---
title: "Sigstore Cosign Verifier"
description: "Automates container image signature verification using Cosign CLI and the Rekor transparency log API. Validates SLSA provenance attestations and checks Fulcio certificate chains for keyless signing."
verification: "security_reviewed"
source: "https://github.com/sigstore/cosign"
author: "sigstore"
category:
  - "Security & Verification"
framework:
  - "Cursor"
tool_ecosystem:
  github_repo: "sigstore/cosign"
  github_stars: 5830
---

# Sigstore Cosign Verifier

Automates container image signature verification using Cosign CLI and the Rekor transparency log API. Validates SLSA provenance attestations and checks Fulcio certificate chains for keyless signing.

## Installation

Choose whichever fits your setup:

1. Copy this skill folder into your local skills directory.
2. Clone the repo and symlink or copy the skill into your agent workspace.
3. Add the repo as a git submodule if you manage shared skills centrally.
4. Install it through your internal provisioning or packaging workflow.
5. Download the folder directly from GitHub and place it in your skills collection.

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/sigstore-cosign-verifier-2/)