Real-time L2 sequencer health across 12 chains (Base, Arbitrum, Optimism, zkSync
Real-time L2 sequencer health across 12 chains (Base, Arbitrum, Optimism, zkSync, Blast, Linea, Mantle, Mode, Scroll, Taiko, Polygon zkEVM, Casper). Returns kernel-level P99/P95 RTT from eBPF probes, revert ratios, gas pressure, and execution recommendation.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
265 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://rtt.phoenix-ai.work/api/v1/health
| Category | Code and developer |
|---|---|
| Provider host | rtt.phoenix-ai.work |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.01 | 265 ms |
Example input (from the provider)
{
"method": "GET",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"arb_revert_ratio": {
"description": "Fraction of reverted txs on Arbitrum (0.0-1.0)",
"type": "number"
},
"base_revert_ratio": {
"description": "Fraction of reverted txs on Base (0.0-1.0)",
"type": "number"
},
"blob_base_fee": {
"description": "EIP-4844 blob base fee",
"type": "number"
},
"chains": {
"description": "Per-chain P99/P95 RTT in ms, stall flag, last-updated unix timestamp. Chains: base, arbitrum, optimism, zksync, blast, linea, mantle, mode, scroll, taiko, polygon_zkevm, casper",
"type": "object"
},
"gas_pressure": {
"description": "L1 gas price in gwei",
"type": "number"
},
"recommendation": {
"enum": [
"SAFE_TO_EXECUTE",
"ELEVATED_RISK",
"HIGH_RISK",
"STALL_DETECTED"
],
"type": "string"
},
"timestamp": {
"description": "ISO 8601 UTC timestamp",
"type": "string"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}