Cover	3 Months Ended
	Mar. 31, 2025 $ / shares shares
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2025
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2025
Current Fiscal Year End Date	--12-31
Entity File Number	001-41344
Entity Registrant Name	METAL SKY STAR ACQUISITION CORPORATION
Entity Central Index Key	0001882464
Entity Tax Identification Number	00-0000000
Entity Incorporation, State or Country Code	E9
Entity Address, Address Line One	221 River Street
Entity Address, Address Line Two	9th Floor
Entity Address, City or Town	Hoboken
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07030
City Area Code	(332)
Local Phone Number	237-6141
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
Elected Not To Use the Extended Transition Period	false
Entity Shell Company	true
Entity Common Stock, Shares Outstanding | shares	3,757,451
Entity Information, Former Legal or Registered Name	Not Applicable
Entity Listing, Par Value Per Share | $ / shares	$ 0.001
Units, each consisting of one Ordinary Share, $0.001 par value, one redeemable warrant, and one right
Title of 12(b) Security	Units, each consisting of one Ordinary Share, $0.001 par value, one redeemable warrant, and one right
Trading Symbol	MSSUF
Ordinary Shares, $0.001 par value
Title of 12(b) Security	Ordinary Shares, $0.001 par value
Trading Symbol	MSSAF
Redeemable warrants, each warrant exercisable for one Ordinary Share at an exercise price of $11.50 per share
Title of 12(b) Security	Redeemable warrants, each warrant exercisable for one Ordinary Share at an exercise price of $11.50 per share
Trading Symbol	MSSWF
Rights to receive one-tenth (1/10th) of one Ordinary Share
Title of 12(b) Security	Rights to receive one-tenth (1/10th) of one Ordinary Share
Trading Symbol	MSSRF