# Inter X API > Organisation REST API for Know Your Entity (KYE), Know Your Transaction (KYT), Address Prescreening, Wallet Holdings, and USDT blacklist checks. Authenticate with an organisation API key created in the dashboard (Organisation → API keys). Keys start with `ix_live_`. Send `Authorization: Bearer …` or `X-Api-Key` on every request. Base URL: https://theinterx.com/api/v1 KYT screens a transaction hash (typically inbound). Address prescreening screens a destination address and amount before send. Do not use KYT for outbound pre-send checks. ## Docs - [API markdown](https://theinterx.com/docs/api.md): Auth, credits, endpoints, and typical KYT/KYE flows - [OpenAPI 3.1](https://theinterx.com/docs/api/openapi.yaml): Full request and response schemas - [HTML docs](https://theinterx.com/docs/api): Quick start plus rendered OpenAPI - [Interactive reference](https://theinterx.com/docs/api/reference): Standalone ReDoc ## Optional - [Site llms.txt](https://theinterx.com/llms.txt): Product overview and insights - [Pricing](https://theinterx.com/pricing): Credits and plan limits