MCP Servers

MCP Public APIs

An MCP server that indexes the public-apis catalogue, allowing LLMs to search and filter over 1,400 public APIs by category, authentication type, and technical requirements. It facilitates precise API discovery for developers by providing tools to query specific features like HTTPS support and CORS compatibility.

README

MCP Public APIs

An MCP server that indexes the public-apis catalogue and lets an LLM query it by category, auth type, HTTPS support, CORS, and keyword — without browsing the README manually.

Why

Without this MCP, an LLM recommending a public API has to guess or ask the user to check manually. With it, the LLM can say:

"I need a Books API, HTTPS, no auth, CORS-enabled for your React app." → query_apis(category="Books", no_auth=True, https=True, cors="yes")

Tools

Tool	Description
`list_categories`	Returns all available API categories (Animals, Finance, …)
`query_apis`	Filters the index by keyword, category, auth, HTTPS, CORS
`update_index`	Re-downloads the README and rebuilds the index

`query_apis` parameters

Parameter	Type	Description
`keyword`	`str`	Substring match on name or description
`category`	`str`	Exact category (case-insensitive)
`auth`	`str`	`"apiKey"`, `"OAuth"`, `""` (none), etc.
`no_auth`	`bool`	Shortcut: APIs that need no authentication
`https`	`bool`	`True` = HTTPS only, `False` = HTTP only
`cors`	`str`	`"yes"`, `"no"`, `"unknown"`

Installation

cd MCP_PUBLIC_APIS
pip install -e .

Running

mcp-public-apis

Or add it to your MCP client config:

{
  "mcpServers": {
    "public-apis": {
      "command": "mcp-public-apis"
    }
  }
}

Development

pip install -e ".[dev]"
pytest

Data Source

The index is built from the raw README.md of public-apis/public-apis on GitHub, which lists ~1400 public APIs organised into ~80 categories. The schema mirrors the README table exactly:

name · url · description · auth · https · cors · category

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