feat: add asyncio support with HTTPX

HISTORY.md

@@ -1,6 +1,18 @@
 Release History
 ===============
 
+Unreleased
+----------
+
+- Added `serpapi.AsyncClient` with async search, archive, account, locations,
+  image upload, and pagination support.
+- Migrated the synchronous HTTP transport from Requests to HTTPX while keeping
+  the existing `serpapi.Client` API and request-option compatibility.
+- Added explicit sync and async client lifecycle management, deterministic
+  concurrency tests, asyncio documentation, and a local HTTP benchmark.
+- Updated the minimum supported Python version to 3.8 to match the SDK's CI
+  matrix and HTTPX requirements.
+
 1.1.2 (2026-09-15)
 ------------------
 

MANIFEST.in

@@ -2,6 +2,7 @@ include README.md CONTRIBUTING.md HISTORY.md LICENSE
 include .readthedocs.yaml
 include scripts/check_docs_revision.py scripts/publish_docs.py
 recursive-include tests *.py
+recursive-include benchmarks *.py *.md
 recursive-include docs *.py *.md *.txt *.css Makefile
 include assets/serpapi-logo.svg assets/serpapi-icon.png
 prune docs/_build

README.md

@@ -9,12 +9,18 @@ Query a vast range of data at scale, including web search results, flight schedu
 
 ## Installation
 
-To install the `serpapi` package, simply run the following command:
+Install the `serpapi` package with pip or add it to a uv project:
 
 ```bash
-$ pip install serpapi
+pip3 install serpapi
 ```
 
+```bash
+uv add serpapi
+```
+
+Python 3.8 or newer is required.
+
 Please note that this package is separate from the legacy `serpapi` module, which is available on PyPi as `google-search-results`. This package is maintained by SerpApi, and is the recommended way to access the SerpApi service from Python.
 
 ## Simple Usage
@@ -36,6 +42,37 @@ print(results)
 
 The `results` variable now contains a `SerpResults` object, which acts just like a standard dictionary, with some convenient functions added on top.
 
+## Async Usage
+
+Use `AsyncClient` in applications built on `asyncio`. Reuse one client so its
+connection pool can serve all concurrent requests:
+
+```python
+import asyncio
+import os
+
+import serpapi
+
+
+async def main():
+    async with serpapi.AsyncClient(
+        api_key=os.environ["SERPAPI_KEY"]
+    ) as client:
+        results = await asyncio.gather(
+            client.search(engine="google", q="coffee"),
+            client.search(engine="google", q="tea"),
+            client.search(engine="google", q="pizza"),
+        )
+        print([result["search_metadata"]["id"] for result in results])
+
+
+asyncio.run(main())
+```
+
+The synchronous `Client` and module-level helpers remain available. See the
+[Asyncio Client guide](https://serpapi-python.readthedocs.io/en/latest/user_guide/asyncio.html)
+for lifecycle, pagination, error-handling, and upload examples.
+
 This example runs a search for "coffee" on Google. It then returns the results as a regular Python Hash.
  See the [playground](https://serpapi.com/playground) to generate your own code.
 

benchmarks/README.md

@@ -0,0 +1,35 @@
+# HTTP client benchmark
+
+This benchmark compares the previous `requests.Session` transport, the
+synchronous HTTPX-backed `serpapi.Client`, and concurrent
+`serpapi.AsyncClient` calls.
+
+It runs against a local threaded server with a configurable response delay, so
+it does not need an API key, consume searches, or mix client behavior with
+internet and SerpApi server variance.
+
+From the repository root, run:
+
+```bash
+uv run --with requests python benchmarks/http_clients.py
+```
+
+Or install the development package and benchmark-only dependency with pip:
+
+```bash
+pip3 install -e . requests
+python benchmarks/http_clients.py
+```
+
+Each result is the median of three runs and includes the observed range. Client
+construction and shutdown are excluded consistently. Change the workload with
+`--count`, `--delay`, and `--repeats`. For example:
+
+```bash
+uv run --with requests python benchmarks/http_clients.py --count 50 --delay 0.1 --repeats 5
+```
+
+The sequential `requests` and HTTPX results show transport overhead under the
+same workload. The async result demonstrates throughput when independent
+I/O-bound calls overlap; it does not claim that one SerpApi search becomes
+faster.

