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API for blocking phone calls with Call Control. Data is from crowdsourced community blacklist from 12+ million users and government agencies (FTC, FCC, IRS) Try with api_key 'demo', hit explore above, and then try phone numbers 18008472911,13157244022,17275567300,18008276655,12061231234.

The Cloud‑RF API provides a set of JSON endpoints for performing and managing radio‑frequency propagation analyses, including point‑to‑point and point‑to‑multipoint path profiling, heat‑map creation, clutter data upload, interference and network merging queries, and archival operations such as listing, deleting, and exporting calculations in GIS formats.

The Smartphone Test Farm API provides endpoints to list and retrieve details of real smartphone devices, manage a user's owned devices (including adding, deleting, and viewing them), obtain user profile and access token information, and initiate or terminate remote connections to specific devices.

The sms77.io API provides endpoints for sending SMS messages and voice calls, performing phone number lookups (CNAM, format, HLR, MNP), managing contacts and webhook subscriptions, and retrieving analytics, pricing, balance, and message status information.

The Zoom API is a RESTful interface that enables programmatic management of Zoom platform resources—including accounts and sub‑accounts, users, meetings, webinars, recordings, chat bot messages, Zoom Rooms locations, phone and SIP trunk settings, and various usage and billing metrics.