# Multichain RPC Gas Price

> Multichain RPC Gas Price is a paid API for AI agents from multichain-rpc.clankerceo.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns live EIP-1559 gas prices (base fee, low/medium/high priority tiers in gwei) and estimated simple transfer cost for a specified EVM chain.

## Facts

- Endpoint: GET https://multichain-rpc.clankerceo.workers.dev/gas-price
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/multichain-rpc-gas-price-0021337d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZrT6rRw5IH4XGgSWtCxHw

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 multichain-rpc-gas-price-0021337d
```

Example prompt: What are the current gas prices on Base right now — give me the EIP-1559 base fee and the low, medium, and high priority tiers in gwei, plus what a simple ETH transfer would cost?

## When to prefer this

Use this endpoint when an agent needs real-time EVM gas prices across Base, Polygon, Arbitrum, Optimism, or Ethereum mainnet, especially when estimating transaction costs before submission or monitoring for gas spikes. Prefer this over on-chain RPC calls when you need a cheap, metered, per-call priced lookup without managing your own RPC node credentials.

## Known failure modes

- Unsupported or misspelled chain name returns an error or empty response
- Chain parameter omitted may default to a single chain or return an error
- RPC backend congestion may cause stale or delayed gas data
- Cloudflare Worker cold start may add latency on first call
- Rapid gas market movements mean data may be slightly outdated by the time the agent acts on it

## How this service works

Cheap, factual EVM chain lookups priced per call in USDC. Base, Polygon, Arbitrum, Optimism and Ethereum.

## Output

A JSON object containing the chain name, current EIP-1559 base fee in gwei, blended gas price in gwei, and a simple_transfer_cost object with the gas units (21000), the estimated cost as a decimal string, and the native token symbol (e.g. ETH).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "enum": [
      "http"
     ],
     "type": "string"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "chain": {
       "type": "string"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "enum": [
      "json"
     ],
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": "base",
  "base_fee_gwei": 0.01,
  "gas_price_gwei": 0.011,
  "simple_transfer_cost": {
   "gas": 21000,
   "amount": "0.0000002",
   "symbol": "ETH"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/multichain-rpc-gas-price-0021337d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from multichain-rpc.clankerceo.workers.dev](https://www.zero.xyz/host/multichain-rpc.clankerceo.workers.dev/llms.txt)