Nod is an approval API for AI agents, scripts, and workflows.
The idea is simple:
We built the web app on Vercel. The dashboard lets teams manage:
For the database, we used Amazon Aurora PostgreSQL. Nod needs a strong relational database because approval data must be correct. An approval is not just a UI card. It has a lifecycle.
pending -> approved
pending -> rejected
pending -> expired
pending -> canceled
Aurora stores the source of truth:
The backend runs on AWS with Lambda workers. One worker sends Slack notifications. Another sends signed callbacks. Another expires old approvals.
A typical flow looks like this:
App or agent
-> Nod API
-> Aurora PostgreSQL
-> Slack or web approval
-> Signed callback
-> App continues
Vercel helped us move fast on the user experience. Aurora gave us the reliable data layer needed for real approvals. Together, they helped us build Nod as infrastructure, not just a demo.
source & further reading
dev.to — original article
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