I walked Le Puy to Santiago in 2018 Spring. I used Gronze.com and Miam Miam Dodo. Miam Miam Dodo was very helpful. When I looked for the lodging, I looked for the Gite (they called albergue in France) Miam Miam Dodo indicated the Gite with British flag that mean someone able to speak English there, and the which gite can provide meals, etc. When I walked in the country site, there's not many restaurant/cafe were available; especially on May 1st, most of restaurants were closed, so I had a hard time on that day.
I purchased my credential at the gift shop in the Cathedral in Le Puy. If you arrive in Le Puy late, you can buy that on your way out after the pilgrim Mass at 6:00 AM. The gift shop open after the Mass at the Cathedral.