macOS
Homebrewverified · 100%
brew install mcpsnooplocal Homebrew formula metadata
brew / rank 11655
Install mcpsnoop with Homebrew
Transparent proxy and TUI for debugging MCP traffic. Version 0.17.0 via Homebrew; verified 2026-08-01.
install
Additional install commands
overview
Package summary
Transparent proxy and TUI for debugging MCP traffic
Project links
Commands and aliases
- mcpsnoop
history
Project history and usage
mcpsnoop is a transparent proxy and terminal interface for observing Model Context Protocol traffic between an actual AI client and its MCP servers. It captures JSON-RPC frames from stdio or streamable-HTTP connections and supports live inspection, replay, export, comparison, and automated checks.
Project history
The project appeared publicly in June 2026 with an initial v0.1.0 release. It was designed to complement MCP Inspector by sitting directly in the client's real data path rather than establishing a separate inspection connection.
Adoption history
The project distributes a single Go binary through GitHub releases, `go install`, and Homebrew. Its early release series moved from v0.1.0 in June 2026 to v0.16.0 in July 2026, adding workflows for saved sessions and CI-oriented protocol checks alongside the interactive TUI.
How it is used
For stdio servers, users replace the configured server command with `mcpsnoop -- <server command>` and run `mcpsnoop` separately to open the TUI. For streamable HTTP, `mcpsnoop http` acts as a reverse proxy. Commands can reopen, export, compare, replay, validate, and prune captured sessions.
Why package nerds care
mcpsnoop brings packet-inspection conventions to MCP without requiring a language-specific SDK or modified server. Its single-binary packaging and CI exit codes make captured agent-tool traffic usable both interactively and as a reproducible test artifact.
Timeline
- 2026: The official repository and v0.1.0 release appeared on June 27.
- 2026: Version v0.16.0 was released on July 27.
Related projects
- MCP Inspector is the official comparison point; mcpsnoop differs by observing the user's real client-server connection.
- Model Context Protocol and JSON-RPC define the traffic mcpsnoop captures and validates.
Sources
security posture
No protected-tool coverage found yet
No matching local secret-handling manifest was found for mcpsnoop. Nucleus package metadata is still published here so future coverage has a stable package URL.
Install behavior
- No Homebrew bottle metadata was recorded.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
local files
Configuration and credential file locations
These source-backed paths show where this package keeps local settings or durable credentials. Automic Vault can use them as review targets for secret scanning, migration, and command approval.
Configuration files
Config paths the tool may read or write during local use.
- Unix
./.mcpsnoop.toml
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
mcpsnoop | executable | indexed executable | Discovered from the local executable index. |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-08-03
manager version0.17.0
manager updated2026-08-01
local dataunknown
upstreamnot available
latest detectednot detected
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:mcpsnoop |
|---|---|
| Version | 0.17.0 |
| Package manager | Homebrew |
| Homepage | https://github.com/kerlenton/mcpsnoop |
| Repository | https://github.com/kerlenton/mcpsnoop |
| Last updated | 2026-08-01T03:22:33Z |
| Pulse | updated |
| Bottle | not recorded |
| Service | none declared |
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- cross-ecosystem install command graph
- curated configuration and credential file locations
- curated package history
- pkg.so package database