Observed arrival · 2026-08-30

Proof Inbox Keeps Receipts for Email Checks

proofinbox.com Observed source

Editorial interest 78/100 Selection signal · not a rating of the site

An MCP server lets agents buy verification credits, check email addresses, and inspect receipts for charges and checks.

Landing page captured for the 2026-08-30 issue.

Field notes

The service connects an MCP agent to a credit ledger and an email-checking vendor. Its visible accounting rules charge one credit for a fresh verify_email call, waive repeats for 30 days, and treat timeouts or invalid syntax as zero-cost events. The setup instructs agents to recover from payment_required via a checkout URL, wait for credits to arrive, retry, and then consult receipts for the checkout session ID and individual checks.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

$PaidCommerce or pricing visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

ƒJavaScriptBrowser-side code central

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