MarketplaceTrust

Seller Verification

Verify buyer and seller contact addresses at listing time to keep marketplace communication reliable.

Start with 500 free creditsDocumentation

Email validity · 1 credit per lookup · no monthly fee

Verified seller
shop@maker.store

The problem

Marketplaces live on communication between strangers. When a seller's contact address is dead, orders stall, disputes escalate, and the buyer blames your platform, not the seller they never managed to reach.

With Encrata

Verify contact addresses at listing time and re-check when activity looks off. Encrata confirms the mailbox actually accepts mail, so 'contact seller' always has a working address behind it. Failed re-checks can pause listings automatically until the seller updates their details.

How it works

1

Send the address

Call the validity endpoint with the email address at the moment it enters your system, a form, an import, a checkout.

2

We ask the mail server

Encrata checks syntax, domain and mailbox directly with the receiving server, and flags disposable and typo domains.

3

Act on the verdict

Accept, reject or suggest a correction based on a clear valid / invalid / catch-all / risky verdict. One credit per check.

One call, structured answer

Seller Verification runs on the email validity lookup at 1 credit per lookup. Same API key, same JSON shape as every other Encrata lookup.

  • Answers come from the mail server itself, not a guess from patterns
  • Disposable and throwaway domains are flagged before they cost you anything
  • 1 credit per check, cheap enough to run on every address you touch
  • Cached results are free, so repeated checks never double-charge
Terminal
curl -X POST "https://encrata.com/api/agent/validate" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email": "sara@acme.com"}'
response.json
{
  "email": "sara@acme.com",
  "status": "valid",
  "reason": "deliverable",
  "disposable": false,
  "confidence": "high",
  "provider": "google",
  "message": "Mailbox exists and accepts mail, safe to send.",
  "credits": 1
}

Verify at listing time

Verify at listing creation and gate re-verification on activity signals: a seller whose response rate drops or whose messages start bouncing gets an automatic re-check. Failed verification pauses the listing with a self-serve fix, 'update your contact email to reactivate', so enforcement doesn't create support load.

Fewer disputes, more trust

Marketplaces that add contact verification see dispute rates fall for a mundane reason: most 'unresponsive seller' complaints were never malice, just dead mailboxes. Verified-contact badges also become a trust signal buyers actually notice, and the marketplace's own transactional mail (order notifications, payout alerts) stops bouncing into the void.

More email validity use cases

View all

Create account

sara@acme.com
Deliverable — safe to accept
Sign up

Signup Validation

Block fake and mistyped emails during account registration, so every new account starts with a working address

SaaSAcquisition
jules@stripe.com
old@defunct.io
ana@vercel.com
1 removed · 2 kept

List Cleaning

Remove invalid and dead addresses before outbound campaigns to keep open rates honest and costs down

MarketingOperations

Bounce rate

↓ 0.4%
JanJul

Bounce Reduction

Cut hard bounces before you hit send and keep your sender reputation and inbox placement intact

MarketingDeliverability
Start with 500 free credits
$curl https://encrata.com/api/agent/lookup -H "Authorization: Bearer YOUR_API_KEY" -d '{"e": "satya@microsoft.com"}'