Search for Companies

The Company Search API lets you search MoltSets’ company database by name, domain, industry, employee count, or annual revenue, so you can find and qualify target accounts.

Use query for free text company name search, domain for an exact lookup by website domain, and the filters (industry, employee_range, revenue_range) to narrow your results. Combining query with filters gives the most precise matches. Every result comes back ranked, with a higher _score meaning a stronger match.

The exclude_* parameters (exclude_domain, exclude_industry, exclude_employee_range, exclude_revenue_range) work the other way round: each one takes a list and removes matches rather than selecting them. exclude_domain is how you suppress accounts you already have. Exclusions narrow a search but cannot be the whole search — you still need at least one positive input.

Use this endpoint to:

Build prospect lists for account-based marketing
Qualify target accounts before outreach
Enrich CRM records with firmographic data

Fair Use Policy: This API is subject to our Fair Use Policy for Search.

POST

search_companies

Search for Companies

curl --request POST \
  --url https://api.moltsets.com/api/v1/tools/search_companies \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "industry": "Information Technology",
  "employee_range": "51-200",
  "revenue_range": "$10M - $20M",
  "exclude_domain": [
    "acme.com",
    "stripe.com"
  ],
  "limit": 10,
  "offset": 0
}
'

import requests

url = "https://api.moltsets.com/api/v1/tools/search_companies"

payload = {
    "industry": "Information Technology",
    "employee_range": "51-200",
    "revenue_range": "$10M - $20M",
    "exclude_domain": ["acme.com", "stripe.com"],
    "limit": 10,
    "offset": 0
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    industry: 'Information Technology',
    employee_range: '51-200',
    revenue_range: '$10M - $20M',
    exclude_domain: ['acme.com', 'stripe.com'],
    limit: 10,
    offset: 0
  })
};

fetch('https://api.moltsets.com/api/v1/tools/search_companies', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.moltsets.com/api/v1/tools/search_companies",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'industry' => 'Information Technology',
    'employee_range' => '51-200',
    'revenue_range' => '$10M - $20M',
    'exclude_domain' => [
        'acme.com',
        'stripe.com'
    ],
    'limit' => 10,
    'offset' => 0
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.moltsets.com/api/v1/tools/search_companies"

	payload := strings.NewReader("{\n  \"industry\": \"Information Technology\",\n  \"employee_range\": \"51-200\",\n  \"revenue_range\": \"$10M - $20M\",\n  \"exclude_domain\": [\n    \"acme.com\",\n    \"stripe.com\"\n  ],\n  \"limit\": 10,\n  \"offset\": 0\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.moltsets.com/api/v1/tools/search_companies")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"industry\": \"Information Technology\",\n  \"employee_range\": \"51-200\",\n  \"revenue_range\": \"$10M - $20M\",\n  \"exclude_domain\": [\n    \"acme.com\",\n    \"stripe.com\"\n  ],\n  \"limit\": 10,\n  \"offset\": 0\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.moltsets.com/api/v1/tools/search_companies")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"industry\": \"Information Technology\",\n  \"employee_range\": \"51-200\",\n  \"revenue_range\": \"$10M - $20M\",\n  \"exclude_domain\": [\n    \"acme.com\",\n    \"stripe.com\"\n  ],\n  \"limit\": 10,\n  \"offset\": 0\n}"

