1. Home
2. Reference documentation
3. Changelog

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

• February 24, 2026
  APIAdditions

  Add Compute error metrics to Historical Stats and Real-Time Analytics APIs

• February 20, 2026
  APIAdditions

  Add Image Optimizer format counting metrics

• February 17, 2026
  JavaScript SDKFixesAdditions

  JavaScript SDK 3.40.0

• February 4, 2026
  APIAdditions

  Add Alerts derived rate metrics for Compute responses

• January 28, 2026
  JavaScript SDKFixesAdditions

  JavaScript SDK 3.39.0

• January 27, 2026
  APIAdditions

  Add datacenter parameter to HSAPI

• January 26, 2026
  APIAdditions

  Add backend fetch timeout

• January 26, 2026
  APIAdditions

  Next-Gen WAF: Added top attacks endpoint

• January 14, 2026
  APIAdditions

  Next-Gen WAF: Added trend visualization type for custom dashboards

• January 12, 2026
  APIAdditions

  Manage thresholds for Next-Gen WAF workspaces