diff --git a/CHANGELOG.md b/CHANGELOG.md
index b1423fda..7ff34b8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+- Allow to write queryables [#698](https://github.com/stac-utils/pystac-client/pull/698)
+
 ### Removed
 
 - Python 3.9 support [#724](https://github.com/stac-utils/pystac-client/pull/724)
diff --git a/pystac_client/mixins.py b/pystac_client/mixins.py
index 21babd90..2d84debb 100644
--- a/pystac_client/mixins.py
+++ b/pystac_client/mixins.py
@@ -67,3 +67,16 @@ def _get_queryables_href(self) -> str:
         link = self.get_single_link(QUERYABLES_REL)
         href = self._get_href(QUERYABLES_REL, link, QUERYABLES_ENDPOINT)
         return href
+
+    def set_queryables(
+        self, queryables: Dict[str, Any], url: Optional[str] = None
+    ) -> None:
+        """Write a queryables to an endpoint.
+
+        Defaults to the queryables href as defined by the STAC API extension.
+        """
+        if self._stac_io is None:
+            raise APIError("API access is not properly configured (`_stac_io` not set)")
+        if url is None:
+            url = self._get_queryables_href()
+        self._stac_io.save_json(url, queryables)
diff --git a/tests/cassettes/test_client/test_set_queryables.yaml b/tests/cassettes/test_client/test_set_queryables.yaml
new file mode 100644
index 00000000..0f693fe1
--- /dev/null
+++ b/tests/cassettes/test_client/test_set_queryables.yaml
@@ -0,0 +1,107 @@
+interactions:
+- request:
+    body: null
+    headers:
+      Accept:
+      - '*/*'
+      Accept-Encoding:
+      - gzip, deflate
+      Connection:
+      - keep-alive
+      User-Agent:
+      - python-requests/2.31.0
+    method: GET
+    uri: https://explorer.digitalearth.africa/stac/
+  response:
+    body:
+      string: '{"type":"Catalog","id":"DEAfrica_data","stac_version":"1.0.0","description":"Configure
+        stac endpoint information in your Explorer `settings.env.py` file","links":[{"rel":"root","href":"https://explorer.digitalearth.africa/stac","type":"application/json","title":"Digital
+        Earth Africa"},{"rel":"self","href":"https://explorer.digitalearth.africa/stac","type":"application/json"},{"rel":"children","href":"https://explorer.digitalearth.africa/stac/collections","type":"application/json","title":"Collections"},{"rel":"child","href":"https://explorer.digitalearth.africa/stac/catalogs/arrivals","type":"application/json","title":"Arrivals"},{"rel":"search","href":"https://explorer.digitalearth.africa/stac/search","type":"application/json","title":"Item
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+    headers:
+      Access-Control-Allow-Origin:
+      - '*'
+      Connection:
+      - keep-alive
+      Content-Length:
+      - '11536'
+      Content-Type:
+      - application/json
+      Date:
+      - Fri, 31 May 2024 16:29:26 GMT
+      Server:
+      - gunicorn
+    status:
+      code: 200
+      message: OK
+- request:
+    body: null
+    headers:
+      Accept:
+      - '*/*'
+      Accept-Encoding:
+      - gzip, deflate
+      Connection:
+      - keep-alive
+      User-Agent:
+      - python-requests/2.31.0
+    method: GET
+    uri: https://explorer.digitalearth.africa/stac
+  response:
+    body:
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+        stac endpoint information in your Explorer `settings.env.py` file","links":[{"rel":"root","href":"https://explorer.digitalearth.africa/stac","type":"application/json","title":"Digital
+        Earth Africa"},{"rel":"self","href":"https://explorer.digitalearth.africa/stac","type":"application/json"},{"rel":"children","href":"https://explorer.digitalearth.africa/stac/collections","type":"application/json","title":"Collections"},{"rel":"child","href":"https://explorer.digitalearth.africa/stac/catalogs/arrivals","type":"application/json","title":"Arrivals"},{"rel":"search","href":"https://explorer.digitalearth.africa/stac/search","type":"application/json","title":"Item
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+        Earth Africa"}'
+    headers:
+      Access-Control-Allow-Origin:
+      - '*'
+      Connection:
+      - keep-alive
+      Content-Length:
+      - '11536'
+      Content-Type:
+      - application/json
+      Date:
+      - Fri, 31 May 2024 16:29:26 GMT
+      Server:
+      - gunicorn
+    status:
+      code: 200
+      message: OK
+- request:
+    body: null
+    headers:
+      Accept:
+      - '*/*'
+      Accept-Encoding:
+      - gzip, deflate
+      Connection:
+      - keep-alive
+      User-Agent:
+      - python-requests/2.31.0
+    method: GET
+    uri: https://explorer.digitalearth.africa/stac/queryables
+  response:
+    body:
+      string: '{"$schema":"http://json-schema.org/draft-07/schema#","$id":"https://explorer.digitalearth.africa/stac/queryables","type":"object","title":"","properties":{"id":{"title":"Item
+        ID","description":"Item identifier","$ref":"https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/item.json#/definitions/core/allOf/2/properties/id"},"collection":{"description":"Collection","$ref":"https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/item.json#/collection"},"geometry":{"description":"Geometry","$ref":"https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/item.json#/geometry"},"datetime":{"description":"Datetime","$ref":"https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/datetime.json#/properties/datetime"}},"additionalProperties":true}'
+    headers:
+      Access-Control-Allow-Origin:
+      - '*'
+      Connection:
+      - keep-alive
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+      - '754'
+      Content-Type:
+      - application/json
+      Date:
+      - Fri, 31 May 2024 16:29:26 GMT
+      Server:
+      - gunicorn
+    status:
+      code: 200
+      message: OK
+version: 1
diff --git a/tests/test_client.py b/tests/test_client.py
index 0f5a1f76..401f1de6 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -2,6 +2,7 @@
 import os.path
 import warnings
 from datetime import datetime
+from pathlib import Path
 from tempfile import TemporaryDirectory
 from typing import Any, Dict
 from urllib.parse import parse_qs, urlsplit
@@ -752,3 +753,23 @@ def test_fallback_strategy() -> None:
 
     assert (item_root := item.get_single_link("root"))
     assert item_root.href == root_href
+
+
+@pytest.mark.vcr
+def test_set_queryables(tmp_path: Path) -> None:
+    """Make sure we can write queryables."""
+
+    client = Client.open(
+        "https://explorer.digitalearth.africa/stac/",
+    )
+
+    queryables = client.get_queryables()
+
+    # Transactions are not supported in the default StacApiIO
+    with pytest.raises(APIError):
+        client.set_queryables(queryables)
+
+    # write content to a temp file
+    tmp_file = tmp_path / "queryables.json"
+    client.set_queryables(queryables, str(tmp_file))
+    assert json.loads(tmp_file.read_text()) == queryables