2s.io pricing: email verification API
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50% complete: 3 of the 6 fields on our checklistSee the 6 fields
$0.00per 1,000 emailsWe ran 2s.io in our email verification API benchmark. We didn't score any 2s.io plan.This plan is free. We rank 4,337 plans for email verification APIs by price. Half the plans cost $2.00 or less per 1,000 emails. See the best free email verification API plan.treg's top-up from $10 is the cheapest paid plan per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $68.365 per 1,000 emails when no provider answers. StableEnrich's pay-as-you-go plan costs the least for 10,000 emails a month: $0.05.Disify's $9 monthly plan (/
Plan: Free trial one of 2s.io's 2 plans
Call:
GET / 2s.io's only call for this APIAPI: Email verification API one of 2s.io's 15 APIs
- Company hierarchy API
- Domain WHOIS API
- Email verification API
- Local business search API
- News API
- GitHub profile API
- GitHub repository API
- GitHub user repository API
- Hacker News search API
- Company enrichment API
GET /api/ business/ br-cnpj - Company enrichment API
GET /api/ business/ lei - Company enrichment API
GET /api/ business/ pl-krs - Company enrichment API
GET /api/ tax/ vat - Business verification API
GET /api/ business/ entity-profile - Business verification API
GET /api/ business/ fi-companies - Business verification API
GET /api/ business/ fr-companies - Business verification API
GET /api/ business/ no-companies - Business verification API
GET /api/ business/ sos-search - Business verification API
GET /api/ business/ uk-companies - IP company lookup API
GET /api/ geo/ ip - IP company lookup API
POST /api/ ipinfo/ bulk - IP company lookup API
GET /api/ net/ ip-resolve - Job postings API
GET /api/ gov/ usajobs - Job postings API
GET /api/ job/ federal-search - Web search API
GET /api/ search/ ai - Web search API
GET /api/ search/ web - Web scraping API
POST /api/ search/ extract - Web scraping API
GET /api/ url/ clean - Web scraping API
GET /api/ url/ render
About this item
- Freshness. We don't know how fresh this plan's data is.
- 3 of the 6 fields on our checklist. Address, Deliverability, Company.
- Nothing to pay. 2s.io limits how many calls you get but gives no number.
- One call. You send
emailtoGET /. You can also sendapi/ email/ validate checkMx. The call returns whether the address takes mail. - Who can get it: with conditions. Keep data: no API terms. Use data: no API terms.
2s.io: email verification API alternatives
2s.io alternatives: other email verification API providers by price
The table starts with 2s.io's cheapest paid plan. Next come plans from other providers with the price per 1,000 emails closest to 2s.io's.
| 2s.io, pay as you go | DeBounce, top-up from $25, 10K credits, GET /v1/, Single email validation | BounceShift, $250 pack, 100,000 credits, POST /validate/single | ExactVerify, $125 pack, Pay-As-You-Go from 50,000 emails, GET /v1/single | Kawaa, $250 pack, 100,000 credits, POST /v1/verify | |
|---|---|---|---|---|---|
| $ per 1,000 emails | $2.50 | $2.50 | $2.50 | $2.50 | $2.50 |
| Completeness | 50% | 50% | 50% | 33% | 67% |
| Billing | pay as you go | pay first | pay first | pay first | pay first |
| Pay | per call | $25 | $250 | $125 | $250 |
| Enough for | as many as you pay for | 10,000 calls | 100,000 calls | 50,000 calls | 100,000 calls |
| Freshness | unknown | live | 24 hours | live | 24 hours |
| Who can get it | anyone with a wallet holding USDC on Base or Solana, paying each call over x402, with no account or API key | anyone over 18 | anyone at least 18 years old | anyone with a business email address | anyone at least 18 years old |
Sources
From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-09.
Product details
The key fields this plan's answer can hold, then each filled column in its row on the sheet.
- Address
- Deliverability
- Confidence, not in the answer
- Name, not in the answer
- Place, not in the answer
- Company
| $ per 1,000 emails | $0.00 |
|---|---|
| Per | call |
| Billing | free |
| Aggregators | none |
|---|
| Also pays for | nothing else |
|---|
| $ per 1,000 | $0.00 |
|---|
| Their pitch | Validate an email address and return structured signals: RFC syntax validity (isSyntaxValid + reason if not), the normalized address with split local/domain, and boolean flags for isDisposable (throwaway/temp-mail domain), isRoleAccount (info@, support@, admin@, …), and isFreeProvider (gmail/outlook/yahoo/icloud/…). |
|---|
| What it checks | format, mail servers, disposable domains, role addresses |
|---|---|
| Keep data | no API terms |
| Use data | no API terms |
| Pay | $0 |
|---|
| Per second | 0.00028 |
|---|---|
| Batch | 1 |
| Answer | in the call |
|---|
| You send | email. Optional: checkMx |
|---|---|
| Method | GET |
| Path | /api/email/validate |
| Plan | Free trial |
|---|---|
| Who can get it | anyone, with no wallet or payment, for one call per endpoint per hour (a request with ?trial=1 or the X-2s-Trial: 1 header) |
The 12 fields the plan's answer can hold
email, normalized email, local part, domain, syntax valid, disposable, role account, free provider, has MX records, MX hosts, reason, note