# booAIP Multi-Chain Gas Price Checker

> booAIP Multi-Chain Gas Price Checker is a paid API for AI agents from booaip.vercel.app, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-14).

Returns current gas prices in gwei for Ethereum, BNB Chain, and Base simultaneously, identifying the cheapest chain

## Facts

- Endpoint: GET https://booaip.vercel.app/api/gas-multi
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/booaip-multi-chain-gas-price-checker-1af2fe58
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sjNjxD2VJlSitHSJ63Gny

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability booaip-multi-chain-gas-price-checker-1af2fe58
```

Example prompt: Check gas prices across Ethereum, BNB Chain, and Base right now and tell me which one is cheapest to transact on.

## When to prefer this

Prefer this endpoint when you need to compare gas prices across Ethereum, BNB Chain, and Base simultaneously in a single call, rather than making separate per-chain requests. Ideal for agents that need to route transactions or DeFi operations to the cheapest available EVM chain at the moment of execution.

## Known failure modes

- Invalid chain name in array returns error or omits that chain
- RPC node unavailability may cause stale or missing gas data for one chain
- Empty chains array may default to all three or return empty result
- Network timeout if on-chain reads are slow
- Malformed JSON response if upstream RPC is degraded

## How this service works

Pay-per-call crypto/web3 data for AI agents. USDC via x402 on Base.

## Output

A JSON object containing the count of chains checked, an array of each chain's current gas price in gwei, and the name of the cheapest chain (e.g. {count:3, chains:[{chain:'base',gasPriceGwei:0.05},...], cheapestChain:'base'}).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chains": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "description": "Chains to check: eth, bnb, base. Defaults to all three."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 3,
  "chains": [
   {
    "chain": "base",
    "gasPriceGwei": 0.05
   }
  ],
  "cheapestChain": "base"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/booaip-multi-chain-gas-price-checker-1af2fe58/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from booaip.vercel.app](https://www.zero.xyz/host/booaip.vercel.app/llms.txt)