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Mateo Wang e333ccabdb
fix(scim)!: delete a group through the team delete's bulk path instead of one member at a time (#47544)
* fix(scim): write a group's roster in one locked transaction instead of one member at a time

POST, PUT and PATCH /scim/v2/Groups resolve every member in one query and write the roster, the
membership rows and the users' team tags in one transaction under the team's advisory lock, so a
500-member push runs a fixed number of statements instead of thousands. PUT now answers with the
roster it just wrote

* test(scim): assert the roster the IdP gets back and boot the bulk roster cell with two workers

* fix(scim): skip the team lock for a rename-only PATCH and lock member rows in id order before the roster write

A PATCH naming no members opened the roster transaction and took the team advisory lock for nothing. A SIGKILLed worker then left its orphaned query engine holding that lock until the 60 s transaction timeout, and /team/delete, which takes the same lock, timed out behind it. An empty delta is now answered from a plain team read, with no transaction and no lock

Two groups trading members in parallel locked user rows in opposite orders, and one request died with a Postgres deadlock. Every user row a push touches is now locked with SELECT ... ORDER BY user_id FOR UPDATE before the first write, so the two requests serialize

The bulk roster cell gets a 120 s client through a new owned_proxy_process client_timeout, so an unfixed push fails on the statement count instead of the harness clock, requires positive counts on both pushes, and gains a parallel roster-trade test that answered 500 before the lock

* fix(scim): evict the cached team on a group rename and read a no-op roster from the writer

A rename-only PUT or PATCH wrote the new alias and left the team cached under
its id and old alias on every worker, so keys kept logging spend against the
old team alias until the TTL expired. The group write now evicts the cached
team (and broadcasts the eviction) right after the alias or metadata update.

sync_team_roster reads the team from the writer when the plan names nobody,
so a replica cannot hand back the pre-rename row; a plan already matching the
roster returns inside the lock without writing, evicting, or emitting the
members metric; the response is built from the written row, so lastModified
reflects the roster write; and detaching a removed member bumps the user's
updated_at like every other user write.

* fix(scim): bump detached members' updated_at in UTC

The detach UPDATE wrote updated_at = CURRENT_TIMESTAMP, which Postgres casts
into Prisma's naive timestamp column in the session timezone, so on a database
whose session is not UTC the removed member's row landed hours away from the
UTC instants Prisma itself writes. Write NOW() AT TIME ZONE 'UTC' instead, and
have the bulk roster cell assert the bumped row sits between two reads of the
database's own UTC clock taken around the replace.

* fix(scim): delete a group through the team delete's bulk path instead of one member at a time

* fix(scim): chunk the group write's member lookups under the bind cap

Every Prisma "in" filter the group write issues bound one parameter per
member with nothing bounding the list, which check_unbounded_in_lists
reports as 11 new findings. The single-field lookups now go through
litellm.repositories.chunked_in (caller_transaction inside the roster
transaction, per_chunk_ok for the role recompute), and the one
cross-field OR read slices its values at IN_LIST_CHUNK_SIZE and records
the bound. A push of IN_LIST_CHUNK_SIZE + 1 members now reads in two
slices, and a member named only in the last slice still resolves.

* fix(scim): demote a deleted admin group's members before the team delete so a failed delete stays retryable

* fix(scim): recompute member roles again after the team delete so a concurrent group write cannot regrant admin

* fix(proxy): send bulk cache evictions in slices so the broadcaster drops none

Veria pointed out that the invalidation publisher caps its pending tasks at
1,024 and drops the excess with a warning, and that a group push now detaches
every removed member's keys in one call instead of one member at a time, so a
removal of more than roughly 340 members (three cache keys each) silently left
stale key objects on the other replicas. The merge base never hit the cap
because each member was a separate request.

Bulk evictions (team, user, organization, and session key deletes, plus the
roster settle) now publish in slices of 256 and wait, bounded at two seconds,
for the backlog already handed to the event loop before each slice. A Redis
that never answers costs a bulk caller at most that wait per slice instead of
wedging the request, and single-key callers are untouched. Regression tests
push 1,500 keys and a 500-member removal through a slow publisher and assert
every eviction reaches Redis; both fail against the previous tip.

* fix(proxy): clear this worker's cache before pacing bulk eviction broadcasts

Greptile pointed out that pacing the broadcasts in slices also paced the
local eviction: a bulk delete waited for the publish backlog before dropping
the next slice from this worker's own memory, so on a Redis that accepts
connections but never answers a key deleted from the database kept
authenticating on the handling worker for up to two seconds per slice. The
merge base cleared every key locally at once.

Bulk evictions now drop every affected entry from this worker's memory first,
through the cache's own partition lookup since key objects live apart from
the other auth objects, and only then publish in paced slices. The roster
settle does the same for the deleted tokens, the JWT mapping keys and every
changed member's user and membership entries before any step that can wait.
Regression tests run both paths against a publisher that never answers and
check that nothing is still cached on this worker before the first bound
elapses; both fail with the local eviction removed.

