diff --git a/CHANGELOG.md b/CHANGELOG.md
index c760c91..64aa8a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 All notable changes to this project will be documented in this file.
 
 ## [1.42.0]
-- Added rules for authress, clickhouse
+- Added rules for authress, clickhouse, codecov, contentful, curl, dropbox, fly.io
 - Internal refactoring of rule loader, git enumerator, and filetype guesser
 - Improved language detection
 
diff --git a/data/rules/baremetrics.yml b/data/rules/baremetrics.yml
index 2036d18..ce0f37a 100644
--- a/data/rules/baremetrics.yml
+++ b/data/rules/baremetrics.yml
@@ -2,8 +2,8 @@ rules:
   - name: Baremetrics API Key
     id: kingfisher.baremetrics.1
     pattern: |
-      (?xi)                       
-      \b                         
+      (?xi)
+      \b
       baremetrics
       (?:.|[\n\r]){0,32}?
       \b                         
diff --git a/data/rules/clickhouse.yml b/data/rules/clickhouse.yml
index 8e3d7c4..57317b9 100644
--- a/data/rules/clickhouse.yml
+++ b/data/rules/clickhouse.yml
@@ -41,7 +41,7 @@ rules:
       \b
       clickhouse
       (?:.|[\n\r]){0,16}?
-      (?:\bID|\bUSER)
+      (?:ID|USER)
       (?:.|[\n\r]){0,16}?
       \b
       (
diff --git a/data/rules/clojars.yml b/data/rules/clojars.yml
new file mode 100644
index 0000000..58fb19d
--- /dev/null
+++ b/data/rules/clojars.yml
@@ -0,0 +1,37 @@
+rules:
+  - name: Clojars Username
+    id: kingfisher.clojars.1
+    pattern: |
+      (?xi)
+      \b
+      clojars
+      (?:.|[\n\r]){0,32}?
+      (?:ID|USER)
+      (?:.|[\n\r]){0,16}?
+      \b
+      (
+        [a-zA-Z0-9_-]{3,}
+      )
+      \b
+    confidence: medium
+    min_entropy: 1.5
+    visible: false
+    examples:
+      - "clojars_user = my-username"
+
+  - name: Clojars API Token
+    id: kingfisher.clojars.2
+    pattern: |
+      (?xi)
+      \b
+      (
+        CLOJARS_[a-z0-9]{60}
+      )
+      \b
+    confidence: medium
+    min_entropy: 4.0
+    examples:
+      - "CLOJARS_7a0b5c647fdca75616e99a5629ba28955e53faf6391b1b4461ccd972b0e2"
+    references:
+      - https://github.com/clojars/clojars-web/wiki/API
+      - https://github.com/clojars/clojars-web/wiki/Tutorial-for-library-authors
\ No newline at end of file
diff --git a/data/rules/codecov.yml b/data/rules/codecov.yml
new file mode 100644
index 0000000..1bc5e7a
--- /dev/null
+++ b/data/rules/codecov.yml
@@ -0,0 +1,36 @@
+rules:
+  - name: Codecov Access Token
+    id: kingfisher.codecov.1
+    pattern: |
+      (?xi)
+      \b
+      codecov
+      (?:.|[\n\r]){0,32}?
+      (?:SECRET|PRIVATE|ACCESS|KEY|TOKEN)
+      (?:.|[\n\r]){0,32}?
+      (
+        [A-Z0-9-]{36}
+      )
+      \b
+    confidence: medium
+    min_entropy: 3.5
+    validation:
+      type: Http
+      content:
+        request:
+          method: GET
+          url: "https://api.codecov.io/api/v2/github/"
+          headers:
+            Authorization: "Bearer {{TOKEN}}"
+            Accept: application/json
+          response_matcher:
+            - report_response: true
+            - type: StatusMatch
+              status: [200]
+            - type: WordMatch
+              words:
+                - '"count":'
+    references:
+      - https://docs.codecov.com/reference/api-overview
+    examples:
+      - "codecov_token = 52acf265-3fc6-4ecd-304a-15940bd04653"
diff --git a/data/rules/contentful.yml b/data/rules/contentful.yml
new file mode 100644
index 0000000..3846abf
--- /dev/null
+++ b/data/rules/contentful.yml
@@ -0,0 +1,74 @@
+rules:
+  - name: Contentful Delivery API Token
+    id: kingfisher.contentful.1
+    pattern: |
+      (?xi)
+      \b
+      contentful
+      (?:.|[\n\r]){0,32}?
+      (?:SECRET|PRIVATE|ACCESS|KEY|TOKEN)
+      (?:.|[\n\r]){0,32}?
