AI Index
Proposals & vendor “standards”
Not ratified by any standards body. Indexed by URL, not by name, because at least three unrelated things are called “Open Memory.” 10 entries.
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SpecificationACP (Agent Connect Protocol)AGNTCY sub-spec: OpenAPI REST schema for agent connection (Apache-2.0)SpecificationAMP (Agent Memory Protocol)Open memory protocol: markdown-first file store, Memory Exchange Format (MXF), conformance levels; pip amp-server. NOTE: name collides wi…SpecificationARD (Agentic Resource Discovery)AGNTCY sub-spec: signed 'AI Cards' for agent discovery; MCP/A2A card types; SPIFFE identity; federated AGNTCY DirectorySpecificationEngramSpecengramspec.org — CC BY 4.0 v0.1; single GET /v1/context endpoint; governed by the 'Engram Steering Group' chaired by 8mem, the vendor. Ve…SpecificationLetta Agent File (.af)Vendor-authored 'open standard' file format serializing one stateful agent (prompts, memory blocks, history). Format convention, not a st…
★ 1,216 on GitHub
SpecificationMem0 OpenMemory (SUNSET)TRAP NAME: announced sunset Apr 2026; removed from the mem0 monorepo 2026-07-29; mem0-mcp archived Mar 2026; the mem0.ai/openmemory marke…Specificationno commits in 130 daysOpen Memory Protocol (OMP)SMJAI v2.0 draft, CC BY 4.0, 'iCloud of AI' conversation backup + hosted Memory Vault. UNRELATED to Mem0's OpenMemory — index by URL, not…★ 87 on GitHub
Specificationno commits in 263 daysPortable AI Memory (PAM)JSON Schema 2020-12, 11 memory types, Ed25519/ECDSA sigs, W3C DID. Solo project — 12 stars, 2 commits at launch.★ 12 on GitHub
SpecificationPortable Memory (MacPaw).mem bundle; MIT; ICML AIWILD 2026 preprint; 'standards proposal for community review' by a vendor research group.★ 7 on GitHub
SpecificationUMP (Universal Memory Protocol)Transport-neutral memory interchange: content-addressed signed bi-temporal records bound to DIDs; verify-filter-frame rehydration; consen…