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Virtual Keys

Track Spend, and control model access via virtual keys for the proxy

info

Setup​

Requirements:

  • Need a postgres database (e.g. Supabase, Neon, etc)
  • Set DATABASE_URL=postgresql://<user>:<password>@<host>:<port>/<dbname> in your env
  • Set a master key, this is your Proxy Admin key - you can use this to create other keys (🚨 must start with sk-).
    • ** Set on config.yaml** set your master key under general_settings:master_key, example below
    • ** Set env variable** set LITELLM_MASTER_KEY

(the proxy Dockerfile checks if the DATABASE_URL is set and then initializes the DB connection)

export DATABASE_URL=postgresql://<user>:<password>@<host>:<port>/<dbname>

You can then generate keys by hitting the /key/generate endpoint.

See code

Quick Start - Generate a Key​

Step 1: Save postgres db url

model_list:
  - model_name: gpt-4
    litellm_params:
        model: ollama/llama2
  - model_name: gpt-3.5-turbo
    litellm_params:
        model: ollama/llama2

general_settings: 
  master_key: sk-1234 
  database_url: "postgresql://<user>:<password>@<host>:<port>/<dbname>" # 👈 KEY CHANGE

Step 2: Start litellm

litellm --config /path/to/config.yaml

Step 3: Generate keys

curl 'http://0.0.0.0:4000/key/generate' \
--header 'Authorization: Bearer <your-master-key>' \
--header 'Content-Type: application/json' \
--data-raw '{"models": ["gpt-3.5-turbo", "gpt-4"], "metadata": {"user": "ishaan@berri.ai"}}'

Spend Tracking​

Get spend per:

How is it calculated?

The cost per model is stored here and calculated by the completion_cost function.

How is it tracking?

Spend is automatically tracked for the key in the "LiteLLM_VerificationTokenTable". If the key has an attached 'user_id' or 'team_id', the spend for that user is tracked in the "LiteLLM_UserTable", and team in the "LiteLLM_TeamTable".

You can get spend for a key by using the /key/info endpoint.

curl 'http://0.0.0.0:4000/key/info?key=<user-key>' \
     -X GET \
     -H 'Authorization: Bearer <your-master-key>'

This is automatically updated (in USD) when calls are made to /completions, /chat/completions, /embeddings using litellm's completion_cost() function. See Code.

Sample response

{
    "key": "sk-tXL0wt5-lOOVK9sfY2UacA",
    "info": {
        "token": "sk-tXL0wt5-lOOVK9sfY2UacA",
        "spend": 0.0001065, # 👈 SPEND
        "expires": "2023-11-24T23:19:11.131000Z",
        "models": [
            "gpt-3.5-turbo",
            "gpt-4",
            "claude-2"
        ],
        "aliases": {
            "mistral-7b": "gpt-3.5-turbo"
        },
        "config": {}
    }
}

Model Aliases​

If a user is expected to use a given model (i.e. gpt3-5), and you want to:

  • try to upgrade the request (i.e. GPT4)
  • or downgrade it (i.e. Mistral)

Here's how you can do that:

Step 1: Create a model group in config.yaml (save model name, api keys, etc.)

model_list:
  - model_name: my-free-tier
    litellm_params:
        model: huggingface/HuggingFaceH4/zephyr-7b-beta
        api_base: http://0.0.0.0:8001
  - model_name: my-free-tier
    litellm_params:
        model: huggingface/HuggingFaceH4/zephyr-7b-beta
        api_base: http://0.0.0.0:8002
  - model_name: my-free-tier
    litellm_params:
        model: huggingface/HuggingFaceH4/zephyr-7b-beta
        api_base: http://0.0.0.0:8003
  - model_name: my-paid-tier
    litellm_params:
        model: gpt-4
        api_key: my-api-key

Step 2: Generate a key

curl -X POST "https://0.0.0.0:4000/key/generate" \
-H "Authorization: Bearer <your-master-key>" \
-H "Content-Type: application/json" \
-d '{
	"models": ["my-free-tier"], 
	"aliases": {"gpt-3.5-turbo": "my-free-tier"}, # 👈 KEY CHANGE
	"duration": "30min"
}'
  • How to upgrade / downgrade request? Change the alias mapping

