# Agentsnap Mcp

> Snapshot tests for AI tool-call traces: diff, validate, and catch silent regressions.

- **Type:** MCP server
- **Install:** `agentstack add mcp-mukundakatta-agentsnap-mcp`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [MukundaKatta](https://agentstack.voostack.com/s/mukundakatta)
- **Installs:** 0
- **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [MukundaKatta](https://github.com/MukundaKatta)
- **Source:** https://github.com/MukundaKatta/agentsnap-mcp
- **Website:** https://doi.org/10.5281/zenodo.20074702

## Install

```sh
agentstack add mcp-mukundakatta-agentsnap-mcp
```

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

## About

# agentsnap-mcp

[](https://www.npmjs.com/package/@mukundakatta/agentsnap-mcp)
[](#)
[](https://modelcontextprotocol.io)

An [MCP](https://modelcontextprotocol.io) server that gives AI assistants the
ability to inspect, normalize, diff, and validate agent tool-call traces.

Built on top of [`@mukundakatta/agentsnap`](https://github.com/MukundaKatta/agentsnap).
Works with Claude Desktop, Cursor, Cline, Windsurf, Zed, and any other MCP client.

## Tools exposed

### `normalize_trace`

Coerce a raw tool-call trace into the canonical agentsnap Trace shape and
compute a deterministic SHA-256 fingerprint hash. Use this to compare runs
cheaply or feed downstream diff tools.

```json
{
  "trace": [
    { "name": "search", "args": { "q": "cats" } },
    { "name": "fetch",  "args": "https://example.com" }
  ],
  "input": "find cats",
  "model": "claude-opus-4-7"
}
```

→

```json
{
  "normalized": {
    "version": 1,
    "model": "claude-opus-4-7",
    "input": "find cats",
    "output": null,
    "tools": [
      { "name": "search", "args": { "q": "cats" } },
      { "name": "fetch",  "args": "https://example.com" }
    ],
    "error": null,
    "fingerprint": { "node": "v22.0.0", "agentsnap": "0.1.0" }
  },
  "hash": "sha256:..."
}
```

### `diff_traces`

Diff a baseline trace against a current run. Returns a uniform
additions / removals / changes vocabulary plus the agentsnap status code
(`PASSED`, `OUTPUT_DRIFT`, `TOOLS_REORDERED`, `TOOLS_CHANGED`, `REGRESSION`).
Use `ignore_paths` to silence noisy fields before classification.

```json
{
  "baseline": { "version": 1, "tools": [{ "name": "search", "args": { "q": "cats" }, "result_hash": "sha256:aaa" }], "error": null, "fingerprint": {...} },
  "current":  { "version": 1, "tools": [{ "name": "search", "args": { "q": "cats" }, "result_hash": "sha256:bbb" }], "error": null, "fingerprint": {...} },
  "ignore_paths": ["tools[].result_hash"]
}
```

→ `{ "same": true, "status": "PASSED", "additions": [], "removals": [], "changes": [] }`

### `validate_snapshot`

Sanity-check a snapshot against the agentsnap Trace schema. Verifies required
fields, tool-entry shape, and surfaces actionable issues. Returns
`valid=true` on success or a list of human-readable problems.

## Install

### Claude Desktop

Add to `claude_desktop_config.json`:

```json
{
  "mcpServers": {
    "agentsnap": {
      "command": "npx",
      "args": ["-y", "@mukundakatta/agentsnap-mcp"]
    }
  }
}
```

### Cursor / Cline / Windsurf / Zed

Same shape, in the appropriate `mcp.json` for your client. Most clients
auto-discover via `npx -y @mukundakatta/agentsnap-mcp`.

### Local install

```bash
npm install -g @mukundakatta/agentsnap-mcp
mcp-agentsnap        # listens on stdio
```

## Why this matters

Agents that call tools drift silently. A tool argument changes shape, a
nondeterministic result flips a downstream branch, an extra tool sneaks in
between releases — none of it shows up in unit tests. agentsnap captures the
trace; this MCP server lets your assistant inspect and reason about traces
directly: normalize one, diff two, or validate a saved snapshot, all from
the model's tool-use surface.

## License

MIT.

## Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [MukundaKatta](https://github.com/MukundaKatta)
- **Source:** [MukundaKatta/agentsnap-mcp](https://github.com/MukundaKatta/agentsnap-mcp)
- **License:** MIT
- **Homepage:** https://doi.org/10.5281/zenodo.20074702

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:** no
- **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/mcp-mukundakatta-agentsnap-mcp
- Seller: https://agentstack.voostack.com/s/mukundakatta
- 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%.