Evaluate an SPF record against an IPv4/IPv6 address using only its literal ip4/i...
https://emailauth.openverbs.com/v1/spf-checkOverview
Evaluate an SPF record against an IPv4/IPv6 address using only its literal ip4/ip6/all mechanisms. DNS-dependent mechanisms (include, a, mx, exists, redirect) reached before a match yield an honest `indeterminate` result rather than a guess.
Protocol
x402 (POST)
Price
$0.0040
Payment Asset
USD Coin
Payment Network
Base
Category
uncategorized
Provider
Email authentication
Source
bazaar
Indexed
2026-09-05 13:13:48
Health
Status
healthy
Latency (p50)
686ms
Uptime (30d)
100.0%
Reliability Score
90/100
Last Checked
2026-10-27 22:25:15
Last Healthy
2026-10-27 22:25:15
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Input Schema
{
"body": {
"ip": "192.0.2.10",
"record": "v=spf1 ip4:192.0.2.0/24 -all"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-10-27 22:25:15 | healthy | 402 | 1162ms | |
| 2026-10-27 21:23:52 | healthy | 402 | 704ms | |
| 2026-10-27 21:05:22 | healthy | 402 | 686ms | |
| 2026-10-27 20:07:20 | healthy | 402 | 1049ms | |
| 2026-10-27 19:04:49 | healthy | 402 | 469ms | |
| 2026-10-26 16:26:11 | healthy | 402 | 1997ms | |
| 2026-10-25 18:14:25 | healthy | 402 | 448ms | |
| 2026-10-25 17:03:57 | healthy | 402 | 457ms |