Zerobounce

Ruby client for Zerobounce.net API. Developed based on this version by Aaron Frase.

Usage

Add this line to your application's Gemfile:

gem 'zerobounce-sdk'

And then execute:

$bundle

Or install it yourself as:

$gem install zerobounce-sdk

Import

require 'zerobounce'

Set a valid ZeroBounce API key.

Zerobounce.configure do |config|
  config.apikey = '<zerobounce-api-key>'
  ...
end

or

Zerobounce.config.apikey = '<zerobounce-api-key>'
...

Credits

Zerobounce.credits
=> 79   # returns -1 for invalid key

Activity

Zerobounce.activity('[email protected]')
=> {"found"=>true, "active_in_days"=>"180"}

Usage statistics

Zerobounce.api_usage(Date.today, Date.today)
=>
{"total"=>0,
 "status_valid"=>0,
 "status_invalid"=>0,
 "status_catch_all"=>0,
 "status_do_not_mail"=>0,
 "status_spamtrap"=>0,
 "status_unknown"=>0,
 "sub_status_toxic"=>0,
 "sub_status_disposable"=>0,
 "sub_status_role_based"=>0,
 "sub_status_possible_trap"=>0,
 "sub_status_global_suppression"=>0,
 "sub_status_timeout_exceeded"=>0,
 "sub_status_mail_server_temporary_error"=>0,
 "sub_status_mail_server_did_not_respond"=>0,
 "sub_status_greylisted"=>0,
 "sub_status_antispam_system"=>0,
 "sub_status_does_not_accept_mail"=>0,
 "sub_status_exception_occurred"=>0,
 "sub_status_failed_syntax_check"=>0,
 "sub_status_mailbox_not_found"=>0,
 "sub_status_unroutable_ip_address"=>0,
 "sub_status_possible_typo"=>0,
 "sub_status_no_dns_entries"=>0,
 "sub_status_role_based_catch_all"=>0,
 "sub_status_mailbox_quota_exceeded"=>0,
 "sub_status_forcible_disconnect"=>0,
 "sub_status_failed_smtp_connection"=>0,
 "sub_status_mx_forward"=>0,
 "sub_status_alternate"=>0,
 "sub_status_blocked"=>0,
 "sub_status_allowed"=>0,
 "start_date"=>"4/28/2023",
 "end_date"=>"4/28/2023"}

Email Validation

Validate single eMail

Zerobounce.validate('[email protected]')
# Zerobounce.validate('[email protected]', '192.168.0.1') # optional IP address
=>
{"address"=>"[email protected]",
 "status"=>"valid",
 "sub_status"=>"",
 "free_email"=>false,
 "did_you_mean"=>nil,
 "account"=>nil,
 "domain"=>nil,
 "domain_age_days"=>"9692",
 "smtp_provider"=>"example",
 "mx_found"=>"true",
 "mx_record"=>"mx.example.com",
 "firstname"=>"zero",
 "lastname"=>"bounce",
 "gender"=>"male",
 "country"=>nil,
 "region"=>nil,
 "city"=>nil,
 "zipcode"=>nil,
 "processed_at"=>"2023-04-28 15:18:45.631"}

Validate batch

emails
=>
["[email protected]",
 "[email protected]",
 "[email protected]",
 "[email protected]",
 "[email protected]",
 "[email protected]"]

# ip_addresses
=> ["192.168.0.1", "192.168.0.1", "192.168.0.1", "192.168.0.1", "192.168.0.1", "192.168.0.1"]
# Zerobounce.validate_batch(emails, ip_addresses) # optional ip_addresses parameter

