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MCP server · Security

Cassette

by · github.com/ivermin1123/mcp-cassette

Record a real MCP session once, replay it forever. VCR-style record/replay, contract snapshots, and safety checks for Model Context Protocol servers.

Unclaimed cicontract-testingdeveloper-toolsmcpmockingmodel-context-protocolrecord-replaysecuritytestingtypescript
InstallView source
37Low

Scored a month ago · breakdown

About Cassette

Cassette is an MCP server published by ivermin1123 in the Security category: record a real MCP session once, replay it forever. VCR-style record/replay, contract snapshots, and safety checks for Model Context Protocol servers.

Recent commit activity is the strongest signal that reported issues will get attention.

Install

Claude Code
claude mcp add cassette -- npx -y mcp-cassette
npx
npx -y mcp-cassette

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

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Security checks

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Releases

v0.7.0v0.7.0 · 8 Oct 2026What's Changed feat(action): write SARIF behind a sarif-file input, and report on a failing gate by @ivermin1123 in https://github.com/ivermin1123/mcp-cassette/pull/76 feat(jest): add a jest adapter alongside the vitest one by @ivermin1123…
v0.6.0v0.6.0 · 8 Oct 2026What's Changed feat(action): add lint-fail-on so the safety lint can report without gating by @ivermin1123 in https://github.com/ivermin1123/mcp-cassette/pull/72 feat(replay): replay server-initiated frames at their recorded position by…
v0.5.0v0.5.0 · 8 Oct 2026What's Changed docs: write for the reader who is a machine by @ivermin1123 in https://github.com/ivermin1123/mcp-cassette/pull/60 docs: write down that rule ids are a public contract by @ivermin1123 in…
v0.4.1v0.4.1 · 8 Oct 2026Full Changelog: https://github.com/ivermin1123/mcp-cassette/compare/v0.4.0...v0.4.1
v0.4.0v0.4.0 · 16 Aug 2026What's Changed ci(release): float the minor tag, and say which pin to use by @ivermin1123 in https://github.com/ivermin1123/mcp-cassette/pull/45 docs: give durable decisions a tracked home by @ivermin1123 in…
Questions

About Cassette

How do I install Cassette?

Run claude mcp add cassette -- npx -y mcp-cassette, then add the server to your MCP client's configuration.

Is Cassette safe to use with an AI agent?

Its trust score is 37 out of 100 (low). Conduid hasn't run static security checks on this repository yet, so review the source yourself before granting it credentials. It has no ConduID identity yet, so agent calls to it are not receipted.

Is Cassette still maintained?

Yes — the latest release is v0.7.0 (8 Oct 2026), and the last commit was 13 days ago. The repository has 0 stars.