APIs Tools
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UnitConvert API
Free
UnitConvert API performs precise conversions across measurement systems including metric, imperial, and specialized units used in engineering, cooking, and scientific fields, with support for compound units and unit-aware arithmetic. Applications serving international audiences integrate the API to display measurements in users' preferred systems without maintaining conversion logic internally.
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HolidayCalendar API
Free
HolidayCalendar API provides public holiday data for over 200 countries and regions, including bank holidays, religious observances, and regional variations, with support for determining business day calculations that account for local holidays. Scheduling and logistics applications integrate the API to avoid scheduling deliveries or appointments on days when recipients may be unavailable.
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ProfanityFilter API
Freemium
ProfanityFilter API detects profanity, slurs, and inappropriate language across multiple languages with configurable sensitivity levels and context-aware detection that distinguishes between offensive usage and legitimate discussion of sensitive topics. Community platforms integrate the API for real-time chat filtering with options to mask, block, or flag detected content for review.
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BarcodeLookup API
Freemium
BarcodeLookup API returns product information including name, brand, category, and images from barcode scans, covering UPC, EAN, and ISBN formats across a database of millions of products. Inventory management and price comparison applications use the API to populate product details automatically when items are scanned rather than requiring manual data entry.
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PhoneValidate API
Freemium
PhoneValidate API verifies phone number validity, identifies carrier and line type (mobile, landline, VoIP), and detects formatting issues across international number formats, helping applications avoid sending SMS to invalid numbers or landlines that can't receive texts. SMS marketing platforms integrate the API to clean contact lists before campaigns to reduce delivery costs and improve deliverability rates.
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TextToSpeech MultiVoice API
Paid
TextToSpeech MultiVoice API converts scripts with multiple speaker annotations into audio with distinct voices automatically assigned to each speaker, useful for generating dialogue-heavy content like audio dramas or training scenarios without manually splitting and processing each speaker's lines separately. The API maintains consistent voice assignment across long scripts spanning multiple files.
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Geofence API
Freemium
Geofence API enables applications to define geographic boundaries and receive real-time notifications when tracked devices enter or exit those zones, with support for complex polygon shapes beyond simple radius-based fences. Logistics and field service applications use the API to trigger automated workflows like arrival notifications or geofenced time tracking without building custom location processing infrastructure.
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Terminal Telematics API
Freemium
Terminal is a universal API for telematics data in commercial trucking, often described as the Plaid for fleet intelligence. The platform enables companies building next-generation insurance products, financial services, and fleet software to access GPS data, speeding records, and vehicle statistics through a single standardized integration. Terminal eliminates the complexity of connecting to dozens of different telematics providers, accelerating development for fintech, insurtech companies, and fleet management software vendors serving the trucking industry.
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Merge API Integration Platform
Freemium
Merge is a unified API platform that enables B2B software companies to add hundreds of integrations to their products through a single API connection. Instead of building and maintaining individual integrations with HR systems, ATS platforms, CRM tools, accounting software, and ticketing systems, developers connect once to Merge's unified API and instantly gain access to all supported integrations. Merge's AI-powered data normalization layer handles the differences between data models across providers, automatically mapping fields and resolving inconsistencies so that developers can focus on building product features rather than integration plumbing.
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