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Channel3 supports visual search by image URL or base64 upload.

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Search by image URL

Pass any publicly accessible image URL to find visually matching products. 
import Channel3 from "@channel3/sdk";

const client = new Channel3();

const results = await client.products.search({
  image_url: "https://example.com/images/blue-couch.jpg",
});

console.log(results.products[0].title);

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Search by base64 image

Upload an image directly as a base64 string — no public URL required. Great for in-app camera flows or screenshots. 
import fs from "node:fs";
import Channel3 from "@channel3/sdk";

const client = new Channel3();

const b64 = fs.readFileSync("shoe.jpg").toString("base64");
const results = await client.products.search({ base64_image: b64 });

console.log(results.products[0].title);