modern-python/httpware: Python HTTP client framework with sync & async clients and built-in resilience · GitHub

Typed, resilient HTTP clients for Python — typed errors, typed response bodies, and composable resilience (retry, bulkhead, circuit breaker), sync or async.

• Errors you can catch by name — a 404 raises NotFoundError, a 429 RateLimitedError, automatically; everything else bubbles up under one httpware.StatusError base. No raise_for_status(), no status-code branching.
• Typed response bodies — response_model=User decodes the body straight to your pydantic or msgspec type; a missing decoder fails fast, before the request goes out.
• Composable resilience — retry + retry-budget, bulkhead, circuit breaker, and timeout as middleware over standard httpx2.

Built on httpx2: httpware re-exports httpx2.Request/httpx2.Response and stays a thin wrapper, not a new HTTP abstraction.

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

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 routes to pydantic, Struct to msgspec
pip install httpware[all]           # everything (pydantic, msgspec, otel)

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 is identical — swap AsyncClient → Client and drop the await / async with. A 4xx/5xx response raises a typed StatusError; a malformed body raises DecodeError. Both subclass httpware.ClientError.

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

• Quickstart & observability — resilience middleware, streaming, and the stable logger/event contract.
• Middleware — write your own (auth, tracing, request-ID propagation).
• Resilience — retry + retry-budget, bulkhead, circuit breaker, timeout.
• Errors — the exception tree and catching strategies.
• Testing — httpx2.MockTransport injection.
• Recipes — DI wiring, phase-decorator patterns, link-header pagination.

Browse the full list of templates and libraries in modern-python — see the org profile for the categorized index.