peter-j-thompson/semanticapi-mcp

An MCP (Model Context Protocol) server that lets Claude, ChatGPT, and other LLM agents search and discover APIs using natural language via Semantic API. Ask for any API capability in plain English and get back endpoint details, parameters, auth info, and code snippets.
Install
Or run directly with uvx:
Configuration
Get an API Key
Sign up at 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):
Or if installed with pip:
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** — The hosted API service
- **semanticapi-engine** — Open source engine (AGPL-3.0)
- **semantic-api-skill** — Agent framework skill package