import { StockQueryResult } from '../types.js';
export class FMPQuery {
FMP_BASE_URL = 'https://financialmodelingprep.com/stable/';
/**
* Query the 50 biggest stock gainers.
*/
async queryBiggestGainers(top = 10): Promise<StockQueryResult[]> {
const url = new URL(`${this.FMP_BASE_URL}/biggest-gainers`);
url.searchParams.append('apikey', process.env.FMP_API_KEY!);
const response = await fetch(url.toString());
if (!response.ok) {
throw new Error(
`FMP API error for biggest-gainers: ${response.statusText}`
);
}
const data = await response.json();
return data.slice(0, top).map(
(item: any) =>
({
symbol: item.symbol,
price: item.price,
name: item.name,
change: item.change,
changesPercentage: item.changesPercentage,
exchange: item.exchange,
}) as StockQueryResult
);
}
/**
* Query the 50 biggest stock losers.
*/
async queryBiggestLosers(top = 10): Promise<StockQueryResult[]> {
const url = new URL(`${this.FMP_BASE_URL}/biggest-losers`);
url.searchParams.append('apikey', process.env.FMP_API_KEY!);
const response = await fetch(url.toString());
if (!response.ok) {
throw new Error(
`FMP API error for biggest-losers: ${response.statusText}`
);
}
const data = await response.json();
return data.slice(0, top).map(
(item: any) =>
({
symbol: item.symbol,
price: item.price,
name: item.name,
change: item.change,
changesPercentage: item.changesPercentage,
exchange: item.exchange,
}) as StockQueryResult
);
}
/**
* Query the 50 top traded stocks.
*/
async queryTopTradedStocks(top = 10): Promise<StockQueryResult[]> {
const url = new URL(`${this.FMP_BASE_URL}/most-actives`);
url.searchParams.append('apikey', process.env.FMP_API_KEY!);
const response = await fetch(url.toString());
if (!response.ok) {
throw new Error(`FMP API error for most-actives: ${response.statusText}`);
}
const data = await response.json();
return data.slice(0, top).map(
(item: any) =>
({
symbol: item.symbol,
price: item.price,
name: item.name,
change: item.change,
changesPercentage: item.changesPercentage,
exchange: item.exchange,
}) as StockQueryResult
);
}
}
