Best Lubricant for Door Hinges: Top Picks for Silent Doors

Every time you open a door, a sharp squeak breaks the quiet. Hinges grind and creak, making simple movements irritating. The constant noise drains your patience fast.

WD-40 Specialist Silicone Spray uses fast-drying foam to lubricate without stickiness. Houdini Lock Lube features a greaseless formula that penetrates deeply and leaves no residue.

Gear Hugger Eco-Friendly Spray targets those wanting a durable, plant-based solution that also protects against rust.

Effective Lubricants to Keep Door Hinges Smooth and Quiet

Unlock the secret to hassle-free door movement with lubricants designed to eliminate squeaks and prevent corrosion. Explore versatile options that ensure flawless hinge operation.

1. WD-40 Specialist Silicone Lubricant Spray with SMART STRAW—Versatile Protection 11 OZ

Spraying a thin, clear film, this WD-40 Specialist formula glides smoothly across metal, rubber, plastic, and vinyl surfaces.

It tackles squeaky hinges and stiff locks alike, offering professional-grade lubrication and a reliable barrier against moisture and corrosion.

Engineered with triple-action ingredients, it dries quickly without leaving behind any sticky residue—ensuring your door hardware doesn’t attract dirt or grime over time.

The innovative SMART STRAW design provides flexible application, letting you switch easily between a wide spray and a precise targeted stream.

From chains and pulleys to cables and valves, this lubricant adapts to various maintenance needs while handling temperatures up to 500°F.

WD-40 Specialist’s trusted formula combines efficiency with lasting protection so you spend less time wrestling with noisy, resistant hardware.

Best for: Homeowners aiming for hassle-free upkeep on a range of mechanical parts and surfaces.

Pros:

• Multi-surface compatibility including non-metal materials
• Non-sticky, fast-drying protective coating
• Versatile SMART STRAW spray options
• Resists moisture and corrosion effectively
• High temperature tolerance for demanding environments

Cons:

• Spray can format might require careful use to avoid overspray
• Formula designed mainly for lubrication, may need reapplication in extremely harsh conditions

2. Houdini Lock Lube Professional Spray 11 oz – Greaseless Cleaner & Protector for Locks and Hinges

Penetrating deeply into stubborn mechanical parts, this lubricant spray revitalizes smooth motion and banishes sticking in locks and hinges. The Houdini Lock Lube uses a greaseless formula free from oils, graphite, and silicone, ensuring no sticky residues build up over time.

Gentle enough for electronics, it boasts a dielectric property that protects sensitive components by not conducting electricity. This makes it an ideal choice around electronic locks and switches.

Combining lubrication with rust prevention, it displaces moisture and guards against corrosion even in harsh environments like salty air or freezing temperatures. The anti-friction and anti-wear properties help keep your hardware functioning flawlessly for longer.

The versatile spray reaches tight spaces in locks, latches, bearings, and hinges effortlessly. Trusted by professionals for over four decades, Houdini delivers a cleaner, longer-lasting lubrication experience without the typical buildup issues.

Best for: Homeowners and locksmiths seeking reliable, residue-free lubrication and protection for both mechanical and electronic door components.

Pros:

• Fast-acting, deep-penetrating cleaner and lubricant
• Greaseless, graphite-free, and silicone-free for no sticky buildup
• Safe for use on electrical and electronic parts
• Anti-rust and corrosion protection in tough conditions
• Trusted by locksmiths for over 40 years

Cons:

• Might require repeated applications in extremely dirty or corroded locks
• Low to medium viscosity may not suit heavy-duty industrial hinge lubrication needs

3. Gear Hugger Eco-Friendly Multipurpose Spray with Rust Protection and Heavy-Duty Lubrication

Maintaining smooth motion on sticky or squeaky hinges can feel like a never-ending task, especially if traditional lubricants leave you frustrated with their limited effect and harsh chemicals. Gear Hugger offers a plant-based solution that goes beyond mere lubrication, combining a powerful blend of penetrating oils and corrosion inhibitors.

Experience enhanced operation with a spray that delivers twice the lubricating power of typical lock and door lubricants. Gear Hugger’s formula penetrates deep to loosen rust and grime, making it a reliable choice for both garage doors and delicate metal joints.

