DEVELOPERS
Developer docs.
Integrate at the action boundary.
Start with the live NexusEval contracts, then place evaluation and gating immediately before the external tool call.
Reference architecture
Your agent→Build proposed action→NexusEval / policy checks→PASS / WARN / BLOCK→External tool
Inspect before paying
NexusEval publishes machine-readable discovery. A caller can inspect the live resource, network, asset, recipient and contract before authorizing a payment. A payment challenge is not itself revenue or a completed purchase.
Example request
curl -X POST https://nexuseval.vercel.app/api/gate \
-H 'content-type: application/json' \
-d '{
"objective":"launch review",
"audience":"B2B buyers",
"headline":"Agent-produced copy",
"copy":"Evaluate before publish",
"cta":"Request access"
}'
# unpaid call returns the live payment requirement when applicable