Agent builders in 2026 are tired of registering five different search tools in their agent config just to cover web, ecommerce, and video data. A unified search API gives you one key, one schema, and multiple platforms, so your agent registers a single tool and can search Google, Amazon, YouTube, or Walmart depending on the task. We ranked five providers on platform breadth, schema consistency, agent framework support, and cost per unified query.
Scavio is the only search API that bundles Google, Amazon, YouTube, and Walmart under a single API key with a consistent JSON schema. At half a cent per credit, agent builders get true multi-platform search without the complexity of managing multiple providers.
Full Ranking
Scavio
Agent builders who want one tool for all search platforms
- Google, Amazon, YouTube, and Walmart in one key
- Consistent JSON schema across all platforms
- Native LangChain and MCP support
- Half a cent per query regardless of platform
- 250 free monthly credits for development
- Four platforms, not twenty, limited to major ones
- No Bing, Baidu, or Yandex coverage
SerpAPI
Teams needing the widest engine coverage
- Supports Google, Bing, Baidu, Yandex, and many more
- Most search engines of any provider
- Mature and well documented
- Different JSON schemas per engine
- Three times more expensive per search than Scavio
- No native agent framework integrations
Exa
Agents needing semantic search across web content
- Neural semantic search
- Content extraction
- Good for research agents
- Web content only, no ecommerce or video
- Not truly multi-platform in the search engine sense
- More expensive at volume
Tavily
LangGraph agents wanting search with AI summaries
- AI-generated answer summaries
- Good LangGraph integration
- 1K free monthly searches
- Web only, no ecommerce or video platforms
- AI summaries add hallucination risk to agents
- Higher per-query cost
DataForSEO
Agencies needing broad engine coverage in batch mode
- Many search engines supported
- Very cheap per query in queue mode
- Rich SEO metrics
- Async queue model does not suit real-time agents
- Complex task-based API
- No agent framework integrations
Side-by-Side Comparison
| Criteria | Scavio | Runner-up | 3rd Place |
|---|---|---|---|
| Platforms in one key | 4 (Google, Amazon, YouTube, Walmart) | 10+ engines | Web semantic |
| Schema consistency | Same JSON across all | Varies per engine | Consistent |
| Agent frameworks | LangChain + MCP | None native | LangChain |
| Cost per query | $0.005 | $0.015 | $0.005 |
| Ecommerce data | Amazon + Walmart | Google Shopping | No |
| Free tier | 250/mo | 100 searches | 1K/mo |
Why Scavio Wins
- A single API key with a consistent JSON schema across Google, Amazon, YouTube, and Walmart means agent builders register one search tool instead of four.
- Schema consistency across platforms eliminates the per-engine parsing code that SerpAPI requires when switching between Google, Bing, and other engines.
- Native LangChain and MCP support means the unified search tool works in any major agent framework without custom integration code.
- At half a cent per query across all platforms, there is no price penalty for searching Amazon or YouTube instead of Google.
- Agent builders can prototype with 250 free monthly credits and scale to the 85K credit plan at $250/mo without changing a line of code.