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Api Endpoint

L2 Chain Health & RPC Latency Oracle (Phoenix Zero L2 Health Oracle)

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 (Base and Arbitrum via eth_getBlockReceipts), gas pressure, and execution recommendation.

Open interactive test console

Offering

Provider
rtt.phoenix-ai.work
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Blockchain And Crypto
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://rtt.phoenix-ai.work/api/v1/health
MIME type
Not provided
First seen
2026-10-16T01:50:10.647Z
Last seen
Tags
chain-health, RPC, latency, Gas, stall, Base, Arbitrum, oracle, l2, sequencer, Health, ebpf, revert-ratio, 12-chain

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.01 USDC
Atomic price: 10000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 3
0.01 USDC
Atomic price: 10000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0xbb967F16C7f3e9B4c1626680684445d41dBE44Ab"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "10000",
    "payTo": "0xbb967F16C7f3e9B4c1626680684445d41dBE44Ab"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "10000",
    "payTo": "0xbb967F16C7f3e9B4c1626680684445d41dBE44Ab"
  }
]

Observed health

Status
Healthy
Latest latency
158 ms
Average latency
234 ms
HTTP status
402
Last checked
Reachability
100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {}
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$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"
}