lithic-com · stainless-app · Jan 29, 2026 · Jan 29, 2026 · Jan 30, 2026 · Feb 2, 2026
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.4.0"
+  ".": "0.5.0"
 }
diff --git a/.stats.yml b/.stats.yml
@@ -1,4 +1,4 @@
-configured_endpoints: 176
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/lithic%2Flithic-ce2adff9b644ed4562b5342a4a43d0b40c98d43b4e063b4626f4ca5d342f1b92.yml
-openapi_spec_hash: fbc84b866ce96457261ac58b4e75c71d
-config_hash: 31d71922d7838f34ae0875c9b8026d99
+configured_endpoints: 177
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/lithic%2Flithic-c24eebe942f400bff8922a6fbef1ce551ad14f61eb4da21b50d823a62ca42586.yml
+openapi_spec_hash: b79ed927e625dedff69cea29131a34d9
+config_hash: 693dddc4721eef512d75ab6c60897794
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,38 @@
 # Changelog
 
+## 0.5.0 (2026-02-13)
+
+Full Changelog: [v0.4.0...v0.5.0](https://github.com/lithic-com/lithic-ruby/compare/v0.4.0...v0.5.0)
+
+### Features
+
+* **api:** Add /v2/auth_rules/results endpoint for listing rule evaluation data ([638e66d](https://github.com/lithic-com/lithic-ruby/commit/638e66d63951f2710eff7865b66b8424ee9df347))
+* **api:** Add amounts object to ASA request ([22955ed](https://github.com/lithic-com/lithic-ruby/commit/22955ed42c914a5f505254ca94561c192363bca6))
+* **api:** Add hold token field to book transfers ([d23cb0b](https://github.com/lithic-com/lithic-ruby/commit/d23cb0bc4df0226c18bb47da55aa397f1bbc3354))
+* **api:** Add naics_code to account holder requests/responses ([76b507b](https://github.com/lithic-com/lithic-ruby/commit/76b507bf26f50ac5be4cd8210e781435a5d8bd0f))
+* **api:** Add network specific wallet recommendation reasons ([6ddef73](https://github.com/lithic-com/lithic-ruby/commit/6ddef73bfef32916381d94e54565e0e47d81c169))
+* **api:** Add PENDING_REVIEW status to KYB enrollment simulation ([1a6d821](https://github.com/lithic-com/lithic-ruby/commit/1a6d821b937e9a263e0e5f765a80e44d52471867))
+* **api:** Add result schemas for Authorization and Authentication (3DS) actions ([f669caf](https://github.com/lithic-com/lithic-ruby/commit/f669cafbb5f8d2f84295b576de01c4e41e1b1789))
+
+
+### Bug Fixes
+
+* **api:** Update /v2/auth_rules/results endpoint parameter naming and action types ([25e39e6](https://github.com/lithic-com/lithic-ruby/commit/25e39e68e249381a826c6a17811ff69eb882f82d))
+* **client:** always add content-length to post body, even when empty ([dc99413](https://github.com/lithic-com/lithic-ruby/commit/dc994133ff0d96a903dab13326254b2b378c06ae))
+* **client:** loosen json header parsing ([a9a41d9](https://github.com/lithic-com/lithic-ruby/commit/a9a41d9cff9dd7f7a1772c76f9c9aae130b1b90a))
+
+
+### Chores
+
+* configure new SDK language ([8192e34](https://github.com/lithic-com/lithic-ruby/commit/8192e34c05ef27263d1e3490092035c9e316c986))
+* **docs:** remove www prefix ([cecdec2](https://github.com/lithic-com/lithic-ruby/commit/cecdec231888818a2ec01dca178d45a741d5326b))
+* Enable stainless MCP in config ([03570d6](https://github.com/lithic-com/lithic-ruby/commit/03570d6a7cde12dc24f4a4237ea4d0042d215817))
+
+
+### Documentation
+
+* Fix documentation of tokenization channel and tokenization source for tokenization rules ([5de9576](https://github.com/lithic-com/lithic-ruby/commit/5de957671f0c262e663dd787617921e6ade623e0))
+
 ## 0.4.0 (2026-01-27)
 
 Full Changelog: [v0.3.0...v0.4.0](https://github.com/lithic-com/lithic-ruby/compare/v0.3.0...v0.4.0)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -43,13 +43,13 @@ If you’d like to use the repository from source, you can either install from g
 To install via git in your `Gemfile`:
 
 ```ruby
-gem "lithic", git: "https://www.github.com/lithic-com/lithic-ruby"
+gem "lithic", git: "https://github.com/lithic-com/lithic-ruby"
 ```
 
 Alternatively, reference local copy of the repo:
 
 ```bash
-$ git clone -- 'https://www.github.com/lithic-com/lithic-ruby' '<path-to-repo>'
+$ git clone -- 'https://github.com/lithic-com/lithic-ruby' '<path-to-repo>'
 ```
 
 ```ruby

diff --git a/Gemfile.lock b/Gemfile.lock
@@ -18,7 +18,7 @@ GIT
 PATH
   remote: .
