SHANNON builds APIs for developers. Webhook Admin sends your webhooks with signing, retries and static IPs. SealGate adds passkeys to an existing login. avacast gives your app a realtime talking avatar.
SHANNON is a software company in Japan. We build and run business systems for our clients, and we turn the parts every product needs into APIs that any developer can use. Each API has a free tier, docs in English and Japanese, and an MCP server so AI agents can set it up.
