Pypi

Get Package

get_package

Read-onlyIdempotent

Get metadata for a Python package on PyPI (the Python Package Index). Returns the latest version, summary, author, license, project URLs, required Python version, keywords, classifiers, and the release artifact files that pip install would download. Pass the exact pip package name (e.g. "requests", "numpy").

Input Schema

TableJSON Schema

Name	Required	Description	Default
`name`	Yes	Exact PyPI package name, e.g. "requests".

Output Schema

TableJSON Schema

Name	Required	Description
`name`	Yes	Package name
`author`	Yes	Package author name
`license`	Yes	License type
`summary`	Yes	Short package description
`version`	Yes	Latest version number
`keywords`	Yes	Package keywords
`home_page`	Yes	Package homepage URL
`author_email`	Yes	Package author email
`latest_files`	Yes	Latest distribution files
`project_urls`	Yes	Additional project URLs
`recent_versions`	Yes	Last 10 available versions
`requires_python`	Yes	Python version requirement

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedJun 3, 2026

changedInput schema / properties / name / description

Previous value: -"PyPI package name"New value: +"Exact PyPI package name, e.g. \"requests\"."

Changed2 schema fields changedMay 24, 2026

addedInput schema / examples

Added value: +[
+  {
+    "name": "django"
+  },
+  {
+    "name": "pandas"
+  }
+]

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "author": {
+      "description": "Package author name",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "author_email": {
+      "description": "Package author email",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "home_page": {
+      "description": "Package homepage URL",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "keywords": {
+      "description": "Package keywords",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "latest_files": {
+      "description": "Latest distribution files",
+      "items": {
+        "properties": {
+          "filename": {
+            "description": "Distribution filename",
+            "type": "string"
+          },
+          "packagetype": {
+            "description": "Package type (e.g., sdist, bdist_wheel)",
+            "type": "string"
+          },
+          "upload_time": {
+            "description": "Upload timestamp",
+            "type": "string"
+          },
+          "url": {
+            "description": "Download URL",
+            "type": "string"
+          }
+        },
+        "required": [
+          "filename",
+          "packagetype",
+          "upload_time",
+          "url"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "license": {
+      "description": "License type",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "name": {
+      "description": "Package name",
+      "type": "string"
+    },
+    "project_urls": {
+      "description": "Additional project URLs",
+      "type": "object"
+    },
+    "recent_versions": {
+      "description": "Last 10 available versions",
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "requires_python": {
+      "description": "Python version requirement",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "summary": {
+      "description": "Short package description",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "version": {
+      "description": "Latest version number",
+      "type": "string"
+    }
+  },
+  "required": [
+    "name",
+    "version",
+    "summary",
+    "author",
+    "author_email",
+    "license",
+    "requires_python",
+    "home_page",
+    "project_urls",
+    "keywords",
+    "recent_versions",
+    "latest_files"
+  ],
+  "type": "object"
+}

Changed2 schema fields changedMay 12, 2026

removedInput schema / examples

Removed value: -[
-  {
-    "name": "django"
-  },
-  {
-    "name": "pandas"
-  }
-]

changedOutput schema / (root)

Previous value: -{
-  "properties": {
-    "author": {
-      "description": "Package author name",
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "author_email": {
-      "description": "Package author email",
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "home_page": {
-      "description": "Package homepage URL",
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "keywords": {
-      "description": "Package keywords",
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "latest_files": {
-      "description": "Latest distribution files",
-      "items": {
-        "properties": {
-          "filename": {
-            "description": "Distribution filename",
-            "type": "string"
-          },
-          "packagetype": {
-            "description": "Package type (e.g., sdist, bdist_wheel)",
-            "type": "string"
-          },
-          "upload_time": {
-            "description": "Upload timestamp",
-            "type": "string"
-          },
-          "url": {
-            "description": "Download URL",
-            "type": "string"
-          }
-        },
-        "required": [
-          "filename",
-          "packagetype",
-          "upload_time",
-          "url"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    },
-    "license": {
-      "description": "License type",
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "name": {
-      "description": "Package name",
-      "type": "string"
-    },
-    "project_urls": {
-      "description": "Additional project URLs",
-      "type": "object"
-    },
-    "recent_versions": {
-      "description": "Last 10 available versions",
-      "items": {
-        "type": "string"
-      },
-      "type": "array"
-    },
-    "requires_python": {
-      "description": "Python version requirement",
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "summary": {
-      "description": "Short package description",
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "version": {
-      "description": "Latest version number",
-      "type": "string"
-    }
-  },
-  "required": [
-    "name",
-    "version",
-    "summary",
-    "author",
-    "author_email",
-    "license",
-    "requires_python",
-    "home_page",
-    "project_urls",
-    "keywords",
-    "recent_versions",
-    "latest_files"
-  ],
-  "type": "object"
-}New value: +null

Changed1 schema field changedMay 8, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "author": {
+      "description": "Package author name",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "author_email": {
+      "description": "Package author email",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "home_page": {
+      "description": "Package homepage URL",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "keywords": {
+      "description": "Package keywords",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "latest_files": {
+      "description": "Latest distribution files",
+      "items": {
+        "properties": {
+          "filename": {
+            "description": "Distribution filename",
+            "type": "string"
+          },
+          "packagetype": {
+            "description": "Package type (e.g., sdist, bdist_wheel)",
+            "type": "string"
+          },
+          "upload_time": {
+            "description": "Upload timestamp",
+            "type": "string"
+          },
+          "url": {
+            "description": "Download URL",
+            "type": "string"
+          }
+        },
+        "required": [
+          "filename",
+          "packagetype",
+          "upload_time",
+          "url"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "license": {
+      "description": "License type",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "name": {
+      "description": "Package name",
+      "type": "string"
+    },
+    "project_urls": {
+      "description": "Additional project URLs",
+      "type": "object"
+    },
+    "recent_versions": {
+      "description": "Last 10 available versions",
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "requires_python": {
+      "description": "Python version requirement",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "summary": {
+      "description": "Short package description",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "version": {
+      "description": "Latest version number",
+      "type": "string"
+    }
+  },
+  "required": [
+    "name",
+    "version",
+    "summary",
+    "author",
+    "author_email",
+    "license",
+    "requires_python",
+    "home_page",
+    "project_urls",
+    "keywords",
+    "recent_versions",
+    "latest_files"
+  ],
+  "type": "object"
+}

Changed1 schema field changedMay 6, 2026

addedInput schema / examples

Added value: +[
+  {
+    "name": "django"
+  },
+  {
+    "name": "pandas"
+  }
+]

First observedApr 22, 2026

TDQS

A4.5/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and no destructiveness. The description adds value by detailing the returned metadata (version, summary, keywords, etc.), helping the agent understand the output.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three concise sentences, front-loaded with the core purpose, no wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With an output schema present, the description sufficiently covers what the tool returns, and the annotations cover safety. The tool definition is complete for the agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and the parameter description is already clear. The description reiterates the example, adding little extra meaning beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states it retrieves metadata for a Python package on PyPI, listing specific fields (latest version, summary, etc.). It distinguishes from siblings like get_package_version.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It instructs to pass the exact pip package name, providing clarity on input. While no explicit alternatives are given, the purpose is specific enough for an agent to infer when to use.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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Get Package

Input Schema

Output Schema

Schema Changelog

TDQS

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