Texas does not license general contractors. There is no state licence to look up, no number to ask for, and no register that will confirm one — a contractor claiming a “Texas contractor license number” for general construction is describing something the state does not issue. Some cities register contractors locally, and those registrations are municipal and not published as open data.
Try a free lookup — no signup, right here on this page. For programmatic access, take a free API key — 250 requests a month, no card. Also on RapidAPI and, if you would rather not write code at all, the Apify Store.
What is verifiable: if the job involves electrical or HVAC work, the specialist doing it must hold a TDLR licence, and that one is real and checkable here. Ask for the trade licence of whoever does the regulated work rather than for a general licence that does not exist.
Full coverage detail, including the caveats that apply to every Texas lookup, is on the Texas page.
The API is on RapidAPI with a free tier: Contractor License Verification. It is also on the Apify Store: Contractor License Lookup & Verification. Full schema at /docs.