FastAPI FullAuth

Production-grade, async-native authentication and authorization for FastAPI.

Documentation: https://mdfarhankc.github.io/fastapi-fullauth
Source Code: https://github.com/mdfarhankc/fastapi-fullauth

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A complete, async-native authentication and authorization system for FastAPI - production-ready and pluggable. JWT access/refresh tokens with rotation, Argon2 password hashing, email verification, OAuth2 social login, passkeys, session management, and role-based access control, all out of the box. Bring your own database with the SQLModel or SQLAlchemy adapter, and opt into only the features you need.

Features

• JWT access + refresh tokens with configurable expiry
• Refresh token rotation with reuse detection; revokes entire session family on replay
• Session management: list active sessions (device, IP, last used), revoke one device, or sign out everywhere else
• Password hashing via Argon2id (default) or bcrypt, with transparent rehashing
• Email verification and password reset flows with event hooks
• Passkey (WebAuthn): passwordless login with fingerprint, Face ID, security keys
• OAuth2 social login: Google and GitHub, with multi-redirect-URI support
• Role-based access control: current_user, require_role(), require_permission()
• Rate limiting: per-route auth limits + global middleware (memory or Redis)
• CSRF protection and security headers middleware
• Bearer or cookie transport: opt into HttpOnly cookies that carry both access and refresh tokens, out of JavaScript's reach; bearer is the default
• Pluggable adapters: SQLModel, SQLAlchemy, or write your own for any data store
• Generic type parameters: define your own schemas with full IDE support and type safety
• Composable routers: include only the route groups you need
• Event hooks: after_register, after_login, send_verification_email, etc.
• Custom JWT claims: embed app-specific data in tokens
• Structured logging: all auth events, security violations, and failures logged
• Redis support: token blacklist and rate limiter backends
• Python 3.10 - 3.14 supported

Installation

The fastest way to start: one adapter plus every optional feature in a single extra.

# Recommended: SQLModel adapter + Redis, OAuth, passkeys, bcrypt
pip install "fastapi-fullauth[sqlmodel-standard]"

# Same, on the SQLAlchemy adapter
pip install "fastapi-fullauth[sqlalchemy-standard]"

Or stay minimal and add only what you use:

# Core + one ORM adapter (pick one)
pip install "fastapi-fullauth[sqlmodel]"

# Mix and match any extras
pip install "fastapi-fullauth[sqlalchemy,oauth,redis]"

Extra	Adds
sqlmodel / sqlalchemy	ORM adapter + Alembic (pick one)
redis	Redis backends for token blacklist, lockout, rate limiting, passkey challenges
oauth	OAuth2 social login (Google, GitHub)
passkey	Passkey / WebAuthn support
bcrypt	bcrypt password hashing (Argon2id is the default and needs no extra)
sqlmodel-standard / sqlalchemy-standard	One adapter plus all of the above

Quotes around the package spec keep shells like zsh from globbing the [extras].

Quick start

from fastapi import FastAPI
from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
from sqlmodel import Relationship

from fastapi_fullauth import FullAuth, FullAuthConfig
from fastapi_fullauth.adapters import SQLModelAdapter
from fastapi_fullauth.models.sqlmodel import RefreshTokenMixin, UserMixin


class RefreshToken(RefreshTokenMixin, table=True):
    pass


class User(UserMixin, table=True):
    refresh_tokens: list[RefreshToken] = Relationship()


engine = create_async_engine("sqlite+aiosqlite:///./app.db")
session_maker = async_sessionmaker(engine, expire_on_commit=False)

app = FastAPI()
fullauth = FullAuth(
    adapter=SQLModelAdapter(
        session_maker=session_maker,
        user_model=User,
        refresh_token_model=RefreshToken,
    ),
    config=FullAuthConfig(SECRET_KEY="your-secret-key"),
)
fullauth.init_app(app)

That's it; all auth routes are registered under /api/v1/auth/ automatically. Create the tables with Alembic (see the migrations guide) or SQLModel.metadata.create_all for a quick local start.

The SQLite quick-start needs an async driver: pip install aiosqlite.

Omit config in dev and a random secret key is generated (tokens won't survive restarts).

