rpc-radar

Inspect, benchmark, and continuously monitor EVM-compatible RPC endpoints. Detects chain ID, measures latency, checks supported methods, and assigns a health score — useful for selecting reliable public RPCs or auditing private node performance.

Quick Scan

# Single endpoint
rpc-radar scan https://eth.llamarpc.com

# Multiple endpoints from file
rpc-radar scan --file endpoints.txt

# Output as JSON
rpc-radar scan https://mainnet.infura.io/v3/KEY --json

What It Checks

Check	Method	Pass Condition
Chain ID	eth_chainId	Returns expected chain
Block height	eth_blockNumber	Non-zero, synced
Latency	timed request	< 500ms = good
Batch support	batch JSON-RPC	Response array
Archive depth	eth_getBalance (old block)	Returns value
Filter support	eth_newFilter	No error
WebSocket	ws:// upgrade	Handshake success

Benchmark Mode

# 100 requests, measure p50/p95/p99
rpc-radar bench https://eth.llamarpc.com --requests 100

# Compare two endpoints
rpc-radar compare https://eth.llamarpc.com https://rpc.ankr.com/eth

Monitor Mode (continuous)

# Poll every 30s, alert if latency > 1000ms or block falls behind
rpc-radar monitor https://eth.llamarpc.com --interval 30 --alert-latency 1000

# Monitor multiple and export to CSV
rpc-radar monitor --file endpoints.txt --output monitor.csv

Health Score

Each endpoint gets a 0–100 score:

• Latency (40 pts): < 200ms = 40, < 500ms = 20, > 500ms = 0
• Uptime (30 pts): based on consecutive successful checks
• Block sync (20 pts): within 2 blocks of best known
• Method support (10 pts): supports batch + filters + archive

Supported Chains

Auto-detected by chain ID: Ethereum, Polygon, BSC, Arbitrum, Optimism, Avalanche, Base, Fantom, and any other EVM-compatible chain.

Output Example

Endpoint: https://eth.llamarpc.com
Chain: Ethereum Mainnet (1)
Block: 19,845,231 ✅
Latency: 87ms ✅
Batch: supported ✅
Archive: supported ✅
Health Score: 94/100 🟢