diff --git a/.github/workflows/frontend-json.yml b/.github/workflows/frontend-json.yml
new file mode 100644
index 00000000..4046a817
--- /dev/null
+++ b/.github/workflows/frontend-json.yml
@@ -0,0 +1,42 @@
+name: JSON validate Frontend service
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+       - 'frontend/pbtar_schema.json'
+       - 'frontend/src/data/scenarios_metadata.json'
+       - '.github/workflows/frontend-json.yml'
+  pull_request:
+    branches:
+      - main
+    paths:
+       - 'frontend/pbtar_schema.json'
+       - 'frontend/src/data/scenarios_metadata.json'
+       - '.github/workflows/frontend-json.yml'
+  workflow_dispatch:
+
+jobs:
+  lint:
+    name: "Run ajv JSON validator"
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: frontend/package-lock.json
+
+      - name: Install dependencies
+        working-directory: ./frontend
+        run: npm ci
+
+      - name: Run ajv JSON validator
+        working-directory: ./frontend
+        run: npm run json:check
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index c4021b1f..e64d47c2 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -16,6 +16,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^9.27.0",
+        "@jirutka/ajv-cli": "^6.0.0",
         "@tailwindcss/postcss": "^4.1.7",
         "@testing-library/jest-dom": "^6.6.3",
         "@testing-library/react": "^16.3.0",
@@ -1063,6 +1064,16 @@
         "url": "https://github.com/sponsors/nzakas"
       }
     },
+    "node_modules/@humanwhocodes/momoa": {
+      "version": "3.3.8",
+      "resolved": "https://registry.npmjs.org/@humanwhocodes/momoa/-/momoa-3.3.8.tgz",
+      "integrity": "sha512-/3PZzor2imi/RLLcnHztkwA79txiVvW145Ve2cp5dxRcH5qOUNJPToasqLFHniTfw4B4lT7jGDdBOPXbXYlIMQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@humanwhocodes/retry": {
       "version": "0.4.3",
       "resolved": "https://registry.npmjs.org/@humanwhocodes/retry/-/retry-0.4.3.tgz",
@@ -1089,6 +1100,84 @@
         "node": ">=18.0.0"
       }
     },
+    "node_modules/@jirutka/ajv-cli": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/@jirutka/ajv-cli/-/ajv-cli-6.0.0.tgz",
+      "integrity": "sha512-qQbBwIUltRLJow/E+H/ipga0pc4qcY31PDNM1RhkS+dn/hFDS+HuuEKEBBmACRj+uV8N07+ybskSgKBDujkmeg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@humanwhocodes/momoa": "^3.0.2",
+        "@json-schema-tools/traverse": "^1.10.4",
+        "ajv": "^8.13.0",
+        "chalk": "^5.3.0",
+        "damerau-levenshtein": "^1.0.8",
+        "fast-json-patch": "^3.1.0",
+        "picomatch": "^4.0.2",
+        "type-flag": "^3.0.0",
+        "yaml": "^2.4.5"
+      },
+      "bin": {
+        "ajv": "lib/main.js"
+      }
+    },
+    "node_modules/@jirutka/ajv-cli/node_modules/ajv": {
+      "version": "8.17.1",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.17.1.tgz",
+      "integrity": "sha512-B/gBuNg5SiMTrPkC+A2+cW0RszwxYmn6VYxB/inlBStS5nx6xHIt/ehKRhIMhqusl7a8LjQoZnjCs5vhwxOQ1g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "fast-deep-equal": "^3.1.3",
+        "fast-uri": "^3.0.1",
+        "json-schema-traverse": "^1.0.0",
+        "require-from-string": "^2.0.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
+    "node_modules/@jirutka/ajv-cli/node_modules/chalk": {
+      "version": "5.4.1",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-5.4.1.tgz",
+      "integrity": "sha512-zgVZuo2WcZgfUEmsn6eO3kINexW8RAE4maiQ8QNs8CtpPCSyMiYsULR3HQYkm3w8FIA3SberyMJMSldGsW+U3w==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^12.17.0 || ^14.13 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/chalk?sponsor=1"
+      }
+    },
+    "node_modules/@jirutka/ajv-cli/node_modules/fast-json-patch": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/fast-json-patch/-/fast-json-patch-3.1.1.tgz",
+      "integrity": "sha512-vf6IHUX2SBcA+5/+4883dsIjpBTqmfBjmYiWK1savxQmFk4JfBMLa7ynTYOs1Rolp/T1betJxHiGD3g1Mn8lUQ==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/@jirutka/ajv-cli/node_modules/json-schema-traverse": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
