AI Diagnostics API for Rapid Differential Analysis

Revolutionizing healthcare with technology. Breaking barriers ... to leave no one behind

DxGPT is the AI that refuses to ask permission to save time and lives

View plans

+500k users worldwide

Unique users on DxGPT.app leveraging this API for clinical diagnosis

82% satisfaction with diagnostic results

Based on over 6,900 votes, users rate the suggested diagnoses as highly useful.

150 K monthly users and rising

DxGPT.app has multiplied its usage over the past 3 months, showing rapid adoption

About us

Fundación 29 is a non-profit tech rebel on a mission to make rare-disease diagnosis accessible to everyone.

We harness breakthrough AI, break down bureaucratic walls and—if needed—ask for forgiveness rather than permission. Because nothing should stand between a patient and a timely answer.

DxGPT is our clinical-grade AI engine for rapid, structured differential diagnosis. GDPR & HIPAA ready – data stays in Azure West EU. Trusted by 500 000+ users across 100 countries with 4.3/5 satisfaction.

DxGPT cuts diagnostic time from hours to seconds — so clinicians focus on care, not paperwork.

What You Can Do with DxGPT

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Submit natural language symptom descriptions

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Receive structured diagnostic suggestions

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Integrate into EHR, apps or patient portals

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Access detailed disease info, follow-up questions, clinical summaries

About DxGPT

Fundación 29 is a non-profit organization using AI to make rare disease diagnosis accessible to everyone. DxGPT is our clinical-grade AI engine for rapid, structured differential diagnosis. GDPR & HIPAA compliant. 500,000+ users in 100 countries.

✅ Submit clinical descriptions in natural language
✅ Receive structured diagnostic suggestions
✅ Integrate into EHR, apps or portals
✅ Access detailed info, follow-up questions and clinical summaries

Want to know more? Visit our About Us page or check our FAQ

If you need to contact us, you can do so easily using the contact form at the bottom of the About Us page.

How does it work?

DxGPT's medical API analyzes clinical descriptions and suggests possible differential diagnoses. Fast responses, multilingual, data protection and easy integration.

POST /api/diagnose
{
  "description": "13-month-old patient. First focal seizure at 3 months. Multiple tonic-clonic seizures. Febrile seizures. One status epilepticus at 8 months.",
  "myuuid":"550e8400-e29b-41d4-a716-446655440000",
  "timezone":"Europe/Madrid",
  "model":"gpt4o"
}

Available Plans

Freemium

Free

50 calls/day
2 RPS
Uses GPT-4o model
Ideal for testing

Pro

Pay as you go

200 RPM, 1000 calls/day
Access to all models (GPT-4o, o3, gpt5, gpt5mini, gpt5nano)
For professionals and advanced use
💰 Transparent Usage-Based Pricing:
✅ Pay only for actual costs - No fixed fees per call
✅ Daily billing - Usage is calculated and billed daily
✅ Monthly invoices - Automatic invoice generation at month end
How it works: We track your real API costs (tokens, model usage, translations, etc.) throughout the day. Each day, we calculate your total usage costs, and add it to your monthly invoice. You only pay for what you actually use.
💡 Cost varies by model and usage. More efficient models (like gpt5mini) cost less than premium models (like o3). You're charged based on actual token consumption, not fixed rates.
⚠️ Language note: If your input is not in English, additional translation costs will apply. Processing in other languages (e.g., Spanish) requires translation services, which increases the total cost per operation.
💵 Example costs (diagnosis operation):
• English input: ~$0.004-0.007 per operation
• Spanish input: ~$0.049-0.054 per operation
Note: Costs vary based on description length, model selected, and whether anonymization is required.