* fix(scim): write recomputed member roles only where the membership still backs them

* fix(team): report the users a team delete detaches so SCIM demotes late-added members

* test(scim): audit cells for the bulk group delete

Move the SCIM group helpers into tests/integration/_support/scim.py and add the delete cells: a member's other
group survives, the admin group's members are demoted and the audit row names the SCIM caller, a member a
concurrent PUT adds while the delete waits on the team lock is demoted too, unknown, repeated, non-admin and
hostile ids, an empty group, the peer proxy, a 20-delete burst across both proxies, and a delete after a worker
was SIGKILLed

* fix(proxy): drop the Redis copies of bulk-evicted auth objects before pacing the broadcasts

* docs(proxy): drop the module docstring that repeated the PR description

* fix(team): sweep deleted team references only under the lock so a late-added member is demoted

The unlocked sweep that ran before the team's advisory lock stripped a member a
concurrent group write added after the roster was read, so neither the roster
snapshot nor the locked sweep's RETURNING named them and the SCIM recompute
left them proxy_admin after the admin group was gone. The locked sweep does the
same strip and reports whom it stripped, so it is the only sweep now.

The integration cell holds the delete on a member's user row so a PATCH lands
between the roster read and the lock, then checks the late member is demoted.
Both waiter queries in the SCIM support module return their count as text so
the first poll parses.

* chore(team): carry the unbounded-IN baseline entries to delete_validated_teams

The delete pass moved from delete_team and the unlocked sweep into delete_validated_teams, so the checker's baseline names the function the two team_id IN lists now live in

* test(scim): expect the master key alias in the audit row and send post-kill requests on a fresh connection

* fix(scim): bound bulk cache evictions to one Redis round trip and close lock-order gaps

Bulk key evictions now drop entries from memory, delete them from Redis in one
chunked DEL, and broadcast every key in one pipelined publish, so a large roster
removal no longer overflows the publisher's pending cap or costs a Redis round
trip per member. A push waits for in-flight membership loads before evicting.

User rows are locked in byte order to match the spend writer, a bulk user delete
takes every team lock before its first user write, and a POST whose roster write
fails deletes the empty team so the IdP retry creates it again.

* test(team): observe delete broadcasts at the Redis layer

* fix(scim): lock user rows in id order on every multi-row writer and create unprovisioned members concurrently

* fix(team): chunk the email lookup behind the member row lock

* fix(scim): create a member deleted mid-push again instead of failing the group write

* fix(scim): refuse strict-mode mid-push deletes with 400 and check license seats once per batch

A member deleted mid-push is created again only when scim_upsert_user allows it,
under the verb's own created_via. New group members are checked against the
license seat limit as one batch before any is created. Auth cache publish drops
log the key count instead of the key.

* fix(scim): lock member rows while recomputing admin roles after a group push

* fix(users): re-read teams under the row locks in bulk user delete so a racing group push keeps no deleted member

* fix(users): take /user/delete and SCIM DELETE /Users users off their current teams under the row locks so a racing group push keeps no deleted member

* fix(scim): keep retrying a push while deletes race it, lock rows in member bulk delete, evict removed keys from Redis first

A group push gave up after one retry when SCIM user deletes kept landing between attempts, answering 500 in 9 of 10 race rounds. It now retries while each attempt finds newly deleted members, and gives up only when a member it created again goes missing a second time.

The team member bulk delete now locks the removed members' user rows in the shared order and takes the team off their teams arrays in one array_remove statement, so it no longer writes back a teams array read before a concurrent push added another team.

A push that removes members now drops their deleted team keys from memory and Redis together with the members' other cache entries before the team eviction, so a removed key cannot refill from Redis mid-cleanup.

* fix(user-delete): keep the team alias label on the team members gauge after removals

* test(integration): count relay statements over plaintext so an SSL-enabled Postgres does not hide them

* fix(user-delete): skip a team deleted while the user delete waited on its lock instead of answering 404

* fix(scim): answer 404 and roll back when the team is deleted during a roster write

* test(integration): audit cells for SCIM bulk roster writes, user delete locking and the eviction broadcast

* test(scim): cover deleting a SCIM group through the team delete's bulk path

* fix(scim): evict a deleted group's member caches in bulk and drop cached roles after a recompute

* fix(scim): answer 404 to a group delete that lost a race to another delete

* fix(scim): chunk the locked team lookup and delete in the team delete transaction

* fix(scim): keep service-account keys and team models on a group delete and write its records once under the lock

* fix(scim): demote a deleted group's members inside the delete transaction

The admin-group role write now runs on the team delete's transaction, over the
roster read under the team lock, so a failed delete leaves roles untouched and
a member added while the delete waited is demoted with the rest. The delete
transaction also waits for a free connection as long as it may run, so a burst
of deletes queues instead of failing after Prisma's two-second default. Every
member in the 5-vs-500 statement test now holds a key.