response = http.request(request)
puts response.read_body

{
  "results": {
    "results": [
      {
        "name": "Moltsets",
        "domain": "moltsets.com",
        "industry": "Information Technology",
        "linkedin_url": "linkedin.com/company/moltsets-contact-data",
        "revenue_range": "$1M - $5M",
        "employee_count": "5",
        "employee_range": "1-10",
        "city": "San Carlos",
        "state": "California",
        "country": "United States",
        "naics_codes": [
          "5112",
          "51121",
          "511210"
        ],
        "naics_titles": [
          "Software Publishers"
        ],
        "linkedin_industry": [
          "Software Development"
        ],
        "logo_url": "https://cdn.mixrank.com/md5/48188bb7d0df12849cabfeea895243ae",
        "_id": "moltsets.com",
        "_score": 18.4271
      },
      {
        "name": "Acme Infolabs",
        "domain": "acmeinfolabs.com",
        "industry": "Information Technology",
        "linkedin_url": "linkedin.com/company/acmeinfolabs",
        "revenue_range": "$20M - $50M",
        "employee_count": "57",
        "employee_range": "51-200",
        "city": "Bengaluru",
        "state": "Karnataka",
        "country": "India",
        "naics_codes": [
          "5415",
          "54151",
          "541511",
          "541519"
        ],
        "naics_titles": [
          "Computer Systems Design and Related Services",
          "Custom Computer Programming Services",
          "Other Computer Related Services"
        ],
        "linkedin_industry": [
          "IT Services and IT Consulting"
        ],
        "logo_url": "https://cdn.mixrank.com/md5/0e4e81c8ff584b1ce3e4c3067e8cb033",
        "_id": "acmeinfolabs.com",
        "_score": 15.0141
      },
      {
        "name": "Acme Inc",
        "domain": "atmexpressfinancial.com",
        "industry": "Information Technology",
        "linkedin_url": "linkedin.com/company/acme-inc",
        "revenue_range": "Above $50M",
        "employee_count": "150",
        "employee_range": "51-200",
        "city": "Denver",
        "state": "Colorado",
        "country": "United States",
        "_id": "atmexpressfinancial.com",
        "_score": 15.0141
      }
    ],
    "total": 210
  },
  "status": "ok",
  "metadata": {
    "fair_use": {
      "records_remaining_5h": 89999,
      "records_reset_5h": "2026-08-25T15:46:15Z",
      "records_remaining_1w": 300423,
      "records_reset_1w": "2026-08-30T08:00:07Z"
    }
  }
}

{
  "error": "Bad Request",
  "message": "The server cannot process the request due to a client error (400 Bad Request)."
}

{
  "error": "Unauthorized",
  "message": "Invalid API key."
}

{
  "error": "Not Found",
  "message": "No match was found for the data provided."
}

{
  "error": "Invalid Input",
  "message": "Message describing the nature of the invalid input."
}

{
  "error": "Too Many Requests",
  "message": "Rate limit exceeded. Maximum 100 requests per second."
}

{
  "error": {
    "code": "internal_error",
    "message": "Unexpected connection error."
  },
  "metadata": {}
}

Authorizations

Authorization

string

header

required

Pass your API key as a Bearer token. Keys follow the format ms_XXXXXXXXXXX.

Body

application/json

query

string

Full-text search across company name only. Do not put domain, industry, employee size, or revenue here — use the dedicated filter params for those.

domain

string

Exact company domain filter. Full URLs are normalised automatically ("https://www.acme.com/about" → "acme.com"), so there is no need to strip the protocol or path yourself. Prefer this over query when you know the domain, since it is a precise match rather than a text search.

Example:

"moltsets.com"

industry

enum<string>

Exact industry filter. These 22 buckets are the only supported values, and must match exactly, including capitalisation and punctuation (note the ampersand in "Marketing & Advertising"). For a niche the buckets cannot express — insurance carriers, aerospace, mining — use linkedin_industry instead.

Available options:

Professional and Business Services,

Information Technology,

Manufacturing,

Retail,

Health and Pharmaceuticals,

Creative Arts and Entertainment,

Construction,

Marketing & Advertising,

Finance and Banking,

Tourism and Hospitality,

Non-Profit and Social Services,

Food and Beverage,

Real Estate,

Education,

Transportation and Logistics,

Media and Publishing,

Energy,

Government and Public Administration,

Automotive,

Telecommunications,

Agriculture,

Utilities

employee_range

enum<string>

Exact employee count range filter. These eight numeric bands are the only supported values — "1-10" holds the most records by a wide margin, "5001+" the fewest.

Available options:

1-10,

11-20,

21-50,

51-200,

201-500,

501-1000,

1001-5000,

5001+

revenue_range

enum<string>

Exact annual revenue range filter. These seven bands are the only supported values — "$500k - $1M" is the most common. "Above $50M" is a flat catch-all for all revenue over $50M; there is no finer band above it, so use it for any large-enterprise revenue target.