Designed with sustainability in mind, this eco-friendly spray replaces petroleum and PTFE chemicals with USDA Certified 96% bio-based ingredients, reducing environmental impact without compromising performance. Its non-toxic nature means it is safe for use around children and pets while remaining potent against sticky, squeaky hinges.

The convenient two-way straw nozzle offers precise control, allowing you to apply the lubricant exactly where needed for uniform coverage. Gear Hugger truly stands out as a multi-functional spray suitable for various home and outdoor maintenance tasks.

Best for: Homeowners and eco-conscious DIY enthusiasts seeking a sustainable, high-performance lubricant to restore and protect door hinges and other metal parts around the house.

Pros:

• Plant-based, non-toxic formula safe for family and pets
• 2X more lubricating power than conventional sprays
• Acts also as rust remover, degreaser, and corrosion inhibitor
• Two-way straw nozzle for precise and easy application
• USDA Certified 96% bio-based ingredients for environmental safety

Cons:

• May require multiple applications on extremely rusted or damaged hinges
• Plant-based ingredients might differ in scent and feel compared to traditional lubricants, which could require an adjustment period

4. LIQUIDFIX Multi-Use Door and Lock Lubricant with Precision Dropper for Squeak-Free Hinges

Doors that creak or locks that stick often disrupt your peace without warning. LIQUIDFIX offers a tailored solution featuring both a 4 oz dropper and a precise 0.5 oz needle oiler to tackle these common nuisances with accuracy.

Providing long-lasting quiet operation for both hinges and sliding door tracks, this lubricant tackles squeaks immediately while protecting moving parts. Its winter-ready formula keeps mechanisms smooth even in temperatures as low as -55°F, ensuring functionality year-round.

Crafted with versatility in mind, you can apply the lubricant easily on a variety of door hardware, car hinges, and stubborn locks, reducing friction and preventing wear. The inclusion of two bottle sizes enhances both broad and detailed applications, facilitating routine maintenance or pinpoint fixes.

LIQUIDFIX stands out as a reliable brand committed to elevating your home upkeep routines with precision application tools and formula strength that lasts. Say goodbye to irritating noises by protecting your moving parts efficiently and effectively.

Best for: Homeowners aiming to maintain smooth-operating doors and locks throughout changing seasons.

Pros:

• Included dual bottles for both broad and precise application
• Freezing-point resistant formula ideal for cold weather use
• Works quickly to eliminate squeaks and stickiness
• Multi-purpose use across doors, locks, and sliding tracks
• Compact and easy to apply with specialized needle oiler

Cons:

• Needle bottle size might require replenishing for frequent use

5. WD-40 Specialist Silicone Spray Twin-Pack – Dual-Action Smart Straw, 11 OZ Each

Maintaining smooth door movement often hinges on choosing a lubricant that offers more than just basic slickness. WD-40 Specialist Silicone Spray stands out by delivering a quick-drying, non-messy formula that protects without leaving a residue behind.

Designed specifically for both metal and non-metal surfaces, including rubber, plastic, and vinyl, it ensures lasting waterproofing and lubrication. Its foam-based spray makes it ideal for precision application, reducing waste and overspray.

With the innovative dual-way Smart Straw, the brand provides versatility, allowing you to target tight spaces or cover broader areas efficiently. Operating at up to 500 degrees Fahrenheit, it handles temperature extremes while preventing rust and protecting outdoor equipment.

WD-40 Specialist has blended function with ease of use in this twin-pack, making it a straightforward choice for anyone tackling routine maintenance or stubborn mechanical parts.

Best for: Homeowners and DIY enthusiasts requiring dependable lubrication for diverse surfaces and quick application without mess.

Pros:

• Dual spray options for precise or wide coverage
• Safe on rubber, vinyl, and plastic materials
• Fast-drying with no sticky residue
• Effective rust prevention on metal surfaces
• Operates well under high temperatures

Cons:

• Foam form might not suit all lubrication needs requiring liquid consistency
• The 11 oz can size may require multiple cans for very large projects

6. Qucship 1 oz Needle Oiler for Precise, Long-Lasting Mechanical Lubrication

Squeaky hinges can disrupt calm moments and wear down your patience. Qucship’s specialized formula penetrates tight spaces with its precise needle oiler design, allowing you to target the source of friction without mess. A few drops deliver instant relief from noise and resistance, getting doors and locks moving freely again.

