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TPS / CTPS API

Screen phone numbers against the TPS and CTPS lists using a JSON API.

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TPS/CTPS API is a JSON API service operated by I Want That Ltd that screens phone numbers against the UK Telephone Preference Service (TPS) and Corporate Telephone Preference Service (CTPS) before outbound calls. It addresses the legal responsibility businesses and charities face to avoid calling numbers registered on these lists.

The service accepts batches of up to 10,000 records per request at a stated rate of roughly 10,000 records per second. It provides access to historical registration dates for numbers on the TPS and CTPS, dating back over a decade. Documentation, integration guidance, and customer support are available.

The service is aimed at businesses and charities making outbound calls. It is packaged around credit purchases, with credits not expiring and loyalty credits added to each purchase. Bespoke pricing is available by contacting the team.

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