+      \b
+      (
+        [a-zA-Z0-9_-]{43,45}
+      )
+      \b
+    confidence: medium
+    min_entropy: 4.0
+    validation:
+      type: Http
+      content:
+        request:
+          method: GET
+          url: "https://cdn.contentful.com/spaces"
+          headers:
+            Authorization: "Bearer {{TOKEN}}"
+          response_matcher:
+            - report_response: true
+            - type: StatusMatch
+              status: [200]
+            - type: WordMatch
+              words:
+                - '"sys":'
+                - '"type":"Array"'
+                - '"items":'
+              match_all_words: true
+    references:
+      - https://www.contentful.com/developers/docs/references/content-delivery-api/
+    examples:
+      - "contentful_delivery_token = wJz-g_tqZ-8n_abcdefghijklmnopqrstuvwxyz12345"
+
+  - name: Contentful Personal Access Token
+    id: kingfisher.contentful.2
+    pattern: |
+      (?xi)
+      \b
+      (
+        CFPAT-[A-Z0-9_-]{43}
+      )
+      \b
+    confidence: medium
+    min_entropy: 3.5
+    validation:
+      type: Http
+      content:
+        request:
+          method: GET
+          url: "https://api.contentful.com/users/me"
+          headers:
+            Authorization: "Bearer {{TOKEN}}"
+          response_matcher:
+            - report_response: true
+            - type: StatusMatch
+              status: [200]
+            - type: WordMatch
+              words:
+                - '"firstName":'
+                - '"lastName":'
+              match_all_words: true
+    references:
+      - https://www.contentful.com/developers/docs/references/content-management-api/#/reference/users/user
+    examples:
+      - "CFPAT-Cq3AarsJCDvdG9PYAJ3Y00crCG5nEPAAfVZ2LAldCsQ"
+      - "CFPAT-WFWEK_dWYIW0-uamOjhUBAJJ9NqQisr1x_ylb4z1vcQ"
+      - "CFPAT-lkITY2pqeiE0_p9TxUZrGAhfHJIiwYtbtr769y4_AYY"
diff --git a/data/rules/curl.yml b/data/rules/curl.yml
new file mode 100644
index 0000000..4f28cfe
--- /dev/null
+++ b/data/rules/curl.yml
@@ -0,0 +1,24 @@
+rules:
+  - name: Curl Basic Authentication Credentials
+    id: kingfisher.curl.1
+    pattern: '(?i)\bcurl\s.*(?:-u|--user)\s+[''"]?(?P<TOKEN>[^:''"\s]+:[^''"\s]+)[''"]?'
+    confidence: low
+    min_entropy: 3.0
+    references:
+      - https://curl.se/docs/manpage.html#-u
+    examples:
+      - 'curl --cacert ca.crt -u elastic:P@ssw0rd$1 https://localhost:9200'
+      - 'curl -u developer:yqDVtkqPECriaLRi'
+      - 'curl --user roger23@gmail.com:pQ9wTxu4Fg https://www.dropbox.com'
+
+  - name: Curl Header Authentication
+    id: kingfisher.curl.2
+    pattern: '(?i)\bcurl\s.*(?:-H|--header)\s+[''"]Authorization:\s*(?:Bearer|Basic|Token)\s+(?P<TOKEN>[a-zA-Z0-9+/=_-]{20,})[''"]'
+    confidence: low
+    min_entropy: 3.5
+    references:
+      - https://curl.se/docs/manpage.html#-H
+    examples:
+      - 'curl -H ''Authorization: Basic YnJvd3Nlcjo='''
+      - 'curl -H "Authorization: Bearer cfcabd11c7ed9a41b1a3e063c32d5114"'
+      - 'curl -H "Authorization: Token 22cb987851bc5659229114c62e60c79abd0d2c08"'
diff --git a/data/rules/dropbox.yml b/data/rules/dropbox.yml
new file mode 100644
index 0000000..d7d4766
--- /dev/null
+++ b/data/rules/dropbox.yml
@@ -0,0 +1,34 @@
+rules:
+  - name: Dropbox API secret/key
+    id: kingfisher.dropbox.1
+    pattern: |
+      (?xi)
+      \b
+      sl\.
