diff --git a/catalyst-gateway/.spectral.yml b/catalyst-gateway/.spectral.yml
new file mode 100644
index 00000000000..8a8c366e86b
--- /dev/null
+++ b/catalyst-gateway/.spectral.yml
@@ -0,0 +1,122 @@
+# References to the rules 
+# OpenAPI: https://docs.stoplight.io/docs/spectral/4dec24461f3af-open-api-rules#openapi-rules
+# OWASP Top 10: https://github.com/stoplightio/spectral-owasp-ruleset/blob/v1.4.3/src/ruleset.ts
+# Documentations: https://github.com/stoplightio/spectral-documentation/blob/v1.3.1/src/ruleset.ts
+
+# cspell: words OWASP owasp Baction Baccount
+
+# Use CDN hosted version for spectral-documentation and spectral-owasp
+extends:
+- 'spectral:oas'
+- 'https://unpkg.com/@stoplight/spectral-documentation@1.3.1/dist/ruleset.mjs'
+- 'https://unpkg.com/@stoplight/spectral-owasp-ruleset@1.4.3/dist/ruleset.mjs'
+
+aliases:
+  PathItem:
+  - $.paths[*]
+  OperationObject:
+  - $.paths[*][get,put,post,delete,options,head,patch,trace]
+  DescribableObjects:
+  - $.info
+  - $.tags[*]
+  - '#OperationObject'
+  - '#OperationObject.responses[*]'
+  - '#PathItem.parameters[?(@ && @.in)]'
+  - '#OperationObject.parameters[?(@ && @.in)]'
+
+overrides:
+- files: ['*']
+  rules:
+    # Override document description rule
+    # - No limitations on the characters that can start or end a sentence.
+    # - Length should be >= 20 characters
+    # Ref: https://github.com/stoplightio/spectral-documentation/blob/a34ca1b49cbd1ac5a75cfcb93c69d1d77bde341e/src/ruleset.ts#L173
+    docs-description:
+      given: '#DescribableObjects'
+      then:
+      - field: 'description'
+        function: 'truthy'
+      - field: 'description'
+        function: 'length'
+        functionOptions:
+          min: 20
+      - field: 'description'
+        function: 'pattern'
+        functionOptions:
+          # Matches any character that is #, *, uppercase or lowercase letters from A to Z, or digits from 0 to 9 at the beginning of the string.
+          # with zero or more occurrences of any character except newline.
+          match: '^[#*A-Za-z0-9].*'
+
+    # Severity
+    # warn: Should be implemented, but is blocked by a technical issue.
+    # info: Good to be implemented.
+
+    # Rate limit
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L436
+    owasp:api4:2019-rate-limit: warn
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L484
+    owasp:api4:2019-rate-limit-responses-429: warn
+    # Public API
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L305
+    owasp:api2:2019-protection-global-safe: info
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L269
+    owasp:api2:2019-protection-global-unsafe: info
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L287
+    owasp:api2:2019-protection-global-unsafe-strict: info
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L376
+    owasp:api3:2019-define-error-responses-401: warn
+
+    # UUID rules for name containing "id" is ignored    
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L102
+    owasp:api1:2019-no-numeric-ids: off
+
+- files:
+  - '**#/paths/~1api~1health~1live/get/responses'
+  - '**#/paths/~1api~1health~1started/get/responses'
+  - '**#/paths/~1api~1health~1ready/get/responses'
+  - '**#/paths/~1api~1test~1test~1%7Bid%7D~1test~1%7Baction%7D/post/responses'
+  - '**#/paths/~1api~1test~1test~1%7Bid%7D~1test~1%7Baction%7D/get/responses'
+  # Recheck this, already apply validator but does not work "FragmentId"
+  - '**#/paths/~1api~1v1~1fragments~1statuses/get/parameters/0/schema'
+  # Recheck this, already apply validator but does not work "AccountId"
+  - '**#/paths/~1api~1v1~1votes~1plan~1account-votes~1%7Baccount_id%7D/get/parameters/0/schema'
+  rules:
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L551
+    owasp:api4:2019-string-restricted: off
+
+- files:
+  - '**#/paths/~1api~1health~1live/get/responses'
+  - '**#/paths/~1api~1health~1started/get/responses'
+  - '**#/paths/~1api~1health~1ready/get/responses'
+  - '**#/paths/~1api~1v0~1message/post/requestBody/content'
+  - '**#/paths/~1api~1test~1test~1%7Bid%7D~1test~1%7Baction%7D/post/responses'
+  - '**#/paths/~1api~1test~1test~1%7Bid%7D~1test~1%7Baction%7D/get/responses'
+  - '**#/components/schemas/ServerErrorPayload/properties/id'
+  - '**#/components/schemas/VoterRegistration/properties/as_at'
+  - '**#/components/schemas/VoterRegistration/properties/last_updated'
+  # Recheck this, already apply validator but does not work "FragmentId"
+  - '**#/paths/~1api~1v1~1fragments~1statuses/get/parameters/0/schema'
+  # Recheck this, already apply validator but does not work "AccountId"
+  - '**#/paths/~1api~1v1~1votes~1plan~1account-votes~1%7Baccount_id%7D/get/parameters/0/schema'
+  rules:
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L521
+    owasp:api4:2019-string-limit: off
+
+- files:
+  - '**#/paths/~1api~1v0~1vote~1active~1plans/get/responses'
+  - '**#/paths/~1api~1v1~1votes~1plan~1account-votes~1%7Baccount_id%7D/get/responses'
+  rules:
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L506
+    owasp:api4:2019-array-limit: off
+
+- files:
+  - '**#/components/schemas/FragmentStatus'
+  rules:
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L678
+    owasp:api6:2019-no-additionalProperties: off
+
+- files:
+  - '**#/paths/~1api~1v1~1fragments~1statuses/get/responses'
+  rules:
+    # Ref: https://github.com/stoplightio/spectral-owasp-ruleset/blob/2fd49c377794222352ff10dee99ed2a106c35199/src/ruleset.ts#L698
+    owasp:api6:2019-constrained-additionalProperties: off
diff --git a/catalyst-gateway/Earthfile b/catalyst-gateway/Earthfile
index 09033797aa2..872e1d103a8 100644
--- a/catalyst-gateway/Earthfile
+++ b/catalyst-gateway/Earthfile
@@ -46,6 +46,16 @@ build:
 all-hosts-build:
     BUILD --platform=linux/amd64 --platform=linux/arm64 +build
 
+
+# test-lint-openapi - OpenAPI linting from an artifact
+# testing whether the OpenAPI generated during build stage follows good practice.
+test-lint-openapi:
+    FROM github.com/input-output-hk/catalyst-ci/earthly/spectral:v2.4.0+spectral-base
+    # Copy the doc artifact.
+    COPY +build/doc ./doc
+    # Scan the doc directory where type of file is JSON.
+    DO github.com/input-output-hk/catalyst-ci/earthly/spectral:v2.4.0+BUILD_SPECTRAL --dir=./doc --file_type="json"
+
 # Publish packages if all integration tests have passed. (Failure to pass tests will prevent packages being published.)
 # publish:
 #    FROM scratch
@@ -58,3 +68,4 @@ local-ci-run:
     BUILD +build
     # BUILD +package
     # BUILD +publish
+