   specs:
-    lithic (0.4.0)
+    lithic (0.5.0)
       cgi
       connection_pool
 

diff --git a/README.md b/README.md
@@ -2,6 +2,15 @@
 
 The Lithic Ruby library provides convenient access to the Lithic REST API from any Ruby 3.2.0+ application. It ships with comprehensive types & docstrings in Yard, RBS, and RBI – [see below](https://github.com/lithic-com/lithic-ruby#Sorbet) for usage with Sorbet. The standard library's `net/http` is used as the HTTP transport, with connection pooling via the `connection_pool` gem.
 
+## MCP Server
+
+Use the Lithic MCP Server to enable AI assistants to interact with this API, allowing them to explore endpoints, make test requests, and use documentation to help integrate this SDK into your application.
+
+[![Add to Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en-US/install-mcp?name=lithic-mcp&config=eyJuYW1lIjoibGl0aGljLW1jcCIsInRyYW5zcG9ydCI6Imh0dHAiLCJ1cmwiOiJodHRwczovL2xpdGhpYy5zdGxtY3AuY29tIiwiaGVhZGVycyI6eyJ4LWxpdGhpYy1hcGkta2V5IjoiTXkgTGl0aGljIEFQSSBLZXkifX0)
+[![Install in VS Code](https://img.shields.io/badge/_-Add_to_VS_Code-blue?style=for-the-badge&logo=data:image/svg%2bxml;base64,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)](https://vscode.stainless.com/mcp/%7B%22name%22%3A%22lithic-mcp%22%2C%22type%22%3A%22http%22%2C%22url%22%3A%22https%3A%2F%2Flithic.stlmcp.com%22%2C%22headers%22%3A%7B%22x-lithic-api-key%22%3A%22My%20Lithic%20API%20Key%22%7D%7D)
+
+> Note: You may need to set environment variables in your MCP client.
+
 ## Documentation
 
 Documentation for releases of this gem can be found [on RubyDoc](https://gemdocs.org/gems/lithic).
@@ -15,7 +24,7 @@ To use this gem, install via Bundler by adding the following to your application
 <!-- x-release-please-start-version -->
 
 ```ruby
-gem "lithic", "~> 0.4.0"
+gem "lithic", "~> 0.5.0"
 ```
 
 <!-- x-release-please-end -->

diff --git a/lib/lithic.rb b/lib/lithic.rb
@@ -127,6 +127,8 @@
 require_relative "lithic/models/auth_rules/v2_delete_params"
 require_relative "lithic/models/auth_rules/v2_draft_params"
 require_relative "lithic/models/auth_rules/v2_list_params"
+require_relative "lithic/models/auth_rules/v2_list_results_params"
+require_relative "lithic/models/auth_rules/v2_list_results_response"
 require_relative "lithic/models/auth_rules/v2_promote_params"
 require_relative "lithic/models/auth_rules/v2_retrieve_features_params"
 require_relative "lithic/models/auth_rules/v2_retrieve_features_response"

diff --git a/lib/lithic/internal/transport/pooled_net_requester.rb b/lib/lithic/internal/transport/pooled_net_requester.rb
@@ -75,7 +75,7 @@ def build_request(request, &blk)
 
             case body
             in nil
-              nil
+              req["content-length"] ||= 0 unless req["transfer-encoding"]
             in String
               req["content-length"] ||= body.bytesize.to_s unless req["transfer-encoding"]
               req.body_stream = Lithic::Internal::Util::ReadIOAdapter.new(body, &blk)

diff --git a/lib/lithic/internal/util.rb b/lib/lithic/internal/util.rb
@@ -485,7 +485,7 @@ def writable_enum(&blk)
       end
 
       # @type [Regexp]
-      JSON_CONTENT = %r{^application/(?:vnd(?:\.[^.]+)*\+)?json(?!l)}
+      JSON_CONTENT = %r{^application/(?:[a-zA-Z0-9.-]+\+)?json(?!l)}
       # @type [Regexp]
       JSONL_CONTENT = %r{^application/(:?x-(?:n|l)djson)|(:?(?:x-)?jsonl)}
 

diff --git a/lib/lithic/models/account_holder.rb b/lib/lithic/models/account_holder.rb
@@ -97,6 +97,13 @@ class AccountHolder < Lithic::Internal::Type::BaseModel
       #   @return [Lithic::Models::AccountHolder::Individual, nil]
       optional :individual, -> { Lithic::AccountHolder::Individual }
 
+      # @!attribute naics_code
+      #   Only present when user_type == "BUSINESS". 6-digit North American Industry
+      #   Classification System (NAICS) code for the business.
