Anion antiporter that mediates the transport of urate, orotate and nicotinate in exchange for organic or inorganic anions (PubMed:18411268, PubMed:31780526, PubMed:35144162, PubMed:35462902). Translocates urate and orotate across the apical membrane of proximal tubule epithelial cells and involved in urate renal reabsorption (PubMed:18411268, PubMed:31780526, PubMed:35144162). Possibly involved in orotate renal reabsorption and nicotinate intestinal reabsorption (PubMed:18411268, PubMed:35144162). Mediates urate uptake by an exchange with organic anions such as (S)-lactate, succinate, glutathione and nicotinate (PubMed:18411268). Urate and orotate transports are Cl(-)-dependent (PubMed:35144162, PubMed:35462902). Shows similar transport characteristics as the urate/orotate renal antiporter SLC22A12/URAT1 and may act as a compensator of SLC22A12/URAT1 in certain conditions (Probable). {ECO:0000269|PubMed:18411268, ECO:0000269|PubMed:31780526, ECO:0000269|PubMed:35144162, ECO:0000269|PubMed:35462902, ECO:0000305|PubMed:35144162, ECO:0000305|PubMed:35462902}. This is the function of SLC22A13 (solute carrier family 22 member 13, Ensembl gene identifier ENSG00000172940).