Marketplace · API · x402

api.agentmercantile.com/v1/x402-presign-handoff

Produce a normalized pre-sign evidence packet for one unpaid x402 v2 exact Base USDC EIP-3009 requirement: request identity, selected requirement including asset transfer method, public payer coverage, caller ceiling, optional baseline evidence, and an integrity digest. Non-eip3009 or incomplete transfer methods fail closed. Does not sign, pay, construct a transaction, read payment-authority allowances, or recommend whether to buy.

Endpointhttps://api.agentmercantile.com/v1/x402-presign-handoff
Trust100% uptime over 1 checks · ~1332 ms
PricingPay per call with x402, no account. Call it to get an exact quote before paying.
networkeip155:8453
schemeexact
pay to0xdb7b2b54f80479826222749a2ea73a8acc306e1e
methodPOST
last updated2026-10-25T19:20:52.527Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.agentmercantile.com/v1/x402-presign-handoff
# 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/x402-0901d7c95cc8e5ae

Search the whole marketplace from your agent (MCP)

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