mcp-openapi-server

A Java-based MCP (Model Context Protocol) server project intended to dynamically expose OpenAPI definitions as MCP tools for consumption by LLMs via an MCP client. The provided metadata does not confirm runtime behavior, but describes a Spring OpenAPI-to-MCP bridge.

Evaluated Apr 04, 2026 (16d ago)
Repo ↗ DevTools mcp openapi llm-tools integration spring java
⚙ Agent Friendliness
32
/ 100
Can an agent use this?
🔒 Security
35
/ 100
Is it safe for agents?
⚡ Reliability
15
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
35
Documentation
30
Error Messages
0
Auth Simplicity
40
Rate Limits
20

🔒 Security

TLS Enforcement
40
Auth Strength
30
Scope Granularity
20
Dep. Hygiene
50
Secret Handling
40

Based on provided metadata only: TLS/auth/secret handling and scope granularity are not evidenced. Treat as requiring verification in repository code/docs before production agent deployment.

⚡ Reliability

Uptime/SLA
0
Version Stability
20
Breaking Changes
20
Error Recovery
20
AF Security Reliability

Best When

You need to expose OpenAPI-described endpoints to an MCP-capable LLM workflow and can validate the server’s configuration, security, and tool mapping from the actual repository.

Avoid When

You cannot verify how the server handles authentication/authorization forwarding, secrets, and error/rate-limit semantics from the repository documentation.

Use Cases

  • Connecting LLM agents to existing REST APIs described by OpenAPI specs via MCP tools
  • Rapid tool creation from OpenAPI documents for agent function calling
  • Building an integration layer between an MCP client and OpenAPI-described services

Not For

  • Direct end-user API consumption (typical REST client workflows)
  • Use where OpenAPI security/auth requirements and tool-level authorization are already fully managed elsewhere without additional safeguards
  • Production use without verifying operational details (auth, error handling, rate limiting, idempotency) in the repo/docs

Interface

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

Authentication

OAuth: No Scopes: No

Authentication/authorization mechanisms are not described in the provided metadata; score based on absence of verified info.

Pricing

Free tier: No
Requires CC: No

No pricing information available in provided metadata.

Agent Metadata

Pagination
none
Idempotent
False
Retry Guidance
Not documented

Known Gotchas

  • OpenAPI-to-tool mapping may not preserve request/response schemas perfectly (tool argument shaping can be lossy).
  • If the MCP server forwards auth headers or cookies, misconfiguration can lead to tool calls failing or leaking credentials.
  • Agent retries on non-idempotent operations may cause unintended side effects unless idempotency is clearly documented.

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

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