> ## Documentation Index
> Fetch the complete documentation index at: https://apidoc.cufinder.io/llms.txt
> Use this file to discover all available pages before exploring further.
# B2B Customers Finder API
> Knowing who buys from your competitors reveals targeting opportunities that firmographic filters alone cannot surface. The B2B Customers Finder API analyzes domain relationships across CUFinder's 85M+ company database to identify verified business customers of any target company, returning customer lists with confidence scores, company profiles, and relationship indicators that expose competitive whitespace. Built for market intelligence platforms, competitive analysis tools, and partnership mapping systems, this RESTful endpoint delivers customer relationship data—including company size, industry, location, and technology stack—that power competitor displacement strategies, market expansion planning, and strategic partnership identification workflows across your revenue operations.
export const ReadMore = ({link, children, className = ""}) => {
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## Common Use Cases
Knowing who a company already sells to opens the door to lookalike targeting and competitive plays.
* **Account-Based Marketing:** Building target lists of companies that already buy from a similar vendor.
* **Competitive Intelligence:** Mapping who a competitor sells to and where to win share.
* **Partner Sourcing:** Finding companies that fit an ideal customer profile for partnerships.
* **Sales Prospecting:** Feeding likely buyers straight into outbound campaigns.
* **Market Research:** Sizing a segment by the customers already active in it.
## B2B Customers Finder API Typescript SDK
```typescript Request theme={null}
import { Cufinder } from '@cufinder/cufinder-ts';
// Initialize the client
const client = new Cufinder('your-api-key-here');
// Initialize with more options
const client = new Cufinder('your-api-key-here', { timeout: 60000 });
const result = await client.bcd('stripe.com');
console.log(result);
```
## B2B Customers Finder API Python SDK
```python Request theme={null}
from cufinder import Cufinder
# Initialize the client
client = Cufinder('your-api-key-here')
# Initialize with more options
client = Cufinder('your-api-key-here', timeout=60)
result = client.bcd('stripe.com')
print(result)
```
## B2B Customers Finder API Go SDK
```go Request theme={null}
package main
import (
"fmt"
"log"
"github.com/cufinder/cufinder-go"
)
func main() {
// Initialize the client
sdk := cufinder.NewSDK("your-api-key-here")
// Initialize with more options
sdk := cufinder.NewSDKWithConfig(cufinder.ClientConfig{
APIKey: "your-api-key-here",
BaseURL: "https://api.cufinder.io/v2",
Timeout: 60 * time.Second,
MaxRetries: 3,
})
}
result, err := sdk.BCD("stripe.com")
if err != nil {
log.Fatal(err)
}
fmt.Println(result)
```
## B2B Customers Finder API Ruby SDK
```ruby Request theme={null}
require 'cufinder_ruby'
# Initialize the client
client = Cufinder::Client.new(api_key: 'your-api-key-here')
# Initialize with more options
client = Cufinder::Client.new(
api_key: 'your-api-key-here',
timeout: 60,
max_retries: 3
)
result = client.bcd(url: "stripe.com")
puts result
```
## B2B Customers Finder API Rust SDK
```rust Request theme={null}
use cufinder_rust::CufinderSDK;
#[tokio::main]
async fn main() -> Result<(), Box> {
// Initialize the client
let sdk = CufinderSDK::new("your-api-key-here".to_string())?;
// Initialize with more options
let sdk = CufinderSDK::with_config(ClientConfig {
api_key: "your-api-key-here".to_string(),
base_url: "https://api.cufinder.io/v2".to_string(),
timeout: Duration::from_secs(60),
max_retries: 3,
})?;
Ok(())
}
let result = sdk.bcd("stripe.com").await?;
println!("{:?}", result);
```
## Related APIs
Discover companies similar to a target.
Search companies with multiple filters.
Enrich a company with full firmographics.
Search 1B+ profiles with combined filters.