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chainsscope.duckdns.org tools fee-estimate
https://chainsscope.duckdns.org/tools/fee-estimate
payable
Current network fee conditions -- gas price (ETH/Base/Arbitrum/Optimism/Polygon), sat/vB fee tiers (Bitcoin), or recent prioritization fees (Solana) -- useful for an agent about to construct a transaction itself.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 672 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-08-10T09:09:50.506Z (1d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fchainsscope.duckdns.org%2Ftools%2Ffee-estimate"