How Long Can a Search Regex Be?

There is not a maximum length for individual parameters of a search query; rather, there is a maximum length for the entire query. This length is 4094 characters. You may allocate the characters between the fields any way you like, so the fewer parameters you have, and the shorter most of them are, the longer one single regex can be.

To give you a visual idea, here's a query that's about as long as it's allowed to be. Any longer, and it would fail.

import json, os, requests

api_key = os.environ['PROXYCURL_API_KEY']
headers = {'Authorization': 'Bearer ' + api_key}

company_endpoint = 'https://nubela.co/proxycurl/api/search/company'
params = {
    'employee_count_max': '1250',
    'industry': 'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing|Medical Equipment Manufacturing|'
                'Medical Equipment Manufacturing',
    'enrich_profiles': 'enrich',
    'page_size': '1'
}
response = requests.get(company_endpoint, params=params, headers=headers)
print(json.dumps(response.json()))