Data
OneSource
onesource.io
RPC API for Ethereum mainnet and Sepolia, with 25 pay-per-call endpoints (blocks, balances, transactions, receipts, event logs, ENS, contracts, NFTs) payable in USDC on Base via x402, with no API key.
Back to service marketHTTP x402 online test
Send an unpaid request using the provider's template and inspect the 402 payment requirements returned by the service.
GET
https://api.onesource.io/api/chain/block-number
Service tags
ethereum
sepolia
blocks
balances
Service information
- Provider
- onesource.io
- Category
- Data
- Uptime (30 days)
- 100%
- Avg response time (30 days)
- 963 ms
- Information updated
- Aug 15, 2026
Payment details
Option 1
exact
eip155:8453
- Atomic amount
- 1000
- Payment timeout
- 3600 seconds
- Asset
- USD Coin · 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
- Recipient
- 0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea
Option 2
batch-settlement
eip155:8453
- Atomic amount
- 1000
- Payment timeout
- 3600 seconds
- Asset
- USD Coin · 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
- Recipient
- 0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea