AgenticFi Block Height Lookup

x402

AgenticFi Block Height Lookup is a paid API for AI agents from defi-api.agenticfi.wtf, paid per call via x402, $0.001/call, not verified (last probed 2026-10-28); live alternatives: Codex GraphQL API ($0.001) and ChainRay NFT Token Metadata Lookup ($0.001).

Agents call it through Zero, which pays per call: no API key and no wallet of your own. New accounts start with $5. Live alternatives for the same use case: Codex GraphQL API ($0.001) · ChainRay NFT Token Metadata Lookup ($0.001).

Returns the current block height for a specified blockchain network (e.g. Ethereum, Base, Arbitrum)

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

Latest block number for a chain

Output

Returns the current block height (a numeric block index) for the specified blockchain network, indicating how many blocks have been mined since genesis on that chain.

Example use cases

Monitor swap execution timing across chains

“Before executing my next batch of swaps, check the current block heights on Ethereum, Base, and Arbitrum so I can timestamp each transaction properly.”

Verify on-chain state synchronization checkpoint

“I need to make sure my agent is synced with the latest block on Base before reading any wallet balances or token prices from the chain.”

Anchor DeFi workflow to current block state

“What's the block height on Ethereum right now? I want to use that as a reference point before submitting any pending transactions.”

Technical details

Endpoint

GEThttps://defi-api.agenticfi.wtf/api/chain/block-height/%7Bchain%7D?utm_source=zero.xyz

When to prefer

Use this endpoint when an AI agent needs to anchor on-chain state, verify timing of transactions, or synchronize workflows to a specific block number on EVM-compatible chains like Ethereum, Base, or Arbitrum. Ideal for DeFi automation that requires knowing the current chain height before executing swaps or reading on-chain data.

Side effects

Invalid chain name returns 400 or error response
Unsupported chain identifier results in no data
Network connectivity issues to on-chain RPC can cause timeouts
Payment not processed results in 402 response requiring USDC micropayment on Base via x402

Input

{
  "input": {
    "type": "http",
    "method": "GET",
    "pathParams": {
      "chain": "base"
    },
    "queryParams": {
      "chain": "base"
    }
  }
}

Schema · Request body

Field	Type	Description
inputrequired	object

Output

{
  "chain": "base",
  "timestamp": 1781239193847,
  "blockNumber": 47224923
}

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