# Aether Base Gas Price Lookup

> Aether Base Gas Price Lookup is a paid API for AI agents from aether-x402.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).

Returns current Base network gas fee estimates including base fee, max fee, and priority fee in Gwei.

## Facts

- Endpoint: POST https://aether-x402.vercel.app/v1/base/gas?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/aether-base-gas-price-lookup-c42df100
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_awcJq4BR7Nws7KqBq_q83

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 aether-base-gas-price-lookup-c42df100 -d '<json body>'
```

Example prompt: What are the current gas fees on Base — give me the base fee, max fee, and priority fee in Gwei so I can decide whether to submit my transaction now.

## When to prefer this

Choose this endpoint when you need real-time EIP-1559 gas fee estimates specifically for the Base L2 network and are comfortable paying micro-fees via x402 (USDC on Base). Prefer this over free gas APIs when you need reliable, pay-per-call access without API key management, or when already operating within the x402 payment ecosystem on Base.

## Known failure modes

- Payment not received or insufficient USDC balance via x402 — returns 402 Payment Required
- Base RPC node unavailable — may return 503 or timeout
- Malformed request body — returns 400 Bad Request
- Rate limiting or quota exceeded — returns 429

## How this service works

Pay-per-call Base onchain data, token risk verdicts and x402 payability audits over x402 (USDC on Base).

## Output

Returns a JSON object with three fields: baseFeeGwei (current base fee per gas in Gwei), maxFeeGwei (recommended max fee per gas in Gwei), and maxPriorityFeeGwei (recommended miner/validator tip in Gwei). These correspond to EIP-1559 gas parameters for the Base L2 network.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [],
     "properties": {},
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "maxFeeGwei": "0.011",
  "baseFeeGwei": "0.005",
  "maxPriorityFeeGwei": "0.001"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/aether-base-gas-price-lookup-c42df100/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aether-x402.vercel.app](https://www.zero.xyz/host/aether-x402.vercel.app/llms.txt)