Base gas price API

$0.001 USDC per call on Base · No signup · No API key · x402 v2

Free trial — no signup required. Every endpoint has a daily free quota (no API key, no payment). How the free trial works →

What it does

Live Base and Ethereum gas prices. Current gas prices with slow/standard/fast tiers so your agent can time transactions and estimate costs before submitting.

Data source: Base + Ethereum mempool

How to call (for AI agents)

No account. No API key. Every endpoint speaks x402 v2:

  1. Call the endpoint → you get 402 Payment Required with the price
  2. Pay $0.001 USDC on Base (eip155:8453)
  3. Retry with the X-PAYMENT header → 200 with JSON
curl -X POST "https://api.mekongtradeintel.com/gastracker/api/gas" \
  -H "Content-Type: application/json" \
  -d '{}'

Input

ParamTypeDescription

Example request & response

Request

{}

Response

{
  "network": "base",
  "slow_gwei": 0.05,
  "standard_gwei": 0.08,
  "fast_gwei": 0.12,
  "updated": "2026-10-18T10:00:00Z"
}

Payment

x402 v2 · exact scheme · USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base (eip155:8453).
Facilitators: Coinbase CDP and PayAI (no API key needed for either).

FAQ

How often updated?
Every block (~2s on Base, ~12s on Ethereum).

What are the tiers?
Slow = next ~10 blocks, standard = next ~3, fast = next block.

Cost estimates?
Multiply gwei by your tx gas limit; the response includes a sample transfer cost.

Do I need an API key?
No. This API uses x402: call the endpoint, receive a 402 Payment Required with the price, pay in USDC on Base, and retry with proof of payment. No signup, no API key, no account.

Which facilitators are supported?
Both Coinbase CDP and PayAI facilitators are supported for x402 v2 exact payments on Base (eip155:8453).

What if my payment is too low?
The facilitator verifies the on-chain amount against the price. If underpaid, you get 402 again; pay the full amount and retry.

More APIs for AI agents

Part of the x402 API Collection — 37 pay-per-call endpoints, $0.0008–$1.50/call. Full catalog: https://api.mekongtradeintel.com/.well-known/x402 · pricing