# Y Combinator Founders Dataset with Emails

Every Y Combinator founder from 2020 to Fall 2026 batches in one run, free: name, title, work email, company, batch, one-liner, industry, location, status, LinkedIn, Twitter and website.

**Pricing:** $0 per founder

**Endpoint:** `POST /v1/data/ycombinator/founders-dataset/run`

**Auth:** `Authorization: Bearer mk_live_...`

## Parameters

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `batch` | string | No | YC batch, e.g. `W25` or `Winter 2025`. |
| `maxResults` | integer | No | Stop after this many founders. Omitted means the whole dataset (about 9,000 rows). |

## Example

`?wait=true` holds the request open until the run finishes (up to 60s) and returns the rows inline — one request, no polling.

```bash
curl -X POST "https://api.mindcase.co/v1/data/ycombinator/founders-dataset/run?wait=true" \
  -H "Authorization: Bearer mk_live_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"params":{}}'
```

```python
import requests

resp = requests.post(
    "https://api.mindcase.co/v1/data/ycombinator/founders-dataset/run",
    params={"wait": "true"},
    headers={"Authorization": "Bearer mk_live_YOUR_API_KEY"},
    json={"params": {}},
)
rows = resp.json()["data"]
```

## Longer runs

If the run is still going at the 60s ceiling you get back `{ job_id, status: "running" }` instead of rows (same if the result is over 100 rows — those come back `truncated`). Poll with that `job_id`:

```bash
# 1) check status
curl https://api.mindcase.co/v1/jobs/JOB_ID \
  -H "Authorization: Bearer mk_live_YOUR_API_KEY"

# 2) when status == completed, fetch the rows
curl https://api.mindcase.co/v1/jobs/JOB_ID/results \
  -H "Authorization: Bearer mk_live_YOUR_API_KEY"
```

Full API reference (auth, jobs, balance, SDKs, MCP): https://mindcase.co/skills.md

## Response columns

| Field | Display name | Type |
|-------|--------------|------|
| `urlSlug` | URL Slug | text |
| `fullName` | Full Name | text |
| `title` | Title | text |
| `currentCompany` | Current Company | text |
| `email` | Email | text |
| `companyBatch` | Company Batch | text |
| `companyBatchName` | Company Batch Name | text |
| `companyOneLiner` | Company One Liner | text |
| `ycParentIndustries` | YC Parent Industries | array |
| `companyTeamSize` | Company Team Size | number |
| `companyLocation` | Company Location | text |
| `companyCountry` | Company Country | text |
| `companyYcdcStatus` | Company YCDC Status | text |
| `linkedinUrl` | Linkedin URL | url |
| `twitterUrl` | Twitter URL | url |
| `companyWebsite` | Company Website | url |
| `companyLinkedinUrl` | Company Linkedin URL | url |
| `ycUrl` | YC URL | url |
| `companyUrl` | Company URL | url |