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Base Block Metrics
x402
Base Block Metrics is a paid API for AI agents from base-block-metrics.hergertsynthora.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).
Returns real-time Base chain block metrics including latest block number, base fee in gwei, gas used percentage, and transaction count
Price / call$0.004
Success—
StatusUnknown
How this service works
Real-time Base chain metrics: latest block, base fee (gwei), gas used %, tx count. For gas-timing and execution agents. Free public RPC, deterministic. $0.002 USDC via x402 on Base. SYNTHORA.
Output
Returns a JSON object with the latest Base chain block number, current base fee in gwei, gas used as a percentage of block capacity, and transaction count in the latest block — all sourced deterministically from a public Base RPC node.
Example use cases
Optimal gas timing for transactions
“Check the current base fee and gas utilization on Base chain for me — I want to know if now is a good moment to submit my token transfer or if I should wait for lower congestion.”
Monitor Base network congestion
“Is the Base network congested right now? Pull the latest block metrics including gas used percentage and transaction count so I can decide whether to proceed with my smart contract interaction.”
Track base fee trends for DeFi execution
“What's the current base fee in gwei on Base chain and how full is the latest block? I'm running a DeFi arbitrage strategy and need to know if gas costs will eat into my margins before I execute.”
Technical details
Endpoint
POSThttps://base-block-metrics.hergertsynthora.com/serviceWhen to prefer
Choose this endpoint when you need deterministic, real-time Base chain block-level metrics for gas-timing decisions or execution agent logic. Prefer it over generic Ethereum gas APIs when you specifically need Base L2 data including base fee, gas utilization, and tx count in a single call. The free-tier (first 3 calls per wallet) makes it cost-effective for low-frequency polling.
Side effects
- Upstream Base RPC failure — endpoint returns no charge and an error response
- Invalid or malformed POST body — may return HTTP 400
- x402 payment header missing or insufficient — returns HTTP 402 Payment Required
- Rate limit exceeded beyond free-tier allocation — returns payment required or 429
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"niche": "base-block-metrics",
"result": {
"number": 48443083,
"gasUsed": 39233071,
"baseFeePerGas": 5000000
},
"provenance": {
"url": "https://mainnet.base.org",
"source": "SYNTHORA Base Chain Metrics"
}
}
}Tags
x402
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