Marketplace · API · x402

toll402.dev/v1/t/mst_vn_validate

Offline structural validator for a Vietnamese Enterprise/Tax Code (Mã số thuế, MST). Strips spaces, checks the 10-digit head-office pattern or the 13-character branch pattern (10 digits + '-' + 3-digit sequence). Uses regex only since the official modulus-11 check-digit weight table is not consistently published.

Endpointhttps://toll402.dev/v1/t/mst_vn_validate
Trust✓ Verified callable · 100% uptime over 1 checks · ~767 ms
PricingPay per call with x402, no account. Call it to get an exact quote before paying.
networkeip155:8453
schemeexact
pay to0x318d34fa0bd69eff17fac648d2df8cf7a88b3dbe
methodPOST
last updated2026-10-25T23:39:40.956Z

Use it

Call it (an x402 client pays automatically)

curl -i https://toll402.dev/v1/t/mst_vn_validate
# 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-a70a016c4ba42d70

Search the whole marketplace from your agent (MCP)

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