Overview table
| Provider | Category | Docs / Get Started | Notes |
|---|---|---|---|
| Semantic Pay | x402 facilitator | https://docs.semanticpay.io/supported-chains#stable | Public x402 facilitator for Stable; verifies and settles USDT0 payments via ERC-3009 |
Semantic Pay
Payment infrastructure for AI agents — trustless, P2P, and permissionless. Semantic Pay operates as an x402-compatible payment facilitator on Stable, settling USDT0 payments via ERC-3009 (transferWithAuthorization). Agents do not need gas tokens in their wallets.
Developers integrating x402 on Stable point their middleware to https://x402.semanticpay.io. No custom settlement infrastructure is required.
Capabilities
- Payment payload verification (
/verify) and on-chain settlement (/settle) via USDT0 - Gasless transfers using ERC-3009
transferWithAuthorization - Spend limits, approval flows, and kill switches for agent oversight
- End-to-end traceability with full audit logging from intent through settlement
- Event callbacks for real-time payment lifecycle updates
https://x402.semanticpay.io
Docs: https://docs.semanticpay.io/supported-chains#stable
Have an agentic payments integration with Stable? Reach out at bizdev@stable.xyz.