The API Evangelist Newsletter

One email a week from Kin Lane: what the API industry actually published — MCP, OpenAPI, governance, agents, and the fundamentals underneath — read across thousands of API providers and distilled into the threads that matter.

Subscribe to the weekly Also on Mondays: The Specification Layer, read off the specification repositories themselves.

Latest issue · Week of August 7 – August 15, 2026

The Network Learned to See Agent Traffic, and It Learned by Guessing

5,806 posts across the 5,299 API-bearing providers I track between August 7th and 15th. Last week the identity vendors reached into a drawer of old RFCs to answer who is calling. This week the network layer answered a different question — what is this traffic? — and answered it by inspecting headers and guessing. Cloudflare...

Read this issue →

Also: The Specification Layer

A second Monday email on the contracts underneath everything else — OpenAPI, AsyncAPI, JSON Schema, CloudEvents, SPDX, OCI, SLSA and the rest — read straight off the specification repositories. See every issue →

Subscribe to The Specification Layer

Every issue