+      "integrity": "sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/@jirutka/ajv-cli/node_modules/picomatch": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.2.tgz",
+      "integrity": "sha512-M7BAV6Rlcy5u+m6oPhAPFgJTzAioX/6B0DxyvDlo9l8+T3nLKbrczg2WLUyzd45L8RqfUMyGPzekbMvX2Ldkwg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
     "node_modules/@jridgewell/gen-mapping": {
       "version": "0.3.8",
       "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.8.tgz",
@@ -1137,6 +1226,13 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@json-schema-tools/traverse": {
+      "version": "1.10.4",
+      "resolved": "https://registry.npmjs.org/@json-schema-tools/traverse/-/traverse-1.10.4.tgz",
+      "integrity": "sha512-9e42zjhLIxzBONroNC4SGsTqdB877tzwH2S6lqgTav9K24kWJR9vNieeMVSuyqnY8FlclH21D8wsm/tuD9WA9Q==",
+      "dev": true,
+      "license": "Apache-2.0"
+    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -2643,6 +2739,13 @@
       "integrity": "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw==",
       "dev": true
     },
+    "node_modules/damerau-levenshtein": {
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/damerau-levenshtein/-/damerau-levenshtein-1.0.8.tgz",
+      "integrity": "sha512-sdQSFB7+llfUcQHUQO3+B8ERRj0Oa4w9POWMI/puGtuf7gFywGmkaLCElnudfTiKZV+NvHqL0ifzdrI8Ro7ESA==",
+      "dev": true,
+      "license": "BSD-2-Clause"
+    },
     "node_modules/data-urls": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/data-urls/-/data-urls-5.0.0.tgz",
@@ -3030,6 +3133,23 @@
       "integrity": "sha512-DCXu6Ifhqcks7TZKY3Hxp3y6qphY5SJZmrWMDrKcERSOXWQdMhU9Ig/PYrzyw/ul9jOIyh0N4M0tbC5hodg8dw==",
       "dev": true
     },
+    "node_modules/fast-uri": {
+      "version": "3.0.6",
+      "resolved": "https://registry.npmjs.org/fast-uri/-/fast-uri-3.0.6.tgz",
+      "integrity": "sha512-Atfo14OibSv5wAp4VWNsFYE1AchQRTv9cBGWET4pZWHzYshFSS9NQI6I57rdKn9croWVMbYFbLhJ+yJvmZIIHw==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/fastify"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/fastify"
+        }
+      ],
+      "license": "BSD-3-Clause"
+    },
     "node_modules/fastq": {
       "version": "1.19.1",
       "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.19.1.tgz",
@@ -4212,6 +4332,16 @@
         "node": ">=8"
       }
     },
+    "node_modules/require-from-string": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/require-from-string/-/require-from-string-2.0.2.tgz",
+      "integrity": "sha512-Xf0nWe6RseziFMu+Ap9biiUbmplq6S9/p+7w7YXP/JBHhrUDDUhwa+vANyubuqfZWTveU//DYVGsDG7RKL/vEw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/resolve-from": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
@@ -4631,6 +4761,16 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/type-flag": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/type-flag/-/type-flag-3.0.0.tgz",
+      "integrity": "sha512-3YaYwMseXCAhBB14RXW5cRQfJQlEknS6i4C8fCfeUdS3ihG9EdccdR9kt3vP73ZdeTGmPb4bZtkDn5XMIn1DLA==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/privatenumber/type-flag?sponsor=1"
+      }
+    },
     "node_modules/typescript": {
       "version": "5.8.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
@@ -5034,6 +5174,19 @@
       "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==",
       "dev": true
     },
+    "node_modules/yaml": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.8.0.tgz",
+      "integrity": "sha512-4lLa/EcQCB0cJkyts+FpIRx5G/llPxfP6VQU5KByHEhLxY3IJCH0f0Hy1MHI8sClTvsIb8qwRJ6R/ZdlDJ/leQ==",
+      "dev": true,
+      "license": "ISC",
+      "bin": {
+        "yaml": "bin.mjs"
+      },
+      "engines": {
+        "node": ">= 14.6"
+      }
+    },
     "node_modules/yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
diff --git a/frontend/package.json b/frontend/package.json
index 5089b9c0..d96246d5 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -13,7 +13,8 @@
     "lint": "eslint .",
     "lint:fix": "eslint . --fix",
     "format": "prettier --write .",
-    "format:check": "prettier --check ."
