# Semantic API MCP Server
<!-- mcp-name: io.github.peter-j-thompson/semanticapi -->
An [MCP (Model Context Protocol)](https://modelcontextprotocol.io) server that lets Claude, ChatGPT, and other LLM agents search and discover APIs using natural language via [Semantic API](https://semanticapi.dev). Ask for any API capability in plain English and get back endpoint details, parameters, auth info, and code snippets.
## Install
```bash
pip install semanticapi-mcp
```
Or run directly with uvx:
```bash
uvx semanticapi-mcp
```
## Configuration
### Get an API Key
Sign up at [semanticapi.dev](https://semanticapi.dev) to get your API key.
### Environment Variables
| Variable | Required | Default | Description |
|----------|----------|---------|-------------|
| `SEMANTIC_API_KEY` | Yes | — | Your Semantic API key |
| `SEMANTIC_API_URL` | No | `https://semanticapi.dev` | API base URL override |
### Claude Desktop
Add to your Claude Desktop config (`~/Library/Application Support/Claude/claude_desktop_config.json`):
```json
{
"mcpServers": {
"semanticapi": {
"command": "uvx",
"args": ["semanticapi-mcp"],
"env": {
"SEMANTIC_API_KEY": "your-api-key-here"
}
}
}
}
```
Or if installed with pip:
```json
{
"mcpServers": {
"semanticapi": {
"command": "semanticapi-mcp",
"env": {
"SEMANTIC_API_KEY": "your-api-key-here"
}
}
}
}
```
## Tools
### `semantic_query`
Search for an API capability using natural language.
**Inputs:**
- `query` (string, required) — What you want to do, e.g. "send an email with Gmail"
- `auto_discover` (boolean, optional, default: true) — Auto-discover new APIs if needed
**Example:** "Find me an API to convert currencies in real-time"
### `semantic_discover`
Deep discovery of a specific provider/API by name and intent.
**Inputs:**
- `provider_name` (string, required) — API provider name, e.g. "stripe", "twilio"
- `user_intent` (string, optional) — What you want to do with this API
**Example:** Discover Stripe's capabilities for "process a refund"
### `semantic_discover_url`
Analyze any API from its documentation URL.
**Inputs:**
- `url` (string, required) — URL of the API documentation
- `user_intent` (string, optional) — What you want to do with this API
**Example:** Analyze `https://docs.example.com/api` to generate a provider config
## Related
- **[Semantic API](https://semanticapi.dev)** — The hosted API service
- **[semanticapi-engine](https://github.com/peter-j-thompson/semanticapi-engine)** — Open source engine (AGPL-3.0)
- **[semantic-api-skill](https://github.com/peter-j-thompson/semantic-api-skill)** — Agent framework skill package
- **[CLI Tool](https://github.com/peter-j-thompson/semanticapi-cli)** — Command-line interface (`pip install semanticapi-cli`)
<!-- mcp-name: io.github.peter-j-thompson/semanticapi -->
## License
MIT
