Devices, systems, and methods for channel access in dynamic spectrum sharing. In one embodiment, a server includes a communication interface, a memory, and an electronic processor configured to receive an allotment of bidding credits, determine an amount of available spectrum, generate a power spectrum matrix, generate a bid based on a need for spectrum access and a portion of the allotment of bidding credits, control the communication interface to transmit the power spectrum matrix and the bid to the one or more servers, receive an external power spectrum matrix and an associated bid from each of the one or more servers, compare the bid to the associated bid to determine a winning bid, and control all of the one or more radio nodes to use the spectrum that is associated with the power spectrum matrix in response to determining that the bid is the winning bid.