> This page is for NVIDIA Cluster Readiness Engine, version v0.5.0.
> For other versions, use one of these documentation indexes:
> - Latest · v0.7.0 (default): https://docs.nvidia.com/cluster-readiness-engine/v0.7.0/llms.txt
> - v0.6.0: https://docs.nvidia.com/cluster-readiness-engine/v0.6.0/llms.txt
> - v0.5.0: https://docs.nvidia.com/cluster-readiness-engine/v0.5.0/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/cluster-readiness-engine/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/cluster-readiness-engine/_mcp/server.

# API Reference Overview

> Kubernetes CRD reference for the NVIDIA Cluster Readiness Engine.

The NVIDIA Cluster Readiness Engine defines the following custom resources under the `nvcre.nvidia.com/v1alpha1` API group.

| Resource | Scope | Purpose |
|----------|-------|---------|
| [Certification](/cluster-readiness-engine/v0.5.0/api-reference/certification) | Namespaced | Top-level certification suite |
| [Workflow](/cluster-readiness-engine/v0.5.0/api-reference/workflow) | Namespaced | Single-category test run |
| [Job](/cluster-readiness-engine/v0.5.0/api-reference/job) | Namespaced | Workload executor and health monitor |
| [WorkloadRun](/cluster-readiness-engine/v0.5.0/api-reference/workload-run) | Namespaced | Simplified ad-hoc workload API |
| [GoodputMeasurement](/cluster-readiness-engine/v0.5.0/api-reference/goodput-measurement) | Namespaced | Log-based training throughput measurement |
| [BandwidthMeasurement](/cluster-readiness-engine/v0.5.0/api-reference/bandwidth-measurement) | Namespaced | NCCL bandwidth measurement |
| [LogProfile](/cluster-readiness-engine/v0.5.0/api-reference/log-profile) | Cluster-scoped | Regex patterns for log parsing |

## Field reference

The per-resource pages document spec and status fields derived from the CRD schemas in `api/v1alpha1/`. Detailed field-level documentation is on each resource page.