* fix(audit): write deleted keys' audit rows in one insert

A delete that removes many keys wrote one audit insert task per key, and those tasks held pool connections the delete's follow-up writes waited on. The race test now waits on any lock wait behind the delete.
2026-10-21 00:59:23 +00:00
.cargo feat(rust): add litellm-db and litellm-db-testing workspace scaffolding (#43504) 2026-09-27 18:48:45 -07:00
.circleci ci: run mcp interactions and redis cluster iam integration tests only in circleci (#46780) 2026-10-15 16:53:36 -07:00
.devcontainer build: migrate packaging, CI, and Docker from Poetry to uv (#25007) 2026-04-09 11:46:23 -07:00
.githooks chore(hooks): drop Conventional Branches pre-push hook in favor of litellm_ prefix (#44951) 2026-10-20 00:35:39 +00:00
.github feat(extraction): add /v1/extraction with Cloudflare Clairic support (#47473) 2026-10-20 15:51:45 -07:00
.semgrep/rules security: remove .claude/settings.json and add semgrep rule to prevent re-adding 2026-03-25 11:57:43 -07:00
backend fix(backend): retain Prometheus metrics during startup (#47129) 2026-10-17 17:10:42 +00:00
ci_cd ci(cost map): remove the generated model prices JSON schema (#47064) 2026-10-17 05:46:31 +00:00
cookbook fix(bedrock): send batch jobs to a configured control-plane endpoint (#47260) 2026-10-20 12:30:16 -07:00
db_scripts fix(vector-stores): keep proxy context out of provider vector store metadata (#47021) 2026-10-17 12:51:47 -07:00
docker feat(docker): stop, start, and uninstall a quickstart install with litellm-gateway (#46486) 2026-10-15 10:08:06 -07:00
enterprise fix(responses): send the billed background response cost to the creating key's and team's loggers (#47506) 2026-10-20 23:22:21 +00:00
examples chore: litellm oss staging (#31185) 2026-06-26 09:17:44 -07:00
gateway feat(extraction): add /v1/extraction with Cloudflare Clairic support (#47473) 2026-10-20 15:51:45 -07:00
helm fix(helm): stop litellm-helm from injecting placeholder models into every install (#47056) 2026-10-19 12:21:18 -07:00
litellm fix(scim)!: delete a group through the team delete's bulk path instead of one member at a time (#47544) 2026-10-21 00:59:23 +00:00
litellm-proxy-extras bump: litellm-enterprise 0.1.78 -> 0.1.79, litellm-proxy-extras 0.4.110 -> 0.4.111, litellm 1.107.0 -> 1.108.0 (#47668) 2026-10-20 22:37:26 +00:00
litellm-rust refactor(rust-bridge): detect Python-only features in the catalog instead of Rust declines (#46714) 2026-10-20 15:06:25 -07:00
litellm_cli perf(cli): start lite without initializing the litellm SDK (#46803) 2026-10-17 04:53:32 +00:00
migrations build(docker): cache the Rust extension build in its own stage (#47033) 2026-10-16 20:49:53 -07:00
packaging chore(deps): require anyio>=4.14.0 to rule out the lock-waiter deadlock (#47378) 2026-10-19 12:37:47 -07:00
scripts chore(hooks): drop Conventional Branches pre-push hook in favor of litellm_ prefix (#44951) 2026-10-20 00:35:39 +00:00
terraform feat(ui): show kubernetes pods on the model page (#44666) 2026-10-19 09:58:20 -07:00
tests fix(scim)!: delete a group through the team delete's bulk path instead of one member at a time (#47544) 2026-10-21 00:59:23 +00:00
ui fix(ui): show the budget spend limit and rate limits without a collapsed section (#47662) 2026-10-20 17:58:05 -07:00
vscode-extension chore(deps-dev): bump vite from 8.3.0 to 8.3.4 in /vscode-extension (#47627) 2026-10-21 00:09:17 +00:00
.dockerignore build(docker): build the Admin UI from source in a build-platform-pinned stage (#31130) 2026-06-25 23:41:08 -07:00
.env.example docs: stop advertising sk-1234 as the master key in shipped configs and examples 2026-09-19 12:59:48 -07:00
.git-blame-ignore-revs chore: ignore the mechanical lint and typing sweeps in git blame 2026-08-06 11:39:34 +00:00
.gitattributes feat(ui): generate dashboard API types from the proxy OpenAPI spec (#29816) 2026-06-05 17:20:01 -07:00
.gitguardian.yaml fix(security): remove the publicly known master key from the repo (#44718) 2026-10-06 10:55:24 -07:00
.gitignore chore: ignore .mypy_cache (#45628) 2026-10-09 18:26:19 +00:00
.grype.yaml ci(image-scan): ignore zlib CVE-2026-85091 until Wolfi ships the fix 2026-09-15 19:23:21 -07:00
.npmrc [Fix] CI/Tooling: Correct min-release-age value in .npmrc files 2026-04-29 19:49:27 -07:00
AGENTS.md docs(agents): keep directory rules in nested AGENTS.md and pin integration tests to CircleCI (#46796) 2026-10-16 14:57:49 -07:00
ARCHITECTURE.md refactor(anthropic): rename experimental_pass_through to pass_through (#43329) 2026-09-26 13:00:50 -07:00
codecov.yaml test: migrate tests/proxy_behavior into integration and unit tiers (#45939) 2026-10-11 08:28:42 -07:00
CONTRIBUTING.md chore(hooks): drop Conventional Branches pre-push hook in favor of litellm_ prefix (#44951) 2026-10-20 00:35:39 +00:00
cosign.pub [Infra] Add release workflow and cosign public key 2026-03-31 14:30:27 -07:00
docker-compose.hardened.yml build(docker): drop the no-op PROXY_EXTRAS_SOURCE switch from the non-root image (#44097) 2026-10-01 17:06:08 -07:00
docker-compose.liteadmin.yml feat(enterprise): bundle LiteAdmin Slack with native gateway login (#44444) 2026-10-03 17:28:18 -07:00
docker-compose.yml feat: add read-replica routing for Prisma DB via DATABASE_URL_READ_REPLICA (#27493) 2026-05-08 21:05:50 -07:00
Dockerfile refactor(lens): connect LiteLLM to the independent Lens service (#45529) 2026-10-09 16:17:05 -07:00
GEMINI.md chore: consolidate CLAUDE.md into AGENTS.md 2026-09-19 02:30:35 +00:00
LICENSE refactor: creating enterprise folder 2024-02-15 12:54:13 -08:00
license_cache.json Add granian as a ASGI compliant web server. Provider better throughput stability, (#26027) 2026-05-21 19:08:37 -07:00
Makefile chore(hooks): drop Conventional Branches pre-push hook in favor of litellm_ prefix (#44951) 2026-10-20 00:35:39 +00:00
mcp_servers.json Add ScrapeGraph MCP server configuration (#18923) 2026-01-11 21:57:46 +05:30
model_prices_and_context_window.json feat(wandb): add Beam 1.0 and GLM-5.3 to the cost map (#47690) 2026-10-20 17:39:17 -07:00
model_prices_and_context_window.schema.json feat(extraction): add /v1/extraction with Cloudflare Clairic support (#47473) 2026-10-20 15:51:45 -07:00
osv-scanner.toml build(deps): bump pillow and dashboard vite, defer certifi to clear osv-scan (#47678) 2026-10-20 23:12:28 +00:00
package-lock.json chore(deps): refresh dependency locks 2026-05-04 11:36:18 -07:00
package.json chore(deps): refresh dependency locks 2026-05-04 11:36:18 -07:00
policy_templates.json fix(packaging): keep wheel paths under Windows MAX_PATH for Store Python (#43903) 2026-09-30 22:20:36 +00:00
prometheus.yml build(docker-compose.yml): add prometheus scraper to docker compose 2024-07-24 10:09:23 -07:00
provider_endpoints_support.json feat(search): add DeepSeek as a /v1/search provider (#47401) 2026-10-19 20:35:04 +00:00
proxy_server_config.yaml test(ci): refresh qualified retired OpenAI fixtures (#43938) 2026-09-30 16:10:18 -07:00
pyproject.toml build(deps): bump pillow and dashboard vite, defer certifi to clear osv-scan (#47678) 2026-10-20 23:12:28 +00:00
pyrightconfig.json perf(cli): start lite without initializing the litellm SDK (#46803) 2026-10-17 04:53:32 +00:00
qa_sticky_session.sh fix(security): remove the publicly known master key from the repo (#44718) 2026-10-06 10:55:24 -07:00
README.md feat(harness): add pi harness for litellm.agent() (#45467) 2026-10-20 09:01:40 +00:00
render.yaml feat(proxy)!: refuse to start with an unset, empty, or publicly known master key 2026-09-19 13:44:00 -07:00
router_plugins.json feat(router): add router plugin reference catalog (#33746) 2026-07-17 18:46:20 +00:00
ruff-strict.toml feat(guardrails): add Airia guardrail integration (#40784) 2026-10-14 15:45:47 -07:00
ruff-tests.toml test: gate the test tree on fifteen assertion and handler rules it already satisfies (#38361) 2026-08-26 16:05:34 -07:00
ruff.toml ci(lint): gate every rule on its merge-base count and cap Anys at a fixed total (#40193) 2026-10-08 05:39:29 +00:00
rust-toolchain.toml fix(ci): pin workflow toolchain dependencies 2026-09-02 12:16:25 -07:00
schema.prisma fix(interactions): keep background interaction bills through crashes, late restarts, and deployment keys (#45743) 2026-10-16 12:00:08 +00:00
security.md docs(security): point readers to the security announcements mailing list signup (#43713) 2026-09-29 13:15:37 +00:00
taplo.toml fix(agentcore): simplify agentcore streaming (#17141) 2026-01-19 05:20:24 -08:00
uv.lock build(deps): bump pillow and dashboard vite, defer certifi to clear osv-scan (#47678) 2026-10-20 23:12:28 +00:00
whitelisted_bedrock_models.txt fix(bedrock): add the bare Pegasus 1.5 row and take GPT-5.x context windows from the model cards (#45621) 2026-10-09 11:06:54 -07:00

