{"version":"1.0","type":"card","id":"e68bc502-6a3f-4816-aacb-88a8b5067b38","url":"https://stacklist.com/card/e68bc502-6a3f-4816-aacb-88a8b5067b38","title":"We benchmarked an 84% token reduction. Then we open sourced the protocol.","source_url":null,"note":"Building ACP, and sitting with the part we can't solve.","image":null,"stack":{"id":"03b65ace-2355-4673-8669-fc2684f9d2a1","title":"Martina Zrnec: Founder &amp; Builder Essays","url":"https://stacklist.com/c/business/stack/03b65ace-2355-4673-8669-fc2684f9d2a1"},"created_at":"2026-10-12T10:43:31.615Z","updated_at":null,"aco":{"summary":"Atomic Content Protocol (ACP) is an open-source protocol that reduces token consumption for AI agents by 84-99% by serving structured content envelopes before full page bodies. The protocol breaks content into discrete atoms with metadata, eliminating the inefficiency of agents parsing web pages designed for human consumption.","tags":["token-reduction","atomic-content-protocol","web-agents","protocol-design","open-source","stacklist","mcp"],"key_entities":[{"name":"Atomic Content Protocol","type":"technology","confidence":0.99},{"name":"ACP","type":"technology","confidence":0.99},{"name":"MCP","type":"technology","confidence":0.95},{"name":"Stacklist","type":"organization","confidence":0.95},{"name":"Stacky","type":"technology","confidence":0.9},{"name":"token reduction","type":"concept","confidence":0.95},{"name":"content envelope","type":"concept","confidence":0.9},{"name":"Wikipedia","type":"location","confidence":0.85}],"classification":"analysis","language":"en","confidence":0.85,"provenance":{"model":"claude-haiku-4-5","tool":"@stacklist/be@0.1.0","confidence":0.85,"timestamp":"2026-10-12T10:43:35.287Z"},"token_counts":{"approximate":1519,"cl100k":1425},"content_hash":"sha256:dc57ab5f6293cc9dc9c21e155ec04cf3a5ca6064fb0c2581a559a4e921b60419","acp_version":"0.2","body_available":true,"body_tokens":1519,"visibility":"public","agent_accessible":true,"status":"final"},"_links":{"self":"/api/public/card/e68bc502-6a3f-4816-aacb-88a8b5067b38.json","html":"https://stacklist.com/card/e68bc502-6a3f-4816-aacb-88a8b5067b38","md":"/api/public/card/e68bc502-6a3f-4816-aacb-88a8b5067b38.md","stack_json":"/api/public/stack/03b65ace-2355-4673-8669-fc2684f9d2a1.json"}}