Composable routers

Opt in to a subset of routers:

fullauth.init_app(app, include_routers=["auth", "profile"])

include_routers=None (default) registers every available router. Or wire routers manually for full control:

app = FastAPI()
fullauth.bind(app)  # required for dependencies to work

app.include_router(fullauth.auth_router, prefix="/api/v1/auth")
app.include_router(fullauth.profile_router, prefix="/api/v1/auth")

Router	Routes
auth_router	register, login, logout, refresh
profile_router	me, verified-me, update profile, delete account, change password
verify_router	email verification, password reset
admin_router	assign/remove roles and permissions (superuser)
oauth_router	OAuth provider routes (only if configured)
passkey_router	Passkey register, authenticate, list, delete (only if enabled)
sessions_router	list active sessions, revoke one device, sign out others

Middleware

init_app() does not wire any middleware automatically. Import what you want and add it yourself:

from fastapi_fullauth.middleware import (
    SecurityHeadersMiddleware,
    CSRFMiddleware,
    RateLimitMiddleware,
)

app.add_middleware(SecurityHeadersMiddleware)
app.add_middleware(CSRFMiddleware, secret=fullauth.config.SECRET_KEY)
app.add_middleware(RateLimitMiddleware, max_requests=60, window_seconds=60)

Token transport

By default, tokens are returned in the response body for Authorization: Bearer use. Opt into cookie transport to carry both the access and refresh tokens in separate HttpOnly cookies, out of JavaScript's reach:

from fastapi_fullauth.backends import CookieBackend

fullauth = FullAuth(
    adapter=adapter,
    config=config,
    backends=[CookieBackend(config)],
)

/refresh and /logout then read the tokens from the cookies, so the browser never stores them. Wire CSRFMiddleware whenever you use cookie transport.

Routes

Method	Path	Description
POST	/auth/register	Create a new user
POST	/auth/login	Authenticate, get tokens
POST	/auth/logout	Blacklist token
POST	/auth/refresh	Rotate token pair
GET	/auth/sessions	List active sessions
DELETE	/auth/sessions/{family_id}	Revoke one session
POST	/auth/sessions/revoke-others	Sign out other sessions
GET	/auth/me	Get current user
GET	/auth/me/verified	Verified users only
PATCH	/auth/me	Update profile
DELETE	/auth/me	Delete account
POST	/auth/change-password	Change password
POST	/auth/verify-email/request	Request verification email
POST	/auth/verify-email/confirm	Confirm email
POST	/auth/password-reset/request	Request password reset
POST	/auth/password-reset/confirm	Reset password
POST	/auth/admin/assign-role	Assign role (superuser)
POST	/auth/admin/remove-role	Remove role (superuser)
POST	/auth/admin/assign-permission	Assign permission to role (superuser)
POST	/auth/admin/remove-permission	Remove permission from role (superuser)
GET	/auth/admin/role-permissions/{role_name}	List role's permissions (superuser)

With OAuth enabled, additional routes are registered under /auth/oauth/. All routes are prefixed with /api/v1 by default.

Custom user schemas

Combine each mixin with table=True (or your DeclarativeBase for the SQLAlchemy adapter), then pass everything to the adapter:

from sqlmodel import Field, Relationship
from fastapi_fullauth import FullAuth, FullAuthConfig, UserSchema, CreateUserSchema
from fastapi_fullauth.adapters import SQLModelAdapter
from fastapi_fullauth.models.sqlmodel import (
    RefreshTokenMixin, RoleMixin, UserMixin, UserRoleMixin,
)


class RefreshToken(RefreshTokenMixin, table=True): pass
class Role(RoleMixin, table=True): pass
class UserRole(UserRoleMixin, table=True): pass


class User(UserMixin, table=True):
    display_name: str = Field(default="", max_length=100)
    phone: str = Field(default="", max_length=20)
    roles: list[Role] = Relationship(link_model=UserRole)
    refresh_tokens: list[RefreshToken] = Relationship()


class MyUserSchema(UserSchema):
    display_name: str = ""
    phone: str = ""


class MyCreateSchema(CreateUserSchema):
    display_name: str = ""


fullauth = FullAuth(
    adapter=SQLModelAdapter(
        session_maker,
        user_model=User,
        refresh_token_model=RefreshToken,
        role_model=Role,
        user_role_model=UserRole,
        user_schema=MyUserSchema,
        create_user_schema=MyCreateSchema,
    ),
    config=FullAuthConfig(SECRET_KEY="..."),
)

