emem — Earth memory protocol

Every location on Earth gets a 64-bit cell identifier and a cryptographically signed answer for elevation, land cover, climate, or one of 46 remote sensing bands. Ask for a fact at a cell and emem fetches the tile, signs it with ed25519, persists it, and returns a content-addressed receipt you can verify at /verify without trusting the server. The MCP interface exposes locate, recall_bands, memory_create, memory_search, and memory_contradictions. Cold reads take 180ms, warm reads under 10ms, no API keys required. Four foundation models (Clay, Prithvi, Tessera, Galileo) run server-side for consensus scoring on deforestation, wetland change, and disaster anomaly. Reach for this when your agent needs a stable, auditable handle for real-world coordinates instead of hallucinating numbers.