DEX Oracle
DEX Oracle is a paid intelligence API for Tempo StablecoinDEX. Agents use HTTP 402 payments to receive order-book data, risk assessments, and execution guidance.

Onchain testnet payment flow
Live StablecoinDEX reads
Risk-scored API responses
Public source
The engineering constraint.
Autonomous agents need reliable market data without accounts, subscriptions, or permanent API credentials. Raw order-book data also needs interpretation before an agent makes a trade.
How the system works.
The Rust service reads StablecoinDEX state through RPC. It finds pairs, evaluates spread and liquidity risk, and protects endpoints with the Machine Payments Protocol. The client makes a PathUSD payment and sends the receipt with its next request.
What the current release proves.
The prototype provides paid quote, pair, risk, and insight endpoints on the Tempo Moderato testnet. A free dashboard shows service activity. The project demonstrates machine payments for market data.
Technology and primary sources
- Rust
- Axum
- Alloy
- HTTP 402
- Tempo