SAIHM Server

One client-side-encrypted memory. Every model. Erasure you can prove.

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This is a tiny, runnable demo of SAIHM — non-custodial, post-quantum memory for AI agents. It stores three personal facts, grounds two models at once (Claude and DeepSeek by default — or Qwen, Kimi, GLM, GPT; your pick) in the same memory, then forgets one fact and shows that neither model can use it any more.

It runs fully offline with zero signup against a local blind endpoint (included, ~130 lines), or against the real hosted SAIHM service with one environment variable.

git clone https://github.com/citw2/demo-cross-model-memory
cd demo-cross-model-memory
npm install
node demo.mjs

What you'll see

------------------------------------------------------------------------
SAIHM cross-model memory demo
------------------------------------------------------------------------
agent id : e4203f25c7dd3a9b...
endpoint : http://127.0.0.1:<port>/mcp  (local sandbox)
custody  : non-custodial  (the endpoint stores ciphertext only; it holds no key)
models   : Claude + DeepSeek  (set MODEL_A / MODEL_B to: claude, deepseek, qwen, kimi, glm, openai)

Sealed and stored 3 facts (the endpoint now holds 3 opaque shards).

------------------------------------------------------------------------
(1) One memory, every model -- Claude and DeepSeek, both grounded in SAIHM:
------------------------------------------------------------------------
[Claude - offline mock]
What I know about you:
  - My name is Dana Okafor.
  - I am allergic to penicillin.
  - I am building a Rust ray tracer called Lumen.
Medically: per "I am allergic to penicillin.", avoid the substance it names.

[DeepSeek - offline mock]
What I know about you:
  - My name is Dana Okafor.
  - I am allergic to penicillin.
  - I am building a Rust ray tracer called Lumen.
Medically: per "I am allergic to penicillin.", avoid the substance it names.

------------------------------------------------------------------------
(2) Provable erasure -- forget the allergy, then ask the same question again:
------------------------------------------------------------------------
forget("I am allergic to penicillin.")  ->  recall now returns: NOTHING (crypto-shredded)

[Claude - offline mock]
What I know about you:
  - My name is Dana Okafor.
  - I am building a Rust ray tracer called Lumen.
Medically: nothing is remembered on that, so I won't guess.

[DeepSeek - offline mock]
What I know about you:
  - My name is Dana Okafor.
  - I am building a Rust ray tracer called Lumen.
Medically: nothing is remembered on that, so I won't guess.

Two things just happened that a per-vendor "memory" feature doesn't give you:

1. Portability across models. Your memory lives with you, not inside one model's account — one live store that grounds Claude and DeepSeek at once, with no per-vendor export or lossy one-time import. The same store would ground GPT, Qwen, Kimi, GLM, a local model, or your own agent, unchanged.
2. Provable erasure. forget crypto-shreds the cell (its wrapped key is destroyed). recall returns nothing for it, and every model loses access at once — not a soft "hidden" flag. This is what GDPR Art. 17 ("right to erasure") actually asks for.

Choose your models (any two, side by side)

The demo runs two models next to each other to show the same memory grounding both. Pick them with MODEL_A / MODEL_B (default: claude + deepseek):

MODEL_A=qwen MODEL_B=kimi node demo.mjs

MODEL_* value	Model	API key env (BYOK)
claude	Claude (Anthropic)	ANTHROPIC_API_KEY
deepseek	DeepSeek	DEEPSEEK_API_KEY
qwen	Qwen (Alibaba)	DASHSCOPE_API_KEY
kimi	Kimi (Moonshot)	MOONSHOT_API_KEY
glm	GLM (Zhipu)	ZHIPUAI_API_KEY
openai	GPT (OpenAI)	OPENAI_API_KEY

With no key set, a model answers in a deterministic offline mock, so the demo runs end to end with zero setup. Set a key to get real answers; keys are read from your environment and sent only to that model's own API. The DeepSeek / Qwen / Kimi / GLM / GPT calls are the same OpenAI-compatible request — SAIHM reaches every model through one path. (Override a provider's base URL or model id without touching code via SAIHM_<MODEL>_URL / SAIHM_<MODEL>_MODEL.)

That every one of these models can be grounded in — and erased from — a single store is the whole point: your memory is yours, not locked inside one vendor.

Go live against the real SAIHM service

The local sandbox is a throwaway stand-in so you can try the protocol offline — it is not the SAIHM service and stores nothing beyond the current process. To run the exact same demo against the real, hosted, blind endpoint:

1. Start free — no card. Run npx -y @saihm/mcp-server-pro free-join once to activate a free tier (a one-time, lifetime allowance) on an identity you hold. For production, Join SAIHM for a paid Pro membership and onboard to obtain a JWT.

2. Point the demo at the live endpoint:

   export SAIHM_ENDPOINT_URL=https://saihm.coti.global/mcp
   export SAIHM_MASTER_SECRET_HEX=<at least 64 hex chars, generated and held only by you>
   export SAIHM_TIER=FREE                      # free tier (after the free-join above)
   # …or a paid Pro membership instead:
   # export SAIHM_AUTH_HEADER="Bearer <your-onboard-JWT>"
   node demo.mjs
   

Your master secret never leaves your machine; the endpoint only ever receives ciphertext.

How it works

• @saihm/mcp-server-pro (the client) seals every cell with @saihm/client-pro: an ML-DSA-65 identity signs it, a per-cell AES-256-GCM key encrypts it, and that key is wrapped under a key-encryption key derived from your master secret. Sharing uses ML-KEM-768. All of this happens in your process.
• Only opaque ciphertext is POSTed to the endpoint. sandbox.mjs is a complete, readable blind operator: it stores and returns ciphertext and never holds a key — exactly the property the hosted service provides at scale (with on-chain anchoring, authenticated sharing, and metering).
• forget tells the endpoint to destroy the wrapped key. Without it the ciphertext is unrecoverable noise — that is the "crypto-shred".

Built on / see also

• @saihm/mcp-server-pro — the production sealing client this demo uses (npm).
• @saihm/client-pro — the post-quantum client crypto library (npm).
• @saihm/mcp-server — the open MCP thin-client for the SAIHM transport (npm).
• Learn more: AI memory needs a standard · What makes SAIHM different.
• Join the protocol: saihm.coti.global/join.

License

Apache-2.0 © SAIHM