Audit a domain's email deliverability and sender reputation. Checks SPF, DKIM selectors, D
https://api.hergertsynthora.com/v1/deliverAudit a domain's email deliverability and sender reputation. Checks SPF, DKIM selectors, DMARC policy strength (reject/quarantine/none), BIMI, MX and PTR records, returning a spam score and prioritized fixes. Use it to assess inbox placement, email authentication and domain reputation before sending. Deterministic DNS-only, Ed25519-signed. 0.001 USDC on Base. First 3 calls FREE per wallet — send header X-WALLET: 0x<your Base address> (no payment); then \ per call.
Reliability & health
Uptime and response time from our own unpaid probes, plus the reliability score built from them.
Uptime
100.0% avgResponse time
p50 118ms · p95 290msData table
| Bucket | Uptime | Probes | Response time |
|---|---|---|---|
| 8/15/2026, 12:00:00 AM | 100% | 1 | 130ms |
| 8/16/2026, 12:00:00 AM | 100% | 1 | 137ms |
| 8/17/2026, 12:00:00 AM | 100% | 1 | 115ms |
| 8/18/2026, 12:00:00 AM | 100% | 1 | 129ms |
| 8/19/2026, 12:00:00 AM | 100% | 20 | 124ms |
| 8/20/2026, 12:00:00 AM | 100% | 20 | 138ms |
- Availability
- 100
- Latency
- 100
- Security
- 100
- Transparency
- 42
- Activity
- not yet measured
How often it was reachable when we probed it (weight 35%).
How quickly it answers when it is up — fast scores high (weight 20%).
Whether it serves over working TLS / https (weight 15%).
Whether the operator disclosed what it does — description, schema, identity (weight 15%).
Observed on-chain payments to this endpoint's wallet — transactions, volume, and distinct paying wallets over the last month (weight 15%; not yet measured when we have not seen its wallet settle).
Confidence 88% — how much probe evidence backs this score. A thin history is flagged, not hidden.
See the scoring methodology for exactly how each number is computed.
Payment
- Currencies
- —
- Networks
- —
- Facilitator
- unknown
- SDK
- unknown
Operator
- Company
- inferred — unknown
- Jurisdiction
- —
- Registrar
- IONOS SE
- Domain registered
- 2026-06-04
- Hosting network
- TT-20260601
- Hosting country
- DE
Operator context is derived from public RDAP/TLS records and unverified. Company and country are only available for endpoints that publish them (an OV/EV TLS certificate or a non-redacted domain record); most endpoints are CDN-fronted and disclose neither.