Skip to content
JBJash Bohare
All projects
Payments & Infra · Machine-to-machine payments · 2026Casper testnet

AgentPay

An on-chain service registry and x402 micropayments for pay-per-call API access on Casper.

GitHubDemo video
Contracts
3 on Casper
Verification
< 500 ms
01  The problem

Paying for an API per call is still a human workflow: sign-ups, keys, invoices. Automated clients need to discover a service, pay for one call and move on.

Providers list their APIs in an on-chain registry and add one middleware. Clients find providers through an MCP server, attach a signed x402 payment header, and settlement and reputation updates happen on Casper.

02  How it works
12345userClient agentserviceMCP serverexternalProvider APIcontractRegistryserviceFacilitatorcontractPayment + Reputation
Hover or tap a step
03  What I built
  1. 01Registry, Payment and Reputation contracts in Rust on Casper testnet.
  2. 02A TypeScript MCP server with search, call, balance and history tools.
  3. 03Provider middleware and a facilitator that verify signature, nonce, balance and limit in under 500 ms.
Next sheet
StableX

An ERC-20 built without OpenZeppelin core: capped supply, role-based minting and USDC-style blacklisting.