+      #
+      #   @return [String, nil]
+      optional :naics_code, String
+
       # @!attribute nature_of_business
       #   Only present when user_type == "BUSINESS". User-submitted description of the
       #   business.
@@ -143,8 +150,8 @@ class AccountHolder < Lithic::Internal::Type::BaseModel
       # @!attribute user_type
       #   The type of Account Holder. If the type is "INDIVIDUAL", the "individual"
       #   attribute will be present. If the type is "BUSINESS" then the "business_entity",
-      #   "control_person", "beneficial_owner_individuals", "nature_of_business", and
-      #   "website_url" attributes will be present.
+      #   "control_person", "beneficial_owner_individuals", "naics_code",
+      #   "nature_of_business", and "website_url" attributes will be present.
       #
       #   @return [Symbol, Lithic::Models::AccountHolder::UserType, nil]
       optional :user_type, enum: -> { Lithic::AccountHolder::UserType }
@@ -161,7 +168,7 @@ class AccountHolder < Lithic::Internal::Type::BaseModel
       #   @return [String, nil]
       optional :website_url, String
 
-      # @!method initialize(token:, created:, account_token: nil, beneficial_owner_entities: nil, beneficial_owner_individuals: nil, business_account_token: nil, business_entity: nil, control_person: nil, email: nil, exemption_type: nil, external_id: nil, individual: nil, nature_of_business: nil, phone_number: nil, required_documents: nil, status: nil, status_reasons: nil, user_type: nil, verification_application: nil, website_url: nil)
+      # @!method initialize(token:, created:, account_token: nil, beneficial_owner_entities: nil, beneficial_owner_individuals: nil, business_account_token: nil, business_entity: nil, control_person: nil, email: nil, exemption_type: nil, external_id: nil, individual: nil, naics_code: nil, nature_of_business: nil, phone_number: nil, required_documents: nil, status: nil, status_reasons: nil, user_type: nil, verification_application: nil, website_url: nil)
       #   Some parameter documentations has been truncated, see
       #   {Lithic::Models::AccountHolder} for more details.
       #
@@ -189,6 +196,8 @@ class AccountHolder < Lithic::Internal::Type::BaseModel
       #
       #   @param individual [Lithic::Models::AccountHolder::Individual] Only present when user_type == "INDIVIDUAL". Information about the individual fo
       #
+      #   @param naics_code [String] Only present when user_type == "BUSINESS". 6-digit North American Industry Class
+      #
       #   @param nature_of_business [String] Only present when user_type == "BUSINESS". User-submitted description of the bus
       #
       #   @param phone_number [String] (Deprecated. Use control_person.phone_number when user_type == "BUSINESS". Use i
@@ -592,8 +601,8 @@ module StatusReason
 
       # The type of Account Holder. If the type is "INDIVIDUAL", the "individual"
       # attribute will be present. If the type is "BUSINESS" then the "business_entity",
-      # "control_person", "beneficial_owner_individuals", "nature_of_business", and
-      # "website_url" attributes will be present.
+      # "control_person", "beneficial_owner_individuals", "naics_code",
+      # "nature_of_business", and "website_url" attributes will be present.
       #
       # @see Lithic::Models::AccountHolder#user_type
       module UserType

diff --git a/lib/lithic/models/account_holder_create_params.rb b/lib/lithic/models/account_holder_create_params.rb
@@ -84,6 +84,13 @@ class AccountHolderCreateParams < Lithic::Internal::Type::BaseModel
       #   @return [String, nil]
       optional :kyb_passed_timestamp, String
 
+      # @!attribute naics_code
+      #   6-digit North American Industry Classification System (NAICS) code for the
+      #   business.