benchmarks/http_clients.py

@@ -0,0 +1,128 @@
+"""Compare sequential requests with concurrent SerpApi AsyncClient calls.
+
+The benchmark uses a local delayed HTTP server. It measures client-side
+concurrency without consuming SerpApi searches or introducing internet and API
+server variance.
+"""
+
+import argparse
+import asyncio
+import json
+import statistics
+import threading
+import time
+from contextlib import contextmanager
+from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
+
+import requests
+
+import serpapi
+
+
+class DelayedJSONHandler(BaseHTTPRequestHandler):
+    delay = 0.05
+
+    def do_GET(self):
+        time.sleep(self.delay)
+        payload = json.dumps({"search_metadata": {"status": "Success"}}).encode()
+        self.send_response(200)
+        self.send_header("Content-Type", "application/json")
+        self.send_header("Content-Length", str(len(payload)))
+        self.end_headers()
+        self.wfile.write(payload)
+
+    def log_message(self, format, *args):
+        pass
+
+
+@contextmanager
+def delayed_server(delay):
+    DelayedJSONHandler.delay = delay
+    server = ThreadingHTTPServer(("127.0.0.1", 0), DelayedJSONHandler)
+    thread = threading.Thread(target=server.serve_forever, daemon=True)
+    thread.start()
+    try:
+        host, port = server.server_address
+        yield f"http://{host}:{port}"
+    finally:
+        server.shutdown()
+        server.server_close()
+        thread.join()
+
+
+def measure_requests(base_url, count):
+    session = requests.Session()
+    session.trust_env = False
+    try:
+        started = time.perf_counter()
+        for _ in range(count):
+            response = session.get(f"{base_url}/search", timeout=10)
+            response.raise_for_status()
+        return time.perf_counter() - started
+    finally:
+        session.close()
+
+
+def measure_sync_client(base_url, count):
+    client = serpapi.Client(trust_env=False, timeout=10)
+    client.BASE_DOMAIN = base_url
+    try:
+        started = time.perf_counter()
+        for index in range(count):
+            client.search(q=f"query-{index}")
+        return time.perf_counter() - started
+    finally:
+        client.close()
+
+
+async def measure_async_client(base_url, count):
+    client = serpapi.AsyncClient(trust_env=False, timeout=10)
+    async with client:
+        client.BASE_DOMAIN = base_url
+        started = time.perf_counter()
+        await asyncio.gather(
+            *(client.search(q=f"query-{index}") for index in range(count))
+        )
+        return time.perf_counter() - started
+
+
+def summarize(label, timings):
+    median = statistics.median(timings)
+    spread = f"{min(timings):.3f}-{max(timings):.3f}s"
+    print(f"{label:<29} {median:.3f}s median ({spread})")
+    return median
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--count", type=int, default=20)
+    parser.add_argument("--delay", type=float, default=0.05)
+    parser.add_argument("--repeats", type=int, default=3)
+    args = parser.parse_args()
+    if args.count < 1:
+        parser.error("--count must be at least 1")
+    if args.delay < 0:
+        parser.error("--delay must not be negative")
+    if args.repeats < 1:
+        parser.error("--repeats must be at least 1")
+
+    with delayed_server(args.delay) as base_url:
+        requests_timings = [
+            measure_requests(base_url, args.count) for _ in range(args.repeats)
+        ]
+        sync_timings = [
+            measure_sync_client(base_url, args.count) for _ in range(args.repeats)
+        ]
+        async_timings = [
+            asyncio.run(measure_async_client(base_url, args.count))
+            for _ in range(args.repeats)
+        ]
+
+    summarize("requests.Session sequential:", requests_timings)
+    sync_median = summarize("serpapi.Client sequential:", sync_timings)
+    async_median = summarize("AsyncClient concurrent:", async_timings)
+    print(f"async vs sync speedup:       {sync_median / async_median:.2f}x")
+
+
+if __name__ == "__main__":
+    main()

docs/index.md

@@ -20,7 +20,7 @@ Run one of these commands in your terminal. Use `pip` to install into your Pytho
 :::{tab-item} pip
 
 ```bash
-pip install serpapi
+pip3 install serpapi
 ```
 
 :::
@@ -35,7 +35,7 @@ uv add serpapi
 
 ::::
 
-The package requires Python 3.6 or newer.
+The package requires Python 3.8 or newer.
 