Zerobounce.validate_batch(emails)
=>
[{"address"=>"[email protected]",
  "status"=>"do_not_mail",
  "sub_status"=>"disposable",
  "free_email"=>false,
  "did_you_mean"=>nil,
  "account"=>nil,
  "domain"=>nil,
  "domain_age_days"=>"9692",
  "smtp_provider"=>"example",
  "mx_found"=>"true",
  "mx_record"=>"mx.example.com",
  "firstname"=>"zero",
  "lastname"=>"bounce",
  "gender"=>"male",
  "country"=>nil,
  "region"=>nil,
  "city"=>nil,
  "zipcode"=>nil,
  "processed_at"=>"2023-04-28 15:21:44.340"},
 {"address"=>"[email protected]",
  "status"=>"invalid",
  "sub_status"=>"mailbox_not_found",
  "free_email"=>false,
  "did_you_mean"=>nil,
  "account"=>nil,
  "domain"=>nil,
  "domain_age_days"=>"9692",
  "smtp_provider"=>"example",
  "mx_found"=>"true",
  "mx_record"=>"mx.example.com",
  "firstname"=>"zero",
  "lastname"=>"bounce",
  "gender"=>"male",
  "country"=>nil,
  "region"=>nil,
  "city"=>nil,
  "zipcode"=>nil,
  "processed_at"=>"2023-04-28 15:21:44.340"},
 {"address"=>"[email protected]",
  "status"=>"valid",
  "sub_status"=>"",
  "free_email"=>false,
  "did_you_mean"=>nil,
  "account"=>nil,
  "domain"=>nil,
  "domain_age_days"=>"9692",
  "smtp_provider"=>"example",
  "mx_found"=>"true",
  "mx_record"=>"mx.example.com",
  "firstname"=>"zero",
  "lastname"=>"bounce",
  "gender"=>"male",
  "country"=>nil,
  "region"=>nil,
  "city"=>nil,
  "zipcode"=>nil,
  "processed_at"=>"2023-04-28 15:21:44.340"},
 {"address"=>"[email protected]",
  "status"=>"do_not_mail",
  "sub_status"=>"toxic",
  "free_email"=>false,
  "did_you_mean"=>nil,
  "account"=>nil,
  "domain"=>nil,
  "domain_age_days"=>"9692",
  "smtp_provider"=>"example",
  "mx_found"=>"true",
  "mx_record"=>"mx.example.com",
  "firstname"=>"zero",
  "lastname"=>"bounce",
  "gender"=>"male",
  "country"=>nil,
  "region"=>nil,
  "city"=>nil,
  "zipcode"=>nil,
  "processed_at"=>"2023-04-28 15:21:44.340"},
 {"address"=>"[email protected]",
  "status"=>"do_not_mail",
  "sub_status"=>"role_based",
  "free_email"=>false,
  "did_you_mean"=>nil,
  "account"=>nil,
  "domain"=>nil,
  "domain_age_days"=>"9692",
  "smtp_provider"=>"example",
  "mx_found"=>"true",
  "mx_record"=>"mx.example.com",
  "firstname"=>"zero",
  "lastname"=>"bounce",
  "gender"=>"male",
  "country"=>nil,
  "region"=>nil,
  "city"=>nil,
  "zipcode"=>nil,
  "processed_at"=>"2023-04-28 15:21:44.340"},
 {"address"=>"[email protected]",
  "status"=>"spamtrap",
  "sub_status"=>"",
  "free_email"=>false,
  "did_you_mean"=>nil,
  "account"=>nil,
  "domain"=>nil,
  "domain_age_days"=>"9692",
  "smtp_provider"=>"example",
  "mx_found"=>"true",
  "mx_record"=>"mx.example.com",
  "firstname"=>"zero",
  "lastname"=>"bounce",
  "gender"=>"male",
  "country"=>nil,
  "region"=>nil,
  "city"=>nil,
  "zipcode"=>nil,
  "processed_at"=>"2023-04-28 15:21:44.340"}]

Batch File Validation

Send file

# sample file can be found in the files folder of this repository
 validate_file_path = File.join(Dir.pwd, 'files', 'validation.csv')
=> "/home/zb/wrappers/ruby-test/files/validation.csv"
 Zerobounce.validate_file_send(validate_file_path)
=>
{"success"=>true,
 "message"=>"File Accepted",
 "file_name"=>"validation.csv",
 "file_id"=>"75d854a6-565c-49f9-b4c8-b3344480ec4c"}
 # file_id will be required for next steps
 # optional named parameters:
    email_address_column: 1,
    first_name_column: 2,
    last_name_column: 3,
    gender_column: 4,
    has_header_row: true,
    return_url: nil         # results callback url
 # Zerobounce.validate_file_send(validate_file_path, email_address_column: 1, gender_column: 4)

Check file

file_id = "75d854a6-565c-49f9-b4c8-b3344480ec4c"
=> "75d854a6-565c-49f9-b4c8-b3344480ec4c"
Zerobounce.validate_file_check(file_id)
=>
{"success"=>true,
 "file_id"=>"75d854a6-565c-49f9-b4c8-b3344480ec4c",
 "file_name"=>"validation.csv",
 "upload_date"=>"2023-04-28T15:25:41Z",
 "file_status"=>"Greylisted",
 "complete_percentage"=>"0%",
 "error_reason"=>nil,
 "return_url"=>nil}

