# Subfinder: find subdomains through a data provider



Find subdomains through a data provider.



## 1. Run the example



[Download the Subfinder example](https://www.security.run/docs/examples/subfinder.zip). Extract it, install `httpx`, set your API URL and token, then run `python client.py`. The client uploads the included inputs, submits the command, and saves the result under `results/RUN_ID`.



## 2. Check the result



Read domains.jsonl for names returned by the isolated provider simulator.



Read the native exit code and cleanup status printed by the client. [Read results and save reports](https://www.security.run/docs/visibility.html) explains the returned files.



## 3. Use your own inputs



Edit `example.json` to change the command arguments, requested outputs or deadline. Replace the files under `inputs/` with your own data, keeping the staged paths aligned with the command. The client creates the artifact IDs for you; illustrative IDs shown here must not be copied into a live request.



### Files used by this example



- `provider-ca.crt`



This example selects the isolated `crtsh-fixture` target. To use a reachable target of your own, change the target arguments or driver and remove `target_profile`. See [Run a check against a target](https://www.security.run/docs/targets.html) for network setup.



Qualified version: `2.17.0`. Commands: `subfinder`.



- Passive enumeration needs reachable data providers, optionally with provider API credentials. A caller-supplied proxy can be used within the selected target namespace.



Inspect `GET /v1/tools/subfinder` for the current installed version and readiness. The published snapshot has 1 functional case(s), plus timeout and cancellation checks. These examples demonstrate the native path; other flags and inputs are supported within the tool’s runtime limits.

## Command submitted by the example

```json
{
  "tool": "subfinder",
  "timeout_seconds": 90,
  "invocation": {
    "args": [
      "-d",
      "fixture.securityrun.test",
      "-sources",
      "crtsh",
      "-proxy",
      "http://127.0.0.1:8080",
      "-json",
      "-silent",
      "-duc",
      "-timeout",
      "5",
      "-o",
      "domains.jsonl"
    ],
    "outputs": [
      "domains.jsonl"
    ],
    "success_exit_codes": [
      0
    ],
    "environment": {
      "SSL_CERT_FILE": "/tmp/work/provider-ca.crt"
    },
    "executable": "subfinder",
    "files": [
      {
        "path": "provider-ca.crt",
        "artifact_id": "artifact_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
        "executable": false
      }
    ]
  },
  "target_profile": "crtsh-fixture"
}
```