> ## Documentation Index
> Fetch the complete documentation index at: https://docs.firecrawl.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Jev

> Use Firecrawl with TypeSafe's Jev to make fast, structured decisions on web data

Integrate Firecrawl with TypeSafe's Jev to make fast, structured decisions on web data.

## Setup

```bash theme={null}
npm install firecrawl @typesafe-ai/sdk
```

Create `.env` file:

```bash theme={null}
FIRECRAWL_API_KEY=your_firecrawl_key
TYPESAFE_API_KEY=your_typesafe_key
```

## Scrape + Decide

This example scrapes a page and asks Jev a single yes/no question about it. A `noul` question returns the probability of a yes answer, from 0 to 1.

```typescript theme={null}
import { Firecrawl } from 'firecrawl';
import { noul, TypeSafeClient } from '@typesafe-ai/sdk';

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

const page = await firecrawl.scrape('https://firecrawl.dev', { formats: ['markdown'] });

const { answers } = await typesafe.systemOne({
    state: { page: page.markdown ?? '' },
    questions: {
        hasFreeTier: noul('The product offers a free plan or free credits')
    }
});

console.log('Free tier:', answers.hasFreeTier.noul);
```

## Search + Filter

This example searches the web, has Jev rate each result from its title and description, and scrapes only the relevant ones. A `score` question takes a rubric ordered from 0, and returns the expected score, which can fall between levels. With three levels, a score of 1.5 or more leans toward "Directly answers the query".

```typescript theme={null}
import { Firecrawl, type SearchResultWeb } from 'firecrawl';
import { score, TypeSafeClient } from '@typesafe-ai/sdk';

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

const query = 'how to rotate Postgres credentials without downtime';
const search = await firecrawl.search(query, { limit: 10 });
const results = (search.web ?? []) as SearchResultWeb[];

const rated = await Promise.all(results.map(async (result) => {
    const { answers } = await typesafe.systemOne({
        state: { query, title: result.title ?? '', description: result.description ?? '' },
        questions: {
            relevance: score('How well this result answers the query', [
                'Unrelated to the query',
                'Related topic, but does not answer the query',
                'Directly answers the query'
            ])
        }
    });
    return { url: result.url, relevance: answers.relevance.score };
}));

const relevant = rated.filter((r) => r.relevance >= 1.5).map((r) => r.url);

if (relevant.length > 0) {
    const { data: pages } = await firecrawl.batchScrape(relevant, { options: { formats: ['markdown'] } });
    console.log(`Scraped ${pages.length} of ${results.length} results`);
}
```

## Qualify Leads

This example scrapes company homepages and sends each one to your CRM or a person for review. A `choice` question returns the selected label along with a `confidence`, so you can hand uncertain answers to a person instead of trusting them.

```typescript theme={null}
import { Firecrawl } from 'firecrawl';
import { choice, noul, TypeSafeClient } from '@typesafe-ai/sdk';

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

const companies = ['https://ramp.com', 'https://mercury.com', 'https://www.jpmorganchase.com'];
const { data: pages } = await firecrawl.batchScrape(companies, { options: { formats: ['markdown'] } });

const leads = await Promise.all(pages.map(async (page) => {
    const { answers } = await typesafe.systemOne({
        state: { homepage: page.markdown ?? '' },
        questions: {
            isFintech: noul('The company builds financial technology such as payments, banking, or spend management software'),
            stage: choice('How established the company appears to be', {
                startup: 'Early stage, with a small team or a single product',
                growth: 'Several products or a sizable customer base',
                enterprise: 'A large, long-established company'
            })
        }
    });

    const { choice: stage, confidence } = answers.stage;
    const qualified = answers.isFintech.noul > 0.8 && stage !== 'enterprise';
    const route = qualified && confidence >= 0.6 ? 'crm' : 'review';

    return { url: page.metadata?.sourceURL, stage, confidence, route };
}));

console.table(leads);
```

For more on question types and options, see the [TypeSafe docs](https://docs.typesafe.ai/).