Registry / web-framework / flask-openapi3-scalar

flask-openapi3-scalar

library1.44.15pypypiunverified

Provides Scalar UI integration for flask-openapi3, allowing OpenAPI documentation to be rendered with Scalar's modern UI. Current version: 1.44.15. Release cadence: frequent updates.

web-framework

pip install flask-openapi3-scalar

github ↗package ↗docs ↗

INSTALL

IMPORT

SIG · FLASK-OPENAPI3-SCA

flask-openapi3-scalar

web-frameworkpythonv1.44.15

Install

4.0s avg

Import

—

Disk

35MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v1.44.15 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.000s · 36.4MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 4.0s · import 0.000s · 36MB

35MB installed

● package 35MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

ScalarUI

✓ from flask_openapi3_scalar import ScalarUI

✗ from flask_openapi3_scalar import ScalarUI

Quickstart: create a Flask app with OpenAPI and register ScalarUI to serve interactive documentation at /scalar.

from flask import Flask from flask_openapi3 import OpenAPI from flask_openapi3_scalar import ScalarUI app = Flask(__name__) api = OpenAPI(app) spec = api.get_spec() ScalarUI(spec, url_prefix='/scalar').register(app) @app.route('/') def home(): return 'Hello, World!' if __name__ == '__main__': app.run()

Debug

Known issues

breakingThe package was originally named 'flask-openapi3-scalar' but the import path may change. Ensure you use the correct module name 'flask_openapi3_scalar' (underscores).

fix

Use 'from flask_openapi3_scalar import ScalarUI' instead of hyphens.

affects: all

gotchaThe OpenAPI spec must be passed to ScalarUI. If you don't pass the spec, it may fail silently or show an empty UI.

fix

Always pass the spec object: ScalarUI(spec, ...) where spec is obtained from api.get_spec().

affects: all

deprecatedThe 'url_prefix' parameter may be renamed or deprecated in future versions. Check changelog.

fix

Use the current parameter name as per documentation; if deprecated, use the new name.

affects: <=1.44.15

Upgrade

Version history

1.44.15latest on PyPI · released Feb 7, 2026

Audit

Dependencies

flask-openapi3requiredCore dependency for OpenAPI specification generation

Agent activity

7 hits · last 30 days

node

Amazon

Resources

githubhttps://github.com/luolingchun/flask-openapi3-plugins ↗

packagehttps://pypi.org/project/flask-openapi3-scalar/ ↗

docshttps://luolingchun.github.io/flask-openapi3/latest/Usage/UI_Templates/ ↗