Typed, resilient HTTP clients for Python, sync and async.

Why httpware

• A 4xx or 5xx response raises an exception named after its status, such as NotFoundError for 404 or RateLimitedError for 429. All of them subclass httpware.StatusError, so you never call raise_for_status().
• response_model=User decodes the body into your pydantic or msgspec type. If no installed decoder handles the type, the call fails before the request is sent.
• Retry with a retry budget, bulkhead, circuit breaker, and timeout ship as middleware you compose per client.

httpware is a thin layer over httpx2: requests and responses are plain httpx2.Request and httpx2.Response objects.

Status: Pre-1.0. Public API is subject to change between minor releases until v1.0.

Install

pip install httpware                     # core only, no decoder
pip install httpware[pydantic]           # PydanticDecoder: BaseModel, dataclasses, primitives, generics
pip install httpware[msgspec]            # MsgspecDecoder: Struct, dataclasses, primitives, generics
pip install httpware[pydantic,msgspec]   # both; BaseModel goes to pydantic, Struct to msgspec
pip install httpware[otel]               # OpenTelemetry span events
pip install httpware[all]                # pydantic, msgspec, and otel

Quickstart

A typed GET against a live API (needs pip install httpware[pydantic]):

import asyncio

from httpware import AsyncClient
from pydantic import BaseModel


class User(BaseModel):
    id: int
    name: str


async def main() -> None:
    async with AsyncClient(base_url="https://jsonplaceholder.typicode.com") as client:
        user = await client.get("/users/1", response_model=User)
        print(user.name)  # Leanne Graham


asyncio.run(main())

The sync Client works the same way: use Client instead of AsyncClient, and drop await and async with. A 4xx/5xx response raises a typed StatusError; a malformed body raises DecodeError. Both subclass httpware.ClientError.

Documentation

Full guides live at httpware.modern-python.org:

• Quickstart: first requests, client options, streaming.
• Resilience: retry and retry budget, bulkhead, circuit breaker, timeout.
• Errors: the exception tree and how to catch it.
• Decoders: typed response bodies and custom decoders.
• Middleware: writing your own (auth, tracing, request IDs).
• Observability: logger and event names, OpenTelemetry wiring.
• Testing: injecting httpx2.MockTransport.
• Recipes: DI wiring, phase decorators, Link header pagination.

🗒️ Release notes · 📦 PyPI · 📝 License

Part of modern-python

Browse the full list of templates and libraries in modern-python; the org profile has the categorized index.