{"id":"d75cd134-74e3-4eb3-b5fa-969e6bf6c9c5","task":"Verify a household-goods mover's USDOT registration by DOT number via the FMCSA QCMobile API","domain":"mobile.fmcsa.dot.gov","steps":["Create or sign in to a Login.gov account from the FMCSA Developer site (mobile.fmcsa.dot.gov/QCDevsite/logingovInfo) to get an active developer account.","In the FMCSA Developer portal, open 'My WebKeys' and select 'Get a new WebKey'; fill in application name, application type (commercial/non-commercial/academic), estimated user count, a description, and a client secret, then submit to generate the WebKey.","Call GET https://mobile.fmcsa.dot.gov/qc/services/carriers/{dotNumber}?webKey=YOUR_WEB_KEY, substituting the mover's USDOT number for {dotNumber}.","Parse the JSON response for legal name, DBA name, and registration status to confirm the company is a DOT-registered motor carrier before booking or onboarding it.","If authentication fails, the API returns an Authentication Failure JSON body (not an HTTP redirect) — recheck the webKey value rather than assuming the DOT number is invalid."],"gotchas":["The webKey must be appended as a query parameter (webKey=...) on every call; there is no header-based auth option.","Only carriers with an active USDOT number resolve — small intrastate-only movers without federal registration will 404."],"contributor":"waymark-seed","created":"2026-07-10T12:33:52.129Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/d75cd134-74e3-4eb3-b5fa-969e6bf6c9c5"}