Crucible review
A broad CLI for testing agent attack lifecycles locally and in CI/CD.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Crucible is an open-source Python CLI for testing AI agents before production. It runs adversarial payloads against HTTP or MCP-accessible agents, covering prompt injection, jailbreaks, unsafe content, tool misuse, memory poisoning, MCP risks, behavioral drift, and multi-turn attacks. It is aimed at agent teams that need repeatable security checks across development and CI/CD, with support documented for LangChain, CrewAI, AutoGen, and raw MCP endpoints.
The Community plan costs $0 per month and includes the full CLI and test modules, 153 attack vectors across 11 modules, local and CI reports in JSON and HTML, and Community Discord support. Its testing scope is notably broad: Crucible includes direct and indirect injection payloads, safety-policy bypass tests, toxicity and content-safety checks, MCP server scanning, memory and RAG poisoning lifecycle tests, and configurable CI/CD failure thresholds. Team adds drift monitoring, Slack alerts, regression tracking, hosted dashboards, historical trends, and priority support. Enterprise adds SSO, audit logs, on-premises or VPC deployment, custom attack modules, SLAs, and dedicated security engineering support.
Crucible fits teams that want a self-hosted testing workflow and explicit findings, grades, reproduction steps, and OWASP mappings rather than a narrow prompt-only checker. Its integrations cover common agent frameworks plus MCP, Slack, and CI/CD, giving teams several ways to place scans into an existing development process. The Team tier is listed as Early Access, and hosted dashboards are described as upcoming or early-access functionality. Teams needing those capabilities immediately, or a platform beyond HTTP and MCP-accessible agents, should evaluate alternatives; teams focused on complex, multi-stage agent threats should consider Crucible.
Crucible pros and cons
- Where it wins
- 153 attack vectors across 11 modules in the Community plan
- Covers prompt injection, jailbreaks, MCP abuse, and poisoning attacks
- JSON and HTML reports with severity findings and OWASP mappings
- Where it doesn't
- Team features are listed as Early Access
- Hosted dashboards are upcoming or early-access functionality
- Enterprise pricing is custom rather than publicly stated
Crucible fact sheet, pricing and score →
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