test-mcp-echo-server

An MCP echo server intended for testing: accepts an MCP tool call / request and returns the provided input (mirrors/echoes it) to help validate agent-to-server plumbing.

Evaluated Apr 04, 2026 (20d ago)
Homepage ↗ DevTools mcp echo testing developer-tools integration
⚙ Agent Friendliness
45
/ 100
Can an agent use this?
🔒 Security
27
/ 100
Is it safe for agents?
⚡ Reliability
30
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
55
Documentation
35
Error Messages
0
Auth Simplicity
95
Rate Limits
10

🔒 Security

TLS Enforcement
20
Auth Strength
20
Scope Granularity
0
Dep. Hygiene
40
Secret Handling
60

As an echo server for testing, it likely has limited auth and may echo sensitive inputs if used improperly. TLS and dependency/security practices were not provided, so scores reflect uncertainty and typical minimal test-service defaults.

⚡ Reliability

Uptime/SLA
0
Version Stability
50
Breaking Changes
30
Error Recovery
40
AF Security Reliability

Best When

You need a minimal, deterministic MCP target for integration tests and smoke checks.

Avoid When

You require authentication, rate limiting, persistence, or strong security controls as part of the service contract.

Use Cases

  • Testing MCP integration between an agent and a server
  • Verifying tool-call request/response wiring and serialization
  • Debugging agent behavior and input formatting

Not For

  • Production-grade data handling or secure user-facing workloads
  • Storing or transforming sensitive data
  • Handling high-volume workloads with strict SLAs

Interface

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

Authentication

OAuth: No Scopes: No

No authentication details were provided in the supplied package information; likely none for a test echo server.

Pricing

Free tier: No
Requires CC: No

No pricing details were provided; as a test utility it is likely free/local.

Agent Metadata

Pagination
none
Idempotent
True
Retry Guidance
Not documented

Known Gotchas

  • Echo servers may not validate input schemas strictly, so tests may pass even if your real tool has schema/validation logic.
  • If the server is local-only, agents running in remote environments may need tunneling/network access.
  • Without documented error codes, agents may struggle to implement targeted retry/backoff.

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

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