Prediction market agents need real-time odds, news correlation, and event outcome data to identify mispriced contracts and execute informed trades. The API stack you choose determines whether your agent spots opportunities before the market corrects. We evaluated five data sources for prediction market agent workflows on freshness, breadth, and cost.
Scavio provides prediction market agents with search intelligence covering news, SERP signals, and social sentiment that complements raw odds data from market APIs, enabling agents to correlate real-world signals with contract prices.
Full Ranking
Scavio
Agents correlating news, search trends, and social signals with prediction market odds
- Real-time news and SERP signals for event research
- Social sentiment data from TikTok and YouTube
- MCP server for agent-native data retrieval
- Affordable for continuous monitoring agents
- No direct prediction market odds data
- Requires separate market API for prices
- No historical odds or resolution data
Polymarket API
Agents trading directly on Polymarket needing real-time odds
- Free access to all market odds
- Real-time price and volume data
- Order book depth information
- Event resolution history
- Limited to Polymarket only
- No SLA or uptime guarantee
- API can change without notice
- No news or context data
Metaculus API
Agents focused on long-term forecasting questions with community calibration
- Free access to forecasting data
- Community prediction calibration scores
- Diverse question categories
- Historical resolution data
- Not a real-money market
- Slower-moving odds
- Limited to platform questions
- No trading capability
Kalshi API
US-regulated prediction market trading agents
- CFTC-regulated US market
- Real-time odds and order book
- Official API with documentation
- Legal for US traders
- US-only market access
- Smaller market selection than Polymarket
- Lower liquidity on many contracts
- No contextual news data
NewsAPI
Agents needing structured news data for event correlation
- 80K+ news sources indexed
- Real-time article access
- Structured metadata and categories
- Historical article search
- $449/mo for production use
- Free tier useless for agents (100 req/day)
- No prediction market data
- No social or SERP signals
Side-by-Side Comparison
| Criteria | Scavio | Runner-up | 3rd Place |
|---|---|---|---|
| Monthly cost | $30 | Free | Free |
| Market odds data | No (via search) | Yes (real-time) | Yes (forecasts) |
| News signals | Yes (SERP+search) | No | No |
| Social signals | Yes (TikTok+YouTube) | No | No |
| MCP support | Yes | No | No |
| Agent integration | MCP + REST | REST + WebSocket | REST |
Why Scavio Wins
- Only API providing news, SERP, and social signals through an MCP server that prediction market agents can query natively
- Agents using Scavio + Polymarket API together get both odds data and contextual intelligence for informed trading
- Polymarket API wins for direct access to real-time odds and order book data that Scavio cannot provide
- Kalshi API wins for US-regulated markets with legal clarity for American traders
- Scavio cannot replace a prediction market API for odds data; it complements market APIs with search intelligence