JSON API#

PyPI offers two JSON endpoints.

Project#

Attention

The releases key on this response should be considered deprecated, and projects should shift to using the simple API (which can be accessed as JSON via PEP 691) to get this information where possible.

In the future, the releases key may be removed from this response.

GET /pypi/<project_name>/json#

Returns metadata (info) about an individual project at the latest version, a list of all releases for that project, and project URLs. Releases include the release name, URL, and MD5 and SHA256 hash digests, and are keyed by the release version string. Metadata returned comes from the values provided at upload time and does not necessarily match the content of the uploaded files. The first uploaded data for a release is stored, subsequent uploads do not update it.

Example Request:

GET /pypi/sampleproject/json HTTP/1.1
Host: pypi.org
Accept: application/json

Example response:

HTTP/1.1 200 OK
Content-Type: application/json; charset="UTF-8"

{
    "info": {
        "author": "The Python Packaging Authority",
        "author_email": "pypa-dev@googlegroups.com",
        "bugtrack_url": "",
        "classifiers": [
            "Development Status :: 3 - Alpha",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: MIT License",
            "Programming Language :: Python :: 2",
            "Programming Language :: Python :: 2.6",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: 3.2",
            "Programming Language :: Python :: 3.3",
            "Programming Language :: Python :: 3.4",
            "Topic :: Software Development :: Build Tools"
        ],
        "description": "...",
        "description_content_type": null,
        "docs_url": null,
        "download_url": "UNKNOWN",
        "downloads": {
            "last_day": -1,
            "last_month": -1,
            "last_week": -1
        },
        "home_page": "https://github.com/pypa/sampleproject",
        "keywords": "sample setuptools development",
        "license": "MIT",
        "maintainer": null,
        "maintainer_email": null,
        "name": "sampleproject",
        "package_url": "https://pypi.org/project/sampleproject/",
        "platform": "UNKNOWN",
        "project_url": "https://pypi.org/project/sampleproject/",
        "project_urls": {
            "Download": "UNKNOWN",
            "Homepage": "https://github.com/pypa/sampleproject"
        },
        "release_url": "https://pypi.org/project/sampleproject/1.2.0/",
        "requires_dist": null,
        "requires_python": null,
        "summary": "A sample Python project",
        "version": "1.2.0",
        "yanked": false,
        "yanked_reason": null
    },
    "last_serial": 1591652,
    "releases": {
        "1.0": [],
        "1.2.0": [
            {
                "comment_text": "",
                "digests": {
                    "md5": "bab8eb22e6710eddae3c6c7ac3453bd9",
                    "sha256": "7a7a8b91086deccc54cac8d631e33f6a0e232ce5775c6be3dc44f86c2154019d"
                },
                "downloads": -1,
                "filename": "sampleproject-1.2.0-py2.py3-none-any.whl",
