# YC Company Directory Lookup

> YC Company Directory Lookup is a paid API for AI agents from api.companyrecords-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Searches the Y Combinator startup directory by company name or slug and returns batch, status, industry, team size, one-liner, website, and YC profile URL.

## Facts

- Endpoint: GET https://api.companyrecords-api.workers.dev/api/b2b/y-combinator?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/yc-company-directory-lookup-383d1f47
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JF9hRV6GOfTWeI6R1bUk4

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability yc-company-directory-lookup-383d1f47
```

Example prompt: Can you look up Airbnb in the Y Combinator company directory and tell me which batch they were in, their industry, team size, and current status?

## When to prefer this

Use this endpoint when you need structured YC-specific metadata about a startup — batch, status, industry, team size — and you know the company name or slug. Prefer this over general web search when you need machine-readable YC portfolio data or want to verify YC membership programmatically. It is not suitable for non-YC companies or for searching by founder name, location, or industry category alone.

## Known failure modes

- No results returned if company name doesn't match any YC portfolio company
- Misspelled or abbreviated names may return zero results — try the canonical company name or slug
- Data may be slightly stale as it reflects the last update of the community-maintained mirror, not real-time YC data
- Very new YC batches may not yet appear in the dataset
- Query string shorter than 2 characters or longer than 80 characters will be rejected

## How this service works

Pay-per-call company registry, government, legal and B2B data tools for AI agents, from official registers and public sources. Payment: x402, USDC on Base, Solana, Arc, Polygon, Arbitrum, Monad, World Chain, Optimism, Avalanche, Celo or Stellar, or RLUSD/XRP on the XRP Ledger. No signup, no API key; a failed call is not charged.

## Output

Returns a JSON object with the query string, result count, data source URL, and a results array containing each matched company's name, slug, YC batch (e.g. 'Winter 2012'), active/inactive status, website, industry category, hiring flag, one-liner description, team size, office locations, and direct YC profile URL. Also includes a dataAsOf timestamp indicating when the underlying dataset was last updated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "Company name or slug, 2 to 80 characters"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 1,
  "query": "circuithub",
  "source": "https://yc-oss.github.io/api/companies/all.json",
  "results": [
   {
    "name": "CircuitHub",
    "slug": "circuithub",
    "batch": "Winter 2012",
    "status": "Active",
    "website": "https://circuithub.com",
    "industry": "Industrials",
    "isHiring": true,
    "oneLiner": "On-Demand Electronics Manufacturing",
    "teamSize": 58,
    "locations": "London, England, United Kingdom",
    "profileUrl": "https://www.ycombinator.com/companies/circuithub"
   }
  ],
  "dataAsOf": "2026-10-23T08:10:12.454Z",
  "checkedAt": "2026-10-23T09:37:29.890Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/yc-company-directory-lookup-383d1f47/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.companyrecords-api.workers.dev](https://www.zero.xyz/host/api.companyrecords-api.workers.dev/llms.txt)