Step 3: Test the key

curl -X POST "https://0.0.0.0:4000/key/generate" \
-H "Authorization: Bearer <user-key>" \
-H "Content-Type: application/json" \
-d '{
    "model": "gpt-3.5-turbo", 
    "messages": [
        {
            "role": "user",
            "content": "this is a test request, write a short poem"
        }
    ]
}'

Advanced​

Pass LiteLLM Key in custom header​

Use this to make LiteLLM proxy look for the virtual key in a custom header instead of the default "Authorization" header

Step 1 Define litellm_key_header_name name on litellm config.yaml

model_list:
  - model_name: fake-openai-endpoint
    litellm_params:
      model: openai/fake
      api_key: fake-key
      api_base: https://exampleopenaiendpoint-production.up.railway.app/

general_settings: 
  master_key: sk-1234 
  litellm_key_header_name: "X-Litellm-Key" # 👈 Key Change

Step 2 Test it

In this request, litellm will use the Virtual key in the X-Litellm-Key header

curl http://localhost:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-Litellm-Key: Bearer sk-1234" \
  -H "Authorization: Bearer bad-key" \
  -d '{
    "model": "fake-openai-endpoint",
    "messages": [
      {"role": "user", "content": "Hello, Claude gm!"}
    ]
  }'

Expected Response

Expect to see a successful response from the litellm proxy since the key passed in X-Litellm-Key is valid

{"id":"chatcmpl-f9b2b79a7c30477ab93cd0e717d1773e","choices":[{"finish_reason":"stop","index":0,"message":{"content":"\n\nHello there, how may I assist you today?","role":"assistant","tool_calls":null,"function_call":null}}],"created":1677652288,"model":"gpt-3.5-turbo-0125","object":"chat.completion","system_fingerprint":"fp_44709d6fcb","usage":{"completion_tokens":12,"prompt_tokens":9,"total_tokens":21}

Enable/Disable Virtual Keys​

Disable Keys

curl -L -X POST 'http://0.0.0.0:4000/key/block' \
-H 'Authorization: Bearer LITELLM_MASTER_KEY' \
-H 'Content-Type: application/json' \
-d '{"key": "KEY-TO-BLOCK"}'

Expected Response:

{
  ...
  "blocked": true
}

Enable Keys

curl -L -X POST 'http://0.0.0.0:4000/key/unblock' \
-H 'Authorization: Bearer LITELLM_MASTER_KEY' \
-H 'Content-Type: application/json' \
-d '{"key": "KEY-TO-UNBLOCK"}'
{
  ...
  "blocked": false
}

Custom /key/generate​

If you need to add custom logic before generating a Proxy API Key (Example Validating team_id)

1. Write a custom custom_generate_key_fn​

The input to the custom_generate_key_fn function is a single parameter: data (Type: GenerateKeyRequest)

The output of your custom_generate_key_fn should be a dictionary with the following structure

{
    "decision": False,
    "message": "This violates LiteLLM Proxy Rules. No team id provided.",
}

  • decision (Type: bool): A boolean value indicating whether the key generation is allowed (True) or not (False).

  • message (Type: str, Optional): An optional message providing additional information about the decision. This field is included when the decision is False.

async def custom_generate_key_fn(data: GenerateKeyRequest)-> dict:
        """
        Asynchronous function for generating a key based on the input data.

        Args:
            data (GenerateKeyRequest): The input data for key generation.

        Returns:
            dict: A dictionary containing the decision and an optional message.
            {
                "decision": False,
                "message": "This violates LiteLLM Proxy Rules. No team id provided.",
            }
        """
        
        # decide if a key should be generated or not
        print("using custom auth function!")
        data_json = data.json()  # type: ignore

        # Unpacking variables
        team_id = data_json.get("team_id")
        duration = data_json.get("duration")
        models = data_json.get("models")
        aliases = data_json.get("aliases")
        config = data_json.get("config")
        spend = data_json.get("spend")
        user_id = data_json.get("user_id")
        max_parallel_requests = data_json.get("max_parallel_requests")
        metadata = data_json.get("metadata")
        tpm_limit = data_json.get("tpm_limit")
        rpm_limit = data_json.get("rpm_limit")

        if team_id is not None and team_id == "litellm-core-infra@gmail.com":
            # only team_id="litellm-core-infra@gmail.com" can make keys
            return {
                "decision": True,
            }
        else:
            print("Failed custom auth")
            return {
                "decision": False,
                "message": "This violates LiteLLM Proxy Rules. No team id provided.",
            }

