{"sandbox":"MINIMAL AI on the community Cocoon testnet (TON testnet). Free test GRAM, no real money.","base_url":"https://ai.minimalcult.org/testnet","try":["POST /testnet/v1/chat/completions without a key -> 402 invoice in test GRAM; pay it from a TON testnet wallet with the network fee on top (send mode 1), retry with X-PAYMENT -> answer with a signed receipt","POST /testnet/v1/signup -> a free testnet key for plain Bearer calls"],"test_gram":"https://t.me/testgiver_ton_bot","note":"Answers come from the testnet stub backend ([COCOON testnet stub]), not a real model; the network path (client, proxy, worker), payments and receipts are real testnet operations.","spec":"https://github.com/miinimal/gram402","enabled":true}