Update Memory

Modify an existing memory by updating its content or metadata.

Keep Memories Accurate with Update

Mem0’s update operation lets you fix or enrich an existing memory without deleting it. When a user changes their preference or clarifies a fact, use update to keep the knowledge base fresh.

Why it matters

• Corrects outdated or incorrect memories immediately.
• Adds new metadata so filters and rerankers stay sharp.
• Works for both one-off edits and large batches (up to 1000 memories).

Key terms

• memory_id – Unique identifier returned by add or search results.
• text / data – New content that replaces the stored memory value.
• metadata – Optional key-value pairs you update alongside the text.
• batch_update – Platform API that edits multiple memories in a single request.
• immutable – Flagged memories that must be deleted and re-added instead of updated.

How the update flow works

1. Locate the memory

   Use search or dashboard inspection to capture the memory_id you want to change.

2. Submit the update

   Call update (or batch_update) with new text and optional metadata. Mem0 overwrites the stored value and adjusts indexes.

3. Verify

   Check the response or re-run search to ensure the revised memory appears with the new content.

Single memory update (Platform)

Python

from mem0 import MemoryClient

client = MemoryClient(api_key="your-api-key")

memory_id = "your_memory_id"
client.update(
    memory_id=memory_id,
    text="Updated memory content about the user",
    metadata={"category": "profile-update"}
)

Expect a confirmation message and the updated memory to appear in the dashboard almost instantly.

Batch update (Platform)

Update up to 1000 memories in one call.

Python

from mem0 import MemoryClient

client = MemoryClient(api_key="your-api-key")

update_memories = [
    {"memory_id": "id1", "text": "Watches football"},
    {"memory_id": "id2", "text": "Likes to travel"}
]

response = client.batch_update(update_memories)
print(response)

Update with Mem0 OSS

Python

from mem0 import Memory

memory = Memory()

memory.update(
    memory_id="mem_123",
    data="Alex now prefers decaf coffee",
)

OSS JavaScript SDK does not expose update yet—use the REST API or Python SDK when self-hosting.

Tips

• Update both text and metadata together to keep filters accurate.
• Batch updates are ideal after large imports or when syncing CRM corrections.
• Immutable memories must be deleted and re-added instead of updated.
• Pair updates with feedback signals (thumbs up/down) to self-heal memories automatically.

Managed vs OSS differences

Capability	Mem0 Platform	Mem0 OSS
Update call	client.update(memory_id, {...})	memory.update(memory_id, data=...)
Batch updates	client.batch_update (up to 1000 memories)	Script your own loop or bulk job
Dashboard visibility	Inspect updates in the UI	Inspect via logs or custom tooling
Immutable handling	Returns descriptive error	Raises exception—delete and re-add

Put it into practice

• Review the Update Memory API reference for request/response details.
• Combine updates with Feedback Mechanism to automate corrections.

See it live

• Support Inbox with Mem0 uses updates to refine customer profiles.
• AI Tutor with Mem0 demonstrates user preference corrections mid-course.

Learn Delete Concepts

Automate Corrections