Discover / x402-test.crewofthecaptain.com

x402 Format Checker

Not checked

Format and checksum validation for IBAN, EU VAT, Polish NIP/REGON/PESEL and email, pay-per-call via x402. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base. POST JSON {"value": "..."}; values are never stored and personal identifiers are masked. Also a remote MCP server (/mcp) and A2A agent (/.well-known/agent-card.json).

x402
Base
USDC
Verification

Listed price: $0.001
Checks: Not checked
In our index since: 14 Oct 2026

Endpoint

curl -i https://x402-test.crewofthecaptain.com/api/validate/email
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/x402-test.crewofthecaptain.com

Questions

What price is recorded for x402 Format Checker?

Its listed price is $0.001.

What payment terms does x402 Format Checker advertise?

The listing advertises x402, Base and USDC. Check the seller's current payment challenge and authentication requirements before paying.

Where is x402 Format Checker listed?

In x402-list.com. Superstables first indexed it on 14 Oct 2026.

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