+      #
+      #   @return [String, nil]
+      optional :naics_code, String
+
       # @!attribute website_url
       #   Company website URL.
       #
@@ -151,7 +158,7 @@ class AccountHolderCreateParams < Lithic::Internal::Type::BaseModel
       #   @return [String, nil]
       optional :business_account_token, String
 
-      # @!method initialize(business_entity:, tos_timestamp:, workflow:, individual:, address:, email:, first_name:, kyc_exemption_type:, last_name:, phone_number:, beneficial_owner_individuals: nil, control_person: nil, nature_of_business: nil, beneficial_owner_entities: nil, external_id: nil, kyb_passed_timestamp: nil, website_url: nil, kyc_passed_timestamp: nil, business_account_token: nil, request_options: {})
+      # @!method initialize(business_entity:, tos_timestamp:, workflow:, individual:, address:, email:, first_name:, kyc_exemption_type:, last_name:, phone_number:, beneficial_owner_individuals: nil, control_person: nil, nature_of_business: nil, beneficial_owner_entities: nil, external_id: nil, kyb_passed_timestamp: nil, naics_code: nil, website_url: nil, kyc_passed_timestamp: nil, business_account_token: nil, request_options: {})
       #   Some parameter documentations has been truncated, see
       #   {Lithic::Models::AccountHolderCreateParams} for more details.
       #
@@ -187,6 +194,8 @@ class AccountHolderCreateParams < Lithic::Internal::Type::BaseModel
       #
       #   @param kyb_passed_timestamp [String] An RFC 3339 timestamp indicating when precomputed KYB was completed on the busin
       #
+      #   @param naics_code [String] 6-digit North American Industry Classification System (NAICS) code for the busin
+      #
       #   @param website_url [String] Company website URL.
       #
       #   @param kyc_passed_timestamp [String] An RFC 3339 timestamp indicating when precomputed KYC was completed on the indiv

diff --git a/lib/lithic/models/account_holder_simulate_enrollment_review_params.rb b/lib/lithic/models/account_holder_simulate_enrollment_review_params.rb
@@ -45,6 +45,7 @@ module Status
 
         ACCEPTED = :ACCEPTED
         REJECTED = :REJECTED
+        PENDING_REVIEW = :PENDING_REVIEW
 
         # @!method self.values
         #   @return [Array<Symbol>]

diff --git a/lib/lithic/models/account_holder_simulate_enrollment_review_response.rb b/lib/lithic/models/account_holder_simulate_enrollment_review_response.rb
@@ -102,6 +102,13 @@ class AccountHolderSimulateEnrollmentReviewResponse < Lithic::Internal::Type::Ba
       #   @return [Lithic::Models::AccountHolderSimulateEnrollmentReviewResponse::Individual, nil]
       optional :individual, -> { Lithic::Models::AccountHolderSimulateEnrollmentReviewResponse::Individual }
 
+      # @!attribute naics_code
+      #   Only present when user_type == "BUSINESS". 6-digit North American Industry
+      #   Classification System (NAICS) code for the business.
+      #
+      #   @return [String, nil]
+      optional :naics_code, String
+
       # @!attribute nature_of_business
       #   Only present when user_type == "BUSINESS". User-submitted description of the
       #   business.
@@ -147,8 +154,8 @@ class AccountHolderSimulateEnrollmentReviewResponse < Lithic::Internal::Type::Ba
       #   attribute will be present.
       #
       #   If the type is "BUSINESS" then the "business_entity", "control_person",
-      #   "beneficial_owner_individuals", "nature_of_business", and "website_url"
-      #   attributes will be present.
+      #   "beneficial_owner_individuals", "naics_code", "nature_of_business", and
+      #   "website_url" attributes will be present.
