Developers
APIs for developers
Integrate communication and AI into your applications with REST APIs: SMS, WhatsApp, call analytics, transcription, AI voice (TTS), content generation, OCR and summarization. And the best part: you pay per minute or per use, with no token counting.
You pay per minute or per use, never per tokens. No token math and no surprises on your bill: clear, predictable pricing across our AI APIs.
Our APIs
One API for every channel
/api/v1/sms SMS API
Send SMS worldwide from your applications, with reliable delivery and status reports. Receive SMS from multiple countries (check the coverage list).
From €0.045 per SMS/api/v1/analytics Call Analytics API
Automatic analysis of calls and conversations with AI: summary, scoring and sentiment analysis.
Included in plans with AI/api/v1/whatsapp WhatsApp API
Integrate WhatsApp into your systems: message sending, templates and automations for support and sales.
Included with the WhatsApp + API plan (€25/month)/api/v1/transcribe Premium Transcription API
Highest-accuracy speech-to-text transcription, multilingual, with punctuation and speaker separation. Built for production.
Pay per transcribed minute/api/v1/whisper Whisper Transcription API
Speech-to-text transcription with the Whisper model. Available now, ideal for large volumes with great value for money.
Per minute, no tokens/api/v1/tts AI Voice API (TTS)
Turn text into natural voice in multiple languages and voices. Generate audio for your IVR, notifications or voice assistants.
Per minute of audio, no tokens/api/v1/content Content Generation API
Give it the social network, the topic and the author, and it generates the text tailored to the platform along with a custom image, ready to publish.
Flat price per post, no tokens/api/v1/ocr OCR API
Extract text and structured data from images and documents (invoices, ID cards, forms) to automate data entry into your systems.
Price per document, no tokens/api/v1/summarize Summarization API
Automatically summarize long texts, conversations or documents and extract the key points, in the language you need.
Pay per use, no tokensGetting started
From zero to production in minutes
Request your API key, check the documentation with the endpoints and code examples, and start integrating. Clean REST APIs, with JSON responses and developer support.
# Send an SMS with the REST API
curl -X POST https://api.universaltelecom.eu/api/v1/sms \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"to": "+34600000000",
"text": "Hello from Universal Telecom"
}'Frequently asked questions
Questions about the APIs
What can I do with the Universal Telecom APIs?
Integrate communication and AI into your applications: send SMS and WhatsApp messages, analyze calls with AI, transcribe speech to text (premium highest-accuracy engine or Whisper), turn text into natural voice (TTS), generate content for social networks with text and image, extract data from documents with OCR and summarize texts automatically, all through REST APIs.
How do you bill the AI APIs?
Our strong point is honest pricing: you pay per minute or per use, never per tokens. Transcription and AI voice (TTS) are billed per minute, and content generation per post. No token counting and no surprises on your bill.
How do I start using the API?
Request your API key by contacting us. You will receive the credentials and the documentation with the endpoints, code examples and a full reference so you can start integrating in minutes.
What is the difference between the Premium Transcription API and Whisper?
The Premium Transcription API offers the highest accuracy, multilingual, with punctuation and speaker separation, and is billed per transcribed minute. The Whisper API uses the Whisper model, is available now and offers excellent value for money for large volumes. Both are charged per minute, no tokens.
What does the Content Generation API do?
You tell it the social network, the topic and the author, and it generates the text tailored to that platform along with a custom image, ready to publish. It is billed at a flat price per post, with no token counting.
Are the APIs REST? Is there documentation?
Yes. They are REST APIs with detailed documentation, code examples and an endpoint reference, plus dedicated developer support.
Shall we build something together?
Request your API key and start integrating SMS, WhatsApp, voice, AI and numbering into your product.