{"type":"firestarter.listing","listing":{"id":"lst_kxrCaE8N","product_name":"Marvel Multiverse Role-Playing Game: X-Men Expansion","category":"Book","description":"Marvel Multiverse Role-Playing Game: X-Men Expansion\nThe Marvel Multiverse Role-Playing Game's first full-sized sourcebook is here, focusing on the Uncanny X-Men!\n\"To me, my X-Men!\" This -- the first full-sized sourcebook for the Marvel Multiverse Role-Playing Game -- features the strangest super heroes of all: the X-Men and all their various spin-off teams, greatest allies and most fearsome foes. Written by d616 System co-creator and New York Times-bestseller Matt Forbeck ( The Marvel Encyclopedia, Dungeons &amp; Dragons: Endless Quest) and packed with illustrations by Marvel's incredible army of artists, the X-Men Sourcebook is jammed full of vital information about Marvel's most popular mutants, including dozens of new profiles for characters from X-Force, New Mutants and Marauders. It also includes full-color maps of famous X-Men homes, including the Xavier Institute, Krakoa and Arakko, plus plenty of plot hooks for an entire campaign. Answer the call and join the X-Men!\nPages: 256","images":["https://cdn.shopify.com/s/files/1/0773/5712/1838/files/image_c7fe782e-7c6f-402b-b4fd-e9622f33e0cd.jpg?v=1746720148"],"price":49.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:09.411Z"},"share_url":"https://firestarter.network/l/lst_kxrCaE8N","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_kxrCaE8N' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Marvel Multiverse Role-Playing Game: X-Men Expansion' and a budget_max comfortably above $49.99 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}