Your customers' financial life already arrives in their inbox. Turn it into product.

import { FinLensAdmin } from "@finlens/node";

const fl = new FinLensAdmin({ apiKeyId, apiSecret }); // HMAC built in

// 1 · Mint a connect token for your frontend
const { connectToken } = await fl.connect.createToken({
  endUserRef: "user_8231",
  products: ["insights"],
});

// 2 · Exchange after the user consents
const { grantId, personaId } = await fl.connect.exchange({ publicToken });

// 3 · Short-lived, read-only token for your frontend
const { clientToken } = await fl.personas.clientToken(personaId);

import { FinLens } from "@finlens/react-native";

const fl = FinLens.init({ env: "sandbox" });

// Chrome Custom Tabs / ASWebAuthenticationSession —
// never a WebView, returns via verified app links
const handler = fl.createConnect({
  connectToken,
  onSuccess: ({ publicToken }) => api.link(publicToken),
  onExit:    ({ code }) => {},
});
handler.open();

const { insights } = await fl.client({ clientToken })
  .insights.list({ state: "new" });

final fl = FinLens.init(env: Env.sandbox);

// Same names as the TS SDKs — docs translate 1:1
final handler = fl.createConnect(
  connectToken: connectToken,
  onSuccess: (r) => api.link(r.publicToken),
  onExit: (e) => {},
);
await handler.open();

final insights = await fl
    .client(clientToken)
    .insights
    .list(state: "new");

// Signed, retried, replayable — verify in one line
app.post("/finlens/webhooks", (req, res) => {
  const events = fl.webhooks.verify(req.headers, req.rawBody);

  for (const e of events) {
    switch (e.type) {
      case "insight.created":       // new money leak found
      case "grant.requires_relink": // user revoked at provider
      case "consent.revoked":       // user revoked your app
        handle(e);
    }
  }
  res.sendStatus(200);
});