Free and open source, no signup. The theme changes with the era. Borders before ~500 BC are approximate, and leader data is thin before 1600, so corrections are very welcome. Link in comments.

code: https://github.com/nsijwali/WhoRuled

built this after getting tired of manually writing fetch wrappers for sites with no public API. point it at a HAR file (browser network capture) and it generates a typed client.

input: a captured request to something like `GET /users/42`

output (simplified):

export interface User {

id: number;

name: string;

email: string;

}

export async function getUser(id: number): Promise<User> {

const res = await fetch(`${baseUrl}/users/${id}`);

if (!res.ok) throw new ApiError(res.status, await res.text());

return res.json();

}

it infers the types from the actual response bodies in the capture, templates dynamic path segments like `{id}`, and also generates an OpenAPI spec + mock server from the same HAR.

also tries to catch GraphQL/tRPC/JSON-RPC calls instead of treating everything as REST, and strips anything sensitive (tokens, cookies) from the captured data before it reaches the generated code.

npx har2sdk capture.har -o ./sdk

repo: https://github.com/Mersbyte/har2sdk

curious what people think of the generated code style, or if anyone's hit an API shape it chokes on.

Spent the last months building

@datastripes/forecast
@datastripes/dashboard
@datastripes/anomaly 

These are framework-agnostic npm packages (React, Vue, Angular, or a plain custom element) that add time-series forecasting, an editable dashboard builder, and anomaly detection to any frontend app.

Everything runs client-side via WebAssembly, so no user data ever hits a server except a license check without a backend to deploy, no Python microservice.

Would genuinely love feedback from anyone who's had to build this kind of feature in-house.

https://datastripes.com/forecast-widget/

https://datastripes.com/dashboard-widget/

https://datastripes.com/anomaly-widget/