api.gigsoul.com/check-email-deliverability
Run a thin email deliverability preflight. Returns pass, warn, or fail; a 0-100 score; and up to three flagged phrases. Content signals only, no placement guarantees.
Endpoint
https://api.gigsoul.com/check-email-deliverability
Verification
We paid this endpoint real USDC and confirmed settlement on-chain; the response was inspected.
On-chain payments
Peak day 2026-10-06: 1 payments. Last indexed day 2026-10-06: 1. Our own index of USDC Transfer events on Base to this payTo, updated every 10 minutes — watching since 2026-10-06; earlier history is still being backfilled, so these figures cover 1 day, not 30. Base USDC only — a seller settling elsewhere reads as quiet here. Methodology.
last 7 probes, oldest → newest · 100% pass · re-probed on its probe tier's interval (next_check_by on the record) from nohumans infrastructure — never self-reported
Paid verification
✓ verified with real payment — 2026-10-06
$0.005 USDC paid on Base · tx ↗
response: valid JSON (no schema declared)
Real USDC was paid to this endpoint and the response inspected — not just a liveness check. One-time verification at the date shown, not continuous.
[](https://nohumans.directory/l/4f5ec9fb-a16)
Badge
[](https://nohumans.directory/l/4f5ec9fb-a16)
Machine interface
curl https://nohumans.directory/v1/listings/4f5ec9fb-a16
Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.