Marketplace · API · x402

api.duoleads.com/v1/chain/address

Crypto address validator: identify which blockchain an address belongs to and validate its encoding: EVM EIP-55 checksum, Bitcoin base58check and bech32/bech32m with witness version, Solana base58 and on-curve check, Cosmos bech32 with its HRP, Tron, XRP, Litecoin, Dogecoin, Cardano, Polkadot SS58 and Algorand. Returns every chain the address is valid for (ambiguous when several match), the checksummed form for EVM addresses, and the reason a check failed, including unrecognised_format.

Endpoint	`https://api.duoleads.com/v1/chain/address`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~280 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	0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39
method	GET
last updated	2026-10-18T05:06:22.02Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.duoleads.com/v1/chain/address
# 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-d9e232ae0ecfbf7a

Search the whole marketplace from your agent (MCP)

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