🚅 LiteLLM

LiteLLM AI Gateway

Open Source AI Gateway for 100+ LLMs. Self-hosted. Enterprise-ready. Call any LLM in OpenAI format.

Deploy to Render Deploy on Railway Deploy on AWS Deploy on GCP

LiteLLM Proxy Server (AI Gateway) | Hosted Proxy | Enterprise Tier | Website

PyPI Version GitHub Stars Y Combinator W23 Whatsapp Discord Slack CodSpeed

LiteLLM AI Gateway

What is LiteLLM

LiteLLM is an open source AI Gateway that gives you a single, unified interface to call 100+ LLM providers — OpenAI, Anthropic, Gemini, Bedrock, Azure, and more — using the OpenAI format.

Use it as a Python SDK for direct library integration, or deploy the AI Gateway (Proxy Server) as a centralized service for your team or organization.

Jump to LiteLLM Proxy (LLM Gateway) Docs
Jump to Supported LLM Providers


Why LiteLLM

Managing LLM calls across providers gets complicated fast — different SDKs, auth patterns, request formats, and error types for every model. LiteLLM removes that friction:

  • Unified API — one interface for 100+ LLMs, no provider-specific SDK juggling
  • Drop-in OpenAI compatibility — swap providers without rewriting your code
  • Production-ready gateway — virtual keys, spend tracking, guardrails, load balancing, and an admin dashboard out of the box
  • 8ms P95 latency at 1k RPS (benchmarks)

OSS Adopters

Stripe image Google ADK Greptile OpenHands

Netflix

OpenAI Agents SDK

Features

LLMs - Call 100+ LLMs (Python SDK + AI Gateway)

All Supported Endpoints - /chat/completions, /responses, /embeddings, /images, /audio, /batches, /rerank, /a2a, /messages and more.