Available options:

Below $500k,

$500k - $1M,

$1M - $5M,

$5M - $10M,

$10M - $20M,

$20M - $50M,

Above $50M

naics_code

string

Exact NAICS industry code filter (~50% filled). Works at any level of the hierarchy, from the 2-digit sector ("23" = Construction, "54" = Professional Services) through to the 6-digit national industry ("541120" = Offices of Notaries, "511210" = Software Publishers). Use a short code for broad industry targeting and a longer code for precision — the most standardised industry filter available.

Example:

"541120"

linkedin_industry

string

Exact LinkedIn industry label filter (~85% filled). Uses LinkedIn's own industry vocabulary, which is far finer-grained than the 22 buckets in industry. Must match the stored label exactly, with standard capitalisation — for example "Software Development", "Hospitality", "Legal Services", "Staffing and Recruiting", "Wellness and Fitness Services".

Example:

"Software Development"

country

string

Exact country name filter on the company's location. Use the full English country name. Note that company location is derived from where the company's team is based: this is accurate for the small companies that dominate the index, but large multinationals are attributed to a single one of their offices — combine it with other filters rather than relying on location alone when targeting global companies.

Example:

"United States"

state

string

Exact state or region name filter on the company's location. Full names with standard capitalisation ("Texas", not "TX"). Combine with country for precision. Location is team-derived in the same way as country, so it is most accurate for smaller companies.

Example:

"Texas"

exclude_domain

string[]

Company domains to exclude. Any company on this list is dropped from the results — this is the suppression list, so pass the accounts you already have (existing customers, current vendors, your own company) and they never come back. Full URLs are normalised automatically, exactly as with domain. Excluded records cost you nothing: they consume no tokens and no fair use records, so excluding here is always cheaper than filtering the results yourself.

Example:

["acme.com", "stripe.com"]

exclude_industry

string[]

Industries to exclude. Companies in any listed industry are dropped. Accepts the same values as industry. Exclusion only removes companies that positively carry one of these values, so companies with no industry on record still appear in your results.

Example:

[
  "Education",
  "Non-Profit and Social Services"
]

exclude_employee_range

string[]

Employee count bands to exclude. Companies in any listed band are dropped. Accepts the same values as employee_range — for example ["1-10", "11-20"] to skip the very smallest companies, or ["5001+"] to skip enterprises.

Example:

["1-10", "11-20"]

exclude_revenue_range

string[]

Revenue bands to exclude. Companies in any listed band are dropped. Accepts the same values as revenue_range — for example ["Below $500k"] to skip the smallest companies, or ["Above $50M"] to skip large enterprises.

Example:

["Below $500k"]

limit

integer

default:10

Number of results to return (default: 10, max: 25).

Required range: 1 <= x <= 25

offset

integer

default:0

Number of results to skip for pagination (default: 0). Use with limit to page through results — e.g. offset: 10 to get the second page of 10 results.

Response

Success

Search for Companies

curl --request POST \
  --url https://api.moltsets.com/api/v1/tools/search_companies \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "industry": "Information Technology",
  "employee_range": "51-200",
  "revenue_range": "$10M - $20M",
  "exclude_domain": [
    "acme.com",
    "stripe.com"
  ],
  "limit": 10,
  "offset": 0
}
'

import requests

url = "https://api.moltsets.com/api/v1/tools/search_companies"

payload = {
    "industry": "Information Technology",
    "employee_range": "51-200",
    "revenue_range": "$10M - $20M",
    "exclude_domain": ["acme.com", "stripe.com"],
    "limit": 10,
    "offset": 0
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    industry: 'Information Technology',
    employee_range: '51-200',
    revenue_range: '$10M - $20M',
    exclude_domain: ['acme.com', 'stripe.com'],
    limit: 10,
    offset: 0
  })
};

fetch('https://api.moltsets.com/api/v1/tools/search_companies', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.moltsets.com/api/v1/tools/search_companies",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'industry' => 'Information Technology',
    'employee_range' => '51-200',
    'revenue_range' => '$10M - $20M',
    'exclude_domain' => [
        'acme.com',
        'stripe.com'
    ],
    'limit' => 10,
    'offset' => 0
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.moltsets.com/api/v1/tools/search_companies"

