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EVM Chain Health Probe
x402
EVM Chain Health Probe is a paid API for AI agents from meryol-agenticmarket-x402.hf.space, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).
Queries 3 public RPCs in parallel for a given EVM chain and returns median block number, RPC lag, head age, latency, and a 0-100 health score
Price / call$0.001
Success—
StatusUnknown
How this service works
Checks the health status of a specified blockchain network.
Output
Returns a JSON object with a 0-100 health score, median block number across 3 RPCs, max lag between RPCs (in blocks), head age (seconds since last block), per-RPC latency, and healthy RPC count — giving a complete picture of chain readiness.
Example use cases
Example prompt
“Before I send this batch of transactions, can you run a liveness check on Base and tell me the health score, block lag between RPCs, and how fresh the chain head is?”
Technical details
Endpoint
GEThttps://meryol-agenticmarket-x402.hf.space/chain/health/:chain?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs to verify chain liveness and RPC consensus before timing a transaction burst, switching RPC providers, or executing any latency-sensitive on-chain operation. Prefer over generic block explorers when you need a quantitative health score and multi-RPC lag comparison in a single call.
Side effects
- Unsupported chain name returns a 400 or validation error — only ethereum, base, arbitrum, optimism are valid
- All 3 RPCs unresponsive returns a low health score with healthy_rpc_count=0
- High lag between RPCs may indicate a chain fork or indexing delay rather than full outage
- Payment not included or invalid returns a 402 response before any chain data is fetched
Input
{
"input": {
"type": "http",
"method": "GET",
"pathParams": {
"chain": "ethereum"
},
"queryParams": {}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"rpcs": [
{
"rpc": "https://ethereum-rpc.publicnode.com",
"error": null,
"block_ts": 1781759639,
"latency_ms": 42,
"block_number": 25342288
},
{
"rpc": "https://eth.drpc.org",
"error": null,
"block_ts": 1781759639,
"latency_ms": 84,
"block_number": 25342288
},
{
"rpc": "https://1rpc.io/eth",
"error": null,
"block_ts": 1781759639,
"latency_ms": 228,
"block_number": 25342288
},
{
"rpc": "https://cloudflare-eth.com",
"error": null,
"block_ts": 0,
"latency_ms": 102,
"block_number": 0
}
],
"chain": "ethereum",
"notes": [
"rpc_divergence_25342288_blocks"
],
"head_age_s": 13,
"score_0_100": 80,
"max_lag_blocks": 25342288,
"total_rpc_count": 4,
"healthy_rpc_count": 4,
"median_block_number": 25342288
}Tags
x402
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