I Scanned 10 Developer Tools for AI Agent-Readiness. Only One Passed.

Everyone's building AI agents. Nobody's building for them. I've been working on agent integrations and kept running into the same problem: when we say "AI agents can use APIs," how many developer tools are actually set up for an agent to discover and interact with autonomously? So I ran an agent-readiness audit on 10 well-known developer tools. The scanner checks 32 signals across 6 categories: Discoverability — can agents find you? Comprehension — can agents understand your API? Usability — can agents interact with you? Stability — can agents depend on you? Agent Experience — what happens when an agent shows up? Transactability — can agents do business with you? Each category gets a tier: Ready, Partial, or Not Ready. To "pass," a tool needs at least half its categories at Ready. One tool passed. Nine didn't. The Results Resend — 4/6 Ready ✅ The clear winner, and it wasn't close. Resend has an MCP endpoint at /.well-known/mcp.json, a public OpenAPI spec with 39 fully documented endpoi