| What it does | The interoperability layer for AI-enabled websites
| Point-in-time market data API for backtesting and quantitative research
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
| US
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| Pricing model | Open source
| Freemium
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| Pricing | Free and open source
| Free: 1,000 calls/day, last 12 months of data. Look-back history: $195 for 5 years (one-time), $290 for 10 years, $385 for 15 years, $480 for 20 years, $575 for 25 years, $670 for 30 years, plus $19.95/month for daily updates. Individual products: GEX from $29 per ticker, futures from $49 per market
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| Key features | - Multi-protocol support - projects to MCP, ACP, AP2, NLWeb, REST, GraphQL, OpenAPI and feeds
- AI Readiness Validator - scores site readiness from 0 to 100 with per-capability checks
- Discovery network - agents can discover AI-ready sites by capability or type
- OAuth2 with PKCE support for secure authentication
- SDKs in 8 languages - TypeScript, JavaScript, React, Python, PHP, Go, .NET and Ruby
- WordPress plugin for auto-generating AI2Web manifests
- Chrome extension for checking any site's AI readiness instantly
- SSRF protection for all outbound requests
- Supports llms.txt and agent.json formats for backwards compatibility
| - 16,000+ US stocks including delisted names with 26+ years of history
- Point-in-time dealer gamma (GEX) for 11,209 stocks, ETFs and indexes since 2010
- 22,700+ macro series with historical vintages and revisions
- Intraday bars at 1-minute, 5-minute, 15-minute, 30-minute, hourly and daily resolutions
- SEC fundamentals and 13F institutional holdings point-in-time since 2013
- Python client with yfinance-style interface returning pandas DataFrames
- MCP server integration for AI agents including Claude and ChatGPT
- COT positioning data since 1986 for futures markets
- CSV and Parquet download formats with bulk file options
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| What makes it different | - Describe your website once in a single manifest, projects automatically to all major AI protocols
- No vendor lock-in and no per-vendor rebuilds required
- Built-in safety by construction - high-risk actions always preview before running
- Free and open source with CC-BY 4.0 spec and MIT licensed SDKs
- Works across Claude, ChatGPT and any MCP client without per-vendor work
| - Survivorship-free: includes 9,000+ delisted stocks that broker APIs omit for more realistic backtests
- Point-in-time accuracy prevents look-ahead bias in fundamentals and macro data
- All data accessible through single API without stitching multiple sources together
- Data ownership: purchased history is yours to download and keep forever
- Intraday bars back 26+ years unlike brokers that provide only 60 days
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 13 ▲ +1 (up) since last check | 2 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 9 | 3 |
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| Citation Flow (Majestic) | 19 | 26 |
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| Referring domains (Majestic) | 61 | 18 |
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AI2Web
FinzData