Get file

file_id = "75d854a6-565c-49f9-b4c8-b3344480ec4c"
=> "75d854a6-565c-49f9-b4c8-b3344480ec4c"
Zerobounce.validate_file_get(file_id)
=> "\"email\",\"first\",\"last\",\"gender\",\"ip\",\"ZB Status\",\"ZB Sub Status\",\"ZB Account\",\"ZB Domain\",\"ZB First Name\",\"ZB Last Name\",\"ZB Gender\",\"ZB Free Email\",\"ZB MX Found\",\"ZB MX Record\",\"ZB SMTP Provider\",\"ZB Did You Mean\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"do_not_mail\",\"disposable\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"invalid\",\"mailbox_not_found\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"valid\",\"\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"do_not_mail\",\"toxic\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"do_not_mail\",\"role_based\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"spamtrap\",\"\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"abuse\",\"\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"unknown\",\"mail_server_temporary_error\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"catch-all\",\"\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"unknown\",\"antispam_system\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"invalid\",\"does_not_accept_mail\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"unknown\",\"exception_occurred\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"unknown\",\"failed_smtp_connection\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"invalid\",\"failed_syntax_check\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"unknown\",\"forcible_disconnect\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"do_not_mail\",\"global_suppression\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"unknown\",\"greylisted\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"valid\",\"leading_period_removed\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"unknown\",\"mail_server_did_not_respond\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"unknown\",\"mail_server_temporary_error\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"invalid\",\"mailbox_quota_exceeded\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"invalid\",\"mailbox_not_found\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"invalid\",\"no_dns_entries\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"do_not_mail\",\"possible_trap\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"invalid\",\"possible_typo\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"do_not_mail\",\"role_based\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"unknown\",\"timeout_exceeded\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"invalid\",\"unroutable_ip_address\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"valid\",\"\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"True\",\"true\",\"mx.example.com\",\"example\",\"\"\n\"[email protected]\",\"First\",\"Last\",\"male\",\"127.0.0.1\",\"do_not_mail\",\"role_based_catch_all\",\"\",\"\",\"zero\",\"bounce\",\"male\",\"False\",\"true\",\"mx.example.com\",\"example\",\"\"\n"

Delete file

file_id = "75d854a6-565c-49f9-b4c8-b3344480ec4c"
=> "75d854a6-565c-49f9-b4c8-b3344480ec4c"
Zerobounce.validate_file_delete(file_id)
=>
{"success"=>true,
 "message"=>"File Deleted",
 "file_name"=>"validation.csv",
 "file_id"=>"75d854a6-565c-49f9-b4c8-b3344480ec4c"}

AI Scoring

Send file

scoring_file_path = File.join(Dir.pwd, 'files', 'scoring.csv')
=> "/home/odin/zb/wrappers/ruby-test/files/scoring.csv"
Zerobounce.scoring_file_send(scoring_file_path)
=>
{"success"=>true,
 "message"=>"File Accepted",
 "file_name"=>"scoring.csv",
 "file_id"=>"89fb7262-b845-4fa1-aa25-e486347ec64e"}
# file_id will be required for the next steps
# optional named parameters
    email_address_column: 1,
    has_header_row: true,
    return_url: nil         # results callback url
# Zerobounce.scoring_file_send(scoring_file_path, email_address_column: 1)

File check

file_id = "89fb7262-b845-4fa1-aa25-e486347ec64e"
=> "89fb7262-b845-4fa1-aa25-e486347ec64e"
Zerobounce.scoring_file_check(file_id)
=>
{"success"=>true,
 "file_id"=>"89fb7262-b845-4fa1-aa25-e486347ec64e",
 "file_name"=>"scoring.csv",
 "upload_date"=>"2023-04-28T16:57:18Z",
 "file_status"=>"Complete",
 "complete_percentage"=>"100% Complete.",
 "return_url"=>nil}

Get file

file_id = "89fb7262-b845-4fa1-aa25-e486347ec64e"
=> "89fb7262-b845-4fa1-aa25-e486347ec64e"
Zerobounce.scoring_file_get(file_id)
=> "\"email\",\"ZeroBounceQualityScore\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"10\"\r\n\"[email protected]\",\"10\"\r\n\"[email protected]\",\"2\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"10\"\r\n\"[email protected]\",\"10\"\r\n\"[email protected]\",\"10\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\"\r\n\"[email protected]\",\"0\""

Delete file

file_id = "89fb7262-b845-4fa1-aa25-e486347ec64e"
=> "89fb7262-b845-4fa1-aa25-e486347ec64e"
Zerobounce.validate_file_delete(file_id)
=> {"success"=>false, "message"=>"File cannot be found."}

More details on CSV file submission and CSV result retrieval

This applies for both 'Email validation' and 'AI Scoring' functionalities.

The data of the submitted CSV file will be included in the result CSV file. Therefore, the first columns of the result CSV file will consist of the submitted data and the following columns will provide information specific to each functionality.