Beyond just silencing squeaks, this lubricant builds a protective barrier against rust and corrosion that extends the life of your hardware. Rated to perform effectively even at extreme temperatures as low as -55°F, it ensures your mechanisms stay smooth year-round, indoors and out.

Designed for versatility, the Qucship oil works wonders not only on doors but also on bike chains, tools, and bearings, making it a handy all-around solution. Its non-toxic, odorless formula ensures safe application in any home environment without risk or fuss.

By choosing Qucship, you get a precise, long-lasting lubricant that eliminates frustrating noises and sticking with ease, promising peace and smooth operation at every turn.

Best for: Homeowners and DIY enthusiasts looking to restore silent efficiency and protect various mechanical parts with pinpoint application.

Pros:

• Targeted application with a fine needle oiler for hard-to-reach spots
• Provides immediate and enduring lubrication
• Contains rust inhibitors to prevent corrosion
• Performs reliably in extreme cold conditions
• Safe, non-toxic, and odor-free formula

Cons:

• Small 1 oz size may require frequent replenishment for extensive use

7. AGS DE-2 Lube Stick for Smooth Door and Car Mechanism Movement

Addressing the hassle of squeaky, stiff doors starts with applying an easy-to-use lubricant truly designed for diverse door-related components. AGS DE-2 Door Ease Lube Stick provides consistently smooth operation even in varying weather conditions, which keeps mechanisms sliding effortlessly without frequent reapplications.

Its grease form is specifically formulated to penetrate and protect all exposed surfaces, including door hinges, sliding door channels, and window tracks. You won’t struggle with messy oils since this product is clean and straightforward to apply, fitting neatly into tight areas with precision.

Typical use cases extend beyond home entryways—it works for car door fittings, trunk and hood latches, curtain rods, and even power and handsaw blades. The AGS brand ensures reliable performance that resists washing away or drying out.

Expect long-lasting lubrication that eliminates noise and reduces wear, maintaining alignment and ease of movement in mechanical joints. Its compact tube packaging makes targeted applications hassle-free, making it an ideal tool for maintaining smooth functionality across many household and automotive hinges.

Best for: Homeowners and vehicle enthusiasts needing lasting lubrication tailored for hinges, sliding doors, and tricky hardware fixings.

Pros:

• Effective in all weather conditions
• Grease formula stays in place longer than oils
• Clean application minimizes mess
• Versatile use on various door and hardware components
• Compact, easy to carry tube

Cons:

• May require reapplication in heavy-use scenarios
• Stick form might be less suited for extremely tight or recessed hinge areas for some users

8. BTAS Premium Door and Lock Lubricant Oil with Precision Needle Applicator 1 oz

Struggling with persistent squeaks and stiff metal parts around your home can be surprisingly frustrating. BTAS offers a straightforward remedy with its expertly formulated oil designed specifically to tackle those nagging noises. Its advantage lies in long-lasting lubrication combined with effective rust protection, ensuring smooth operation for various household mechanisms.

The precision needle applicator allows you to target tight spots without mess or waste, making it simple to apply just the right amount exactly where it’s needed. This level of control is crucial to maintain small moving parts, from locks to hinges, without overapplication.

Versatility sets this formula apart. Beyond keeping doors silent, it excels on fans, drawer slides, and even delicate tools, making it a handy addition to your maintenance kit. The non-toxic, odorless composition means it’s safe for indoor use and won’t introduce harsh fumes.

Backed by BTAS’s thoughtful design, it delivers reliable performance with less hassle. Whether dealing with squeaky keyholes or creaky hinges, this lubricant ensures smooth motion and reduced wear on metal components exposed to humidity or friction.

Best for: Homeowners seeking precision lubrication for locks, hinges, and delicate metal parts prone to squeaking or sticking.

Pros:

• Precise application via needle spout reduces mess and waste
• Protects metal parts against rust and wear over time
• Safe, non-toxic, and odorless for indoor use
• Multipurpose use across various household and mechanical items
• Extends lifespan of locks and hinges by minimizing friction

Cons:

• Smaller 1 oz volume might require frequent reapplication for heavy users
• Needle applicator may be delicate for rougher handling

9. Lemenyaa Precise Silicone Oil Lubricant with No-Drip Nozzle for Smooth Door Operation

Applying lubricant can often be a messy task, but the Lemenyaa solution changes that by allowing pinpoint accuracy with its needle-tip applicator. Its design ensures controlled, drip-free application that reaches exactly where friction slows your doors down.

