# Hunter Discover Companies

> Hunter Discover Companies is a paid API for AI agents from Hunter at hunter.mpp.paywithlocus.com, paid per call via MPP, $0.008/call, status unknown (last checked 2026-10-12, last successful call 2026-04-29).

Searches and filters a database of companies by industry, size, technology, location, or similarity to discover relevant organizations for outreach and lead generation.

## Facts

- Endpoint: POST https://hunter.mpp.paywithlocus.com/hunter/discover?utm_source=zero.xyz
- Price: $0.008/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-12
- Last successful call: 2026-04-29
- Success rate: 100% of calls made through Zero
- Activations on Zero: 2
- Provider: Hunter
- Docs: https://hunter.io/api-documentation/v2
- Website: https://hunter.io
- Tags: email, verification, enrichment, outreach, data
- Canonical page: https://www.zero.xyz/c/hunter-discover-f4111998
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ho-sBTo2v5WUQjGOseJQd

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 hunter-discover-f4111998 -d '<json body>'
```

Example prompt: Can you find me up to 20 private SaaS companies headquartered in San Francisco with 11-50 employees that use Salesforce, focused on fintech?

## When to prefer this

Use this endpoint when you need to discover and filter companies based on structured criteria like industry, size, location, or technology — especially for building prospect lists or finding similar companies. Prefer this over Domain Search (which retrieves email contacts for a known domain) or Company Enrichment (which requires a known company). Best for top-of-funnel research when you don't yet know specific target companies.

## Known failure modes

- No matching companies found for the given filters — returns empty results
- Invalid headcount format (e.g. not '1-10' or '11-50') causes a validation error
- Unknown or unsupported technology/industry values may return no results
- Rate limit exceeded returns an error response
- Malformed query string may return unexpected or empty results

## How this service works

Search for companies matching specific criteria like industry, size, location, and technology stack.

## Output

A list of matching companies with profile metadata such as company name, domain, industry, employee count, company type, and headquarters location, paginated according to the limit and offset provided.

## Example request

```json
{
 "limit": 10,
 "query": "software development",
 "offset": 0,
 "industry": "Technology",
 "headcount": "11-50",
 "technology": "cloud computing",
 "company_type": "private",
 "headquarters_location": "Austin"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "number",
   "description": "Max results (default 10)"
  },
  "query": {
   "type": "string",
   "description": "Free-text search query"
  },
  "offset": {
   "type": "number",
   "description": "Offset for pagination"
  },
  "industry": {
   "type": "string",
   "description": "Filter by industry"
  },
  "keywords": {
   "type": "string",
   "description": "Filter by keywords"
  },
  "headcount": {
   "type": "string",
   "description": "Filter by employee count range (e.g. '1-10', '11-50')"
  },
  "similar_to": {
   "type": "string",
   "description": "Find companies similar to this domain"
  },
  "technology": {
   "type": "string",
   "description": "Filter by technology used"
  },
  "company_type": {
   "type": "string",
   "description": "Filter by type: 'public', 'private', 'nonprofit'"
  },
  "organization": {
   "type": "string",
   "description": "Organization name to search"
  },
  "headquarters_location": {
   "type": "string",
   "description": "Filter by headquarters location"
  }
 },
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hunter-discover-f4111998/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from hunter.mpp.paywithlocus.com](https://www.zero.xyz/host/hunter.mpp.paywithlocus.com/llms.txt)