Parameters1
| Parameter | Type | Default | Example |
|---|---|---|---|
chain | string | null | base |
Service overview
Gas oracle / gas price API / EIP-1559 fee estimator / Base + Ethereum + Optimism + Arbitrum + Polygon gas tracker / etherscan-gas alternative / pre-tx cost estimator / USD gas-cost calculator / safe-low + standard + fast tier feed. Reads the chain's latest block, derives the EIP-1559 base fee, suggests priority fees for safe-low / standard / fast tiers, computes the total recommended maxFeePerGas, and converts cost to USD for common tx types (transfer, ERC-20 transfer, Uniswap swap, NFT mint).
Level up your agent by giving it access to thousands of services. All payable per-request via x402. No API keys, no accounts.
Paste into your agentic chat and let your agent guide you.
npx awal x402 pay "https://x402.agentutility.ai/gas-now-base" \
--method POST \
--data '{
"chain": "{chain}"
}'{
"endpoint": "POST /gas-now-base",
"paid": true,
"query": "integrate x^2",
"result": "x^3 / 3 + C"
}API surface
7 crawlable routes
| Parameter | Type | Default | Example |
|---|---|---|---|
chain | string | null | base |
| Parameter | Type | Default | Example |
|---|---|---|---|
height | number | null | 1024 |
prompt | string | null | A neon-lit cyberpunk street scene, dramatic lighting, photorealistic |
tier | string | null | fast |
width | number | null | 1024 |
| Parameter | Type | Default | Example |
|---|---|---|---|
expression | string | null | 0 9 * * 1-5 |
timezone | string | null | America/New_York |
| Parameter | Type | Default | Example |
|---|---|---|---|
cve_id | string | null | CVE-2021-44228 |
| Parameter | Type | Default | Example |
|---|---|---|---|
series_ids | array | null | [] |
start_year | string | null | 2023 |
| Parameter | Type | Default | Example |
|---|---|---|---|
domain | string | null | example.com |
types | array | null | [] |
| Parameter | Type | Default | Example |
|---|---|---|---|
query | string | null | Germany |
FAQ
Service
OATP · tx_explainer — Fetch a Solana transaction by signature and return a human-readable explanation: programs invoked, token balance changes, fee (SOL + USD), and a one-line summary.
Service
Exa /contents endpoint
Service
Decode and explain any EVM blockchain transaction across 11 chains (Base, Ethereum, Arbitrum, Optimism, Avalanche, Polygon, Mantle, Monad, Plasma, BSC, Hyperliquid). Get a human-readable summary of swaps, transfers, approvals, DeFi interactions, and more.