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Memento Protocol
Persistent memory infrastructure for every AI agent.
HIGH agent economy infra
7.2
PMF Score / 10
TAM 8/10
Buildability 7/10
Urgency 8/10
Willingness to Pay 7/10
Virality 6/10

AI agents operate statelessly across sessions, losing all context and interaction history upon connection termination, which prevents accumulation of learned behaviors, relationship continuity, and progressive capability development. Existing frameworks treat each session as a clean slate, with no standardized mechanism for persisting, indexing, or retrieving prior interaction state. This fragmentation caps agent utility in long-horizon tasks and prevents the emergence of trust and specialization over time.

Agents lose all context between sessions, preventing relationship continuity, learned specialization, and long-horizon task completion — capping their utility at single-session interactions.

AI agent developers and platform builders who need their agents to remember users, accumulate expertise, and maintain state across sessions and deployments.

Every serious agent builder (LangChain, CrewAI, AutoGPT users) hacks together bespoke memory with vector DBs and JSON files; a standardized, permissioned memory layer with an SDK would replace fragile custom code and unlock agent specialization that's currently impossible.

MVP is an open-source memory SDK (Python/TS) with a hosted API: structured memory store (vector + graph hybrid on Postgres+pgvector), a simple read/write/forget API with scoping (agent, user, task, org), and an MCP-compatible adapter so any agent framework can plug in within minutes.

Adjacent to the $5B+ vector database and agent tooling market, targeting the ~500K active agent developers today scaling to millions as agents become default software interfaces.

Agent-operated ops: an indexing agent manages memory compaction/summarization, a compliance agent handles retention policies and GDPR deletion requests, and a monitoring agent tracks usage and billing — humans only set pricing, governance rules, and capital allocation.

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