api.loyalspark.online/x402-gateway/recipient-api/cancel-offer

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. On the paid retry send the payment together with header x-api-key: rwk_... or Authorization: Bearer rwk_.... A payment without a live key is not charged. Holder key, not a merchant key. There is no paid registration. POST https://api.loyalspark.online/siwe-nonce, sign a SIWE message (Chain ID 8453) with the holder wallet and no special phrase, then POST {message, signature, name} to https://api.loyalspark.online/recipient-api/register. The rwk_ key sees only that wallet: balances, redeem, vouchers, transfer calldata, P2P, gift claims. Guide: https://loyalspark.online/.well-known/skills/00-getting-started.md The call is scoped to the wallet behind that key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.