       #
       #   @return [Symbol, Lithic::Models::AccountHolderSimulateEnrollmentReviewResponse::UserType, nil]
       optional :user_type, enum: -> { Lithic::Models::AccountHolderSimulateEnrollmentReviewResponse::UserType }
@@ -166,7 +173,7 @@ class AccountHolderSimulateEnrollmentReviewResponse < Lithic::Internal::Type::Ba
       #   @return [String, nil]
       optional :website_url, String
 
-      # @!method initialize(token: nil, account_token: nil, beneficial_owner_entities: nil, beneficial_owner_individuals: nil, business_account_token: nil, business_entity: nil, control_person: nil, created: nil, email: nil, exemption_type: nil, external_id: nil, individual: nil, nature_of_business: nil, phone_number: nil, required_documents: nil, status: nil, status_reasons: nil, user_type: nil, verification_application: nil, website_url: nil)
+      # @!method initialize(token: nil, account_token: nil, beneficial_owner_entities: nil, beneficial_owner_individuals: nil, business_account_token: nil, business_entity: nil, control_person: nil, created: nil, email: nil, exemption_type: nil, external_id: nil, individual: nil, naics_code: nil, nature_of_business: nil, phone_number: nil, required_documents: nil, status: nil, status_reasons: nil, user_type: nil, verification_application: nil, website_url: nil)
       #   Some parameter documentations has been truncated, see
       #   {Lithic::Models::AccountHolderSimulateEnrollmentReviewResponse} for more
       #   details.
@@ -195,6 +202,8 @@ class AccountHolderSimulateEnrollmentReviewResponse < Lithic::Internal::Type::Ba
       #
       #   @param individual [Lithic::Models::AccountHolderSimulateEnrollmentReviewResponse::Individual] Only present when user_type == "INDIVIDUAL". Information about the individual fo
       #
+      #   @param naics_code [String] Only present when user_type == "BUSINESS". 6-digit North American Industry Class
+      #
       #   @param nature_of_business [String] Only present when user_type == "BUSINESS". User-submitted description of the bus
       #
       #   @param phone_number [String] (Deprecated. Use control_person.phone_number when user_type == "BUSINESS".
@@ -660,8 +669,8 @@ module StatusReason
       # attribute will be present.
       #
       # If the type is "BUSINESS" then the "business_entity", "control_person",
-      # "beneficial_owner_individuals", "nature_of_business", and "website_url"
-      # attributes will be present.
+      # "beneficial_owner_individuals", "naics_code", "nature_of_business", and
+      # "website_url" attributes will be present.
       #
       # @see Lithic::Models::AccountHolderSimulateEnrollmentReviewResponse#user_type
       module UserType

diff --git a/lib/lithic/models/account_holder_update_params.rb b/lib/lithic/models/account_holder_update_params.rb
@@ -55,6 +55,13 @@ class AccountHolderUpdateParams < Lithic::Internal::Type::BaseModel
       #   @return [String, nil]
       optional :external_id, String
 
+      # @!attribute naics_code
+      #   6-digit North American Industry Classification System (NAICS) code for the
+      #   business.
+      #
+      #   @return [String, nil]
+      optional :naics_code, String
+
       # @!attribute nature_of_business
       #   Short description of the company's line of business (i.e., what does the company
       #   do?).
@@ -122,7 +129,7 @@ class AccountHolderUpdateParams < Lithic::Internal::Type::BaseModel
       #   @return [String, nil]
       optional :phone_number, String
 
-      # @!method initialize(beneficial_owner_entities: nil, beneficial_owner_individuals: nil, business_entity: nil, control_person: nil, external_id: nil, nature_of_business: nil, website_url: nil, individual: nil, address: nil, business_account_token: nil, email: nil, first_name: nil, last_name: nil, legal_business_name: nil, phone_number: nil, request_options: {})
+      # @!method initialize(beneficial_owner_entities: nil, beneficial_owner_individuals: nil, business_entity: nil, control_person: nil, external_id: nil, naics_code: nil, nature_of_business: nil, website_url: nil, individual: nil, address: nil, business_account_token: nil, email: nil, first_name: nil, last_name: nil, legal_business_name: nil, phone_number: nil, request_options: {})
       #   Some parameter documentations has been truncated, see
       #   {Lithic::Models::AccountHolderUpdateParams} for more details.
       #
@@ -136,6 +143,8 @@ class AccountHolderUpdateParams < Lithic::Internal::Type::BaseModel
       #
       #   @param external_id [String] A user provided id that can be used to link an account holder with an external s
       #
+      #   @param naics_code [String] 6-digit North American Industry Classification System (NAICS) code for the busin
+      #
       #   @param nature_of_business [String] Short description of the company's line of business (i.e., what does the company
       #
       #   @param website_url [String] Company website URL.