+    "format:check": "prettier --check .",
+    "json:check": "ajv validate -s pbtar_schema.json src/data/scenarios_metadata.json"
   },
   "author": "RMI",
   "license": "MIT",
@@ -25,6 +26,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.27.0",
+    "@jirutka/ajv-cli": "^6.0.0",
     "@tailwindcss/postcss": "^4.1.7",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.3.0",
diff --git a/frontend/pbtar_schema.json b/frontend/pbtar_schema.json
new file mode 100644
index 00000000..b2666c08
--- /dev/null
+++ b/frontend/pbtar_schema.json
@@ -0,0 +1,103 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "pbtar_schema.json",
+  "title": "PBTAR Scenarios metadata Schema",
+  "description": "A schema for the scenarios metadata dataset in PBTAR",
+  "type": "array",
+  "items": {
+    "type": "object",
+    "properties": {
+      "id": {
+        "description": "The unique identifier for a scenario",
+        "type": "string"
+      },
+      "name": {
+        "description": "Name of the scenario",
+        "type": "string"
+      },
+      "description": {
+        "description": "Description of the scenario",
+        "type": "string"
+      },
+      "category": {
+        "description": "Category of the scenario",
+        "type": "string"
+      },
+      "target_year": {
+        "description": "Target year of the scenario",
+        "type": "string"
+      },
+      "target_temperature": {
+        "description": "Target temperature of the scenario",
+        "type": "string"
+      },
+      "regions": {
+        "description": "Regions that the scenario covers",
+        "type": "array",
+        "uniqueItems": true,
+        "items": {
+          "type": "string"
+        }
+      },
+      "sectors": {
+        "description": "Sectors that the scenario covers",
+        "type": "array",
+        "items": {
+          "enum": [
+            "Agriculture",
+            "Buildings",
+            "Coal",
+            "Industrial",
+            "Oil & Gas",
+            "Power",
+            "Renewables",
+            "Transport"
+          ]
+        }
+      },
+      "publisher": {
+        "description": "Publisher of the scenario",
+        "type": "string"
+      },
+      "published_date": {
+        "description": "Date that the scenario was published",
+        "type": "string"
+      },
+      "overview": {
+        "description": "Overview of the scenario",
+        "type": "string"
+      },
+      "expertRecommendation": {
+        "description": "Expert recommendation for the scenario",
+        "type": "string"
+      },
+      "dataSource": {
+        "description": "Data source for the scenario",
+        "type": "object",
+        "properties": {
+          "description": { "type": "string" },
+          "url": { "type": "string" },
+          "downloadAvailable": { "type": "boolean" }
+        },
+        "additionalProperties": false,
+        "required": ["description", "url", "downloadAvailable"]
+      }
+    },
+    "additionalProperties": false,
+    "required": [
+      "id",
+      "name",
+      "description",
+      "category",
+      "target_year",
+      "target_temperature",
+      "regions",
+      "sectors",
+      "publisher",
+      "published_date",
+      "overview",
+      "expertRecommendation",
+      "dataSource"
+    ]
+  }
+}