Fastify
Use Firecrawl with Fastify to build high-performance web scraping and search APIs.
Prerequisites
- Node.js 18+
- A Firecrawl API key — get one free
Setup
npm install fastify firecrawlAdd your API key to .env:
FIRECRAWL_API_KEY=fc-YOUR-API-KEYSearch the web
import Fastify from "fastify";
import { Firecrawl } from "firecrawl";
const fastify = Fastify({ logger: true });
const firecrawl = new Firecrawl({ apiKey: process.env.FIRECRAWL_API_KEY });
fastify.post("/search", async (request) => {
const { query } = request.body;
return firecrawl.search(query, { limit: 5 });
});
fastify.listen({ port: 3000 });Scrape a page
fastify.post("/scrape", async (request) => {
const { url } = request.body;
return firecrawl.scrape(url);
});Interact with a page
Use interact to control a live browser session — click buttons, fill forms, and extract dynamic content.
fastify.post("/interact", async (request) => {
const { url } = request.body;
const result = await firecrawl.scrape(url, { formats: ['markdown'] });
const scrapeId = result.metadata?.scrapeId;
await firecrawl.interact(scrapeId, { prompt: 'Search for iPhone 16 Pro Max' });
const response = await firecrawl.interact(scrapeId, { prompt: 'Click on the first result and tell me the price' });
await firecrawl.stopInteraction(scrapeId);
return { output: response.output };
});As a Fastify plugin
Encapsulate the client in a plugin for reuse across routes:
import fp from "fastify-plugin";
import { Firecrawl } from "firecrawl";
export default fp(async function firecrawlPlugin(fastify) {
const client = new Firecrawl({ apiKey: process.env.FIRECRAWL_API_KEY });
fastify.decorate("firecrawl", client);
});Register the plugin, then use fastify.firecrawl in any route:
fastify.register(firecrawlPlugin);
fastify.post("/search", async function (request) {
const { query } = request.body;
return this.firecrawl.search(query, { limit: 5 });
});Test it
curl -X POST http://localhost:3000/search \
-H "Content-Type: application/json" \
-d '{"query": "firecrawl web scraping"}'Next steps
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