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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Add a complete authentication and authorization system to your FastAPI project. FastAPI FullAuth is designed to be production-ready, async-native, and pluggable — handling JWT tokens, refresh rotation, password hashing, email verification, OAuth2 social login, and role-based access out of the box.

Features

• JWT access + refresh tokens with configurable expiry
• Refresh token rotation with reuse detection — revokes entire session family on replay
• 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 — CurrentUser, VerifiedUser, SuperUser, require_role()
• Rate limiting — per-route auth limits + global middleware (memory or Redis)
• CSRF protection and security headers middleware, auto-wired
• Pluggable adapters — SQLModel or SQLAlchemy
• 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

pip install fastapi-fullauth

# with an ORM adapter
pip install fastapi-fullauth[sqlmodel]
pip install fastapi-fullauth[sqlalchemy]

# with Redis for token blacklisting
pip install fastapi-fullauth[sqlmodel,redis]

# with OAuth2 social login
pip install fastapi-fullauth[sqlmodel,oauth]

# with passkey/WebAuthn
pip install fastapi-fullauth[sqlmodel,passkey]

# everything
pip install fastapi-fullauth[all]

Quick start

from fastapi import FastAPI
from fastapi_fullauth import FullAuth, FullAuthConfig
from fastapi_fullauth.adapters.sqlmodel import SQLModelAdapter

app = FastAPI()

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

That's it — all auth routes are registered under /api/v1/auth/ automatically.

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

Composable routers

Exclude routers you don't need:

fullauth.init_app(app, exclude_routers=["admin"])

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")
fullauth.init_middleware(app)

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)

fullauth.init_app(app) includes all of them. Use individual routers for granular control.

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/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}	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

Define your model and schemas — pass them explicitly to the adapter:

from sqlmodel import Field, Relationship
from fastapi_fullauth import FullAuth, FullAuthConfig, UserSchema, CreateUserSchema
from fastapi_fullauth.adapters.sqlmodel import SQLModelAdapter
from fastapi_fullauth.adapters.sqlmodel.models.base import UserBase, RefreshTokenRecord
from fastapi_fullauth.adapters.sqlmodel.models.role import Role, UserRoleLink

class User(UserBase, table=True):
    __tablename__ = "fullauth_users"

    display_name: str = Field(default="", max_length=100)
    phone: str = Field(default="", max_length=20)

    roles: list[Role] = Relationship(link_model=UserRoleLink)
    refresh_tokens: list[RefreshTokenRecord] = Relationship()

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

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

fullauth = FullAuth(
    adapter=SQLModelAdapter(
        session_maker,
        user_model=User,
        user_schema=MyUserSchema,
        create_user_schema=MyCreateSchema,
    ),
    config=FullAuthConfig(SECRET_KEY="..."),
)

Full IDE autocompletion and type checking on custom fields. Use get_current_user_dependency() for typed dependencies:

from typing import Annotated
from fastapi import Depends
from fastapi_fullauth.dependencies import get_current_user_dependency

MyCurrentUser = Annotated[MyUserSchema, Depends(get_current_user_dependency(MyUserSchema))]

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

Protected routes

from fastapi import Depends
from fastapi_fullauth.dependencies import CurrentUser, VerifiedUser, SuperUser, require_role

@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]

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

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