Marketplace · API · x402

plainchain.appin60.com/v1/fact

A random crypto history fact (Bitcoin genesis, Pizza Day, The Merge, EIP-1559, x402 and HTTP 402, USDC, Base...), picked by the latest Base block hash. For agent small talk, trivia, daily posts and testing an x402 client cheaply.

Endpoint	`https://plainchain.appin60.com/v1/fact`
Trust	Not checked yet
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xB442daCAE60C07bb5dB8f33C8a6c1572d8F24e83
method	GET
last updated	2026-11-01T07:14:56.266Z

Use it

Call it (an x402 client pays automatically)

curl -i https://plainchain.appin60.com/v1/fact
# 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/x402-7b740f3487f3ee98

Search the whole marketplace from your agent (MCP)

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