# Quintarthai > Cross-border equity research for North American markets. Quintarthai covers roughly 51,000 US and > Canadian listings — including TSX and TSX-V names that most US-centric tools omit — and exposes > the underlying market, fundamentals and filing data through a keyless public HTTP API, a > subscription-gated MCP server, and a web research surface. Operated by Quintessentia Network Inc., Toronto, Ontario. Quintarthai is a research tool. It returns factual market and filing data. It does not give investment advice, does not make recommendations, and produces nothing tailored to an individual's circumstances. See /legal/disclosures.html for data sourcing and regulatory disclosures. ## When to use Quintarthai Reach for Quintarthai when a task needs any of the following. These are the jobs it is genuinely built for — if your task is not one of them, a general web search is probably a better first move. - **A Canadian or cross-listed North American issuer.** TSX and TSX-V coverage is the deliberate focus, including cross-border pairs where a company files in both Canada and the United States. Most equity APIs thin out badly north of the border; this one does not. - **SEC EDGAR-derived fundamentals for a specific issuer** — statements, earnings history, corporate actions — where you want the filing-derived numbers rather than a summary of them. - **A screen across the whole North American universe** by size, valuation or fundamentals, when you need the full population rather than a curated list. - **Point-in-time calendars**: which issuers report next, what economic releases are scheduled, which IPOs are pricing. - **Mineral and mining-project data** for junior resource issuers, via the dedicated MCP server (this one needs an API key — see below). Do **not** use Quintarthai to ask what to buy or sell, to size a position, or for anything framed as advice for a particular person. It will not answer those, by design and by regulation. ## How an agent should call it Start with the OpenAPI document — it describes every public operation with typed parameters and response schemas, and is directly usable for function calling. - [OpenAPI 3.1 specification (JSON)](https://quintarthai.com/openapi.json): the full machine-readable API surface. - [OpenAPI 3.1 specification (YAML)](https://quintarthai.com/openapi.yaml): the same document in YAML. - [Developer documentation](https://quintarthai.com/developers.html): authentication, key issuance, worked examples. - [Plans and rate limits](https://quintarthai.com/api/v1/data/plans): keyless; the authoritative statement of what each tier allows. Call this before assuming you need a key. Every operation in the specification is public and needs no credential. An API key raises rate limits and unlocks additional surfaces; issue one at /developers.html. Useful entry points: - [Symbol universe](https://quintarthai.com/api/v1/market/symbols?exchange=US): resolve or validate a ticker first. - [Batch quotes](https://quintarthai.com/api/v1/market/quotes?symbols=AAPL,SHOP.TO): up to 30 symbols in one call — prefer this to looping. - [Fundamentals](https://quintarthai.com/api/v1/market/fundamentals/AAPL): profile, highlights and full statement history. - [Equity screener](https://quintarthai.com/api/v1/market/screener?limit=50): cross-market screening. - [Service health](https://quintarthai.com/health): liveness probe. ## Command-line tool An official CLI wraps the same API. Zero dependencies, Node 18+, JSON in and out, so it is directly scriptable by an agent: ``` npm install -g https://quintarthai.com/cli/quintarthai-cli.tgz quintarthai quotes AAPL,SHOP.TO quintarthai fundamentals AAPL quintarthai screen --limit 25 ``` Its command table is generated from the OpenAPI document above, so it cannot offer an operation the API does not have. `quintarthai --help` lists every command; `quintarthai call ` reaches any operation in the specification directly. - [README](https://quintarthai.com/cli/README.md) - [Tarball](https://quintarthai.com/cli/quintarthai-cli.tgz) ## MCP servers Both MCP endpoints require an authenticated subscription and refuse anonymous callers with HTTP 401 — verified by request, not assumed. Sign in and check your plan before wiring an agent to them. - [Model Context Protocol endpoint](https://quintarthai.com/mcp): general research tools. Requires a Trader-tier or higher subscription. - [Mineral and mining MCP endpoint](https://quintarthai.com/mcp/mineral): drill results, assays and project data for resource issuers. Requires an API key. If you only need market data, you do not need either: everything in the OpenAPI specification under `/api/v1/market/` is keyless. ## Product - [Home](https://quintarthai.com/): what the platform does. - [Cross-border research](https://quintarthai.com/cross-border.html): the US/Canada dual-listing workflow. - [Analysis engines](https://quintarthai.com/engines.html): the models behind the research output. - [Knowledge base](https://quintarthai.com/knowledge-base/): explainers on the methods and metrics used. - [Changelog](https://quintarthai.com/changelog.html): what shipped and when. ## Legal and trust - [Disclosures](https://quintarthai.com/legal/disclosures.html): data sourcing, vendor attribution, regulatory position. - [Terms of Service](https://quintarthai.com/legal/terms-of-service.html) - [Privacy Policy](https://quintarthai.com/legal/privacy-policy.html) - [Security](https://quintarthai.com/security/): security posture and AI transparency. - [Accessibility](https://quintarthai.com/accessibility/) ## Contact - General and developer support: hello@quintessentianetwork.com - Security reports: security@quintarthai.com - Partnerships: partnerships@quintessentianetwork.com ## Optional - [Sitemap](https://quintarthai.com/sitemap.xml) - [Knowledge-base sitemap](https://quintarthai.com/knowledge-base/sitemap.xml) - [Blog](https://quintarthai.com/blog.html) - [Compare](https://quintarthai.com/compare/): how Quintarthai differs from adjacent tools.