Python SDK

uv add litellm

An independent litellm-core distribution provides the Python SDK with the same import litellm API and runtime dependencies. It has no optional extras, CLI entry points, or bundled dashboard. Install one SDK distribution per environment because litellm and litellm-core own overlapping Python files. Use litellm for the proxy, CLI, and optional extras

Build and install core from this checkout while its release integration is pending:

python scripts/build_core_distribution.py --out-dir dist/core
python -m pip install dist/core/litellm_core-*.whl

The builder requires Git, uv and the Rust build toolchain. It reads the release version from the root pyproject.toml, leaves source files unchanged, and produces a wheel and a self-contained sdist in dist/core. Run installation in a fresh environment without litellm

from litellm import completion
import os

os.environ["OPENAI_API_KEY"] = "your-openai-key"
os.environ["ANTHROPIC_API_KEY"] = "your-anthropic-key"

# OpenAI
response = completion(model="openai/gpt-4o", messages=[{"role": "user", "content": "Hello!"}])

# Anthropic  
response = completion(model="anthropic/claude-sonnet-4-20250514", messages=[{"role": "user", "content": "Hello!"}])

AI Gateway (Proxy Server)

Getting Started - E2E Tutorial - Setup virtual keys, make your first request

uv tool install 'litellm[proxy]'
litellm --model gpt-4o
import openai

client = openai.OpenAI(api_key="anything", base_url="http://0.0.0.0:4000")
response = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Hello!"}]
)

Docs: LLM Providers

Agents - Invoke A2A Agents (Python SDK + AI Gateway)

Supported Providers - LangGraph, Vertex AI Agent Engine, Azure AI Foundry, Bedrock AgentCore, Pydantic AI

Python SDK - A2A Protocol

from litellm.a2a_protocol import A2AClient
from a2a.types import SendMessageRequest, MessageSendParams
from uuid import uuid4

client = A2AClient(base_url="http://localhost:10001")

request = SendMessageRequest(
    id=str(uuid4()),
    params=MessageSendParams(
        message={
            "role": "user",
            "parts": [{"kind": "text", "text": "Hello!"}],
            "messageId": uuid4().hex,
        }
    )
)
response = await client.send_message(request)

AI Gateway (Proxy Server)

Step 1. Add your Agent to the AI Gateway — set protocolVersion to 1.0 or 0.3 per agent

Step 2. Call Agent via A2A SDK (requires a2a-sdk>=1.1.0)

import httpx
from a2a.client import A2ACardResolver, ClientConfig, ClientFactory
from a2a.types import Message, Part, Role, SendMessageRequest
from a2a.utils.constants import TransportProtocol
from uuid import uuid4

base_url = "http://localhost:4000/a2a/my-agent"  # LiteLLM proxy + agent name
headers = {"Authorization": "Bearer <your-master-key>"}    # LiteLLM master key or a virtual key

async with httpx.AsyncClient(headers=headers, timeout=60.0) as http_client:
    resolver = A2ACardResolver(httpx_client=http_client, base_url=base_url)
    agent_card = await resolver.get_agent_card()
    config = ClientConfig(
        httpx_client=http_client,
        streaming=False,
        supported_protocol_bindings=[TransportProtocol.JSONRPC, TransportProtocol.HTTP_JSON],
    )
    client = ClientFactory(config).create(agent_card)

    request = SendMessageRequest(
        message=Message(
            message_id=uuid4().hex,
            role=Role.ROLE_USER,
            parts=[Part(text="Hello!")],
        )
    )
    async for event in client.send_message(request):
        populated = event.ListFields()
        if populated and populated[0][0].name in ("message", "msg"):
            print("".join(getattr(p, "text", "") or "" for p in populated[0][1].parts))

Docs: A2A Agent Gateway

MCP Tools - Connect MCP servers to any LLM (Python SDK + AI Gateway)

Python SDK - MCP Bridge

from mcp import ClientSession, StdioServerParameters
from mcp.client.stdio import stdio_client
from litellm import experimental_mcp_client
import litellm

server_params = StdioServerParameters(command="python", args=["mcp_server.py"])

async with stdio_client(server_params) as (read, write):
    async with ClientSession(read, write) as session:
        await session.initialize()

        # Load MCP tools in OpenAI format
        tools = await experimental_mcp_client.load_mcp_tools(session=session, format="openai")

        # Use with any LiteLLM model
        response = await litellm.acompletion(
            model="gpt-4o",
            messages=[{"role": "user", "content": "What's 3 + 5?"}],
            tools=tools
        )

AI Gateway - MCP Gateway

Step 1. Add your MCP Server to the AI Gateway

Step 2. Call MCP tools via /chat/completions

curl -X POST 'http://0.0.0.0:4000/v1/chat/completions' \
  -H 'Authorization: Bearer <your-master-key>' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "gpt-4o",
    "messages": [{"role": "user", "content": "Summarize the latest open PR"}],
    "tools": [{
      "type": "mcp",
      "server_url": "litellm_proxy/mcp/github",
      "server_label": "github_mcp",
      "require_approval": "never"
    }]
  }'

Use with Cursor IDE

{
  "mcpServers": {
    "LiteLLM": {
      "url": "http://localhost:4000/mcp/",
      "headers": {
        "x-litellm-api-key": "Bearer <your-master-key>"
      }
    }
  }
}

