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Prerequisites

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Install the SDK

npm install @mendable/firecrawl-js

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Set your API key

Add your API key to .env: 
FIRECRAWL_API_KEY=fc-YOUR-API-KEY

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Build the Firecrawl tools

Create src/mastra/tools/firecrawl.ts to expose search and scrape as Mastra tools: 
import Firecrawl from "@mendable/firecrawl-js";
import { createTool } from "@mastra/core/tools";
import { z } from "zod";

const firecrawl = new Firecrawl({ apiKey: process.env.FIRECRAWL_API_KEY! });

export const firecrawlSearch = createTool({
  id: "firecrawl-search",
  description: "Search the web and return top results.",
  inputSchema: z.object({ query: z.string().min(1) }),
  outputSchema: z.object({
    results: z.array(
      z.object({
        title: z.string().nullable(),
        url: z.string(),
      }),
    ),
  }),
  execute: async ({ query }) => {
    const results = await firecrawl.search(query, { limit: 3 });
    return {
      results: (results.web ?? []).map((item) => ({
        title: item.title ?? null,
        url: item.url,
      })),
    };
  },
});

export const firecrawlScrape = createTool({
  id: "firecrawl-scrape",
  description: "Scrape a URL and return markdown content.",
  inputSchema: z.object({ url: z.string().url() }),
  outputSchema: z.object({ markdown: z.string() }),
  execute: async ({ url }) => {
    const result = await firecrawl.scrape(url, {
      formats: ["markdown"],
      onlyMainContent: true,
    });
    return { markdown: result.markdown ?? "" };
  },
});

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Create the agent

Create src/mastra/agents/web-agent.ts and give it the Firecrawl tools: 
import { Agent } from "@mastra/core/agent";
import { firecrawlSearch, firecrawlScrape } from "../tools/firecrawl";

export const webAgent = new Agent({
  id: "web-agent",
  name: "Web Agent",
  instructions:
    "Use Firecrawl tools to search and scrape web pages, then summarize the results.",
  model: "openai/gpt-5.4",
  tools: { firecrawlSearch, firecrawlScrape },
});

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Register the agent

Register the agent on your Mastra instance in src/mastra/index.ts: 
import { Mastra } from "@mastra/core";
import { webAgent } from "./agents/web-agent";

export const mastra = new Mastra({
  agents: { webAgent },
});

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Test in Studio

Run the dev server and open Mastra Studio: 
mastra dev
Open the Web Agent and try prompts like:
  • “Find the latest Firecrawl changelog and summarize the last release.”
  • “Search for Firecrawl pricing and extract the plan tiers.”

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Self-hosted Firecrawl

If you run Firecrawl locally, set FIRECRAWL_API_URL and pass apiUrl to the client: 
const firecrawl = new Firecrawl({
  apiKey: process.env.FIRECRAWL_API_KEY!,
  apiUrl: process.env.FIRECRAWL_API_URL,
});

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Next steps

Scrape docs

All scrape options including formats, actions, and proxies

Search docs

Search the web and get full page content

Agent docs

Let an agent drive Firecrawl end to end

Node SDK reference

Full SDK reference with crawl, map, batch scrape, and more