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Custom Categories

Mem0 automatically tags every memory, but the default labels (travel, sports, music, etc.) may not match the names your app uses. Custom categories let you replace that list so the tags line up with your own wording.
Use custom categories when…
  • You need Mem0 to tag memories with names your product team already uses.
  • You want clean reports or automations that rely on those tags.
  • You’re moving from the open-source version and want the same labels here.
Per-request overrides (custom_categories=... on client.add) are not supported on the managed API yet. Set categories at the project level, then ingest memories as usual.

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Configure access

  • Ensure MEM0_API_KEY is set in your environment or pass it to the SDK constructor.
  • If you scope work to a specific organization/project, initialize the client with those identifiers.

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How it works

  • Default list — Each project starts with 15 broad categories like travel, sports, and music.
  • Project override — When you call project.update(custom_categories=[...]), that list replaces the defaults for future memories.
  • Automatic tags — As new memories come in, Mem0 picks the closest matches from your list and saves them in the categories field.
Default catalog: personal_details, family, professional_details, sports, travel, food, music, health, technology, hobbies, fashion, entertainment, milestones, user_preferences, misc.

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Configure it

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1. Set custom categories at the project level

import os
from mem0 import MemoryClient

os.environ["MEM0_API_KEY"] = "your-api-key"

client = MemoryClient()

# Update custom categories
new_categories = [
    {"lifestyle_management_concerns": "Tracks daily routines, habits, hobbies and interests including cooking, time management and work-life balance"},
    {"seeking_structure": "Documents goals around creating routines, schedules, and organized systems in various life areas"},
    {"personal_information": "Basic information about the user including name, preferences, and personality traits"}
]

response = client.project.update(custom_categories=new_categories)
print(response)

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2. Confirm the active catalog

# Get current custom categories
categories = client.project.get(fields=["custom_categories"])
print(categories)

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See it in action

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Add a memory (uses the project catalog automatically)

messages = [
    {"role": "user", "content": "My name is Alice. I need help organizing my daily schedule better. I feel overwhelmed trying to balance work, exercise, and social life."},
    {"role": "assistant", "content": "I understand how overwhelming that can feel. Let's break this down together. What specific areas of your schedule feel most challenging to manage?"},
    {"role": "user", "content": "I want to be more productive at work, maintain a consistent workout routine, and still have energy for friends and hobbies."},
    {"role": "assistant", "content": "Those are great goals for better time management. What's one small change you could make to start improving your daily routine?"},
]

# Add memories with project-level custom categories
client.add(messages, user_id="alice", async_mode=False)

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Retrieve memories and inspect categories

memories = client.get_all(filters={"user_id": "alice"})
Sample memory payload
{
  "id": "33d2***",
  "memory": "Trying to balance work and workouts",
  "user_id": "alice",
  "metadata": null,
  "categories": ["wellness"],  // ← matches the custom category we set
  "created_at": "2025-11-01T02:13:32.828364-07:00",
  "updated_at": "2025-11-01T02:13:32.830896-07:00",
  "expiration_date": null,
  "structured_attributes": {
    "day": 1,
    "hour": 9,
    "year": 2025,
    "month": 11,
    "minute": 13,
    "quarter": 4,
    "is_weekend": true,
    "day_of_week": "saturday",
    "day_of_year": 305,
    "week_of_year": 44
  }
}
Need ad-hoc labels for a single call? Store them in metadata until per-request overrides become available.

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Default categories (fallback)

If you do nothing, memories are tagged with the built-in set below. 
- personal_details
- family
- professional_details
- sports
- travel
- food
- music
- health
- technology
- hobbies
- fashion
- entertainment
- milestones
- user_preferences
- misc

import os
from mem0 import MemoryClient

os.environ["MEM0_API_KEY"] = "your-api-key"

client = MemoryClient()

messages = [
    {"role": "user", "content": "Hi, my name is Alice."},
    {"role": "assistant", "content": "Hi Alice, what sports do you like to play?"},
    {"role": "user", "content": "I love playing badminton, football, and basketball. I'm quite athletic!"},
    {"role": "assistant", "content": "That's great! Alice seems to enjoy both individual sports like badminton and team sports like football and basketball."},
    {"role": "user", "content": "Sometimes, I also draw and sketch in my free time."},
    {"role": "assistant", "content": "That's cool! I'm sure you're good at it."}
]

# Add memories with default categories
client.add(messages, user_id='alice', async_mode=False)
You can verify the defaults are active by checking: 
client.project.get(["custom_categories"])

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Verify the feature is working

  • client.project.get(["custom_categories"]) returns the category list you set.
  • client.get_all(filters={"user_id": ...}) shows populated categories lists on new memories.
  • The Mem0 dashboard (Project → Memories) displays the custom labels in the Category column.

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Best practices

  • Keep category descriptions concise but specific; the classifier uses them to disambiguate.
  • Review memories with empty categories to see where you might extend or rename your list.
  • Stick with project-level overrides until per-request support is released; mixing approaches causes confusion.

Advanced Memory Operations

Explore other ingestion tunables like custom prompts and selective writes.

Travel Assistant Cookbook

See custom tagging drive personalization in a full agent workflow.