L2 Intelligence API

Real-time Layer 2 Fee Oracle + Sequencer Health Monitor

Supported L2 Chains

Chain	Symbol	Type	Data Source
Arbitrum	ARB	Optimistic Rollup	RPC + Etherscan
Base	BASE	Optimistic Rollup	RPC
Optimism	OP	Optimistic Rollup	RPC
zkSync Era	ZK	ZK Rollup	RPC
Linea	LINEA	ZK Rollup	RPC + Etherscan
Scroll	SCR	ZK Rollup	RPC
Mantle	MNT	Optimistic Rollup	RPC
Blast	BLAST	Optimistic Rollup	RPC

Endpoints

Method	Endpoint	Description	Auth
GET	`/api/v2/l2/cheapest`	Get cheapest L2 with full ranking	No
GET	`/api/v2/l2/health`	Sequencer health status all L2s	No
GET	`/api/v2/l2/status/{chain}`	Single chain details	No
GET	`/api/v2/l2/all`	All L2 chains data	No

Example: Get Cheapest L2

curl https://feedoracle.io/api/v2/l2/cheapest

{
  "recommended": "Scroll",
  "gas_usd": 0.000008,
  "eth_price": 3210,
  "ranking": [
    {"chain": "Scroll", "gas_usd": 0.000008, "health": "HEALTHY"},
    {"chain": "Blast", "gas_usd": 0.000067, "health": "HEALTHY"},
    {"chain": "Optimism", "gas_usd": 0.000068, "health": "HEALTHY"},
    ...
  ]
}

Health Status

Status	Block Age	Meaning
HEALTHY	< 30 sec	Sequencer operating normally
DEGRADED	30-120 sec	Sequencer slow, monitor closely
DOWN	> 120 sec	Sequencer likely offline

Use Cases

DeFi Routing: Route transactions to cheapest L2
Risk Management: Monitor sequencer health before large transactions
Cost Optimization: Compare gas costs across L2s in real-time

Data refreshed every request. Not financial advice.