Trading agents built on Claude, GPT, or open-source LLMs need real-time market data delivered through MCP for grounded analysis. The right MCP server provides price feeds, sentiment, and prediction market data that agents can query conversationally. We evaluated five options for data freshness, market coverage, and MCP integration quality.
Scavio MCP server provides search-powered market intelligence including prediction market data, news sentiment, and SERP signals that complement raw price feeds from dedicated financial data providers.
Full Ranking
Scavio
Agents needing market sentiment, news search, and prediction market context alongside trading data
- MCP server provides market-relevant search data to trading agents
- Prediction market coverage through SERP queries
- News and sentiment signals from search data
- One key covers market research + social signals
- Not a direct price feed or exchange API
- No real-time tick data
- No order execution capability
Polygon.io
Agents needing real-time US equities and crypto price data
- Real-time and historical price data
- WebSocket streaming for live feeds
- Comprehensive US equity coverage
- Community MCP server available
- No built-in MCP server from vendor
- Expensive for real-time tier
- Limited to price/volume data
- No sentiment or news analysis
Alpha Vantage
Budget-conscious developers prototyping trading agents
- Free tier for prototyping
- Fundamental and technical data
- Forex and crypto coverage
- Simple REST API
- Harsh rate limits on free tier
- No official MCP server
- Data delayed on free plan
- Limited real-time capability
Twelve Data
Agents needing technical indicators pre-calculated
- 100+ technical indicators via API
- Global stock exchange coverage
- WebSocket for real-time data
- Good documentation
- No MCP integration
- Limited free tier
- No sentiment or alternative data
- Request limits per day
Polymarket API (unofficial)
Agents specifically focused on prediction market arbitrage
- Free access to prediction market data
- Real-time odds and volume
- Covers politics, crypto, and events
- Open API structure
- No official support or SLA
- Can break without notice
- Limited to prediction markets only
- No MCP server available
Side-by-Side Comparison
| Criteria | Scavio | Runner-up | 3rd Place |
|---|---|---|---|
| MCP server | Official | Community | None |
| Data type | Search + sentiment | Price + volume | Price + fundamentals |
| Real-time | Near (search) | Yes (WebSocket) | 25 req/day free |
| Monthly cost | $30 | $29-199 | Free-$49 |
| Prediction markets | Via search | No | No |
| Agent-ready format | Yes (MCP) | REST/WS | REST |
Why Scavio Wins
- Only provider with an official MCP server, letting trading agents query market context conversationally
- Combines prediction market signals, news sentiment, and SERP data that pure price APIs lack
- Polygon.io wins decisively for real-time tick-level price data and order book depth
- Alpha Vantage wins for free prototyping of trading agent concepts before investing in paid APIs
- Scavio is not a substitute for a price feed; it complements exchange APIs with search intelligence