Engineered with a silicone formula, it not only quiets those persistent creaks and squeaks instantly but also provides a protective barrier against rust and moisture on metal surfaces. The long-lasting smoothness you get means fewer reapplications compared to traditional sprays.

Since it’s completely odorless and safe for indoor use, it fits well in homes with kids and pets, avoiding harsh chemical fumes. The unique smart storage slot for the nozzle ensures you always have the right tool nearby without losing it.

With the capability to lubricate hinges, locks, sliding tracks, and garage doors, this small bottle packs a powerful punch for reducing noise and wear in multiple areas of your home.

Best for: Homeowners needing precise, clean lubrication to maintain quiet and smooth door and locking mechanisms.

Pros:

• Precision needle-tip for exact application with no mess
• Built-in storage slot for nozzle keeps applicator handy
• Odorless, non-toxic formula safe for children and pets
• Protects metal surfaces from rust and wear
• Effective on multiple uses including sliding doors and locks

Cons:

• Smaller 2-ounce size may require frequent replenishment for extensive use
• Low viscosity might not suit heavy-duty lubrication needs for some users

10. Blaster Advanced Silicone Spray for Smooth and Quiet Door Mechanisms

Maintaining the seamless movement of your garage doors and hinges often feels like an endless battle against squeaks and wear. Blaster delivers long-lasting lubrication that curbs friction and ensures components operate quietly and smoothly over time. Its aerosol spray design penetrates tight gaps with precision, reaching every hinge and roller effortlessly.

Formulated with advanced silicone, this lubricant acts as a resilient shield, repelling moisture and minimizing dust accumulation. You’ll find it safely protects metal, plastic, and rubber parts alike, reducing risks of rust and corrosion that typically shorten equipment lifespan.

The lightweight, non-staining finish means no greasy mess or overpowering odors interrupt your workspace comfort. Ideal for both residential and commercial garage setups, Blaster seamlessly fits a wide range of door mechanisms while leaving a clean surface.

Incorporating Blaster into your routine helps extend the life of moving parts, while its easy spray application makes maintenance less of a chore. Experience smoother door action without fuss or residue interfering.

Best for: Homeowners and technicians needing reliable, moisture-resistant lubrication for garage doors and moving hardware.

Pros:

• Penetrates tight spaces for thorough coverage
• Repels moisture and resists dust buildup
• Safe on multiple materials including rubber and plastic
• Leaves clean, non-staining finish
• Low odor for comfortable indoor use

Cons:

• Might require reapplication in very high-use environments
• Aerosol format may not suit all users preferring manual lubricants

Key Specs Compared: Top Lubricants for Door Hinges

Product Name	Material	Liquid Volume	Viscosity / Grade	Temperature Rating
WD-40 Specialist Silicone Spray	Foam	325 mL	0W	Upper: 500°F
Houdini Lock Lube Spray	Composite	1 L	Low to Medium	Not specified
Gear Hugger Eco-Friendly Spray	96% Biobased	22 fl oz	Not specified	Not specified
LiquidFix Door & Hinge Oil	Metal	4.5 fl oz	Not specified	Lower: -55°F
WD-40 Specialist Silicone Twin-Pack	Foam	11 fl oz	0W	Upper: 500°F
Qucship Needle Oiler	Oil	28.3 mL	5W-30	Lower: -55°F
AGS DE-2 Lube Stick	Plastic	0.4 fl oz	Grease	Works under all weather
BTAS Lubricant Oil	Oil	1 fl oz	0W	Upper: 248°F

How to Choose the Best Lubricant for Door Hinges That Actually Works?

Finding the right lubricant for door hinges isn’t just about quieting squeaks. It’s about selecting a product that matches your door’s material, environment, and use to ensure lasting smoothness. Several factors come into play that can make or break your doors’ performance over time.

Lubricant Composition and Compatibility

The makeup of a lubricant determines how well it interacts with your door hinges and surrounding materials. Lubricants come in forms like oils, greases, silicone sprays, and composite blends. Each has unique qualities—silicone sprays, for instance, glide smoothly over metal, rubber, and plastic without leaving sticky residue.