'Email validation'

The additional columns that would be included in result CSV file:

  • ZB Status
  • ZB Sub Status
  • ZB Account
  • ZB Domain
  • ZB First Name
  • ZB Last Name
  • ZB Gender
  • ZB Free Email
  • ZB MX Found
  • ZB MX Record
  • ZB SMTP Provider
  • ZB Did You Mean
  • ZB City
  • ZB Region/State
  • ZB Zip Code
  • ZB Country

When has_header_row: true is provided to validate_file_send() method, original columns of the submitted file will be retained.

When has_header_row: false, the columns that were explicitly specified in validate_file_send() will be given the following column title:

email_address_column    => "Email Address"
first_name_column       => "First Name"
last_name_column        => "Last Name"
gender_column           => "Gender"

Any additional that were not (or can not be) specified by parameters, will be given column title "Custom".

'AI Scoring':

The additional column that would be included in result CSV file:

  • ZeroBounceQualityScore

When has_header_row: true is provided to scoring_file_send() method, original columns of the submitted file will be retained.

When has_header_row: false is provided to scoring_file_send() method, column title for the email column (as well as the other columns) will be Email Address.

Email Finder

Guess Format

Zerobounce.guessformat("zerobounce.net")
=>
{"email"=>"",
 "domain"=>"zerobounce.net",
 "format"=>"first.last",
 "status"=>"",
 "sub_status"=>"",
 "confidence"=>"high",
 "did_you_mean"=>"",
 "failure_reason"=>"",
 "other_domain_formats"=>
  [{"format"=>"first", "confidence"=>"high"},
   {"format"=>"last.first", "confidence"=>"high"},
   {"format"=>"lfirst", "confidence"=>"high"},
   {"format"=>"lastfirst", "confidence"=>"high"},
   {"format"=>"firstl", "confidence"=>"high"},
   {"format"=>"last", "confidence"=>"medium"},
   {"format"=>"first.middle.last", "confidence"=>"medium"},
   {"format"=>"first-last", "confidence"=>"medium"},
   {"format"=>"l.first", "confidence"=>"medium"},
   {"format"=>"f.last", "confidence"=>"medium"},
   {"format"=>"f-last", "confidence"=>"medium"},
   {"format"=>"first.l", "confidence"=>"medium"},
   {"format"=>"first-l", "confidence"=>"medium"},
   {"format"=>"firstlast", "confidence"=>"medium"},
   {"format"=>"first_l", "confidence"=>"medium"},
   {"format"=>"f_last", "confidence"=>"medium"},
   {"format"=>"last.f", "confidence"=>"medium"},
   {"format"=>"last-f", "confidence"=>"medium"},
   {"format"=>"last-first", "confidence"=>"medium"},
   {"format"=>"first_last", "confidence"=>"medium"},
   {"format"=>"last_f", "confidence"=>"medium"},
   {"format"=>"last_first", "confidence"=>"medium"},
   {"format"=>"flast", "confidence"=>"medium"},
   {"format"=>"lastf", "confidence"=>"medium"},
   {"format"=>"l-first", "confidence"=>"low"},
   {"format"=>"l_first", "confidence"=>"low"}]}
# Zerobounce.guessformat("zerobounce.net", first_name: "John", middle_name: 'Deere', last_name: "Doe")

Development

After checking out the repo run tests

rspec --init # if needed
bundle exec rspec

You should see an output like this

Run options: include {:focus=>true}
running live tests
.....................................................

Finished in 6.81 seconds (files took 0.40587 seconds to load)
53 examples, 0 failures

Test parameters

The tests use the following environment parameters: TEST unit|live influences whether mocked unit tests are run or the live server is used (credits may be used if you choose to do this) ZEROBOUNCE_API_KEY <zerobounce-api-key-value> this key is used to make requests to the live server; it is also used in mock tests as a valid key sample (any value will work for mock tests) INCORRECT_API_KEY non whitespace string value that is not a valid key used for tests where the requests are meant to fail due to the API key value.

To set them

export ZEROBOUNCE_API_KEY=99e7ef20ceea4480a173b07b1be75371
export INCORRECT_API_KEY=thiskeyisinvalidorotherwiseincorrect
export TEST=unit

A .env.sample file is provided.

Mock tests were generated using webmock and vcr. This means that actual requests were made and recorded in the spec/cassettes with an (at the time) valid API key used for testing purposes. This key has been invalidated in the meantime, however it is provided in the .env.sample file for the mock tests to work. If you do not wish to use this key for mocks, you can replace it with any value in the .yml files under spec/cassettes or delete all of them and rerun the tests so that vcr records them with a new key.