Quant Agent Shop
quantagentshop.
Email address check without sending mail. Returns syntax validity, the normalised address, whether the domain accepts mail (MX, null MX or address fallback), and flags for disposable, role (info@, support@) and free webmail addresses, with a verdict. Use to validate an address someone gave you. Does not confirm the mailbox exists. Typical response under 1 s. Failed calls are not charged.
Live
Last successful check: 26 Oct 2026, 07:23 UTC.
- answered, last 24 hours
- 100%
- answered, last 30 days
- 100%
5 different wallets paid it in the last 30 days, as the x402 Bazaar reports. Payments
How addrbook checks →Connect
https:x402: an unpaid request gets a 402 with the price and pay-to wallet. addrbook never pays.
Who's behind it
- Listed by
- x402 Bazaarlast seen UTC
- Wallets named
- 0x4d8d8d4f04512029172e0176744eec4ae5238309named by x402 Bazaar
- Listed since
Payments
- different wallets paid it, last 30 days
- 5
- paid calls, last 30 days
- 22
- last paid call (UTC)
As the x402 Bazaar reports, from payments Coinbase's facilitator settled. Read . addrbook has not counted these payments itself.
How it asks to be paid
| Network | Price | Paid in | Settled by | Pays to |
|---|---|---|---|---|
| Base | $0.0013 | USDC | Per request | 0x4d8d8d4f04512029172e0176744eec4ae5238309 |
From its own 402 answer at UTC. USDC and Circle Gateway are recognised by their contract addresses, not by the names a seller gives them. How payments are read
Checks by endpoint
| Host | Protocol | State | Last checked (UTC) | Last answered (UTC) | 24 hours | 30 days | Tools |
|---|---|---|---|---|---|---|---|
| quantagentshop. | x402 | Live | 100% | 100% | — |
Also listed as
Other entries that share an endpoint with this one.