Which Base public RPCs serve a stale chain tip

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xD617a7145ca56E3ed58d639F9DEC6999B22441eE",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "rpc": "https://mainnet.base.org"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "endpoints": [
            {
              "behind_1plus_rate": 0.03,
              "error": 2,
              "error_rate": 0.0007,
              "height_behind": {
                "max": 2,
                "p50": 0,
                "p90": 0,
                "p99": 1,
                "samples": 2878
              },
              "latency_ms": {
                "max": 5053,
                "p50": 88,
                "p90": 135,
                "p99": 232,
                "samples": 2878
              },
              "ok": 2878,
              "probes": 2880,
              "rpc": "https://base-rpc.publicnode.com",
              "stale": 0
            }
          ],
          "network": "eip155:8453",
          "schema": "rpchealth/v1",
          "updated_at": 1719500000,
          "window": {
            "endpoints_compared": 10,
            "hours": 24,
            "probe_interval_s": 30,
            "probe_rounds": 2880
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "description": "Which Base RPC endpoints are serving a stale chain tip right now. Every 30s we ask all major public RPCs for eth_blockNumber in parallel (same instant) and record how many blocks behind the fastest peer each one was, plus latency and error rate. Omit ?rpc for the full map; pass ?rpc=<url|hostname> to look up one endpoint. Measurements only, no recommendation.",
              "properties": {
                "rpc": {
                  "description": "optional: RPC url or hostname to look up (omit for the full map)",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://x402.dailyelo.com/v1/rpc/health"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://x402.dailyelo.com/v1/rpc/health");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://x402.dailyelo.com/v1/rpc/health")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header