Api-Authentication

TL;DR On January 15, 2026, Anthropic deprecated subscription-based authentication for Claude API access, requiring all automation tools to migrate from x-api-key headers with subscription keys to project-scoped API keys. This change breaks existing Linux automation workflows that relied on subscription authentication. Immediate Impact: Tools like ansible-claude-runner, terraform-ai-provider, and custom monitoring scripts using subscription keys will fail with 401 Unauthorized errors. Your existing automation playbooks, CI/CD pipelines, and cron jobs calling Claude API are now non-functional. ...

TL;DR On January 15, 2026, Anthropic deprecated subscription-based authentication for Claude API access, requiring all integrations to migrate from x-api-key: sk-ant-sub-* tokens to project-based API keys (sk-ant-api03-*) by March 1, 2026. This breaks numerous Linux automation tools that hardcoded subscription auth patterns. Immediate Impact: Popular tools affected include ansible-ai-connect (uses Claude for playbook generation), terraform-llm-validator (validates HCL with AI review), and prometheus-alert-analyzer (AI-powered alert triage). Scripts using the legacy auth pattern will receive 401 Unauthorized errors after the cutoff. ...