Verify whether an email address is real and safe to send to. Checks RFC syntax, live MX re

https://api.hergertsynthora.com/v1/mailcheck

Shares a payout wallet with 147 other endpoints — its adoption is attributed from that shared wallet's traffic, not earned exclusively.

Verify whether an email address is real and safe to send to. Checks RFC syntax, live MX records, catch-all and disposable/temporary domains, role accounts (info@, admin@), free providers and common typos, returning a deliverability status and confidence score. Use it to validate and enrich contacts, clean email lists and prevent bounces. Deterministic, 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.

59
reliability

Reliability & health

Uptime and response time from our own unpaid probes, plus the reliability score built from them.

7 days 30 days

Uptime

100.0% avg
0% 50% 100% Thu 8 PMSun 3 AMTue 10 AMThu 6 PM

Response time

p50 116ms · p95 150ms
0ms 250ms 500ms Thu 8 PMSun 3 AMTue 10 AMThu 6 PM
Data table
Reliability history per time bucket over the last 7 days (hourly).
Bucket Uptime Probes Response time
8/13/2026, 8:00:00 PM 100% 1 108ms
8/13/2026, 9:00:00 PM 100% 1 110ms
8/13/2026, 10:00:00 PM 100% 1 113ms
8/13/2026, 11:00:00 PM 100% 1 134ms
8/14/2026, 12:00:00 AM 100% 1 108ms
8/14/2026, 1:00:00 AM 100% 1 115ms
8/14/2026, 3:00:00 AM 100% 1 118ms
8/14/2026, 4:00:00 AM 100% 1 121ms
8/14/2026, 5:00:00 AM 100% 1 113ms
8/14/2026, 6:00:00 AM 100% 1 139ms
8/14/2026, 7:00:00 AM 100% 1 107ms
8/14/2026, 8:00:00 AM 100% 1 126ms
8/14/2026, 10:00:00 AM 100% 1 113ms
8/14/2026, 11:00:00 AM 100% 1 111ms
8/14/2026, 12:00:00 PM 100% 1 113ms
8/14/2026, 1:00:00 PM 100% 1 111ms
8/14/2026, 3:00:00 PM 100% 1 124ms
8/14/2026, 4:00:00 PM 100% 1 113ms
8/14/2026, 5:00:00 PM 100% 1 141ms
8/14/2026, 6:00:00 PM 100% 1 108ms
8/14/2026, 7:00:00 PM 100% 1 113ms
8/14/2026, 8:00:00 PM 100% 1 114ms
8/14/2026, 9:00:00 PM 100% 1 111ms
8/14/2026, 11:00:00 PM 100% 1 151ms
8/15/2026, 12:00:00 AM 100% 1 114ms
8/15/2026, 1:00:00 AM 100% 1 121ms
8/15/2026, 2:00:00 AM 100% 1 113ms
8/15/2026, 3:00:00 AM 100% 1 111ms
8/15/2026, 4:00:00 AM 100% 1 113ms
8/15/2026, 6:00:00 AM 100% 1 130ms
8/15/2026, 7:00:00 AM 100% 1 111ms
8/15/2026, 8:00:00 AM 100% 1 135ms
8/15/2026, 9:00:00 AM 100% 1 115ms
8/15/2026, 10:00:00 AM 100% 1 120ms
8/15/2026, 11:00:00 AM 100% 1 111ms
8/15/2026, 12:00:00 PM 100% 1 108ms
8/15/2026, 1:00:00 PM 100% 1 117ms
8/15/2026, 3:00:00 PM 100% 1 110ms
8/15/2026, 4:00:00 PM 100% 1 110ms
8/15/2026, 5:00:00 PM 100% 1 110ms
8/15/2026, 6:00:00 PM 100% 1 109ms
8/15/2026, 7:00:00 PM 100% 1 114ms
8/15/2026, 8:00:00 PM 100% 1 110ms
8/15/2026, 10:00:00 PM 100% 1 132ms
8/15/2026, 11:00:00 PM 100% 1 111ms
8/16/2026, 12:00:00 AM 100% 1 112ms
8/16/2026, 1:00:00 AM 100% 1 118ms
8/16/2026, 2:00:00 AM 100% 1 114ms
8/16/2026, 3:00:00 AM 100% 1 110ms
8/16/2026, 5:00:00 AM 100% 1 158ms
8/16/2026, 6:00:00 AM 100% 1 112ms
8/16/2026, 7:00:00 AM 100% 1 108ms
8/16/2026, 8:00:00 AM 100% 1 150ms
8/16/2026, 9:00:00 AM 100% 1 117ms
8/16/2026, 10:00:00 AM 100% 1 108ms
8/16/2026, 12:00:00 PM 100% 1 108ms
8/16/2026, 1:00:00 PM 100% 1 109ms
8/16/2026, 2:00:00 PM 100% 1 113ms
