Launched in 2020, the app has previously been used to allow people crossing legally at land ports of entry to submit their information beforehand and for non-governmental organizations to request humanitarian entry for certain migrants. U.S. President Joe Biden's administration touts the app as a more regulated, potentially quicker alternative to crossing the border. Rodriguez has been camping in Matamoros, a Mexican border city across from Brownsville, since late November with over a dozen family members, some of whom have already crossed into the United States. Claudia Martinez, a 38-year-old Venezuelan waiting in Tijuana, was unable to access CBP One despite several tries. Reporting by Ted Hesson in Washington and Daina Solomon in Mexico City; Additional reporting by Jackie Botts in Oaxaca City, Lizbeth Diaz in Mexico City and Kristina Cooke in San Francisco; Editing by Aurora EllisOur Standards: The Thomson Reuters Trust Principles.

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