 ## First Request
 
@@ -92,7 +92,7 @@ Use the same search parameter names as the [SerpApi API documentation](https://s
 - [Output Formats](user_guide/output-formats.md) explains when to use JSON, Markdown, or HTML.
 - [Migration Guide](user_guide/migrating-from-google-search-results.md) shows how to replace `google-search-results` with this package.
 - [Parameters and Engines](user_guide/parameters-and-engines.md) explains search parameters and how to test them in the [SerpApi Playground](https://serpapi.com/playground).
-- For scripts that collect results, see [pagination](user_guide/pagination.md), [timeouts and errors](user_guide/errors-and-timeouts.md), [request options](user_guide/request-options.md), and [account and locations](user_guide/account-and-locations.md).
+- For concurrent applications and scripts that collect results, see the [Asyncio Client](user_guide/asyncio.md), [pagination](user_guide/pagination.md), [timeouts and errors](user_guide/errors-and-timeouts.md), [request options](user_guide/request-options.md), and [account and locations](user_guide/account-and-locations.md).
 - For searches you retrieve later, selected response fields, and data retention settings, see [Async Search Archive](user_guide/async-search-archive.md), [JSON Restrictor](user_guide/json-restrictor.md), and [Zero Trace](user_guide/zero-trace.md).
 - [Examples](examples/index.md) includes searches for web pages, AI answers, local businesses, products, travel, finance, trends, jobs, media, apps, and research.
 
@@ -132,6 +132,7 @@ user_guide/migrating-from-google-search-results
 :caption: Advanced Usage
 
 user_guide/async-search-archive
+user_guide/asyncio
 user_guide/threading
 user_guide/multiprocessing
 user_guide/zero-trace

docs/user_guide/asyncio.md

@@ -0,0 +1,108 @@
+---
+title: "Asyncio Client"
+description: "Run concurrent SerpApi requests with AsyncClient and asyncio."
+---
+
+# Asyncio Client
+
+`serpapi.AsyncClient` provides non-blocking versions of the SDK methods for
+applications that use Python's `asyncio` event loop. This is separate from the
+[Async Search Archive](async-search-archive.md), which is a SerpApi API feature
+for retrieving a search after the server finishes processing it.
+
+## Create and Close a Client
+
+Use an async context manager so the connection pool is always closed:
+
+```python
+import asyncio
+import os
+
+import serpapi
+
+
+async def main():
+    async with serpapi.AsyncClient(
+        api_key=os.environ["SERPAPI_KEY"],
+        timeout=20,
+    ) as client:
+        results = await client.search(engine="google", q="coffee")
+        print(results["search_metadata"]["id"])
+
+
+asyncio.run(main())
+```
+
+When a context manager does not fit the application lifecycle, call
+`await client.aclose()` during shutdown. Create one client per event loop and
+reuse it instead of constructing a client for every request.
+
+## Run Independent Searches Concurrently
+
+`asyncio.gather()` lets other requests make progress while one request waits
+for network I/O:
+
+```python
+async def search_many(client):
+    return await asyncio.gather(
+        client.search(engine="google", q="coffee"),
+        client.search(engine="google", q="tea"),
+        client.search(engine="google", q="pizza"),
+    )
+```
+
+Concurrency improves throughput for independent I/O-bound requests. It does
+not make one search finish faster, and each call still consumes a search from
+the account.
+
+## Other Async Methods
+
+The async client supports the same endpoint parameters and response formats as
+the synchronous client:
+
+```python
+async def inspect_account(client):
+    account = await client.account()
+    locations = await client.locations(q="Austin", limit=3)
+    archived = await client.search_archive(search_id="search-id")
+    upload = await client.upload_image("image.png")
+    return account, locations, archived, upload
+```
+
+The example above is an illustrative fragment and assumes it runs inside the
+same async function and client context as the first example.
+
+## Async Pagination
+
+JSON search responses are `AsyncSerpResults` objects. Fetch one more page with
+`await`, or iterate through several pages with `async for`:
+
+```python
+async def read_pages(results):
+    next_page = await results.next_page()
+
+    async for page in results.yield_pages(max_pages=5):
+        for item in page.get("organic_results", []):
+            print(item.get("title"))
+
+    return next_page
+```
+
+## Error Handling
+
+Async methods raise the same SerpApi exceptions as synchronous methods:
+
+```python
+async def safe_search(client):
+    try:
+        return await client.search(engine="google", q="coffee")
+    except serpapi.TimeoutError:
+        print("The request timed out.")
+    except serpapi.HTTPConnectionError:
+        print("Could not connect to SerpApi.")
+    except serpapi.HTTPError as exc:
+        print(exc.status_code, exc.error)
+```
+
+See [Errors and Timeouts](errors-and-timeouts.md) and
+[Request Options](request-options.md) for shared configuration details.