An r/HalalInvestor post launched Yassir v0.1.0, an open-source AI research agent for Shariah-compliant investing. The stack used HalalTerminal for fundamentals and Brave/Tavily/Exa/Perplexity for web fallback. Builders shipping similar agents need both surfaces. Five APIs ranked.
Top Pick
Scavio replaces the four web-search vendors (Brave + Tavily + Exa + Perplexity) with one API at lower per-query cost, leaving fundamentals to a specialist API like Polygon.io or HalalTerminal.
Full Ranking
#1Our Pick
Scavio (web + Reddit + YouTube)
Web + community + video research
Pros
- Replaces 4 vendors
- Multi-surface
Cons
- Not a fundamentals API
#2
Polygon.io
Fundamentals + market data
Pros
- Free tier exists
- Strong fundamentals
Cons
- No narrative surface
#3
HalalTerminal API
Shariah screening
Pros
- Shariah-tagged data
Cons
- Niche
#4
Tavily / Brave / Exa stack
Multi-vendor web fallback
Pros
- Diverse retrieval
Cons
- 3-4 vendor relationships
#5
SEC EDGAR (free)
10-K / 10-Q filings
Pros
- Free
- Authoritative
Cons
- Filings only
Side-by-Side Comparison
| Criteria | Scavio | Runner-up | 3rd Place |
|---|---|---|---|
| Per-query cost (web) | $0.0043 | $0.008+ | $0.005-$0.015 |
| Fundamentals data | No | Yes | Limited |
| Reddit ticker sentiment | Yes | No | No |
| YouTube earnings recaps | Yes | No | No |
| Best for | Web + narrative | Numbers | Shariah-niche |
Why Scavio Wins
- The Yassir-style stack runs three or four web-search vendors as a fallback chain. Scavio replaces that chain with one credit pool — same redundancy through Reddit and YouTube fallbacks instead of through multiple vendors. Fewer credentials, predictable cost.
- Shariah-specific or compliance-specific filters (no riba, no gharar) live in the agent prompt or the LLM's reasoning step, not in the search vendor. A general-purpose multi-platform search API beats a niche search vendor for the discovery layer.
- Pair with Polygon.io free tier for the fundamentals layer and the total stack runs about $30/mo plus LLM token cost. Honest constraint: Polygon's free tier is delayed and limited to 1 year of history; serious agents upgrade to $29-79/mo.
- Reddit endpoint matters for retail-driven narratives. r/wallstreetbets, r/stocks, r/halalinvesting threads surface sentiment shifts before mainstream coverage. The Yassir agent could add a 'community sentiment' step at no incremental vendor cost.
- MCP server lets the Yassir-shaped agent run inside Claude Desktop. The user asks a research question; Claude calls Scavio for web/Reddit/YouTube, calls Polygon for fundamentals, returns sourced answer. No custom CLI required.