Mcp Testing
Test FastMCP servers through direct unit tests, in-memory MCP clients, elicitation handlers, and focused deployed-transport integration checks.
Install
$ agentstack add skill-batteryshark-skill-tap-mcp-testing ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ● Shell / process execution Used
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-batteryshark-skill-tap-mcp-testing) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Test a FastMCP Server
- Run
bin/mcp-testing PATHto inventory tests and MCP surfaces, then read [references/test-matrix.md](references/test-matrix.md). - Test pure domain functions directly without an MCP runtime.
- Use an in-memory
Client(server)for component discovery, schema, tool/resource/prompt behavior, errors, structured results, elicitation, authorization, visibility, and task semantics. - Mock at the domain adapter boundary, not FastMCP internals. Assert requested side effects and the absence of forbidden side effects.
- Add subprocess tests only for stdio lifecycle/configuration and HTTP tests only for routing, authentication, proxy, streaming, or deployment integration.
- Test every destructive or external operation across preview, approve, decline, authorization failure, timeout, retry, and duplicate request cases.
- Compare the exposed component catalog or fingerprints when compatibility matters.
Use [agents/test-reviewer.md](agents/test-reviewer.md) to identify missing behavioral and security cases.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: batteryshark
- Source: batteryshark/skill-tap
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.