Rental API, MCP & Developer Platform

The Lockii developer platform gives you programmatic access to bookings, customers, products, stock, locks, trackers, pricing, maintenance, and reports. It includes a REST API, MCP servers for AI tools, a public Booking API, signed webhooks, and Login with Lockii for apps that act on behalf of a user.

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★★★★★

Trusted By The Best

Built for rental workflows

Practical controls that keep self-service rental secure and paid, without staffing every handover.

“Lockii is the first one that has a workflow very similar to mine except it takes my hands out of it.”

ChristopherOwner, B&S Equipment

Full REST API

Bookings, customers, products, stock, locations, locks, trackers, pricing, maintenance, inbox, and reports.

MCP for AI tools

Claude, ChatGPT, Cursor, and VS Code can work in your account, and support bots can look up bookings.

OAuth for apps that act as a user, plus scoped offline access for apps operators install.

Marketplace apps

List an operator's published inventory, price hires with Lockii, and create bookings after you take payment.

How it works

Three steps from setup to a working self-service workflow, no counter required.

Create a key or sign in
Create an API key under Settings → Integrations → API, or use Login with Lockii to act as a signed-in user.
Pick your surface
Call the REST API, connect an AI tool to the User MCP, give support tools the Customer MCP, or use the public Booking API.
Ship your integration
Use the OpenAPI document, signed webhooks, and app scopes to build integrations other operators can connect.

The API introduction and guides are on help.lockii.app, and the OpenAPI document is public at dash.lockii.app/api/v1/openapi.json.

Send an API key as x-api-key or a Bearer token. Keys are limited to one company. Apps can also use Login with Lockii OAuth.

Yes. Post hour or distance readings for a stock item or meter, and Lockii rechecks maintenance on that unit.

Our Reviews Speak For Themselves

Real stories from businesses with fleets from 1 to 600, transforming their rental operations with Lockii.

Jordan Daish

Founder, JD Trailer Hire

I already used another online booking system, but I didn't know how much better it could get until I swapped to Lockii. Everything I'd been pushing for with my previous provider was already built in. Lockii relieved the burden of being present at every pickup and return, and now I can grow past my yard fence line with fully automated trailer rental. My only regret is not switching earlier.

Charlie Haddad

Operator, Trailer 4 Hire

Lockii has made our business efficient in managing our bookings; saving us a lot of time to focus on the growth of the business. The Lockii system is user friendly, and has many options to meet the needs of our business for future growth.

Ben Keep

Owner, Hatoza Hire

Lockii has significantly reduced complexity and allows me to focus more on running my business. The platform offers an intuitive interface, and the onboarding and ongoing support have been exceptional.

Matt Cole

Founder, Empire Trailer Hire

Since switching to Lockii, things have gotten so much easier. I was juggling three different systems before, and now it's all in one place. It's saved me a heap of time and stress, and I can actually focus on running the business again. The platform's really user-friendly, and the support has been unreal, the team genuinely cares and listens.

Mario Clewlow

Owner, Hitch Haul

Lockii has been a game changer for our trailer rental business. We now offer fully automated, contactless rentals. It's streamlined, secure, and exactly what our business needed to jump in front of our competitors! They are very responsive, knowledgeable, and always looking for ways to help us grow.

Wendelin Fortner

Founder, PurBiker

Lockii has more than halved the on-site staffing costs. Our customers can now start their booking at any time or simply scan the QR code on the spot to book. Thanks to the huge time savings during handover, we can focus fully on the upkeep and maintenance of the e-bikes. What sets Lockii apart is the fast and professional support with setup and new features. The booking overview and analytics make Lockii a future-proof partner as we develop further locations.

Hayden Given

Owner, 208 Trailer Rental

We've been getting more bookings than ever, and the feedback from customers has been outstanding. The platform and booking process are incredibly smooth and easy to use. We've even had customers switch over from competitors specifically because their system was too complicated. This CRM has made a noticeable difference in both customer experience and conversions.

Yvann Karamoko

Operator, The Trailer Co

Lockii has been a game-changer for our business. It's allowed us to operate fully automated, 24/7 trailer rentals and scale that side of our operation with confidence. What's impressed us most isn't just the reliability of the platform, but the pace of innovation. This is a team that listens, iterates, and keeps making an already great product better. Lockii hasn't just supported our growth; it's helped make it possible.

Troy Hunt

Founder, Croc Hire

Lockii gave me the ability to work on the business instead of being stuck in it. I now have more time back to expand, and my customers have shared how easy it is to use. I will keep expanding now that I have Lockii. It's simple, easy, and the people behind it truly listen and take on feedback.

Eric Scherer

Founder, KP's Trailers

If you are looking for a 100% hands off rental processing system with the easiest backend, smoothest customer booking and payment systems, best customer service and support in the industry, then you are in the right place. Lockii changed my world and allowed me to expand my rentals in so many areas.

Stef Easton

Founder, Hire A Horse Float

Lockii truly changed my business and the way it operates. Admin time is almost nil, customers love how easy booking is, and customer extensions cut admin even further. It was definitely our biggest year yet.

Alex Spencer

Owner, K&B Rentals

Lockii has been a game changer for my business. Ever since I switched, I've had more revenue than ever before. Customers always comment on how easy it is to rent trailers with me, and the process is streamlined and customisable.

Nathan Curtis

Founder, Hafen's SSG

Lockii is the perfect fit for my hourly rental business. It manages everything for us, so all I have to do is collect the money. Admin time per booking dropped from 30 minutes to 30 seconds and our whole workflow is now automated.

Charlie True

Founder, True Trailer Rentals

It's been very easy to use. If anything is confusing, the guys at Lockii respond quickly and make the software effortless. There are other big names out there, but you cannot beat the customer service. One booking would have more trailer rental owners switching in a hurry.

Kevin Arszylo

Owner, MI Premier Rentals

Lockii did everything I thought about while I was making my own software, with better fit and finish and a direct line to developers who actually implement advice. I can expand without fearing the paperwork, and I don't have to manually input reservations or chase IDs and contract signatures.

Dean Ironfield

Founder, MateMove

They go over and above to help, and respond to queries really quickly. Lockii gave me the flexibility to leave manual handovers behind so I can scale, spend time improving my processes, and not have to be on site.

James Matlock

Founder, Turnpike Trailer Rentals

Lockii has made running my trailer rental business incredibly easy. The automated booking and rental process lets my customers handle everything without me having to be there, which gives me the freedom to focus on growing the business instead of managing every rental.