Technically, silicone lubricants create a thin, non-stick film that repels moisture and dirt, extending hinge life. Oils penetrate deeply, reducing friction inside hinges, while greases offer thicker protection for high-load points. Some formulas, like eco-friendly biobased sprays, avoid harsh chemicals and balance lubrication with corrosion inhibition.

Ignoring lubricant composition risks incompatibility damage such as sticky build-up or material deterioration. Using an oil where silicone is required can attract grime, while grease might gum up delicate mechanisms, leading to squeaks returning or even hinge failure.

Application Precision and Delivery Method

The way you apply lubricant plays a big role in how well it works. Using tools like needle oilers or narrow straws helps target the exact spots, like hinge pivots, where friction happens. This kind of precise application ensures the lubricant reaches deep into tight spaces without waste.

Most spray lubricants cover a wide area but can miss small crevices or soak the surface too much if not aimed carefully. Foam sprays give you more control with less overspray, making them ideal for tricky spots. Solid lubricant sticks are neat and mess-free but require spreading, which might not get lubricant deep enough.

If you don’t apply lubricant precisely, some friction points stay dry, causing squeaks and rough motion. On the other hand, too much lubricant traps dust and grit, turning slick hinges into sticky, noisy problems.

Temperature Range and Environmental Resistance

Door hinges face all kinds of weather, so choosing a lubricant that handles temperature swings is key. Some lubricants work well from freezing cold to intense heat, with ratings as low as -55°F and as high as 500°F. This range lets your hinges stay smooth no matter the season.

The magic lies in the lubricant’s formula. Base oils combined with special additives stop it from thickening in cold weather or breaking down when it’s hot. For instance, a 0W viscosity grade keeps the lubricant flowing evenly, providing reliable protection through every temperature change.

If you pick a lubricant that can’t handle your environment, expect problems like thick residue buildup, quick evaporation, or sticky hinges. That means more squeaks and frequent fixes, turning simple maintenance into a chore.

Residue and Cleanliness After Application

How a lubricant behaves once applied is key to maintaining door hinges over time. A product that leaves behind a clean, non-sticky residue will help hinges function smoothly and reduce frequent maintenance. The presence of sticky or greasy buildup can cause parts to attract dirt, slowing movement and raising repair needs.

Many silicone-based lubricants offer a quick-drying, residue-free finish that minimizes grime collection. In contrast, oil-based options often leave a slick surface that easily traps dust and debris. Some greaseless sprays keep hinges clean but may need to be reapplied more often. Specialized formulas balance staying clean with corrosion-resistant properties for longer hinge life.

Ignoring residue concerns can lead to dirty, gummy hinges that squeak excessively and wear down faster. This means more elbow grease to clean and more frequent lubrication, defeating the purpose of using a good lubricant.

Rust and Corrosion Protection

Door hinges are always at risk from moisture and weather, so rust protection is essential when picking a lubricant. Without it, metal hinges start to corrode, making doors creak and stick. This factor can make or break your door’s smooth operation.

Lubricants with corrosion inhibitors work by forming a thin barrier that keeps oxygen and water away from metal surfaces. For instance, penetrating oils and specific sprays fuse rust prevention with slick lubrication, allowing hinges to stay quiet and easy to move even in wet environments.

Neglecting rust protection leads to corrosion and pitting on hinges, causing stiff movement and noisy doors. Over time, this damage can become permanent, forcing costly repairs or full replacements that strong lubricants would have prevented.

Viscosity and Lubricant Thickness

Viscosity is the measure of a lubricant’s thickness and plays a crucial role in how it performs on door hinges. It determines how easily the lubricant moves through the hinge’s tight spaces and how long it stays effective. Thin oils seep quickly into joints offering immediate squeak relief, whereas thicker greases stick around longer but can hinder smooth motion if too much is applied.

Every lubricant has a viscosity rating, showing how it flows at different temperatures. For example, a light oil with a low viscosity works best for precision locks or delicate parts. On the other hand, a heavy grease suits hinges that face more weight and frequent use, offering long-lasting protection.

Ignoring viscosity can lead to problems like insufficient lubrication, causing parts to wear faster, or excessive resistance that makes doors harder to open. Picking the right thickness ensures smoother operation and less frequent maintenance, improving door longevity and user experience.

