T
Teresa Lopez
Hello 0x team,
We request Swap API / Price API support for
chainId 138 — DeFi Oracle Meta Mainnet
, an EVM-compatible QBFT network operated by DBIS / DeFi Oracle Meta.
### Chain information
| Field | Value |
|-------|--------|
| Chain ID | 138 (0x8a) |
| Network name | DeFi Oracle Meta Mainnet |
| Consensus | QBFT |
| Finality | ~1 block |
| Block time | ~2 seconds |
| Native currency | ETH (18 decimals) |
| Public RPC (HTTPS) | https://rpc-http-pub.d-bis.org |
| Alternate RPC | https://rpc-http-prv.d-bis.org · https://rpc.public-0138.defi-oracle.io |
| WebSocket | wss://rpc-ws-pub.d-bis.org |
| Block explorer | https://explorer.d-bis.org |
| Chainlist | https://chainlist.org/chain/138 |
| Documentation | https://github.com/Defi-Oracle-Tooling/smom-dbis-138 |
### Live on-chain liquidity (production, official upstream deploys)
DODO V2 (PMM — primary hub venue)
  • DODOV2Proxy02: 0xEF6E6F41A522896a9EE1C580C87C05E409193F8d
  • DVMFactory: 0xc93870594C7f83A0aE076c2e30b494Efc526b68E
  • DODOPMMIntegration (live traded pools): 0x86ADA6Ef91A3B450F89f2b751e93B1b7A3218895
  • Funded PMM pools include cUSDT/cUSDC, cBTC pairs, WETH/USDC, WETH/USDT (8 live pools)
Uniswap V2 (native)
  • Factory: 0x0C30F6e67Ab3667fCc2f5CEA8e274ef1FB920279
  • Router02: 0x3019A7fDc76ba7F64F18d78e66842760037ee638
Uniswap V3 (native)
  • Factory: 0x2f7219276e3ce367dB9ec74C1196a8ecEe67841C
  • SwapRouter02: 0xde9cD8ee2811E6E64a41D5F68Be315d33995975E
Multicall3:
0xcA11bde05977b3631167028862bE2a173976CA11
### Primary hub tokens (Chain 138)
  • cUSDC: 0xf22258f57794CC8E06237084b353Ab30fFfa640b (6 decimals)
  • cUSDT: 0x93E66202A11B1772E55407B32B44e5Cd8eda7f22 (6 decimals)
  • cUSDC_V2 (ERC-3009): 0x219522c60e83dEe01FC5b0329d6fA8fD84b9D13d
  • cUSDT_V2 (ERC-3009): 0x9FBfab33882Efe0038DAa608185718b772EE5660
  • cBTC: 0xe94260c555ac1d9d3cc9e1632883452ebdf0082e (8 decimals)
### Use case
We operate a live
x402 paid API
at https://x402.d-bis.org. Agent flows prefund via swap/bridge before HTTP 402 settlement:
  • Today: 0x quotes work on Base (8453), Polygon (137), Ethereum (1), etc.
  • Chain 138 hub swaps currently fall back to DODO PMM only: https://x402.d-bis.org/api/x402/preflight/dodo-138
  • Goal: enable
    chainId=138
    on 0x Swap API so agents can route hub liquidity through 0x aggregation (DODO + UniV2/V3) before paying on 138.
Our preflight endpoint (0x, other chains): https://x402.d-bis.org/api/x402/preflight/0x
### Integration readiness
  • Public RPC and explorer are stable and verified.
  • Official protocol contracts deployed from upstream repos (DODO, Uniswap) — not custom pilot routers.
  • CCIP bridge infrastructure exists for cross-chain settlement with Ethereum mainnet.
  • We can provide test API keys, operator contact, and liquidity/volume estimates on request.
### Contact
Organization: DBIS / DeFi Oracle Meta
Domains: d-bis.org · defi-oracle.io
Email: submissions@d-bis.org
Thank you for considering Chain 138.