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SerwerSMS pricing: phone validation API, POST /phones/nat

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22% complete: 2 of the 9 key fields we checkSee the 9 fields

$0.00per 1,000 phonesWe haven't run SerwerSMS through our phone validation API benchmark yet.This plan is free. We rank 888 plans for phone validation APIs by price. Half the plans cost $3.376 per 1,000 phones or less.Botoi's $199 monthly plan is the cheapest paid plan per 1,000 phones: as little as $0.0066. Botoi's $199 monthly plan covers up to 1,000,000 phones a day.Data247, Foxentry and HLR Lookups are the best phone validation API providers in the Datacircle benchmark.
Plan: Free trial one of SerwerSMS's 7 plans
Call: POST /phones/nat one of SerwerSMS's 3 calls
API: Phone validation API SerwerSMS's only API

About this item

  • Freshness. We don't know how fresh this plan's data is.
  • 2 of the 9 key fields we check. Number, Validity.
  • Nothing to pay.
  • One call. You send phone to POST /phones/nat. You can also send url. The call returns a job. You fetch the answer once the job is done. Or the provider sends the answer to your webhook.
  • Who can get it: entrepreneurs: its terms define a Subscriber as an entrepreneur. Keep data: no limit. Use data: with conditions.

SerwerSMS: phone validation API alternatives

SerwerSMS alternatives: every phone validation API provider ranked

The table starts with SerwerSMS's cheapest paid plan. Next come plans from other providers with the price per 1,000 phones closest to SerwerSMS's. We also show the BigDataCorp plan. Its price is farther from the price of SerwerSMS's cheapest paid plan.

SerwerSMS, top-up from PLN 50, Prepaid, POST /phones/natBigDataCorp, pay as you go, 1 - 10.000Kendo, $164 yearlyHLR Lookup, £43 pack, 10,000 lookups, POST /apiv2/hlr, Full HLR lookup, fullMTS Exolve, top-up, Базовый: до 50 000 запросов в месяцPostcoder, £296 monthly
$ per 1,000 phones$23.176$21.641$22.778$22.936$23.281$23.683
Completeness22%44%22%89%11%56%
Billingpay firstpay as you goyearlypay firstpay firstmonthly
PayPLN 50monthly$164£43any amount£296
Enough foras many as you pay foras many as you pay for600 calls a month2,500 resultsas many as you pay forabout 16,666 calls a month
Freshnessunknownunknownstoredlivelivelive
Who can get itentrepreneurs: its terms define a Subscriber as an entrepreneurcompanies with a Brazilian CNPJ that sign its terms of use and pass its reviewanyone 18 or over with authority to bind the company or business the account is foranyoneanyone who accepts the Platform terms: an individual, a legal entity, a self-employed person or a sole proprietoranyone

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-04.

  1. dev.serwersms.pl/https-api-v2
  2. dev.serwersms.pl/https-api-v2/autoryzacja
  3. dev.serwersms.pl/https-api-v2/nat-sprawdzanie-dostepnosci-numeru
  4. docs.serwersms.pl/SerwerSMS_term_of_use.pdf
  5. en.serwersms.pl/pricing
  6. en.serwersms.pl/services/checking-numbers
  7. serwersms.pl/cennik/cennik-pre-paid

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Number
  • Formats, not in the answer
  • Validity
  • Type, not in the answer
  • Carrier, not in the answer
  • Porting and roaming, not in the answer
  • Place, not in the answer
  • Risk, not in the answer
  • Owner, not in the answer
Price
$ per 1,000 phones$0.00
Billingfree
Aggregators
Aggregatorsnone
Charges
Also pays forSending SMS messages with the same content: 100 free messages
Not found
$ per 1,000$0.00
In their words
Their pitchFunctionality allows you to monitor the availability of the number for 72 hours from the time of order.
Data
CountriesPoland
What it checksnumbering plan, line in service
Keep datano limit
Use dataSubscriber shall not be entitled irrespective of the technical means used to enable third parties to use Serwer SMS or to use Serwer SMS for third parties needs in any other way than described in the paragraph 2. [...] It is forbidden to share account to third parties, unless the Account is used by an authorized employee or associate of the Subscriber.
Plan
Pay$0
Expires14 days
Speed
Answerby polling or webhook
The call
You sendphone. Optional: url
MethodPOST
Path/phones/nat
About the plan
PlanFree trial
Who can get itentrepreneurs: its terms define a Subscriber as an entrepreneur
The 3 fields the plan's answer can hold

phone number, status, check completed date

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