atomic-red-team-mcp
Provides an MCP (Model Context Protocol) server that exposes Atomic Red Team test content and operations, including searching for “atomics,” refreshing/downloading atomic definitions, validating atomic YAML, retrieving a validation schema, and (optionally) executing atomic tests when explicitly enabled.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Execution is explicitly disabled by default (ART_EXECUTION_ENABLED=false) with a warning about dangerous security tests. Optional static bearer token authentication (ART_AUTH_TOKEN) can protect remote hosting, but it is static and appears coarse-grained (no scoped permissions). TLS transport enforcement is not explicitly stated in the provided text; transport is configurable (ART_MCP_TRANSPORT). Secrets guidance recommends not committing tokens, implying expected safe handling.
⚡ Reliability
Best When
Used locally or in a locked-down test environment where tool execution is disabled by default or tightly controlled.
Avoid When
Avoid enabling execute capability on systems where untrusted users or agents can trigger test execution.
Use Cases
- • Integrate Atomic Red Team test discovery into AI assistants via MCP tools
- • Validate Atomic Red Team atomic test YAML before publishing/using
- • Programmatically search and enumerate atomic tests by technique ID, name, description, or platform
- • Optionally execute selected atomic tests in controlled environments
Not For
- • Internet-facing production use without strong authentication and isolation
- • Running destructive or state-changing tests in uncontrolled environments
- • Use as a general-purpose orchestration tool without guardrails for execution
Interface
Authentication
Authentication is disabled by default unless ART_AUTH_TOKEN is set. Token is static (no OAuth flow) and appears to gate all MCP tool/resource access when enabled.
Pricing
README mentions an optional remote server (hosted on Railway) with a free tier, but no concrete limits or pricing are provided in the provided content.
Agent Metadata
Known Gotchas
- ⚠ execute_atomic is disabled by default; enabling ART_EXECUTION_ENABLED can cause potentially dangerous system changes
- ⚠ If auth is not configured (ART_AUTH_TOKEN unset), an MCP server may be accessible without authentication when exposed remotely
Alternatives
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Scores are editorial opinions as of 2026-03-30.