x402 payment rail for AI agents on 0G. Per-call billing over HTTP 402, receipts anchored on 0G mainnet, 0G Compute inference, 0G Storage memory. No accounts. No human approval.
TollGate is the HTTP 402 payment rail for the 0G AI economy.
The problem: AI agents have no native payment infrastructure — every API call still requires human approval. HTTP 402 was reserved for machine payments in 1997. TollGate makes it real.
How it works:
1. Agent → GET /api/gateway/svc_0g_inference
2. ← 402 challenge (challengeId, payTo, amount, expiresAt)
3. Agent pays USDC on-chain
4. → retries with X-Payment proof
5. ← unlocked response + receipt anchored on 0G mainnet
0G Integration:
• 0G Chain — 5 contracts on mainnet (chainId 16661): AgentReceiptRegistry, AgentIdentityRegistry, ServiceRegistry, AgentBudgetController, DeliveryVerifier
• 0G Compute — real inference routing via @0gfoundation/0g-compute-ts-sdk
• 0G Storage — agent memory anchoring via @0glabs/0g-ts-sdk (real Merkle root)
• Agent ID — on-chain identity binding with memory roots
Features: FICO-style AgentCreditRegistry, ERC-721 receipt NFTs, MCP server (9 tools for Claude Desktop), A2A autonomous agent loop, live SSE payment feed.
Live: toll-gatee.vercel.app | API: tollgate-1.onrender.com
Week 1: Core x402 gateway — HTTP 402 challenge/response, SQLite receipt ledger, replay protection, SHA-256 request binding
Week 2: 0G integration — deployed 5 contracts to 0G mainnet, wired 0G Compute SDK for real inference, 0G Storage SDK for Merkle-root anchoring
Week 3: Agent economy layer — AgentCreditRegistry (FICO scoring), ERC-721 receipt NFTs, A2A autonomous loop, MCP server with 9 tools
Week 4: Polish + security — input validation across all 7 workspaces, integration test suite (12 test cases), README, live demo deployed on Vercel + Render
Bootstrapped. No external funding. Solo builder.