	payload := strings.NewReader("{\n  \"industry\": \"Information Technology\",\n  \"employee_range\": \"51-200\",\n  \"revenue_range\": \"$10M - $20M\",\n  \"exclude_domain\": [\n    \"acme.com\",\n    \"stripe.com\"\n  ],\n  \"limit\": 10,\n  \"offset\": 0\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.moltsets.com/api/v1/tools/search_companies")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"industry\": \"Information Technology\",\n  \"employee_range\": \"51-200\",\n  \"revenue_range\": \"$10M - $20M\",\n  \"exclude_domain\": [\n    \"acme.com\",\n    \"stripe.com\"\n  ],\n  \"limit\": 10,\n  \"offset\": 0\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.moltsets.com/api/v1/tools/search_companies")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"industry\": \"Information Technology\",\n  \"employee_range\": \"51-200\",\n  \"revenue_range\": \"$10M - $20M\",\n  \"exclude_domain\": [\n    \"acme.com\",\n    \"stripe.com\"\n  ],\n  \"limit\": 10,\n  \"offset\": 0\n}"

response = http.request(request)
puts response.read_body

{
  "results": {
    "results": [
      {
        "name": "Moltsets",
        "domain": "moltsets.com",
        "industry": "Information Technology",
        "linkedin_url": "linkedin.com/company/moltsets-contact-data",
        "revenue_range": "$1M - $5M",
        "employee_count": "5",
        "employee_range": "1-10",
        "city": "San Carlos",
        "state": "California",
        "country": "United States",
        "naics_codes": [
          "5112",
          "51121",
          "511210"
        ],
        "naics_titles": [
          "Software Publishers"
        ],
        "linkedin_industry": [
          "Software Development"
        ],
        "logo_url": "https://cdn.mixrank.com/md5/48188bb7d0df12849cabfeea895243ae",
        "_id": "moltsets.com",
        "_score": 18.4271
      },
      {
        "name": "Acme Infolabs",
        "domain": "acmeinfolabs.com",
        "industry": "Information Technology",
        "linkedin_url": "linkedin.com/company/acmeinfolabs",
        "revenue_range": "$20M - $50M",
        "employee_count": "57",
        "employee_range": "51-200",
        "city": "Bengaluru",
        "state": "Karnataka",
        "country": "India",
        "naics_codes": [
          "5415",
          "54151",
          "541511",
          "541519"
        ],
        "naics_titles": [
          "Computer Systems Design and Related Services",
          "Custom Computer Programming Services",
          "Other Computer Related Services"
        ],
        "linkedin_industry": [
          "IT Services and IT Consulting"
        ],
        "logo_url": "https://cdn.mixrank.com/md5/0e4e81c8ff584b1ce3e4c3067e8cb033",
        "_id": "acmeinfolabs.com",
        "_score": 15.0141
      },
      {
        "name": "Acme Inc",
        "domain": "atmexpressfinancial.com",
        "industry": "Information Technology",
        "linkedin_url": "linkedin.com/company/acme-inc",
        "revenue_range": "Above $50M",
        "employee_count": "150",
        "employee_range": "51-200",
        "city": "Denver",
        "state": "Colorado",
        "country": "United States",
        "_id": "atmexpressfinancial.com",
        "_score": 15.0141
      }
    ],
    "total": 210
  },
  "status": "ok",
  "metadata": {
    "fair_use": {
      "records_remaining_5h": 89999,
      "records_reset_5h": "2026-08-25T15:46:15Z",
      "records_remaining_1w": 300423,
      "records_reset_1w": "2026-08-30T08:00:07Z"
    }
  }
}

{
  "error": "Bad Request",
  "message": "The server cannot process the request due to a client error (400 Bad Request)."
}

{
  "error": "Unauthorized",
  "message": "Invalid API key."
}

{
  "error": "Not Found",
  "message": "No match was found for the data provided."
}

{
  "error": "Invalid Input",
  "message": "Message describing the nature of the invalid input."
}

{
  "error": "Too Many Requests",
  "message": "Rate limit exceeded. Maximum 100 requests per second."
}

{
  "error": {
    "code": "internal_error",
    "message": "Unexpected connection error."
  },
  "metadata": {}
}

Search

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Reverse Lookups

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Account

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Authorizations

Body

Response