mcp-mock-server

A simple Model Context Protocol (MCP) mock server for developing and testing MCP clients. It exposes configurable mock tools, prompt templates, and mock resources via StreamableHTTP or SSE using a YAML configuration file.

Evaluated Apr 04, 2026 (16d ago)
Repo ↗ Testing mcp mock-server testing sse streamable-http go
⚙ Agent Friendliness
53
/ 100
Can an agent use this?
🔒 Security
22
/ 100
Is it safe for agents?
⚡ Reliability
18
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
55
Documentation
65
Error Messages
0
Auth Simplicity
95
Rate Limits
10

🔒 Security

TLS Enforcement
20
Auth Strength
10
Scope Granularity
0
Dep. Hygiene
40
Secret Handling
50

The README describes host/port and transport but does not mention TLS enforcement, authentication, authorization, or rate limiting. It also provides no guidance on how secrets/configuration are protected. As a local mock server, it may be acceptable for dev, but it lacks documented security controls for untrusted environments.

⚡ Reliability

Uptime/SLA
0
Version Stability
25
Breaking Changes
25
Error Recovery
20
AF Security Reliability

Best When

During local development or CI where you want deterministic mock MCP responses and transport coverage.

Avoid When

When you need strong security guarantees (auth, TLS requirements, rate limiting) or well-defined operational/SLA characteristics.

Use Cases

  • Developing an MCP client without needing real back-end systems
  • Testing tool invocation flows (parameterized templates)
  • Testing prompt generation and resource retrieval against deterministic mock data
  • Integration testing of transport handling (StreamableHTTP and SSE)

Not For

  • Production-grade MCP backends (security/auth controls and robustness are not described)
  • Use cases requiring real external data access
  • High-availability services where uptime guarantees and operational guidance are required

Interface

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

Authentication

OAuth: No Scopes: No

No authentication mechanism is described in the provided README/config instructions; it appears intended for local development.

Pricing

Free tier: No
Requires CC: No

Open-source project metadata provided; no pricing information in the README.

Agent Metadata

Pagination
none
Idempotent
False
Retry Guidance
Not documented

Known Gotchas

  • No auth/rate-limit behavior is documented; agents may need to handle failures or limits defensively.
  • Transport choice (StreamableHTTP vs SSE) may affect client compatibility; ensure the client matches the configured transport.

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

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