PyPI Package Metadata Lookup (Version, Dependencies, License, Release History)

{
  "type": "object",
  "required": [
    "package"
  ],
  "properties": {
    "package": {
      "type": "string",
      "description": "The exact PyPI package (project) name, e.g. 'requests'."
    }
  },
  "additionalProperties": false
}

{
  "type": "object",
  "properties": {
    "code": {
      "type": "string",
      "description": "Present instead of the package fields above when the request errors -- observed as 'HTTP_400' for a package name with no matching PyPI project."
    },
    "name": {
      "type": "string",
      "description": "The package name, echoed back."
    },
    "author": {
      "type": "string",
      "description": "The package's declared author, as published in its own PyPI metadata -- typically 'Name <email>', though an alternate or empty format is possible."
    },
    "license": {
      "type": "string",
      "description": "Declared license, e.g. 'Apache Software License'."
    },
    "message": {
      "type": "string",
      "description": "Human-readable error message accompanying `code`."
    },
    "summary": {
      "type": "string",
      "description": "One-line package summary."
    },
    "version": {
      "type": "string",
      "description": "The current/latest published version."
    },
    "keywords": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Package keywords/tags. Often empty -- presumably a list of strings when a package declares any; item shape when populated is not documented."
    },
    "dependencies": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Declared dependency specifiers, as raw PEP 508 strings including any extras/markers."
    },
    "total_releases": {
      "type": "number",
      "description": "Total number of releases ever published for this package."
    },
    "python_versions": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Flattened list of Python-related trove classifiers observed on the package (specific version numbers mixed with implementation/status tags like 'CPython', 'PyPy', '2 - Beta') -- not a clean list of only version numbers."
    },
    "recent_releases": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "version": {
            "type": "string"
          },
          "upload_date": {
            "type": "string",
            "description": "ISO-8601 UTC timestamp."
          },
          "python_requires": {
            "type": [
              "string",
              "null"
            ],
            "description": "Per-release Python constraint. Observed null on every entry seen so far."
          }
        },
        "additionalProperties": true
      },
      "description": "Ten releases with upload dates, newest-first within the slice. For requests, these were early releases (2015-2016), not the package's newest."
    },
    "requires_python": {
      "type": "string",
      "description": "Declared Python version constraint, e.g. '>=3.10'."
    },
    "description_content_type": {
      "type": "string",
      "description": "MIME type of the package's long description, e.g. 'text/markdown'."
    }
  },
  "description": "A package's metadata record on a successful lookup, or an error code/message when the requested package name does not exist on PyPI.",
  "additionalProperties": true
}