                "has_sig": false,
                "md5_digest": "bab8eb22e6710eddae3c6c7ac3453bd9",
                "packagetype": "bdist_wheel",
                "python_version": "2.7",
                "size": 3795,
                "upload_time_iso_8601": "2015-06-14T14:38:05.093750Z",
                "url": "https://files.pythonhosted.org/packages/30/52/547eb3719d0e872bdd6fe3ab60cef92596f95262e925e1943f68f840df88/sampleproject-1.2.0-py2.py3-none-any.whl",
                "yanked": false,
                "yanked_reason": null
            },
            {
                "comment_text": "",
                "digests": {
                    "md5": "d3bd605f932b3fb6e91f49be2d6f9479",
                    "sha256": "3427a8a5dd0c1e176da48a44efb410875b3973bd9843403a0997e4187c408dc1"
                },
                "downloads": -1,
                "filename": "sampleproject-1.2.0.tar.gz",
                "has_sig": false,
                "md5_digest": "d3bd605f932b3fb6e91f49be2d6f9479",
                "packagetype": "sdist",
                "python_version": "source",
                "size": 3148,
                "upload_time_iso_8601": "2015-06-14T14:37:56Z",
                "url": "https://files.pythonhosted.org/packages/eb/45/79be82bdeafcecb9dca474cad4003e32ef8e4a0dec6abbd4145ccb02abe1/sampleproject-1.2.0.tar.gz",
                "yanked": false,
                "yanked_reason": null
            }
        ]
    },
    "urls": [
        {
            "comment_text": "",
            "digests": {
                "md5": "bab8eb22e6710eddae3c6c7ac3453bd9",
                "sha256": "7a7a8b91086deccc54cac8d631e33f6a0e232ce5775c6be3dc44f86c2154019d"
            },
            "downloads": -1,
            "filename": "sampleproject-1.2.0-py2.py3-none-any.whl",
            "has_sig": false,
            "md5_digest": "bab8eb22e6710eddae3c6c7ac3453bd9",
            "packagetype": "bdist_wheel",
            "python_version": "2.7",
            "size": 3795,
            "upload_time_iso_8601": "2015-06-14T14:38:05.234526",
            "url": "https://files.pythonhosted.org/packages/30/52/547eb3719d0e872bdd6fe3ab60cef92596f95262e925e1943f68f840df88/sampleproject-1.2.0-py2.py3-none-any.whl",
            "yanked": false,
            "yanked_reason": null
        },
        {
            "comment_text": "",
            "digests": {
                "md5": "d3bd605f932b3fb6e91f49be2d6f9479",
                "sha256": "3427a8a5dd0c1e176da48a44efb410875b3973bd9843403a0997e4187c408dc1"
            },
            "downloads": -1,
            "filename": "sampleproject-1.2.0.tar.gz",
            "has_sig": false,
            "md5_digest": "d3bd605f932b3fb6e91f49be2d6f9479",
            "packagetype": "sdist",
            "python_version": "source",
            "size": 3148,
            "upload_time_iso_8601": "2015-06-14T14:37:56.000001Z",
            "url": "https://files.pythonhosted.org/packages/eb/45/79be82bdeafcecb9dca474cad4003e32ef8e4a0dec6abbd4145ccb02abe1/sampleproject-1.2.0.tar.gz",
            "yanked": false,
            "yanked_reason": null
        }
    ],
    "vulnerabilities": []
}
Status Codes:

On this endpoint, the vulnerabilities array provides a listing for any known vulnerabilities in the most recent release (none, for the example above). Use the release-specific endpoint documented below for precise control over this field.

Release#

Attention

Previously this response included the releases key, which had the URLs for all files for every release of this project on PyPI. Due to stability concerns, this had to be removed from the release specific page, which now ONLY serves data specific to that release.

To access all files, you should preferrably use the simple API, or otherwise use the non versioned json api at /pypi/<project_name>/json.

GET /pypi/<project_name>/<version>/json#

Returns metadata about an individual release at a specific version, otherwise identical to /pypi/<project_name>/json minus the releases key.

Example Request:

GET /pypi/sampleproject/1.2.0/json HTTP/1.1
Host: pypi.org
Accept: application/json

Example response:

HTTP/1.1 200 OK
Content-Type: application/json; charset="UTF-8"

{
    "info": {
        "author": "",
        "author_email": "",
        "bugtrack_url": "",
        "classifiers": [],
        "description": "",
        "description_content_type": null,
        "docs_url": null,
        "download_url": "",
        "downloads": {
            "last_day": -1,
            "last_month": -1,
            "last_week": -1
        },
        "home_page": "",
        "keywords": "",
        "license": "",
        "maintainer": "",
        "maintainer_email": "",
        "name": "sampleproject",
        "package_url": "https://pypi.org/project/sampleproject/",
        "platform": "",
        "project_url": "https://pypi.org/project/sampleproject/",
        "release_url": "https://pypi.org/project/sampleproject/1.0/",
        "requires_dist": null,
        "requires_python": null,
        "summary": "",
        "version": "1.2.0",
        "yanked": false,
        "yanked_reason": null
    },
    "last_serial": 1591652,
    "urls": [
        {
            "comment_text": "",
            "digests": {
                "md5": "bab8eb22e6710eddae3c6c7ac3453bd9",
                "sha256": "7a7a8b91086deccc54cac8d631e33f6a0e232ce5775c6be3dc44f86c2154019d"
            },
            "downloads": -1,
            "filename": "sampleproject-1.2.0-py2.py3-none-any.whl",
            "has_sig": false,
            "md5_digest": "bab8eb22e6710eddae3c6c7ac3453bd9",
            "packagetype": "bdist_wheel",
            "python_version": "2.7",
            "size": 3795,
            "upload_time_iso_8601": "2015-06-14T14:38:05.869374Z",
            "url": "https://files.pythonhosted.org/packages/30/52/547eb3719d0e872bdd6fe3ab60cef92596f95262e925e1943f68f840df88/sampleproject-1.2.0-py2.py3-none-any.whl",
            "yanked": false,
            "yanked_reason": null
        },
        {
            "comment_text": "",
            "digests": {
                "md5": "d3bd605f932b3fb6e91f49be2d6f9479",
                "sha256": "3427a8a5dd0c1e176da48a44efb410875b3973bd9843403a0997e4187c408dc1"
            },
            "downloads": -1,
            "filename": "sampleproject-1.2.0.tar.gz",
            "has_sig": false,
            "md5_digest": "d3bd605f932b3fb6e91f49be2d6f9479",
            "packagetype": "sdist",
            "python_version": "source",
            "size": 3148,
            "upload_time_iso_8601": "2015-06-14T14:37:56.394783Z",
            "url": "https://files.pythonhosted.org/packages/eb/45/79be82bdeafcecb9dca474cad4003e32ef8e4a0dec6abbd4145ccb02abe1/sampleproject-1.2.0.tar.gz",
            "yanked": false,
            "yanked_reason": null
        }
    ],
    "vulnerabilities": []
}
Status Codes:

Known vulnerabilities#

In the example above, the combination of the requested project and version had no known vulnerabilities. An example of a response for a project with known vulnerabilities is provided below, with unrelated fields collapsed for readability.

GET /pypi/Django/3.0.2/json HTTP/1.1
Host: pypi.org
Accept: application/json

{
    "info": {},
    "last_serial": 12089094,
    "releases": {},
    "urls": [],
    "vulnerabilities": [
        {
            "aliases": [
                "CVE-2021-3281"
            ],
            "details": "In Django 2.2 before 2.2.18, 3.0 before 3.0.12, and 3.1 before 3.1.6, the django.utils.archive.extract method (used by \"startapp --template\" and \"startproject --template\") allows directory traversal via an archive with absolute paths or relative paths with dot segments.",
            "summary": "A shorter summary of the vulnerability",
            "fixed_in": [
                "2.2.18",
                "3.0.12",
                "3.1.6"
            ],
            "id": "PYSEC-2021-9",
            "link": "https://osv.dev/vulnerability/PYSEC-2021-9",
            "source": "osv",
            "withdrawn": null
        },
    ]
}

The withdrawn field is of particular interest: when non-null, it contains the RFC 3339 timestamp when the vulnerability was withdrawn by an upstream vulnerability reporting source. API consumers can use this field to retract vulnerability reports that are later determined to be invalid.

For example, here is what a withdrawn vulnerability might look like:

{
    "aliases": [
        "CVE-2022-XXXXX"
    ],
    "details": "A long description.",
    "summary": "A shorter summary.",
    "fixed_in": [
        "1.2.3"
    ],
    "id": "PYSEC-2022-XXX",
    "link": "https://osv.dev/vulnerability/PYSEC-2022-XXX",
    "source": "osv",
    "withdrawn": "2022-06-28T16:39:06Z"
}