# 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). Every answer Quinn returns is signed with an Ed25519 key and carries a receipt id. The signing key and the verifier are both public and need no credential, so a third party can confirm an answer is byte-for-byte the one we produced. The receipt holds SHA-256 hashes of the question and answer rather than their text, so it can be shared without exposing the conversation. 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. Of the 52 operations in the specification, 24 need no credential and 28 require an API key. The keyless set covers quotes, bars, fundamentals, earnings history, corporate actions, calendars, macro series, the screener and the plans endpoint. A key also raises rate limits; issue one at /developers.html. The MCP servers are separately gated and return HTTP 401 to an anonymous request. 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. - [Answer verification key](https://quintarthai.com/api/v1/lineage/pubkey): keyless. The Ed25519 public key that signs every Quinn answer. - [Verify a receipt](https://quintarthai.com/api/v1/lineage/verify/RECEIPT_ID): keyless. Returns signature_valid over the exact signed payload, so an answer can be checked without trusting our response. Procedure: https://quintarthai.com/verify/ - [Cross-border disclosure map](https://quintarthai.com/api/v1/cross-border/map): keyless. For 59 dual-listed pairs, the single authoritative annual document. Published finding: with_cross_border_divergence = 0 — MJDS filers wrap the Canadian AIF into the SEC filing, so there is nothing to diff. ## 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. ## Specialist panel Eight domain specialists — IPOs, insider behaviour, Canadian regulation, mining, ETFs and taxation, cross-border listings, valuation and risk. Each is a curated deterministic tool set with an explicit abstention rule, not a language model: it returns structured findings carrying provenance and never writes prose. Where two specialists report different values for the same quantity the panel returns BOTH readings under `conflicts` — it does not average them and does not pick a winner. A specialist with no applicable input abstains and states why, rather than narrating around the gap. Both endpoints require an authenticated subscription and refuse anonymous callers with HTTP 401 — verified by request, not assumed. One call fans out across several tool invocations against a metered feed, which is why it is gated rather than keyless. - [Specialist registry](https://quintarthai.com/api/v1/quinn/specialists): the eight specialists and the tools each one runs. Runs nothing. - [Run the panel](https://quintarthai.com/api/v1/quinn/specialists/TICKER): add `?only=risk,valuation` to run named specialists instead of all eight. ## 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.