For MCP OAuth, an upstream may advertise dynamic client registration but refuse requests with HTTP 401 or 403. If the provider requires a pre-registered OAuth app, configure its credentials.client_id and, when required, credentials.client_secret on the MCP server. This skips dynamic registration in the gateway sign-in flow. The provider must approve the app for MCP access; reaching its authorization page does not establish that login or tool calls will succeed

Docs: MCP Gateway

Agents - Run Claude Code, Codex, OpenCode, pi or Deep Agents on any model (Python SDK)

Python SDK - Agents

import litellm
from litellm import Harness, sandbox

result = litellm.agent(
    Harness.CLAUDE_CODE,  # or Harness.CODEX, Harness.OPENCODE, Harness.PI, Harness.DEEPAGENTS
    "Find why tests/test_router.py is flaky and fix it.",
    sandbox=sandbox.local("./repo"),
    model="litellm_proxy/claude-sonnet-4-5",  # a model group on your AI Gateway
)

print(result.text, result.cost, [f.path for f in result.files])

Set LITELLM_PROXY_API_BASE and LITELLM_PROXY_API_KEY and every model call the agent makes goes through your AI Gateway, tagged harness,claude_code. Drop the litellm_proxy/ prefix to call a provider directly. Install starlette uvicorn plus the agent's CLI (claude, codex, opencode or pi), or deepagents langchain-litellm for Deep Agents.

Docs: Agent Harnesses

Supported Providers (Website Supported Models | Docs)

Provider /chat/completions /messages /responses /embeddings /image/generations /audio/transcriptions /audio/speech /moderations /batches /rerank
Abliteration (abliteration) ✅
AI/ML API (aiml) ✅ ✅ ✅ ✅ ✅
AI21 (ai21) ✅ ✅ ✅
AI21 Chat (ai21_chat) ✅ ✅ ✅
Aleph Alpha ✅ ✅ ✅
Amazon Nova ✅ ✅ ✅
Anthropic (anthropic) ✅ ✅ ✅ ✅
Anthropic Text (anthropic_text) ✅ ✅ ✅ ✅
Anyscale ✅ ✅ ✅
AssemblyAI (assemblyai) ✅ ✅ ✅ ✅
Auto Router (auto_router) ✅ ✅ ✅
AWS - Bedrock (bedrock) ✅ ✅ ✅ ✅ ✅
AWS - Sagemaker (sagemaker) ✅ ✅ ✅ ✅
Azure (azure) ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Azure AI (azure_ai) ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Azure Text (azure_text) ✅ ✅ ✅ ✅ ✅ ✅ ✅
Baseten (baseten) ✅ ✅ ✅
Bytez (bytez) ✅ ✅ ✅
Cerebras (cerebras) ✅ ✅ ✅
Clarifai (clarifai) ✅ ✅ ✅
Cloudflare AI Workers (cloudflare) ✅ ✅ ✅
Codestral (codestral) ✅ ✅ ✅
Cognition (cognition) ✅ ✅ ✅
Cohere (cohere) ✅ ✅ ✅ ✅ ✅
Cohere Chat (cohere_chat) ✅ ✅ ✅
CometAPI (cometapi) ✅ ✅ ✅ ✅
CompactifAI (compactifai) ✅ ✅ ✅
CoralBricks (coralbricks) ✅ ✅ ✅
Custom (custom) ✅ ✅ ✅
Custom OpenAI (custom_openai) ✅ ✅ ✅ ✅ ✅ ✅ ✅
Dashscope (dashscope) ✅ ✅ ✅ ✅ ✅
Databricks (databricks) ✅ ✅ ✅
DataRobot (datarobot) ✅ ✅ ✅
Deepgram (deepgram) ✅ ✅ ✅ ✅
DeepInfra (deepinfra) ✅ ✅ ✅
Deepseek (deepseek) ✅ ✅ ✅
Eden AI (edenai) ✅ ✅ ✅ ✅ ✅ ✅ ✅
ElevenLabs (elevenlabs) ✅ ✅ ✅ ✅ ✅
Empower (empower) ✅ ✅ ✅
Fal AI (fal_ai) ✅ ✅ ✅ ✅
Featherless AI (featherless_ai) ✅ ✅ ✅
Fireworks AI (fireworks_ai) ✅ ✅ ✅
FriendliAI (friendliai) ✅ ✅ ✅
Galadriel (galadriel) ✅ ✅ ✅
GitHub Copilot (github_copilot) ✅ ✅ ✅ ✅
GitHub Models (github) ✅ ✅ ✅
Google - PaLM ✅ ✅ ✅
Google - Vertex AI (vertex_ai) ✅ ✅ ✅ ✅ ✅
Google AI Studio - Gemini (gemini) ✅ ✅ ✅
GradientAI (gradient_ai) ✅ ✅ ✅
Groq AI (groq) ✅ ✅ ✅
Heroku (heroku) ✅ ✅ ✅
Hosted VLLM (hosted_vllm) ✅ ✅ ✅
Huggingface (huggingface) ✅ ✅ ✅ ✅ ✅
Hyperbolic (hyperbolic) ✅ ✅ ✅
IBM - Watsonx.ai (watsonx) ✅ ✅ ✅ ✅
Infinity (infinity) ✅
Jina AI (jina_ai) ✅
Lambda AI (lambda_ai) ✅ ✅ ✅
Lemonade (lemonade) ✅ ✅ ✅
LiteLLM Proxy (litellm_proxy) ✅ ✅ ✅ ✅ ✅
Llamafile (llamafile) ✅ ✅ ✅
LM Studio (lm_studio) ✅ ✅ ✅
Maritalk (maritalk) ✅ ✅ ✅
Meta - Llama API (meta_llama) ✅ ✅ ✅
Mistral AI API (mistral) ✅ ✅ ✅ ✅
ModelScope (modelscope) ✅ ✅ ✅ ✅
Moonshot (moonshot) ✅ ✅ ✅
Morph (morph) ✅ ✅ ✅
Nace (nace)
Nebius AI Studio (nebius) ✅ ✅ ✅ ✅
NLP Cloud (nlp_cloud) ✅ ✅ ✅
Novita AI (novita) ✅ ✅ ✅
Nscale (nscale) ✅ ✅ ✅
Nvidia NIM (nvidia_nim) ✅ ✅ ✅
OCI (oci) ✅ ✅ ✅
Ollama (ollama) ✅ ✅ ✅ ✅
Ollama Chat (ollama_chat) ✅ ✅ ✅
Oobabooga (oobabooga) ✅ ✅ ✅ ✅ ✅ ✅ ✅
OpenAI (openai) ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
OpenAI-like (openai_like) ✅
OpenRouter (openrouter) ✅ ✅ ✅
OVHCloud AI Endpoints (ovhcloud) ✅ ✅ ✅
Perplexity AI (perplexity) ✅ ✅ ✅
Petals (petals) ✅ ✅ ✅
Pinstripes (pinstripes) ✅ ✅ ✅
Predibase (predibase) ✅ ✅ ✅
Qianwen AI Platform (qwen_ai_platform) ✅ ✅ ✅ ✅ ✅ ✅
QwenCloud (qwencloud) ✅ ✅ ✅ ✅ ✅ ✅
Recraft (recraft) ✅
Replicate (replicate) ✅ ✅ ✅
Sagemaker Chat (sagemaker_chat) ✅ ✅ ✅
Sail (sail) ✅ ✅ ✅
Sambanova (sambanova) ✅ ✅ ✅
ScaleDown (scaledown) ✅
Snowflake (snowflake) ✅ ✅ ✅
Strands Decider (strands_decider)
Text Completion Codestral (text-completion-codestral) ✅ ✅ ✅
Text Completion OpenAI (text-completion-openai) ✅ ✅ ✅ ✅ ✅ ✅ ✅
Together AI (together_ai) ✅ ✅ ✅
Topaz (topaz) ✅ ✅ ✅
Triton (triton) ✅ ✅ ✅
Typesafe Decisions API (typesafe)
V0 (v0) ✅ ✅ ✅
Vercel AI Gateway (vercel_ai_gateway) ✅ ✅ ✅
VLLM (vllm) ✅ ✅ ✅
Volcengine (volcengine) ✅ ✅ ✅
VoyageAI by MongoDB (voyage) ✅
WandB Inference (wandb) ✅ ✅ ✅
Watsonx Text (watsonx_text) ✅ ✅ ✅
xAI (xai) ✅ ✅ ✅
Xinference (xinference) ✅