Full IDE autocompletion and type checking on custom fields:

from typing import Annotated
from fastapi import Depends
from fastapi_fullauth.dependencies import current_user, current_active_verified_user

CurrentUser = Annotated[MyUserSchema, Depends(current_user)]
VerifiedUser = Annotated[MyUserSchema, Depends(current_active_verified_user)]

@app.get("/profile")
async def profile(user: CurrentUser):
    return {"name": user.display_name}  # IDE knows this field exists

Protected routes

from typing import Annotated
from fastapi import Depends
from fastapi_fullauth.dependencies import current_user, current_active_verified_user, current_superuser, require_role

CurrentUser = Annotated[UserSchema, Depends(current_user)]
VerifiedUser = Annotated[UserSchema, Depends(current_active_verified_user)]
SuperUser = Annotated[UserSchema, Depends(current_superuser)]

@app.get("/profile")
async def profile(user: CurrentUser):
    return user

@app.get("/dashboard")
async def dashboard(user: VerifiedUser):
    return {"email": user.email}

@app.delete("/admin/users/{id}")
async def delete_user(user: SuperUser):
    ...

@app.get("/editor")
async def editor_panel(user=Depends(require_role("editor"))):
    ...

OAuth2 social login

from fastapi_fullauth import FullAuth, FullAuthConfig
from fastapi_fullauth.oauth.google import GoogleOAuthProvider
from fastapi_fullauth.oauth.github import GitHubOAuthProvider

fullauth = FullAuth(
    adapter=adapter,
    config=FullAuthConfig(SECRET_KEY="..."),
    providers=[
        GoogleOAuthProvider(
            client_id="your-google-client-id",
            client_secret="your-google-secret",
            redirect_uris=[
                "http://localhost:3000/auth/callback",
                "https://myapp.com/auth/callback",
            ],
        ),
        GitHubOAuthProvider(
            client_id="your-github-client-id",
            client_secret="your-github-secret",
            redirect_uris=["http://localhost:3000/auth/callback"],
        ),
    ],
)

Requires httpx: pip install "fastapi-fullauth[oauth]"

Security note: the OAuth state token is signed and carries the PKCE challenge, but it is not bound to the browser session. For defense against login-CSRF, also bind state to the initiating browser (e.g. a short-lived cookie you set before redirecting and verify on callback).

Event hooks

async def welcome(user):
    await send_email(user.email, "Welcome!")

async def send_verify(email, token):
    await send_email(email, f"Verify: https://myapp.com/verify?token={token}")

fullauth.hooks.on("after_register", welcome)
fullauth.hooks.on("send_verification_email", send_verify)

Events: after_register, after_login, after_logout, after_password_change, after_password_reset, after_email_verify, send_verification_email, send_password_reset_email, after_oauth_login, after_oauth_register

Configuration

Pass a FullAuthConfig object or set env vars with FULLAUTH_ prefix.

fullauth = FullAuth(
    adapter=adapter,
    config=FullAuthConfig(
        SECRET_KEY="...",
        ACCESS_TOKEN_EXPIRE_MINUTES=60,
        API_PREFIX="/api/v2",
        LOGIN_FIELD="username",
        PASSWORD_HASH_ALGORITHM="bcrypt",
        BLACKLIST_BACKEND="redis",
        REDIS_URL="redis://localhost:6379/0",
        AUTH_RATE_LIMIT_ENABLED=True,
        TRUSTED_PROXY_HEADERS=["X-Forwarded-For"],
    ),
)

See Configuration docs for all options.

AI-friendly docs

Using an AI coding assistant? Point it at our LLM-optimized docs:

• llms.txt: concise overview with links to all doc pages
• llms-full.txt: full documentation in a single file

Works with Claude, Cursor, Copilot, and any tool that accepts a docs URL.

Development

git clone https://github.com/mdfarhankc/fastapi-fullauth.git
cd fastapi-fullauth
uv sync --dev --extra sqlalchemy --extra sqlmodel
uv run pytest tests/ -v

# run examples
uv run uvicorn examples.sqlmodel_app.main:app --reload

License

MIT