Your #1 new customer is an AI agent. Are they getting an A?
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.
Hey PH 👋
Excited to share API Report Card, a free tool from the team at SaaStr.ai (yes, Jason Lemkin's crew).
The thesis is simple and a little uncomfortable: AI agents are about to be every API's biggest customer. Not humans clicking "Connect." Not partners doing custom integrations. Agents calling endpoints, reading errors, retrying, paginating, chaining tools.
And most B2B APIs were never designed for that. They're built for a developer who can squint at a docs page and figure things out. Agents can't squint.
API Report Card is a 60-second checkup for exactly this:
- 🅰️ A letter grade (A+ to F) for your API
- 🧪 Category-level scores: auth, errors, docs, pagination, idempotency, agent-readiness
- 🛠 Ready-to-paste prompts you can drop straight into Cursor / Claude / Replit to fix what's flagged
- 🆓 Free, no signup
I ran it on a few APIs I work with daily. The results were… humbling. Endpoints I'd have sworn were solid scored a C. Things I'd never thought about (idempotency keys, structured error envelopes, machine-readable rate-limit headers) turned out to be the difference between an A and a flunk.
A few things I'd love to hear from this community:
1. What grade did your API get? (Brave souls, drop screenshots 👇)
2. What category surprised you the most?
3. If you're building agents, which API issues bite you most often in production?
Huge congrats to the SaaStr.ai team on the ship 🚀
About Agentic API Grader by SaaStr.ai on Product Hunt
“Your #1 new customer is an AI agent. Are they getting an A?”
Agentic API Grader by SaaStr.ai launched on Product Hunt on May 5th, 2026 and earned 60 upvotes and 1 comments, placing #60 on the daily leaderboard. 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.
On the analytics side, Agentic API Grader by SaaStr.ai competes within API, Developer Tools and Artificial Intelligence — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how Agentic API Grader by SaaStr.ai performed against the three products that launched closest to it on the same day.
Who hunted Agentic API Grader by SaaStr.ai?
Agentic API Grader by SaaStr.ai was hunted by GJ. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Agentic API Grader by SaaStr.ai including community comment highlights and product details, visit the product overview.
GJ