Gas Fees

Estimates EIP-1559 transaction fees on Base, Ethereum, Optimism, and Arbitrum.

Overview

Estimates EIP-1559 transaction fees on Base, Ethereum, Optimism, and Arbitrum. Returns base fee, priority-fee tiers, maxFeePerGas, and USD cost estimates for common transactions. Use it as a gas fees API or multi-chain gas tracker.

Endpoint

Method	Endpoint	Price	Description
POST	/v1/marketplace/api/gas-fees	$0.023	Invoke Gas Fees (General) and return the upstream response.

How to call it

Requests are paid per call over the x402 protocol. Call the endpoint, receive a 402 Payment Required quote, then repeat the request with the signed payment header. The SDKs do both steps for you.

# 1. Ask for a quote
curl -i -X POST https://api.jarvisclaw.ai/v1/marketplace/api/gas-fees \
  -H 'Content-Type: application/json' \
  -d '{}'

# 2. Pay it (the SDK signs and retries for you)
curl -X POST https://api.jarvisclaw.ai/v1/marketplace/api/gas-fees \
  -H 'Content-Type: application/json' \
  -H 'X-PAYMENT: <signed-payload>' \
  -d '{}'

Open in the marketplace