AgentRail Protocol
Autonomous AI Agent Economic Layer on Soroban
Stream Sub-Cent Payments for
AI Agents with Zero Master Key Risk
AgentRail enables autonomous LLMs, Swarms, and MCP tools to pay for inference and data APIs via smart contract scoped allowances. Zero popup interruptions. Built-in protocol fee routing.
Verified Testnet Contract:
CBSWWN2CLUPW4VLYTGVJTT4XWXKF6LLJFQXEC7KK2KTAW3A26WIBZIN6 ↗
🛡️ Scoped Allowance Vault
Smart Contract
⚡ Live Micro-Spend Simulator
Testnet: Active
Active Scoped Allowance
10.0000 XLM
Spent by Agent
0.0000 XLM
Protocol Fee (20 bps)
0.20% (Treasury Split)
Circuit Breaker State
NORMAL (UNPAUSED)
📡 Real-Time Soroban Contract Event Stream
[INIT]
CBSWWN2C...
Soroban Smart Contract initialized on Stellar Testnet. Protocol Fee: 20 bps.
[READY]
ALLOWANCE_VAULT:
Agent allowances armed. Ready for autonomous AI inference settlement.
📐 Protocol Architecture & Verification
| Component | Soroban Implementation | Security Invariant | Explorer Verification |
|---|---|---|---|
| Scoped Allowance Escrow | Rust soroban-sdk::contractimpl |
Agent cannot exceed assigned cap or spend post-TTL expiry | Verified Contract ↗ |
| Fee Splitter Engine | 20 bps (0.20%) auto-routing | Split calculates atomically; 99.8% to destination, 0.2% to Treasury | Init Tx ↗ |
| Emergency Circuit Breaker | Time-locked Multi-Sig Pause/Drain | Instant freeze of agent allowance if prompt injection detected | Source Code ↗ |
| State TTL Rent Keeper | Automatic Ledger TTL Bumping | Contract storage immune to Soroban state archival freezing | Keeper Module ↗ |