hippo-memory-sdk 0.3.0

Python SDK (async + sync) for hippo-memory (biologically-inspired memory for AI agents). Wraps the HTTP API of the hippo-memory npm package.

hippo-memory-sdk (Python SDK)

Async Python SDK for hippo-memory, a biologically-inspired memory system for AI agents. Decay by default, strength through use, sleep consolidation.

This package is a thin async HTTP wrapper. Run hippo serve from the npm package alongside, then use this SDK to talk to it from Python.

Install

pip install hippo-memory-sdk

The Python import name is hippo_memory (the distribution name hippo-memory-sdk only matters at install time; pip install hippo-memory-sdk was chosen because PyPI's similarity check blocked the bare hippo-memory name due to an existing hippomem project).

Requires Python 3.10+. Runtime deps: httpx>=0.27, pydantic>=2.0.

Server setup

You also need the hippo-memory npm package running locally:

npm install -g hippo-memory
hippo init       # creates a .hippo directory
hippo serve      # binds 127.0.0.1:3737 by default

The Python SDK talks to this loopback server. Requires hippo-memory@>=1.11.4 server (the /v1/outcome, /v1/context, /v1/sleep routes land in v1.11.4).

Quickstart

import asyncio
from hippo_memory import Hippo

async def main():
    async with Hippo(base_url="http://127.0.0.1:3737") as client:
        # Persist a memory
        mem = await client.remember(content="bug fix lesson", tags=["error"])
        print(mem.id)

        # Search the store
        results = await client.recall(q="bug fix", limit=5)
        for r in results.results:
            print(r.id, r.score, r.content)

        # Assemble a context bundle (for prompt injection)
        ctx = await client.get_context(budget=1500)
        for item in ctx.entries:
            print(item.entry.content)

        # After your agent uses recalled memories, mark them good/bad
        await client.outcome(good=True)  # uses last-recall path

asyncio.run(main())

See examples/ for 3 runnable scripts: basic remember+recall, context injection, outcome feedback.

Authentication

Default is unauthenticated localhost (tenant default). For multi-tenant deployments, mint an API key via the CLI:

hippo auth create-key --label my-key
# Outputs a plaintext sk_... key (saved ONCE — store it)

Then pass it to the client:

async with Hippo(api_key="sk_...") as client:
    # All operations now scoped to the key's tenant
    ...

API surface

Method	HTTP	Notes
health()	GET /health	server version + pid
remember(content, ...)	POST /v1/memories	returns slim envelope (id + kind + tenant_id)
recall(q, ...)	GET /v1/memories	search; scored results + token usage
drill(id, ...)	GET /v1/recall/drill/:id	drill into a memory's children (DAG)
forget(id)	DELETE /v1/memories/:id	hard-delete
archive(id, reason?)	POST /v1/memories/:id/archive	soft-archive (append-only raw memories)
supersede(id, by)	POST /v1/memories/:id/supersede	mark superseded
promote(id)	POST /v1/memories/:id/promote	local -> global
outcome(good, ids?)	POST /v1/outcome	apply outcome; last-recall path if no ids
get_context(...)	GET /v1/context	assemble context bundle for prompt injection
sleep(dry_run?, no_share?)	POST /v1/sleep	consolidation (loopback-only)
assemble(session_id)	GET /v1/sessions/:id/assemble	Phase 2 context-engine assembly
auth_create(label?)	POST /v1/auth/keys	mint a key (plaintext returned ONCE)
auth_list(active?)	GET /v1/auth/keys	list keys for caller's tenant
auth_revoke(key_id)	DELETE /v1/auth/keys/:keyId	revoke a key
audit(op?, since?, limit?)	GET /v1/audit	read audit events

Every method returns a Pydantic v2 model. Failed HTTP responses raise HippoError with status_code and parsed body.

What's new in v0.2.0

• Sync client (HippoSync). A line-for-line mirror of Hippo using httpx.Client. Use when your code already runs synchronously (CLI scripts, notebooks, threading.Thread callbacks) and you don't want to manage an event loop. Wire-compatible: same routes, same models, same errors.
• ContextEntry.projected() helper. Projects the full MemoryEntry surface to the CLI's narrower json shape (id, score, strength, tags, confidence, content, global). Use when piping SDK results into LLM context or CLI-shaped downstream consumers.
• auth_create(role=) parameter. Matches hippo-memory v1.12.3 server: pass role="admin" or role="member". Member keys are 403-blocked from admin-gated routes (e.g. /v1/sleep). Both AuthCreated.role and AuthKey.role populated by v1.12.3+ servers.

Limitations (v0.2)

• /v1/sleep is loopback-only + admin-gated on the server side. The route refuses non-loopback connections (v1.11.4) and member-role Bearer tokens (v1.12.0 sub-1). This SDK is intended for use against a co-located hippo serve with an admin key.
• /v1/sleep operates host-wide (cross-tenant). Matches the CLI's hippo sleep semantic. Per-tenant scoping deferred until non-loopback serving lands.
• recall does NOT populate last_retrieval_ids — by design (locked in hippo-memory v1.11.5). To prime the last-recall outcome path, call get_context first. The CLI's hippo recall populates it because the CLI is interactive (user is about to run hippo outcome --good); the SDK is programmatic and SDK callers batch recall calls, where overwriting last_retrieval_ids each call would break the outcome workflow. Source: api.ts:412-421 JSDoc + tests/api-recall-no-side-effects.test.ts.
• Server connector webhook routes (/v1/connectors/{slack,github}/events) are not wrapped in the SDK — they are server-side facing, not client-shaped.

Versioning

PyPI: hippo-memory-sdk v0.2.0. npm: hippo-memory@>=1.12.4 (the server). The two version lines move independently; the SDK reads the server's /health version to confirm compatibility.

Source

Lives in python/ of the kitfunso/hippo-memory monorepo. CHANGELOG entry: Python SDK v0.1.0 (2026-05-23) at the top of the root CHANGELOG.md.

License

MIT.