2. Pass the filepath (relative to the config.yaml)​

Pass the filepath to the config.yaml

e.g. if they're both in the same dir - ./config.yaml and ./custom_auth.py, this is what it looks like:

model_list: 
  - model_name: "openai-model"
    litellm_params: 
      model: "gpt-3.5-turbo"

litellm_settings:
  drop_params: True
  set_verbose: True

general_settings:
  custom_key_generate: custom_auth.custom_generate_key_fn

Upperbound /key/generate params​

Use this, if you need to set default upperbounds for max_budget, budget_duration or any key/generate param per key.

Set litellm_settings:upperbound_key_generate_params:

litellm_settings:
  upperbound_key_generate_params:
    max_budget: 100 # Optional[float], optional): upperbound of $100, for all /key/generate requests
    budget_duration: "10d" # Optional[str], optional): upperbound of 10 days for budget_duration values
    duration: "30d" # Optional[str], optional): upperbound of 30 days for all /key/generate requests
    max_parallel_requests: 1000 # (Optional[int], optional): Max number of requests that can be made in parallel. Defaults to None.
    tpm_limit: 1000 #(Optional[int], optional): Tpm limit. Defaults to None.
    rpm_limit: 1000 #(Optional[int], optional): Rpm limit. Defaults to None.

** Expected Behavior **

  • Send a /key/generate request with max_budget=200
  • Key will be created with max_budget=100 since 100 is the upper bound

Default /key/generate params​

Use this, if you need to control the default max_budget or any key/generate param per key.

When a /key/generate request does not specify max_budget, it will use the max_budget specified in default_key_generate_params

Set litellm_settings:default_key_generate_params:

litellm_settings:
  default_key_generate_params:
    max_budget: 1.5000
    models: ["azure-gpt-3.5"]
    duration:     # blank means `null`
    metadata: {"setting":"default"}
    team_id: "core-infra"

✨ Key Rotations​

info

This is an Enterprise feature.

Enterprise Pricing

Get free 7-day trial key

Rotate an existing API Key, while optionally updating its parameters.


curl 'http://localhost:4000/key/sk-1234/regenerate' \
  -X POST \
  -H 'Authorization: Bearer sk-1234' \
  -H 'Content-Type: application/json' \
  -d '{
    "max_budget": 100,
    "metadata": {
      "team": "core-infra"
    },
    "models": [
      "gpt-4",
      "gpt-3.5-turbo"
    ]
  }'

Read More

👉 API REFERENCE DOCS

Scheduled Key Rotations​

LiteLLM can rotate virtual keys automatically based on time intervals you define.

Prerequisites​

  1. Database connection required - Key rotation requires a connected database to track rotation schedules
  2. Enable the rotation worker - Set environment variable LITELLM_KEY_ROTATION_ENABLED=true
  3. Configure check interval - Optionally set LITELLM_KEY_ROTATION_CHECK_INTERVAL_SECONDS (default: 86400 seconds / 24 hours)

How it works​

  1. When creating a virtual key, set auto_rotate: true and rotation_interval (duration string)
  2. LiteLLM calculates the next rotation time as now + rotation_interval and stores it in the database
  3. A background job periodically checks for keys where the rotation time has passed
  4. When a key is due for rotation, LiteLLM automatically regenerates it and invalidates the old key string
  5. The new rotation time is calculated and the cycle continues

Create a key with auto rotation​

API

curl 'http://0.0.0.0:4000/key/generate' \
  -H 'Authorization: Bearer <your-master-key>' \
  -H 'Content-Type: application/json' \
  -d '{
        "models": ["gpt-4o"],
        "auto_rotate": true,
        "rotation_interval": "30d"
      }'

LiteLLM UI

On the LiteLLM UI, Navigate to the Keys page and click on Generate Key > Key Lifecycle > Enable Auto Rotation

Valid rotation_interval formats:

