# Action State launches open-source tools to verify AI agent transactions

> Action State Group offers EvidenceBook, Terms Packs and Countersign to let companies audit AI agent actions without a central authority.

Oossa · 2026-10-22 · https://oossa.com/en/action-state-launches-open-source-tools-to-verify-ai-agent-transactions

Startup Action State Group released a set of open-source tools for businesses to independently verify what AI agents did. The suite includes EvidenceBook, which creates tamper‑evident transaction logs, Terms Packs that evaluate whether agent work meets defined rules, and Countersign, a free verification service that signs off on evidence bundles. The tools work offline and can be used even if only one party installs the software. Early adopters include the Mesh‑LLM distributed inference network and the Project Nanda initiative.

## The facts

- Launch announced on 2026-10-22
- EvidenceBook is released under the Apache 2.0 license

## Why it matters

Compliance teams can now audit AI‑driven transactions across company borders without relying on a single party’s records.

## Sources & references

1. [Startup Action State launches tools for verifying interactions between AI agents](https://siliconangle.com/2026/10/22/startup-action-state-launches-tools-for-verifying-interactions-between-ai-agents/) – SiliconANGLE, 2026-10-22

Last updated: 2026-10-22