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This changelog provides information on changes across the Fastly platform, including to the VCL language, our public API, CLI, the Terraform provider, Terraform provider (beta), Compute Rust SDK, Compute JavaScript SDK, Compute Go SDK, and the Next-Gen WAF.

September 15, 2026
API Additions
Add AI Runtime Control requests metric to Historical Stats and Real-Time Analytics APIs
September 1, 2026
API Additions
Add Image Optimizer Input and Output metrics
September 1, 2026
API Additions
Add status 499 metric to Historical Stats, Real-Time Analytics, and Domain Inspector APIs
September 1, 2026
API Fixes
Correct documented filter values for Next-Gen WAF account rules
August 24, 2026
API Additions
Add headless bot metric to Historical Stats and Real-Time Analytics APIs
August 11, 2026
API Additions
Add Private Access Token (PAT) challenge metrics to Historical Stats and Real-Time Analytics APIs
August 4, 2026
API Changes
Next-Gen WAF: Error responses now documented for all endpoints
August 4, 2026
API Additions
Next-Gen WAF: `created_by` field now included in rules and signals
July 28, 2026
API Additions
Fastly DNS
July 21, 2026
API Additions
Add HTTP and TLS metrics to historical and real-time Domain Inspector APIs

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