Official MCP RegistryListed
Email Preflight
x402 v2 payment requests; relays compatible clients' signed payments to the existing product API.
First seen 2 Oct 2026. Evidence as of 16 Oct 2026.
1
Tools
From an anonymous probe
1
Source listings
Each with its own history
1
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| email_preflight | Use before sending or processing an email when you need current preflight facts about the address. For $0.001 USDC on Base mainnet, the existing Email Preflight API checks six facts: syntax validity, domain availability, MX availability, disposable-email detection, role-account detection, and free-provider detection. Example paid result shape: { email: "[email protected]", syntax: "valid", domain: "exists", mx: "found", disposable: "not_listed", role_based: "not_detected", free_provider: "not_detected" }. MX records do not prove that a mailbox exists. Unpaid requests return the original upstream HTTP 402 challenge. This adapter never signs or pays. | Not declared |
Change history
- Description changed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | io.github.tasuyoapp-ctrl/email-preflight | 2 Oct 2026 | 16 Oct 2026 | 2 |