fee_estimate
chainsscope.duckdns.org · 2 paid endpoints · listed 2026-10-27
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.
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| POST | chainsscope.duckdns.org/tools/fee-estimate Current network fee conditions -- gas price (ETH/Base/Arbitrum/Optimism/Polygon), sat/vB fee tiers (Bitcoin), or recent prioritization fees (Solana) -- useful f | $0.01 | Base, Solana |
| POST | chainsscope.duckdns.org/tools/address-activity Recent transaction history for an address, normalized across Ethereum, Base, Arbitrum, Optimism, Polygon, Bitcoin, and Solana -- direction, counterparty, and va | $0.015 | Base, Solana |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| 5 days ago | chainsscope.duckdns.org/tools/address-activity | 402 | 414 | valid x402 v2 terms |
Income on Base (7 days)
| Day | Transfers | USDC | |
|---|---|---|---|
| 2026-10-31 | 2 | $0.02 | |
| 2026-10-30 | 5 | $0.08 | |
| 2026-10-29 | 1 | $0.01 | |
| 2026-10-28 | 6 | $0.09 | |
| 2026-10-27 | 2 | $0.02 |
Is this your API?
<a href="https://logicnodes.io/observatory/p/chainsscope.duckdns.org"><img src="https://logicnodes.io/observatory/badge/chainsscope.duckdns.org.svg" alt="x402 status"></a>
Claim it for free with
x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/chainsscope.duckdns.org