API Report Card is a free tool from SaaStr.ai that grades any B2B API for how well it works in an agent-first world. It scores APIs across categories like authentication, error handling, documentation, pagination, idempotency, and overall agent-readiness, surfaces a letter grade from F to A+, and generates ready-to-paste prompts that developers can drop into Cursor, Claude, or Replit to fix the issues.

SaaStr's FREE AI is Unmatched for B2B Advice Most AI is trained on generic content from the LLMs. Ours has learned from 12+ years of curated B2B wisdom, expert insights, and real founder journeys from $1M to $10B ARR. All SaaStr content.