Longevity and Reapplication Frequency

Choosing lubricants with strong longevity means fewer touch-ups and more consistent performance. This factor is crucial because a lubricant’s lasting power directly affects how often you’ll need to revisit your door hinges, saving both time and hassle. A good lubricant penetrates quickly but leaves behind a protective layer that stands up to daily friction and weather.

Many advanced lubricants use ingredients like silicone or synthetic oils that resist evaporation and washing away. For example, silicone sprays dry fast yet create a thin, tough film that won’t drip or attract dirt. Some greaseless oils stay stable under heat, preventing them from drying out. Plus, applicators that deliver the right amount prevent waste, helping the lubricant last longer.

Failing to prioritize longevity means more frequent reapplications and extra upkeep. This not only leads to noisy, stiff hinges but also ramps up your maintenance time and costs over the long haul.

Frequently Asked Questions

What makes silicone sprays like WD-40 Specialist ideal for door hinges?

Silicone sprays such as WD-40 Specialist form a thin, water-resistant coating that helps hinges move smoothly by preventing rust and repelling moisture. This layer reduces friction without leaving sticky residue, which keeps the door operating quietly and efficiently.

They work effectively on metal and are safe for rubber and plastic parts often found in door mechanisms, making them versatile for various hinge types.

Apply with a precise straw for a light, even coat. Avoid over-spraying to prevent dirt buildup and ensure lasting hinge performance.

How does a greaseless lock lubricant differ from traditional oils?

Greaseless lubricants provide smooth operation without the sticky residue that traditional oils leave behind. They avoid oily buildup, which can attract dirt and cause locks to jam over time. This cleaner approach keeps your lock mechanisms running more reliably.

Many greaseless formulas contain no oils, graphite, or silicone, making them ideal for delicate parts. Their dielectric properties ensure they won’t conduct electricity, so they’re safe for electronic locks and sensitive components.

Apply greaseless lubricants when precision is needed, especially around electronics, to prevent damage and keep your locks hassle-free.

Are eco-friendly lubricants effective on stubborn or weather-exposed hinges?

Eco-friendly lubricants use plant-based oils and additives that fight rust and reduce friction effectively. They handle tough, weather-exposed hinges by keeping parts moving smoothly without harsh chemicals.

These lubricants often offer comparable performance to conventional ones, with the bonus of better corrosion resistance in outdoor conditions. They also reduce environmental impact, making them a popular choice.

For best results, pick products with biodegradable ingredients and remember to reapply periodically, especially after rain or heavy use.

Why use a precision dropper or needle oiler for door hinges?

Tools like LIQUIDFIX’s dropper or Qucship’s needle oiler allow you to deliver lubricant exactly where it’s required. This focused method ensures your hinges stay smooth while avoiding product waste and mess.

These devices reach tight spots and hidden pivot points, which is crucial to prevent rust and eliminate pesky squeaks inside the hinge.

For optimal performance, apply lubricant slowly in small amounts to prevent over-oiling, which can attract dirt and cause buildup over time.

When is a grease-based lube stick preferable over sprays or oils?

Grease-based lube sticks are perfect for doors needing solid, long-lasting protection. Their thick texture clings well, making them better than sprays or oils in the face of moisture and tough weather.

Because of its sticky nature, this grease holds fast to metal hinges, reducing friction and wear even in chilly or damp conditions.

Apply only a small amount to metal parts; keep it away from paint or plastics to avoid mess and stains.

Ensuring Smooth and Silent Door Hinges

Selecting the proper lubricant transforms noisy, stiff hinges into effortless, quiet pivots, significantly enhancing door operation. The right product reduces friction and inhibits rust, which helps extend hinge longevity and minimizes repair frequency. This choice guarantees consistent performance and reduces the likelihood of future issues.

Synthetic lubricants are ideal for heavy-duty exterior doors, while lightweight oils suit delicate indoor hinges and locks needing precise application. Eco-friendly users might prefer plant-based options, and specialized sprays facilitate targeted lubrication in small, intricate spaces.

Apply lubricant only to thoroughly cleaned hinges to prevent dirt buildup, and avoid excess to maintain smoothness. Be mindful of the door’s material and temperature conditions to ensure the lubricant performs well and preserves hinge functionality over time.

Last update on 2026-10-29 / Affiliate links / Images from Amazon Product Advertising API