  • "30s" - 30 seconds
  • "30m" - 30 minutes
  • "30h" - 30 hours
  • "30d" - 30 days
  • "90d" - 90 days

Update existing key to enable rotation​

API

curl 'http://0.0.0.0:4000/key/update' \
  -H 'Authorization: Bearer <your-master-key>' \
  -H 'Content-Type: application/json' \
  -d '{
        "key": "sk-existing-key",
        "auto_rotate": true,
        "rotation_interval": "90d"
      }'

LiteLLM UI

On the LiteLLM UI, Navigate to the Keys page. Select the key you want to update and click on Edit Settings > Auto-Rotation Settings

Environment variables​

Set these environment variables when starting the proxy:

VariableDescriptionDefault
LITELLM_KEY_ROTATION_ENABLEDEnable the rotation workerfalse
LITELLM_KEY_ROTATION_CHECK_INTERVAL_SECONDSHow often to scan for keys to rotate (in seconds)86400 (24 hours)

Example:

export LITELLM_KEY_ROTATION_ENABLED=true
export LITELLM_KEY_ROTATION_CHECK_INTERVAL_SECONDS=3600  # Check every hour

litellm --config config.yaml

Temporary Budget Increase​

Use the /key/update endpoint to increase the budget of an existing key.

curl -L -X POST 'http://localhost:4000/key/update' \
-H 'Authorization: Bearer sk-1234' \
-H 'Content-Type: application/json' \
-d '{"key": "sk-b3Z3Lqdb_detHXSUp4ol4Q", "temp_budget_increase": 100, "temp_budget_expiry": "10d"}'

API Reference

Restricting Key Generation​

Use this to control who can generate keys. Useful when letting others create keys on the UI.

litellm_settings:
  key_generation_settings:
    team_key_generation:
      allowed_team_member_roles: ["admin"]
      required_params: ["tags"] # require team admins to set tags for cost-tracking when generating a team key
    personal_key_generation: # maps to 'Default Team' on UI 
      allowed_user_roles: ["proxy_admin"]

Spec​

key_generation_settings: Optional[StandardKeyGenerationConfig] = None

Types​

class StandardKeyGenerationConfig(TypedDict, total=False):
    team_key_generation: TeamUIKeyGenerationConfig
    personal_key_generation: PersonalUIKeyGenerationConfig

class TeamUIKeyGenerationConfig(TypedDict):
    allowed_team_member_roles: List[str] # either 'user' or 'admin'
    required_params: List[str] # require params on `/key/generate` to be set if a team key (team_id in request) is being generated


class PersonalUIKeyGenerationConfig(TypedDict):
    allowed_user_roles: List[LitellmUserRoles] 
    required_params: List[str] # require params on `/key/generate` to be set if a personal key (no team_id in request) is being generated


class LitellmUserRoles(str, enum.Enum):
    """
    Admin Roles:
    PROXY_ADMIN: admin over the platform
    PROXY_ADMIN_VIEW_ONLY: can login, view all own keys, view all spend
    ORG_ADMIN: admin over a specific organization, can create teams, users only within their organization

    Internal User Roles:
    INTERNAL_USER: can login, view/create/delete their own keys, view their spend
    INTERNAL_USER_VIEW_ONLY: can login, view their own keys, view their own spend


    Team Roles:
    TEAM: used for JWT auth


    Customer Roles:
    CUSTOMER: External users -> these are customers

    """

    # Admin Roles
    PROXY_ADMIN = "proxy_admin"
    PROXY_ADMIN_VIEW_ONLY = "proxy_admin_viewer"

    # Organization admins
    ORG_ADMIN = "org_admin"

    # Internal User Roles
    INTERNAL_USER = "internal_user"
    INTERNAL_USER_VIEW_ONLY = "internal_user_viewer"

    # Team Roles
    TEAM = "team"

    # Customer Roles - External users of proxy
    CUSTOMER = "customer"

Next Steps - Set Budgets, Rate Limits per Virtual Key​

Follow this doc to set budgets, rate limiters per virtual key with LiteLLM

Endpoint Reference (Spec)​

Keys​

👉 API REFERENCE DOCS​

Users​

👉 API REFERENCE DOCS​

Teams​

👉 API REFERENCE DOCS​