security
22
/ 100
Is it safe for agents?
⚡ Reliability
25
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
55
Documentation
45
Error Messages
0
Auth Simplicity
20
Rate Limits
0

🔒 Security

TLS Enforcement
40
Auth Strength
10
Scope Granularity
0
Dep. Hygiene
40
Secret Handling
30

Provided README does not mention TLS enforcement, authentication/authorization, scopes, rate limits, or secret-management practices. Security posture is therefore assumed to be minimal for a demo. TLS/auth should be explicitly added/verified before any real deployment.

⚡ Reliability

Uptime/SLA
0
Version Stability
40
Breaking Changes
30
Error Recovery
30
AF Security Reliability

Best When

You want a lightweight educational/demo implementation to understand MCP tool calling with Java/Spring AI and quickly spin up client/server locally.

Avoid When

You need robust authentication, rate-limit documentation, and well-defined error contracts suitable for multi-tenant production use.

Use Cases

  • Learning/prototyping MCP tool integration with Spring Boot and Spring AI
  • Building a small agentic workflow where an LLM can call server-side tools
  • Demonstrating end-to-end wiring of MCP server (SSE) and client orchestration
  • Local development demo with a simple web UI

Not For

  • Production deployments requiring strong security hardening, auth, and operational guarantees
  • Compliance-sensitive environments without documented compliance/security controls
  • Use cases needing a fully documented public API contract (OpenAPI) or SDK

Interface

REST API
Yes
GraphQL
No
gRPC
No
MCP Server
Yes
SDK
No
Webhooks
No

Authentication

OAuth: No Scopes: No

No authentication mechanisms are mentioned in the provided README content; assume none or undocumented.

Pricing

Free tier: No
Requires CC: No

No pricing info provided; likely depends on your chosen Mistral usage and infrastructure costs.

Agent Metadata

Pagination
none
Idempotent
False
Retry Guidance
Not documented

Known Gotchas

  • No auth/rate-limit/error contract details were provided, so agents may need defensive handling (timeouts, retries, and tool-call validation).
  • SSE-based streaming endpoints can have subtle reconnect/timeout behaviors; without documented guidance, agent integrations should implement robust network retry/backoff at the HTTP client layer.

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Scores are editorial opinions as of 2026-04-04.

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