v3.26.1
Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 12, 2026
Document Information Line Items    
Entity Central Index Key 0002080215  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Fiscal Year Focus 2026  
Document Transition Report false  
Entity Registrant Name StablecoinX Inc.  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-43372  
Entity Tax Identification Number 39-3052555  
Entity Address, Address Line One 6160 Warren Parkway  
Entity Address, Address Line Two Suite 100  
Entity Address, City or Town Frisco  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 75034  
City Area Code (302)  
Local Phone Number 803-6849  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Amendment Flag false  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Class A Common Stock, par value $0.0001 per share    
Document Information Line Items    
Title of 12(b) Security Class A Common Stock, par value $0.0001 per share  
Trading Symbol USDE  
Security Exchange Name NASDAQ  
Warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50 per share    
Document Information Line Items    
Title of 12(b) Security Warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50 per share  
Trading Symbol USDEW  
Security Exchange Name NASDAQ  
Class A Common Stock    
Document Information Line Items    
Entity Common Stock, Shares Outstanding   24,029,375
Class B Common Stock    
Document Information Line Items    
Entity Common Stock, Shares Outstanding   3,157,754