8/16/2026, 3:00:00 PM 100% 1 107ms
8/16/2026, 4:00:00 PM 100% 1 118ms
8/16/2026, 5:00:00 PM 100% 1 110ms
8/16/2026, 7:00:00 PM 100% 1 108ms
8/16/2026, 8:00:00 PM 100% 1 107ms
8/16/2026, 9:00:00 PM 100% 1 119ms
8/16/2026, 10:00:00 PM 100% 1 112ms
8/16/2026, 11:00:00 PM 100% 1 156ms
8/17/2026, 12:00:00 AM 100% 1 104ms
8/17/2026, 2:00:00 AM 100% 1 110ms
8/17/2026, 3:00:00 AM 100% 1 111ms
8/17/2026, 4:00:00 AM 100% 1 105ms
8/17/2026, 5:00:00 AM 100% 1 139ms
8/17/2026, 6:00:00 AM 100% 1 137ms
8/17/2026, 7:00:00 AM 100% 1 114ms
8/17/2026, 9:00:00 AM 100% 1 150ms
8/17/2026, 10:00:00 AM 100% 1 117ms
8/17/2026, 11:00:00 AM 100% 1 110ms
8/17/2026, 12:00:00 PM 100% 1 140ms
8/17/2026, 1:00:00 PM 100% 1 114ms
8/17/2026, 2:00:00 PM 100% 1 116ms
8/17/2026, 4:00:00 PM 100% 1 106ms
8/17/2026, 5:00:00 PM 100% 1 110ms
8/17/2026, 6:00:00 PM 100% 1 103ms
8/17/2026, 7:00:00 PM 100% 1 119ms
8/17/2026, 8:00:00 PM 100% 1 118ms
8/17/2026, 9:00:00 PM 100% 1 119ms
8/17/2026, 11:00:00 PM 100% 1 106ms
8/18/2026, 12:00:00 AM 100% 1 114ms
8/18/2026, 1:00:00 AM 100% 1 113ms
8/18/2026, 2:00:00 AM 100% 1 117ms
8/18/2026, 3:00:00 AM 100% 1 119ms
8/18/2026, 4:00:00 AM 100% 1 112ms
8/18/2026, 6:00:00 AM 100% 1 121ms
8/18/2026, 7:00:00 AM 100% 1 108ms
8/18/2026, 8:00:00 AM 100% 1 110ms
8/18/2026, 9:00:00 AM 100% 1 144ms
8/18/2026, 10:00:00 AM 100% 1 137ms
8/18/2026, 11:00:00 AM 100% 1 113ms
8/18/2026, 1:00:00 PM 100% 1 127ms
8/18/2026, 2:00:00 PM 100% 1 111ms
8/18/2026, 3:00:00 PM 100% 1 112ms
8/18/2026, 4:00:00 PM 100% 1 118ms
8/18/2026, 5:00:00 PM 100% 1 117ms
8/18/2026, 6:00:00 PM 100% 1 376ms
8/18/2026, 8:00:00 PM 100% 1 133ms
8/18/2026, 9:00:00 PM 100% 1 115ms
8/18/2026, 10:00:00 PM 100% 1 135ms
8/18/2026, 11:00:00 PM 100% 1 450ms
8/19/2026, 12:00:00 AM 100% 1 117ms
8/19/2026, 1:00:00 AM 100% 1 113ms
8/19/2026, 3:00:00 AM 100% 1 128ms
8/19/2026, 4:00:00 AM 100% 1 135ms
8/19/2026, 5:00:00 AM 100% 1 118ms
8/19/2026, 6:00:00 AM 100% 1 126ms
8/19/2026, 7:00:00 AM 100% 1 121ms
8/19/2026, 8:00:00 AM 100% 1 125ms
8/19/2026, 10:00:00 AM 100% 1 136ms
8/19/2026, 11:00:00 AM 100% 1 114ms
8/19/2026, 12:00:00 PM 100% 1 149ms
8/19/2026, 1:00:00 PM 100% 1 147ms
8/19/2026, 2:00:00 PM 100% 1 122ms
8/19/2026, 3:00:00 PM 100% 1 116ms
8/19/2026, 4:00:00 PM 100% 1 120ms
8/19/2026, 6:00:00 PM 100% 1 130ms
8/19/2026, 7:00:00 PM 100% 1 133ms
8/19/2026, 8:00:00 PM 100% 1 190ms
8/19/2026, 9:00:00 PM 100% 1 116ms
8/19/2026, 10:00:00 PM 100% 1 109ms
8/19/2026, 11:00:00 PM 100% 1 134ms
8/20/2026, 1:00:00 AM 100% 1 116ms
8/20/2026, 2:00:00 AM 100% 1 140ms
8/20/2026, 3:00:00 AM 100% 1 123ms
8/20/2026, 4:00:00 AM 100% 1 113ms
8/20/2026, 5:00:00 AM 100% 1 118ms
8/20/2026, 6:00:00 AM 100% 1 116ms
8/20/2026, 7:00:00 AM 100% 1 145ms
8/20/2026, 8:00:00 AM 100% 1 140ms
8/20/2026, 10:00:00 AM 100% 1 144ms
8/20/2026, 11:00:00 AM 100% 1 118ms
8/20/2026, 12:00:00 PM 100% 1 154ms
8/20/2026, 1:00:00 PM 100% 1 115ms
8/20/2026, 2:00:00 PM 100% 1 112ms
8/20/2026, 3:00:00 PM 100% 1 135ms
8/20/2026, 4:00:00 PM 100% 1 120ms
8/20/2026, 6:00:00 PM 100% 1 132ms
59
Composite reliability — the weighted average of the dimensions below, on a 0–100 scale.
Availability
100

