# Base Gas Price & Transfer Cost Estimator

> Base Gas Price & Transfer Cost Estimator is a paid API for AI agents from quartermaster.surewhynot.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Returns current Base network gas prices and a simple ETH transfer cost estimate for transaction planning.

## Facts

- Endpoint: GET https://quartermaster.surewhynot.app/v1/gas
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-gas-price-transfer-cost-estimator-91c2ce42
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZUeg6oppi-6u7XRsmgM37

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 base-gas-price-transfer-cost-estimator-91c2ce42
```

Example prompt: What are the current gas prices on Base, and how much would a simple ETH transfer cost right now?

## When to prefer this

Use this endpoint when an agent needs to check current Base L2 gas conditions before executing or recommending a blockchain transaction — especially when cost-awareness is required for x402 payment flows, DeFi operations, or wallet UX. Prefer over generic Ethereum mainnet gas tools when the target chain is specifically Base.

## Known failure modes

- Base RPC unavailable — upstream node error, may return 5xx
- Stale gas data if Base network is experiencing congestion or reorg
- No query parameters supported; any unexpected params ignored
- Rate limiting if called excessively without payment

## How this service works

Current Base gas prices and a simple-transfer cost estimate for transaction planning.

## Output

Returns current Base network gas price levels (e.g. slow/standard/fast in gwei) and an estimated cost in ETH or USDC for executing a simple token transfer, helping agents decide whether to proceed with a transaction or wait for lower fees.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-gas-price-transfer-cost-estimator-91c2ce42/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quartermaster.surewhynot.app](https://www.zero.xyz/host/quartermaster.surewhynot.app/llms.txt)