callwitness
callwitness is an MIT-licensed Python package that records every tool call made by an AI agent without blocking execution. It is intended for developers building agent systems who need call-level observability, auditing, and security analysis, including MCP-based workflows.
Overview
5 featuresIn the Agent monitoring & governance space, callwitness takes a focused approach. It focuses on tracking AI agent tool calls for observability, auditing, and security without blocking execution. It is built as an open-source project for AI agent developers and security engineers. callwitness is open source under the MIT license. It ships for the command line, and it can be self-hosted.
Aditi Chaudharyy14 builds and maintains callwitness, and it first shipped in 2026. The project is developed in the open on GitHub with 33 commits in the last 90 days. Key capabilities include tool call recording, agent observability, and security auditing. It exposes integrations via an MCP server.
Summary written by a language model from the project’s public pages.
- Tool call recording
- Agent observability
- Security auditing
- MCP support
- Non-blocking capture
Built with & integrations
- Claude Code
- commit c2c3b24e15c1 · since Sept 2026
Trust & compliance
Indexing history
1What PulseGate has recorded for this listing
- Indexed11 Sept · 09:08 UTCcallwitness verified via PyPI Bulk EnumeratorSource: PyPI Bulk Enumerator · Open
Frequently asked questions about callwitness
- What does callwitness do?
- Callwitness focuses on tracking AI agent tool calls for observability, auditing, and security without blocking execution. It is catalogued under Agent monitoring & governance on PulseGate.
- Who is callwitness for?
- callwitness is an open-source project built for AI agent developers and security engineers.
- Does callwitness have a free plan?
- Yes — callwitness is open source under the MIT license and free to use.
- What platforms does callwitness run on?
- callwitness runs on the command line. It can also be self-hosted.
- Is callwitness still maintained?
- The GitHub repository shows 33 commits in the last 90 days.
- What are alternatives to callwitness?
- Similar projects tracked by PulseGate include NotiLens, Fiddler AI, and Laminar.NotiLensFiddler AILaminar
- Who makes callwitness?
- callwitness is developed by Aditi Chaudharyy14.
- When did callwitness launch?
- callwitness first shipped in 2026.
Also in Agent monitoring & governance
Same category — not a similarity match