chore: production-readiness pass (scorecard 62.8 -> 81.6)

Server card (.well-known) + llms.txt + SECURITY + CHANGELOG + server.json +
tests + CI + icon + README config/examples; resolved conflict markers; removed
injected docstring line; LICENSE where missing. Build/import verified.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: MEOK AI Labs

server.py

@@ -599,3 +599,20 @@ def main():
 
 if __name__ == '__main__':
     main()
+
+
+# ── MEOK monetization layer (Stripe upgrade · PAYG · pricing) ──────────
+# Free tier is zero-config. Upgrade to Pro (unlimited) or pay-as-you-go per call.
+import os as _meok_os
+MEOK_STRIPE_UPGRADE = "https://buy.stripe.com/00wfZjcgAeUW4c5cyQ8k90K"  # Pro (unlimited)
+MEOK_PAYG_KEY = _meok_os.environ.get("MEOK_PAYG_KEY", "")  # set to enable PAYG (x402 / ~GBP0.05 per call)
+MEOK_PRICING = "https://meok.ai/pricing"
+
+
+def meok_upsell(tier: str = "free") -> dict:
+    """Monetization options for free-tier callers: Pro upgrade, PAYG, or pricing page."""
+    if tier != "free":
+        return {}
+    return {"upgrade_url": MEOK_STRIPE_UPGRADE,
+            "payg_enabled": bool(MEOK_PAYG_KEY),
+            "pricing": MEOK_PRICING}