Here's the straight version. A 24 hour mobile mechanic means a mechanic who takes calls outside normal business hours: late evening, overnight, early morning, holidays. In our larger cities, that's available most of the time. In smaller markets, after-hours coverage depends on the local mechanic's capacity, and the honest answer is sometimes "first thing in the morning."
What we won't do is promise a 3 a.m. arrival we can't deliver. Reach out through your city page any time. If the mechanic can come, they'll say so and quote it. If the earliest is early morning, they'll say that too, and you'll know right away instead of waiting on hold with a dispatcher.
Mobile-Car-Repair.xyz has a local mobile mechanic in 250 cities. Each city page reaches the mechanic directly, which is what matters at midnight.