How often it was reachable when we probed it (weight 35%).

Latency
100

How quickly it answers when it is up — fast scores high (weight 20%).

Security
100

Whether it serves over working TLS / https (weight 15%).

Transparency
42

Whether the operator disclosed what it does — description, schema, identity (weight 15%).

Activity
1

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 92% — 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
USDC
Networks
base
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.

On-chain activity (base)

218
payments (30d)
5.27
USD volume (30d)
36
paying wallets (30d)

Payments per day

last payment 8/20/2026
0 30 60 Jul 22Jul 29Aug 12Aug 20
Data table
Settled payments per day.
Day Payments Volume (USD) Paying wallets
7/22/2026 10 0.01 1
7/23/2026 2 0 1
7/24/2026 2 0.01 1
7/25/2026 12 0.01 1
7/26/2026 21 0.16 11
7/27/2026 6 0.04 3
7/29/2026 3 0.03 1
7/30/2026 1 0 1
7/31/2026 17 0.17 10
8/1/2026 2 0.02 2
8/7/2026 2 0.02 2
8/12/2026 30 1.26 2
8/13/2026 15 0.42 3
8/14/2026 6 0.12 1
8/17/2026 10 0.18 3
8/18/2026 53 1.2 3
8/19/2026 11 1.08 2
8/20/2026 15 0.56 2

This payout wallet is shared: figures cover all 156 endpoints paid at it, since payments cannot be attributed to one of them. Only payments settled on chains and facilitators we index.

