# TG Validator

> TG Validator is a Telegram number validation platform. It checks whether a phone number is registered on Telegram through a web dashboard and a synchronous REST API.

## Products

- Telegram Registration Check (`tg`): confirms whether a phone number is registered on Telegram.

## API

- Endpoint: `POST /api/v1/check`
- Authentication: API key from the dashboard
- Request field: `service_type` must be `tg`
- Main response field: `registered`

## Pricing

TG Validator uses one-time balance top-ups. A rate-limited public registration demo is available without signing in, and registered users can contact support to ask about trial balance. Balance is charged only for completed checks; failed or undetermined checks are refunded automatically.

## Important Notes

- TG Validator does not check online status, last seen, display name, chat history, or message content.
- Failed or undetermined checks are refunded automatically.
- The API path is `/api/v1`.

## Methodology and Guides

- [How verification works](https://tgvalidator.com/how-it-works): request lifecycle, billing, refunds, limits, and interpretation boundaries.
- [E.164 phone number format](https://tgvalidator.com/guides/e164-phone-number-format): normalization rules and examples for API input.
- [Result interpretation](https://tgvalidator.com/guides/result-interpretation): registered, unregistered, invalid, and retryable states.
- [Contact list cleaning](https://tgvalidator.com/use-cases/contact-list-cleaning): an auditable workflow for normalization, verification, and routing.

## Blog

- [Blog](https://tgvalidator.com/blog): practical articles about Telegram registration checks, identifier design, privacy boundaries, and contact-data workflows.