# Mcp Testing

> Test FastMCP servers through direct unit tests, in-memory MCP clients, elicitation handlers, and focused deployed-transport integration checks.

- **Type:** Skill
- **Install:** `agentstack add skill-batteryshark-skill-tap-mcp-testing`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [batteryshark](https://agentstack.voostack.com/s/batteryshark)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [batteryshark](https://github.com/batteryshark)
- **Source:** https://github.com/batteryshark/skill-tap/tree/main/skills/development/mcp/mcp-testing

## Install

```sh
agentstack add skill-batteryshark-skill-tap-mcp-testing
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Test a FastMCP Server

1. Run `bin/mcp-testing PATH` to inventory tests and MCP surfaces, then read [references/test-matrix.md](references/test-matrix.md).
2. Test pure domain functions directly without an MCP runtime.
3. Use an in-memory `Client(server)` for component discovery, schema, tool/resource/prompt behavior, errors, structured results, elicitation, authorization, visibility, and task semantics.
4. Mock at the domain adapter boundary, not FastMCP internals. Assert requested side effects and the absence of forbidden side effects.
5. Add subprocess tests only for stdio lifecycle/configuration and HTTP tests only for routing, authentication, proxy, streaming, or deployment integration.
6. Test every destructive or external operation across preview, approve, decline, authorization failure, timeout, retry, and duplicate request cases.
7. 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](https://github.com/batteryshark)
- **Source:** [batteryshark/skill-tap](https://github.com/batteryshark/skill-tap)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** yes
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-batteryshark-skill-tap-mcp-testing
- Seller: https://agentstack.voostack.com/s/batteryshark
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.