# seven.io, free: Cached phone validation API

> You can use this endpoint to format and check phone numbers. Check a phone number for validity, which mobile network a phone number belongs to, format a phone number in national and international format or check whether a phone number exists and is logged into the mobile network.

seven.io's cached phone validation API on its Free plan. It costs $0.00 per 1,000 phones. It returns 5 of the 9 key fields we check: Number, Formats, Type, Carrier, Place.
seven.io limits how many results you get, but doesn't say how many.
Half of the 78 plans we rank by price cost $1.688 per 1,000 or less. This plan is the cheapest of the 78 plans.

- This page: https://datacircle.dev/cached-phone-validation-apis/seven-io/free
- [Best phone validation API in 2026](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://www.seven.io/en/prices
- Its API docs: https://docs.seven.io/en/rest-api/endpoints/lookup
- Sold by: seven.io (https://www.seven.io)
- Checked: 2026-10-25

## In the answer

- Completeness: 56%
- Number: ✓
- Formats: ✓
- Type: ✓
- Carrier: ✓
- Place: ✓

## Score

- Overall score: 0.0. We give it 0 overall because its Data score is 0.
- Price score: 100
- Data score: 0
- Cost to get started score: 100
- Bundle score: 0
- Performance score: 0. We could not measure how fast this provider answers a call, so we count it as 0.

## Price

- $ per 1,000: $0.00
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Per: result
- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: You can use this endpoint to format and check phone numbers. Check a phone number for validity, which mobile network a phone number belongs to, format a phone number in national and international format or check whether a phone number exists and is logged into the mobile network.

## Data

- Freshness: stored
- Keep data: no limit
- Use data: “Both contracting parties undertake to keep all information and data received from the contracting party in connection with the execution of this contract confidential and not to make it accessible to third parties, as far as and as long as this information is not generally available [...]” [...] “The services offered by seven.io are aimed exclusively at traders. By concluding the contract, the customer assures that he is a trader and that the short messages are sent as part of his business.” [...] “The customer is solely responsible for the operation, marketing and permissibility of the operated services using seven.io’s gateway.” [...] “The customer assures not to forward any messages to the Gateway or any other seven.io applications that violates any laws or rights of third parties.” [...] “The customer must observe the national and international copyright, patent, name and trademark rights as well as other industrial property rights and personal rights of third parties.”

## Plan

- Pay: $0

## Speed

- Answer: in the call

## The call

- You send: number
- Method: GET
- Path: /api/lookup/format

## About the plan

- Plan: Free
- Who can get it: any seven account, traders only: the customer assures that he is a trader and that the short messages are sent as part of his business

## The 9 fields the plan's answer can hold

success, national format, international format, formatted number, country, country calling code, country code, carrier, line type

## seven.io's plans (1)

- [seven.io, free](https://datacircle.dev/cached-phone-validation-apis/seven-io/free/llms.txt): $0.00 per 1,000, 56% complete, stored

## seven.io's calls (1)

- `GET /api/lookup/format`: [seven.io, free](https://datacircle.dev/cached-phone-validation-apis/seven-io/free/llms.txt)

## seven.io's APIs (2)

- [seven.io: phone validation API pricing, 2 plans, GET /api/lookup/cnam](https://datacircle.dev/validate-phone-apis/seven-io/free-test-credit-get-api-lookup-cnam/llms.txt)
- [seven.io: phone validation API pricing, 2 plans, GET /api/lookup/hlr](https://datacircle.dev/validate-phone-apis/seven-io/free-test-credit-get-api-lookup-hlr/llms.txt)
- [seven.io: phone validation API pricing, 2 plans, GET /api/lookup/mnp](https://datacircle.dev/validate-phone-apis/seven-io/free-test-credit-get-api-lookup-mnp/llms.txt)
- [seven.io: cached phone validation API pricing, 1 plan](https://datacircle.dev/cached-phone-validation-apis/seven-io/free/llms.txt)

## seven.io: cached phone validation API alternatives

- [Neutrino API, free](https://datacircle.dev/cached-phone-validation-apis/neutrino-api/free/llms.txt): $0.00 per 1,000, 67% complete, stored
- [Strale, free](https://datacircle.dev/cached-phone-validation-apis/strale/free/llms.txt): $0.00 per 1,000, 56% complete, stored
- [Botoi, free](https://datacircle.dev/cached-phone-validation-apis/botoi/free/llms.txt): $0.00 per 1,000, 44% complete, stored
- [Trestle, free](https://datacircle.dev/cached-phone-validation-apis/trestle/free/llms.txt): $0.00 per 1,000, 56% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-25.

- https://docs.seven.io/en/rest-api/endpoints/lookup
- https://www.seven.io/en/company/terms
- https://www.seven.io/en/prices
- https://www.seven.io/en/products/number-validation/cnam-lookup
- https://www.seven.io/en/products/number-validation/format-lookup
- https://www.seven.io/en/products/number-validation/hlr-lookup
- https://www.seven.io/en/products/number-validation/mnp-lookup