Read the Docs


Get Started

You can use LiteLLM through either the Proxy Server or Python SDK. Both give you a unified interface to access multiple LLMs (100+ LLMs). Choose the option that best fits your needs:

LiteLLM AI Gateway LiteLLM Python SDK
Use Case Central service (LLM Gateway) to access multiple LLMs Use LiteLLM directly in your Python code
Who Uses It? Gen AI Enablement / ML Platform Teams Developers building LLM projects
Key Features Centralized API gateway with authentication and authorization, multi-tenant cost tracking and spend management per project/user, per-project customization (logging, guardrails, caching), virtual keys for secure access control, admin dashboard UI for monitoring and management Direct Python library integration in your codebase, Router with retry/fallback logic across multiple deployments (e.g. Azure/OpenAI) - Router, application-level load balancing and cost tracking, exception handling with OpenAI-compatible errors, observability callbacks (Lunary, MLflow, Langfuse, etc.)

Stable Release: Use docker images with the -stable tag. These have undergone 12 hour load tests, before being published. More information about the release cycle here

Support for more providers. Missing a provider or LLM Platform, raise a feature request.

Deploy on AWS or GCP with Terraform

Run the LiteLLM proxy as a production-ready componentized stack (gateway, backend, UI on separate services; managed Postgres + Redis + object store) using the published Terraform modules. Both modules are on the public Terraform Registry — no auth needed.

AWS — ECS Fargate + Aurora + ElastiCache + ALB

Launch in AWS CloudShell — opens an in-browser shell, already authenticated to your AWS account. Once inside, run:

git clone https://github.com/BerriAI/litellm.git
cd litellm/terraform/litellm/aws/examples/default
cp terraform.tfvars.example terraform.tfvars   # edit region/tenant/env
terraform init && terraform apply

Module page →

Or call the module from your own root config:

# main.tf
terraform {
  required_version = ">= 1.6.0"
  required_providers {
    aws = { source = "hashicorp/aws", version = "~> 5.60" }
  }
}

provider "aws" {
  region = "us-west-2"
}

module "litellm" {
  source  = "BerriAI/litellm/aws"
  version = "~> 1.89"

  region = "us-west-2"
  azs    = ["us-west-2a", "us-west-2b"]
  tenant = "acme"
  env    = "prod"

  # Production: provide an ACM cert. Without one, set allow_plaintext_alb = true
  # (dev/trial only).
  # acm_certificate_arn = "arn:aws:acm:us-west-2:111122223333:certificate/..."
  allow_plaintext_alb = true
}

output "litellm_url" {
  value = module.litellm.alb_dns_name
}
terraform init
terraform apply

Provider API keys live in AWS Secrets Manager; reference ARNs via gateway_extra_secrets. Full input list and architecture diagram on the registry page.

