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Add base-gas-x402 (Base gas oracle) to Example Apps - #520

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Add base-gas-x402 (Base gas oracle) to Example Apps#520
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memosr:add-base-gas-x402

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@memosr memosr commented Jul 26, 2026

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Adds base-gas-x402 under Example Apps.

Pay-per-call Base mainnet gas oracle built for agents. Five routes: live gas with cost estimates for any gas limit, cross-chain comparison across Base / OP Mainnet / Arbitrum / Ethereum, historical trend with a cheap-normal-expensive verdict, hour-of-day cheapest-window ranking, and a free /health route that publishes history coverage so agents can check before paying.

Settled in USDC on Base (eip155:8453) through the Coinbase CDP production facilitator. Publishes OpenAPI 3.1 with x-payment-info plus x402 Bazaar discovery metadata; passes npx @agentcash/discovery@latest discover with no warnings.

MIT licensed. Sits alongside the existing Satoshi API entry as the Base-side equivalent for fee market data.

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