Add access-model block (free for humans, x402 for agents)

README.md

@@ -180,3 +180,11 @@ Use the file's observation date, scope and licence when reusing it. Repository u
 
 Measurement is not certification. A repository, signed record or passing software test does not by itself establish current board admission, product acceptance or benchmark leadership.
 <!-- /council-product-guide:v1 -->
+
+<!-- ACCESS-MODEL:START -->
+## Access model
+
+**Humans: free.** Browse, verify, and download everything here in your browser — no login, no paywall: [free verify](https://councilof.ai/gspc-verify/) · [full catalogue](https://councilof.ai/catalogue).
+**Agents/machines:** every call in this catalogue is priced over [x402](https://www.x402.org) — USDC, pay-per-call, no keys, no subscription. Machine entry: [councilof.ai/mcp](https://councilof.ai/mcp).
+Measurement, not certification.
+<!-- ACCESS-MODEL:END -->