# Greip, free: Phone validation API

> This method serves as an additional layer of protection in your system for validating phone numbers. It not only checks the syntax but also assesses the likelihood of the phone number being valid and operational.

Greip's phone validation API on its 3-day free trial plan. It costs $0.00 per 1,000 phones. It returns 5 of the 9 key fields we check: Number, Validity, Carrier, Place, Risk.
We haven't run Greip through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 768 plans for phone validation APIs by price. Half the plans cost $3.60 per 1,000 phones or less.
[Botoi's $199 monthly plan](https://datacircle.dev/validate-phone-apis/botoi/199-monthly/llms.txt) 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](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt), [Foxentry](https://datacircle.dev/validate-phone-apis/foxentry/top-up-pay-as-you-go-post-phone-validate-validate-phone-number-extended/llms.txt) and [HLR Lookups](https://datacircle.dev/validate-phone-apis/hlr-lookups/top-up-1-1m-post-hlr-lookup/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/greip/free
- [Phone validation API: 40+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://greip.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `GET https://v2.greipapi.com/score/phone/{phone}`
- API key: with the plan, on https://greip.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://docs.greip.io/api-reference/v2/endpoint/scoring/phone?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: Greip (https://greip.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 56%
- Number: ✓
- Validity: ✓
- Carrier: ✓
- Place: ✓
- Risk: ✓

## Price

- $ per 1,000 phones: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Email Scoring · IP Geolocation · Bulk IP Lookup · Country Data · BIN / IIN Lookup · IBAN Validation · ASN Lookup · Payment Fraud Detection · Profanity Detection

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: This method serves as an additional layer of protection in your system for validating phone numbers. It not only checks the syntax but also assesses the likelihood of the phone number being valid and operational.

## Data

- What it checks: numbering plan
- Keep data: only as necessary for fraud prevention, security, and audit or compliance records: "systematically scrape, harvest, cache or store Output to build a database or dataset that replicates or substitutes for the Services" is not allowed
- Use data: for your internal business purposes, including within your own products and services offered to your end users, "only for their intended purpose of fraud prevention, risk assessment and related data validation and lookups", "you must not resell, sublicense, or redistribute the Services or Output as a standalone data product, or offer the Services to third parties as a competing API or data service", "You must not, and must not allow anyone else to: (a) use the Services for any unlawful, fraudulent or deceptive purpose, or in breach of any applicable law or third-party right, (b) abuse or misuse the Services beyond their intended fraud-prevention use, including using Output to discriminate unlawfully against individuals, or to surveil, profile or track individuals without a lawful basis, [...] (h) systematically scrape, harvest, cache or store Output to build a database or dataset that replicates or substitutes for the Services [...] provided you do not republish or resell Output as a standalone data product, (i) use the Services to build a competing product, or for benchmarking published without our consent"

## Plan

- Pay: $0
- You get: 1,000 requests
- Enough for: 1,000 calls, once
- Expires: 3 days

## Rate limit

- Per second: 1000
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: phone, country_code. Optional: mode, source, user_id
- Method: GET
- Path: /score/phone/{phone}

## About the plan

- Plan: 3-day free trial
- Who can get it: anyone using it for their trade, business, craft or profession, not as a consumer, the trial turns into the paid plan chosen at the end unless cancelled before it ends

## The 12 fields the plan's answer can hold

success, phone, country code, carrier, valid, blacklisted, disposable, custom rules applied, risk level, recommendation, reasons, execution time

## Greip's plans (3)

- [Greip, free](https://datacircle.dev/validate-phone-apis/greip/free/llms.txt): $0.00 per 1,000, 56% complete
- [Greip, pay as you go](https://datacircle.dev/validate-phone-apis/greip/pay-as-you-go/llms.txt): 56% complete
- [Greip, $89 monthly](https://datacircle.dev/validate-phone-apis/greip/89-monthly/llms.txt): $0.223 per 1,000, 56% complete

## Greip's calls for this API (1)

- `GET /score/phone/{phone}`: [Greip, free](https://datacircle.dev/validate-phone-apis/greip/free/llms.txt)

## Greip's APIs (2)

- [Greip: email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/greip/free/llms.txt)
- [Greip: phone validation API pricing, 3 plans](https://datacircle.dev/validate-phone-apis/greip/free/llms.txt)

## Greip: phone validation API alternatives

- [APIVoid, $2,484 yearly](https://datacircle.dev/validate-phone-apis/apivoid/2484-yearly/llms.txt): $0.207 per 1,000, 78% complete
- [Veriphone, $2,490 yearly, Enterprise, GET /v3/verify, /v3/verify](https://datacircle.dev/validate-phone-apis/veriphone/2490-yearly-enterprise-get-v3-verify-v3-verify/llms.txt): $0.207 per 1,000, 78% complete, stored
- [APIFreaks, $500 pack, One-Off 4,500,000 credits, POST /phone/validation](https://datacircle.dev/validate-phone-apis/apifreaks/500-pack-one-off-4500000-credits-post-phone-validation/llms.txt): $0.222 per 1,000, 67% complete, stored
- [ZelNum, $200 pack, Pay as you go, $200 top-up, POST /detect, iMessage Number Checker](https://datacircle.dev/validate-phone-apis/zelnum/200-pack-pay-as-you-go-200-top-up-post-detect-imessage-number-checker/llms.txt): $0.227 per 1,000, 11% complete

## 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.

- https://docs.greip.io/api-reference/v2/endpoint/scoring/phone.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.greip.io/usage-limits.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://greip.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://greip.io/detailed-pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://greip.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://greip.io/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing