4 listings in Livermore, 2 of them farmers markets. 1 has a market day and hours from a public register or the market's own website, and 1 appears in the USDA SNAP retailer register. Market days in Livermore: Monday (1), Tuesday (1), Wednesday (1), Thursday (1), Friday (1).
Few Livermore listings have a schedule or SNAP authorization we could source. Brentwood, 17 miles away, has 17 listings with more sourced detail; see also all of California.
Livermore Downtown Thursday Farmers Market is authorized SNAP retailer in the USDA register. Ask at the information table how EBT tokens work at that market.