GCP — Cloud Run + Cloud SQL + Memorystore + HTTPS LB

Open in Cloud Shell

Real 1-click. Opens Cloud Shell, clones the terraform-google-litellm module mirror at the latest stable release (a small download instead of the full litellm repo), and walks you through terraform apply via a built-in DeployStack tutorial. Pick the project, the tutorial sets up the Artifact Registry remote repo, writes terraform.tfvars from your answers, and runs apply

Module page →

To call the module from your own config instead, Cloud Run can't pull from ghcr.io directly, so first set up a one-time Artifact Registry remote repo backed by GHCR:

gcloud artifacts repositories create litellm \
  --location=us-central1 \
  --repository-format=docker \
  --mode=remote-repository \
  --remote-docker-repo=https://ghcr.io \
  --project=my-gcp-project

Then:

# main.tf
terraform {
  required_version = ">= 1.6.0"
  required_providers {
    google      = { source = "hashicorp/google",      version = "~> 6.10" }
    google-beta = { source = "hashicorp/google-beta", version = "~> 6.10" }
  }
}

provider "google"      { project = "my-gcp-project"; region = "us-central1" }
provider "google-beta" { project = "my-gcp-project"; region = "us-central1" }

module "litellm" {
  source  = "BerriAI/litellm/google"
  version = "~> 1.89"

  project_id = "my-gcp-project"
  region     = "us-central1"
  tenant     = "acme"
  env        = "prod"

  # Replace my-gcp-project with your GCP project ID (same value as project_id above).
  image_registry = "us-central1-docker.pkg.dev/my-gcp-project/litellm/berriai"

  # Production: provide DNS already pointing at the LB IP for Google-managed certs.
  # Without one, set allow_plaintext_lb = true (dev/trial only).
  # lb_domains         = ["proxy.example.com"]
  allow_plaintext_lb = true
}

output "litellm_url" {
  value = module.litellm.load_balancer_url
}
terraform init
terraform apply

Provider API keys live in Secret Manager; reference resource IDs (e.g. projects/my-gcp-project/secrets/openai-api-key) via gateway_extra_secrets. Full input list and architecture diagram on the registry page.

Both stacks include

  • The full componentized split (gateway / backend / UI as independent services)
  • Managed Postgres (writer + reader) and Redis
  • Versioned object store for proxy state + file uploads
  • An auto-generated LITELLM_MASTER_KEY in your cloud's secret manager
  • A one-off migration job that runs prisma migrate deploy before the proxy starts
  • The same proxy_config surface as the Helm chart — pass YAML as a typed map

The Terraform modules live at terraform/litellm/aws/ and terraform/litellm/gcp/ in this repo; the registry entries are read-only mirrors updated on each release.

Run in Developer Mode

Services

  1. Setup .env file in root
  2. Run dependent services docker-compose up db prometheus

Backend

  1. Run make bootstrap
  2. Start proxy backend: uv run python litellm/proxy/proxy_cli.py

Frontend

  1. Navigate to ui/litellm-dashboard (dependencies were already installed w/ make bootstrap)
  2. Start dashboard: npm run dev

Verify Docker Image Signatures

All LiteLLM Docker images published to GHCR are signed with cosign. Every release is signed with the same key introduced in commit 0112e53.

Verify using the pinned commit hash (recommended):

A commit hash is cryptographically immutable, so this is the strongest way to ensure you are using the original signing key:

cosign verify \
  --key https://raw.githubusercontent.com/BerriAI/litellm/0112e53046018d726492c814b3644b7d376029d0/cosign.pub \
  ghcr.io/berriai/litellm:<release-tag>

Verify using a release tag (convenience):

Tags are protected in this repository and resolve to the same key. This option is easier to read but relies on tag protection rules:

cosign verify \
  --key https://raw.githubusercontent.com/BerriAI/litellm/<release-tag>/cosign.pub \
  ghcr.io/berriai/litellm:<release-tag>

Replace <release-tag> with the version you are deploying (e.g. v1.83.0-stable).


Enterprise

For companies that need better security, user management and professional support

Get an Enterprise License Talk to founders

This covers:

  • ✅ Features under the LiteLLM Commercial License:
  • ✅ Feature Prioritization
  • ✅ Custom Integrations
  • ✅ Professional Support - Dedicated discord + slack
  • ✅ Custom SLAs
  • ✅ Secure access with Single Sign-On

Contributing

We welcome contributions to LiteLLM! Whether you're fixing bugs, adding features, or improving documentation, we appreciate your help.

Quick Start for Contributors

This requires uv to be installed.

git clone https://github.com/BerriAI/litellm.git
cd litellm
make install-dev    # Install development dependencies
make format         # Format your code
make lint           # Run all linting checks
make test-unit      # Run unit tests
make format-check   # Check formatting only

For detailed contributing guidelines, see CONTRIBUTING.md.

📖 Contributing to documentation? The LiteLLM docs have moved to a separate repository: BerriAI/litellm-docs. Please open doc PRs there. Docs are served at docs.litellm.ai.

Code Quality / Linting

LiteLLM follows the Google Python Style Guide.

Our automated checks include:

  • Ruff for formatting, linting, and code quality
  • basedpyright for type checking
  • Circular import detection
  • Import safety checks

All these checks must pass before your PR can be merged.

Support / talk with founders

Contributors