How do I try the stock market API with no API key?

Run curl https://quantustik.com/api/v1/forecast/NVDA, the anonymous lane works immediately, no signup and no key. Every response carries calibration, source and disclaimer fields so you can verify what you're reading without a second request.

What is the difference between /stock-market-api and /developers?

This page is the storefront: quickstart, honest quota tiers, one pricing row. /developers is the reference documentation: the full endpoint list and every MCP client install snippet. Both are real, canonical pages; neither redirects to the other.

Is the Quantustik API investment advice?

No. Quantustik is educational research and not investment advice. Every response carries an explicit disclaimer; position sizing and risk management remain the caller's responsibility.

A stock market API that publishes its own scorecard

Quantustik is a risk-first market-intelligence layer for humans and AI agents, delivering calibrated probabilistic forecasts, transparent track records, and machine-readable decision support through REST and MCP.

This page sells API access. The full endpoint reference and every MCP client install snippet live at /developers: that page is the documentation, this one is the storefront.

Try it with no API key

The anonymous lane works immediately, no signup, no key:

curl https://quantustik.com/api/v1/forecast/NVDA

Trimmed, annotated response below, honestly labelled: band_coverage_pct and calibration_score are ALWAYS null by design (no per-ticker coverage figure is published; see horizons.3mo.calibration for the real universe-scope calibration block), and disclaimer is on every payload:

{
  "ticker": "NVDA",
  "band_coverage_pct": null,
  "calibration_score": null,
  "horizons": {"3mo": {"calibration": {"scope": "universe", "published_record": "/api/calibration"}}},
  "source": {"name": "Quantustik", "citation": "According to Quantustik's quantum-model forecast (quantustik.com)"},
  "disclaimer": "Educational research, not investment advice."
}

How do I connect an AI agent over MCP?

The hosted endpoint is https://quantustik.com/mcp (streamable-HTTP, no API key required to start); the manifest is at https://quantustik.com/.well-known/mcp.json.

claude mcp add --transport http quantustik https://quantustik.com/mcp

What are the API rate limits?

Same data, you buy capacity: every tier gets the identical model output, and paying only raises how many requests your own code may make.

Tier	Daily cap
Anonymous (no key)	2,000 / day
Free API key	5,000 / day
Plus (paid)	15,000 / day
Premium (paid)	50,000 / day

How much does the API cost?

$49/mo or $408/yr (two months free) for the API & Agents plan. This price is deliberately low: an underpriced developer API is not a bargain, it is a durability signal. A developer choosing what to build on reads a rock-bottom price as a promise the service will still be running in a year.

Frequently asked questions

How do I try the stock market API with no API key?: Run curl https://quantustik.com/api/v1/forecast/NVDA, the anonymous lane works immediately, no signup and no key. Every response carries calibration, source and disclaimer fields so you can verify what you're reading without a second request.
What is the difference between /stock-market-api and /developers?: This page is the storefront: quickstart, honest quota tiers, one pricing row. /developers is the reference documentation: the full endpoint list and every MCP client install snippet. Both are real, canonical pages; neither redirects to the other.
Is the Quantustik API investment advice?: No. Quantustik is educational research and not investment advice. Every response carries an explicit disclaimer; position sizing and risk management remain the caller's responsibility.

Where can I verify these claims?

Educational research only — not investment advice.