+      (
+        [A-Z0-9\-\_]{130,152}
+      )
+      \b
+    min_entropy: 3.3
+    confidence: medium
+    examples:
+      - 'curl -X POST https://api.dropboxapi.com/2/users/get_current_account --header "Authorization: Bearer sl.hAi61Jx1hs3XlhrnsCxnctrEmxK2Q-UK29hbdxxHyAykldSeHmipBAauxTzuBEIqt2jdyyUZw8kgY3t_ars-PNIPS27ySa1ab22132U3sUuqYTXHzf2XlvMxSesUhkzx2G11_9W1f-eo"'
+      - '  "access_token": "sl.AbX9y6Fe3AuH5o66-gmJpR032jwAwQPIVVzWXZNkdzcYT02akC2de219dZi6gxYPVnYPrpvISRSf9lxKWJzYLjtMPH-d9fo_0gXex7X37VIvpty4-G8f4-WX45AcEPfRnJJDwzv-",'
+      - 'curl -X POST https://api.dropboxapi.com/2/users/get_current_account --header "Authorization: Bearer sl.hAi61Jx1hs3XlhrnsCxnctrEmxK2Q-UK29hbdxxHyAykldSeHmipBAauxTzuBEIqt2jdyyUZw8kgY3t_ars-PNIPS27ySa1ab22132U3sUuqYTXHzf2XlvMxSesUhkzx2G11_9W1f-eo"'
+      - '  "access_token": "sl.AbX9y6Fe3AuH5o66-gmJpR032jwAwQPIVVzWXZNkdzcYT02akC2de219dZi6gxYPVnYPrpvISRSf9lxKWJzYLjtMPH-d9fo_0gXex7X37VIvpty4-G8f4-WX45AcEPfRnJJDwzv-",'
+      - sl.lMcWXvCOCR9yRAOXwDg1V_VTsbEXdu3Xpsgg35GQTrDahoIuUnij4H5b6bMnwobZx4XnniaQappZU9j-CCWd-LYW81juiU04-yvLhOPV47Nj7Fs8XSE-CweZp6j9nw4E2oWWJ5
+    validation:
+      type: Http
+      content:
+        request:
+          headers:
+            Authorization: Bearer {{ TOKEN }}
+          method: POST
+          response_matcher:
+            - report_response: true
+            - match_all_words: true
+              type: WordMatch
+              words:
+                - '"account_id":'
+                - '"email":'
+          url: https://api.dropboxapi.com/2/users/get_current_account
\ No newline at end of file
diff --git a/data/rules/flyio.yml b/data/rules/flyio.yml
new file mode 100644
index 0000000..98b3a6a
--- /dev/null
+++ b/data/rules/flyio.yml
@@ -0,0 +1,36 @@
+rules:
+  - name: Fly.io API Token
+    id: kingfisher.flyio.1
+    pattern: |
+      (?x)
+      \b
+      (
+        FlyV1\s[A-Za-z0-9=_\-,/+]{100,}
+      )
+      \b
+    confidence: medium
+    min_entropy: 4.0
+    validation:
+      type: Http
+      content:
+        request:
+          method: POST
+          url: "https://api.fly.io/graphql"
+          headers:
+            Authorization: "Bearer {{TOKEN}}"
+            Content-Type: "application/json"
+          body: '{"query":"query { viewer { id email name } }"}'
+          response_matcher:
+            - report_response: true
+            - type: StatusMatch
+              status: [200]
+            - type: WordMatch
+              words:
+                - '"data":'
+                - '"viewer":'
+                - '"email":'
+              match_all_words: true
+    references:
+      - https://fly.io/docs/reference/graphql/
+    examples:
+      - "FlyV1 fm2_lJPECAAAAAAACcIGxBBr3eFBrCTMuIb8FOeUWTf0wrVodHRwczovL2FwaS5mbHkuaW8vdjGUAJLOABLVch8Lk7lodHRwczovL2FwaS5mbHkuaW8vYWFhL3YxxDymEU+hbM4EZ6KeG6k1EWHesm6buoSgwBS8yBSLRiHumjZXcxZdCJ2gJ3PN//X8DKdsEFfZyS03lbJtPpwETgpeWpRbsMxfQb2ZkR4zYNi/IOOKYxW2h6DYBHahN3DBS7wY54AIgap8IMAtBJ3imo77+vAeAeZ/0aPq3XJoGdg4+WHDWkxectcZoZROe8Qgnq4tV2yiT2Mx5wmoK+Kw1u33egtwLCEBDC5ZakEM7pI=,fm2_lJPETgpeWpRbsMxfQb2ZkR4zYNi/IOOKYxW2h6DYBHahN3DBS7wY54AIgap8IMAtBJ3imo77+vAeAeZ/0aPq3XJoGdg4+WHDWkxectcZoZROe8QQCY7oFTr+3MOM0p5/Cww1AsO5aHR0cHM6Ly9hcGkuZmx5LmlvL2FhYS92MZgEks5ooPjrzwAAAAEkmRcJF84AEhmjCpHOABIZowzEEMLj9PMThJElQN/ARptX7D3EILDtbLx/4cBgt6fX+zb6/FxsLxV2A/y4e4BeU1SunG+O"