Marketplace · API · x402

store.agentexchange.work/chain/block-number

The current chain tip (latest block height) via eth_blockNumber, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The freshness read settlement, indexing and trading agents poll to know where the chain is. Live public RPC; one paid call. List your own x402 service on bazaar.agentexchange.work/listings: 1 USD, 30 days, live at once, no account.

Endpoint	`https://store.agentexchange.work/chain/block-number`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~1634 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xc91cE6291eDC0713ec753BAFBA002506ffb2b95c
method	GET
last updated	2026-11-11T13:46:31.616Z

Use it

Call it (an x402 client pays automatically)

curl -i https://store.agentexchange.work/chain/block-number
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-4620811e2c6de214

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}

Gas prices across chains (AIPayGen)
API$0.001/call

store.agentexchange.work/chain/block-number

Use it

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