Heads up During early access these endpoints are served through MCP — connect your agent in two minutes. Direct REST calls are available on the Unlimited plan: email us.

Introduction

A cross-market financial data API. Historical statements and disclosures parsed directly from each market's XBRL filings.

Rockmoon covers three markets — US (SEC), JP (EDINET + TDnet), and KR (DART) — and normalizes them into one schema. Every value you read from the API is extracted directly from a specific XBRL fact in a specific filing.

There is no real-time price feed, no analyst estimates, no forward guidance — Rockmoon is what's in the filings, normalized and queryable.

What you can access

Financial statements — income statement, balance sheet, cash flow. Quarterly and annual, normalized to a single canonical schema. See Financials.
Segments — per-segment revenue, operating income, assets, and capex with per-segment time series. See Segments.
Ownership — insider trades, institutional holdings, major shareholders, and director holdings. See Ownership.
MCP server — same data exposed as 17 Model-Context-Protocol tools for Claude Desktop, Cursor, Cline, and other LLM clients. See MCP server.

Quick start

Three steps. About sixty seconds.

1. Get an API key

Sign in at /login using Google OAuth or a one-time email link. A free-tier key is provisioned automatically. Find it on your dashboard.

2. Make your first call

Pass the key in the X-API-Key header. Try the company-detail endpoint with AAPL — it's free-tier accessible and works without quota.

curl -H "X-API-Key: rk_YOUR_KEY" \
  https://api.rockmoon.ai/v1/company/AAPL

import requests

headers = {"X-API-Key": "rk_YOUR_KEY"}
r = requests.get("https://api.rockmoon.ai/v1/company/AAPL", headers=headers)
company = r.json()
print(company["name"], company["industry"])

const r = await fetch("https://api.rockmoon.ai/v1/company/AAPL", {
  headers: { "X-API-Key": "rk_YOUR_KEY" }
});
const company = await r.json();
console.log(company.name, company.industry);

3. Read the per-section docs

Each API section in the sidebar has detailed per-endpoint documentation — parameters, response schema, edge cases, and per-market caveats. Start with Financials (the core) or jump to whatever your use case needs.

What's in this documentation

Reference

Errors — uniform error shape, full list of code slugs
Pricing — Free / Basic quotas and rate limits
Ticker format — alphabetic (US), 4-digit (JP), 6-digit (KR)

Endpoint sections

Companies — cross-market search, company detail
Financials — IS / BS / CF (combined or individual)
Segments — per-segment IS / BS / CF + trend
Ownership — insider, institutional, major shareholders, directors
MCP server — same financial data over Model Context Protocol (Claude Desktop, IDE tools)

Conventions used in these docs

Method + path are shown above every endpoint section. Path params are {ticker}; query params come after ?.
Required parameters are flagged in red in the params table. Anything else is optional with a documented default.
rk_YOUR_KEY in code samples is the literal placeholder text — replace with your key from /dashboard.

Up next Errors → Or jump to Companies →