Flask

aid: flask
name: Flask
description: Flask is a lightweight WSGI web application framework for Python, designed to make getting started quick and
  easy with the ability to scale up to complex applications. It provides a simple core with Jinja2 templating and Werkzeug
  WSGI toolkit, and is extensible through a rich ecosystem of extensions for database integration, form validation, authentication,
  and more. Flask is a popular foundation for building APIs and web services in Python.
type: Index
deliveryModel:
  model: self-hosted
  license: BSD-3-Clause
  license_evidence:
    repo: pallets/flask
    spdx: BSD-3-Clause
    stars: 74777
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: medium
  source:
  - repository-license
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/flask.png
access: Open Source
position: Producing
x-docs-platform: readthedocs
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-03
tags:
- Framework
- Microframework
- pallets
- Python
- Web Framework
- WSGI
tags_raw:
- Frameworks
- Lightweight
- Microframework
- Pallets
- Python
- Web Framework
- WSGI
url: https://raw.githubusercontent.com/api-evangelist/flask/refs/heads/main/apis.yml
created: '2026-03-26'
modified: '2026-04-28'
specificationVersion: '0.23'
apis:
- aid: flask:flask
  name: Flask
  description: Flask is a lightweight WSGI web application framework for Python. It is commonly used as a foundation for building
    HTTP APIs and web services. While Flask itself does not expose an HTTP API, it ships with a configurable runtime whose
    configuration surface is captured here as a JSON Schema for tooling and validation purposes.
  humanURL: https://flask.palletsprojects.com/
  tags:
  - Framework
  - Microframework
  - pallets
  - Python
  - Web Framework
  - WSGI
  tags_raw:
  - Frameworks
  - Lightweight
  - Microframework
  - Pallets
  - Python
  - Web Framework
  - WSGI
  properties:
  - type: Documentation
    url: https://flask.palletsprojects.com/en/stable/
  - type: GettingStarted
    url: https://flask.palletsprojects.com/en/stable/quickstart/
  - type: SourceCode
    url: https://github.com/pallets/flask
  - type: JSONSchema
    url: json-schema/flask-config.json
common:
- type: Plans
  url: plans/flask-plans-pricing.yml
- type: RateLimits
  url: rate-limits/flask-rate-limits.yml
- type: FinOps
  url: finops/flask-finops.yml
- type: IssueTracker
  url: https://github.com/pallets/flask/issues
- type: Releases
  url: https://github.com/pallets/flask/releases
- type: CodeOfConduct
  url: https://github.com/pallets/.github/blob/main/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/pallets/flask/blob/main/docs/contributing.rst
- type: DomainSecurity
  url: security/flask-domain-security.yml
- type: Website
  url: https://flask.palletsprojects.com/
- type: Documentation
  url: https://flask.palletsprojects.com/en/stable/
- type: GettingStarted
  url: https://flask.palletsprojects.com/en/stable/quickstart/
- type: GitHubOrganization
  url: https://github.com/pallets
- type: SourceCode
  url: https://github.com/pallets/flask
- type: Blog
  url: https://palletsprojects.com/blog/
- type: PyPI
  url: https://pypi.org/project/flask/
- type: Extensions
  url: https://flask.palletsprojects.com/en/stable/extensions/
- type: ChangeLog
  url: https://flask.palletsprojects.com/en/stable/changes/
- type: License
  url: https://github.com/pallets/flask/blob/main/LICENSE.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com