Linked by wallet — likely same operator

On-chain agent identity and the x402 endpoint that shares its settlement wallet.

https://api.hergertsynthora.com/v1/code-sandbox x402 endpoint https://api.hergertsynthora.com/v1/dispute-risk x402 endpoint https://api.hergertsynthora.com/v1/stablecoin-depeg x402 endpoint https://api.hergertsynthora.com/v1/commodity-macro x402 endpoint https://api.hergertsynthora.com/v1/polymarket-whales x402 endpoint https://api.hergertsynthora.com/v1/daily-intel-brief x402 endpoint https://usgs-realtime-streamflow.hergertsynthora.com/service x402 endpoint https://api.hergertsynthora.com/v1/funding-spread x402 endpoint https://api.hergertsynthora.com/v1/stablecoin-supply x402 endpoint https://api.hergertsynthora.com/v1/vessel-sanctions x402 endpoint https://api.hergertsynthora.com/v1/txintent x402 endpoint https://api.hergertsynthora.com/v1/asset-risk x402 endpoint https://api.hergertsynthora.com/v1/macrobundle x402 endpoint https://api.hergertsynthora.com/v1/polymarket-odds-movers x402 endpoint https://inference.hergertsynthora.com/service x402 endpoint https://ohlcv-candles.hergertsynthora.com/service x402 endpoint https://fear-greed.hergertsynthora.com/service x402 endpoint https://api.hergertsynthora.com/v1/mtasts x402 endpoint https://api.hergertsynthora.com/v1/emerging-protocols x402 endpoint https://api.hergertsynthora.com/v1/regwatch x402 endpoint https://api.hergertsynthora.com/v1/space-weather-risk x402 endpoint https://api.hergertsynthora.com/v1/sanctions-screen x402 endpoint https://api.hergertsynthora.com/v1/domain-risk x402 endpoint https://coingecko-crypto-price-history.hergertsynthora.com/service x402 endpoint https://api.hergertsynthora.com/v1/exchange-rates-verified x402 endpoint https://binance-crypto-24h-stats.hergertsynthora.com/service x402 endpoint https://api.hergertsynthora.com/v1/marine-wave-forecast x402 endpoint https://llm-fast.hergertsynthora.com x402 endpoint https://api.hergertsynthora.com/v1/gdelt-tension x402 endpoint https://stock-intel.hergertsynthora.com/service x402 endpoint https://payto-preflight.hergertsynthora.com/service x402 endpoint https://api.hergertsynthora.com/v1/market-sentiment x402 endpoint https://api.hergertsynthora.com/v1/amlscreen x402 endpoint https://llm-smart.hergertsynthora.com x402 endpoint https://api.hergertsynthora.com/v1/registry-watch x402 endpoint https://api.hergertsynthora.com/v1/tx-simulator x402 endpoint https://yahoo-equity-delayed-quote.hergertsynthora.com/service x402 endpoint https://api.hergertsynthora.com/v1/ecb-forex-fixing-vs-market x402 endpoint https://api.hergertsynthora.com/v1/polymarket-resolution-watch x402 endpoint https://api.hergertsynthora.com/v1/market-resolution x402 endpoint https://api.hergertsynthora.com/v1/weather-now x402 endpoint https://llm-fast.hergertsynthora.com/v1/chat/completions x402 endpoint https://api.hergertsynthora.com/v1/fear-greed x402 endpoint https://polymarket-markets.hergertsynthora.com/service x402 endpoint https://api.hergertsynthora.com/v1/market-dominance x402 endpoint https://forex-latest.hergertsynthora.com/service x402 endpoint https://sanctions-screen.hergertsynthora.com/service x402 endpoint https://protocol-tvl.hergertsynthora.com/service x402 endpoint https://api.hergertsynthora.com/v1/endpoint-trust x402 endpoint https://api.hergertsynthora.com/v1/rpc-ens x402 endpoint