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Chain Status

by Otto AI in Onchain & crypto

x402 APIPassing, checked 4 h ago

Base chain status from Otto's configured RPC: latest, safe, finalized and pending heads with validated mined block hashes; pending hash nullable and provisional. Public source ID, per-head observation times and retrieval window disclose non-atomic RPC reads. Base fee, congestion, finality lag and block age at observation, separate from cache staleness. Refreshed every minute. $0.001 per call.

GET https://x402.ottoai.services/chain-status

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
91 ms typical, 91 ms slowest 5%
Last check
4 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://x402.ottoai.services/chain-status"
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402.ottoai.services%2Fchain-status
const res = await pay("https://x402.ottoai.services/chain-status");
console.log(await res.json());

Example input

{}

Example output

{
  "data": {
    "blockAgeNote": "blockAgeSec is latest block age at latest.observedAt (seconds, floored and clamped to zero), not age...",
    "blockAgeSec": 3,
    "chain": "base",
    "chainId": 8453,
    "congestion": "low",
    "finalityLagBlocks": 474,
    "finalityLagSec": 948,
    "finalityNote": "Base is an OP-Stack L2: ~2s soft-confirmed blocks (latest), L2-safe once the sequencer batch is subm...",
    "finalized": {
      "baseFeePerGasGwei": 0.005,
      "baseFeePerGasWei": "5000000",
      "blockHash": "0x3333333333333333333333333333333333333333333333333333333333333333",
      "blockNumber": 50738081,
      "blockTimeIso": "2026-09-01T11:45:09.000Z",
      "blockTimestamp": 1788263109,
      "gasUsedRatio": 0.0825,
      "observedAt": "2026-09-01T12:01:00.200Z"
    },
    "generatedAt": "2026-09-01T12:01:00.400Z",
    "latest": {
      "baseFeePerGasGwei": 0.005,
      "baseFeePerGasWei": "5000000",
      "blockHash": "0x1111111111111111111111111111111111111111111111111111111111111111",
      "blockNumber": 50738555,
      "blockTimeIso": "2026-09-01T12:00:57.000Z",
      "blockTimestamp": 1788264057,
      "gasUsedRatio": 0.1088,
      "observedAt": "2026-09-01T12:01:00.000Z"
    },
    "pending": {
      "baseFeePerGasGwei": 0.005,
      "baseFeePerGasWei": "5000000",
      "blockHash": null,
      "blockNumber": 50738556,
      "blockTimeIso": "2026-09-01T12:00:59.000Z",
      "blockTimestamp": 1788264059,
      "gasUsedRatio": 0.0413,
      "hashStatus": "provisional",
      "note": "In-progress head; blockHash may be null or provisional and is never a finalized hash. An absent, mal...",
      "observedAt": "2026-09-01T12:01:00.300Z"
    },
    "pendingLeadBlocks": 1,
    "provenance": {
      "note": "Separate eth_getBlockByNumber calls, not an atomic snapshot or independent finality verification. Ea...",
      "observationMode": "non-atomic-rpc",
      "retrievalStartedAt": "2026-09-01T12:00:59.900Z",
      "retrievedAt": "2026-09-01T12:01:00.300Z",
      "sourceId": "base-mainnet-public-rpc"
    },
    "safe": {
      "baseFeePerGasGwei": 0.005,
      "baseFeePerGasWei": "5000000",
      "blockHash": "0x2222222222222222222222222222222222222222222222222222222222222222",
      "blockNumber": 50738532,
      "blockTimeIso": "2026-09-01T12:00:11.000Z",
      "blockTimestamp": 1788264011,
      "gasUsedRatio": 0.1893,
      "observedAt": "2026-09-01T12:01:00.100Z"
    }
  },
  "meta": {
    "degraded": false,
    "generatedAt": "",
    "stalenessSec": 0,
    "validUntil": ""
  },
  "status": "success"
}

Security scan

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Recent checks

WhenResultHTTPTimePrice
4 h agoPassed40291 ms$0.001