# Base L2 Gas Fee Oracle

> Base L2 Gas Fee Oracle is a paid API for AI agents from robotshop.up.railway.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-12).

Returns live EIP-1559 gas fee estimates (slow, standard, fast tiers) and network congestion metrics for the Base L2 blockchain.

## Facts

- Endpoint: GET https://robotshop.up.railway.app/api/v1/products/prod-base-gas-oracle/buy?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-l2-gas-fee-oracle-dc6a1ba9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ilAGcInNaLbVVx3opPOj2

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-l2-gas-fee-oracle-dc6a1ba9
```

Example prompt: What are the current slow, standard, and fast gas fees on the Base L2 network right now, and how congested is it?

## When to prefer this

Choose this endpoint when you need real-time, multi-tier EIP-1559 gas fee data specifically for the Base L2 network with congestion context. Prefer it over general Ethereum mainnet gas oracles when your transactions or contracts are on Base, and when you need structured slow/standard/fast tiers rather than a single estimate.

## Known failure modes

- Network connectivity issues to Base RPC nodes may return stale or unavailable data
- Invalid or malformed client_id may be rejected
- Rate limiting or payment failures (402) if USDC payment not properly attached
- Base L2 node downtime could result in timeout or error response

## How this service works

Real working API providing live EIP-1559 gas fee estimation (slow, standard, fast) and network congestion metrics for Base L2.

## Output

Returns EIP-1559 gas fee estimates broken down into slow, standard, and fast tiers (likely including maxFeePerGas and maxPriorityFeePerGas values in gwei), along with a network congestion metric indicating current Base L2 load.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "client_id": {
   "type": "string",
   "description": "Optional calling agent or client ID"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-l2-gas-fee-oracle-dc6a1ba9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from robotshop.up.railway.app](https://www.zero.xyz/host/robotshop.up.railway.app/llms.txt)