Frequently Asked Questions
GeraNexus — the agentic commerce protocol
What is GeraNexus?
GeraNexus is an open protocol that lets AI agents transact on behalf of users across real-world services. An agent can book a doctor appointment, order food, send money, reserve a ride, or file an insurance claim through one consistent interface, with built-in authentication, payment, dispute, and refund primitives. It is powered by the 22 live Gera Systems verticals and open for third-party service integration.
How does agent authentication work?
Agents authenticate with the user once, receive a scoped, revocable OAuth 2.1 token, and are subject to a per-transaction spending limit set by the user. Every transaction is logged and mirrored to GeraWitness for human-in-the-loop review above a configurable threshold. Users can revoke agent access at any time from their Gera account dashboard.
What happens when a transaction goes wrong?
Every GeraNexus transaction includes a dispute window. The user can dispute through the Gera account, the agent can be instructed to dispute, or GeraWitness can flag the transaction for human review. Refunds are processed via the underlying Gera vertical (for example a GeraEats refund flows through GeraEats dispute handling). Agent errors may be covered by GeraSure Agent-Error Insurance if the user has opted in.
Which services can agents transact on?
Currently: GeraClinic, GeraHome, GeraMarket, GeraEats, GeraRide, GeraCash, GeraSure, GeraRent, GeraJobs, GeraLearn, GeraFarm, GeraCast, GeraCompliance, plus every ecosystem partner on the GeraCity, GeraTycoon, GeraQuest, and GeraRush integrations. New verticals inherit the protocol automatically.
Is GeraNexus open source?
The protocol specification and client SDKs are open. The underlying transaction infrastructure (KYC, payments, dispute handling) remains proprietary to Gera Systems. You can read the full specification at geranexus.com/spec and the reference implementation on GitHub at geraservicesuk/mcp-gera-nexus.