diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 2644182e..3b134818 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -17,7 +17,7 @@
 /workflows/ @smartcontractkit/foundations @smartcontractkit/core @smartcontractkit/op-tooling
 /billing/ @smartcontractkit/cre-business @smartcontractkit/core @smartcontractkit/op-tooling
 /storage-service/ @smartcontractkit/dev-services @smartcontractkit/op-tooling
-/.github/workflows/cre-validations.yml @smartcontractkit/keystone @smartcontractkit/op-tooling
+/.github/workflows/cre-*.yml @smartcontractkit/keystone @smartcontractkit/op-tooling
 /linking-service/ @smartcontractkit/cre-business @smartcontractkit/core @smartcontractkit/op-tooling
 
 # Data
diff --git a/.github/workflows/cre-add-evm-chain.yml b/.github/workflows/cre-add-evm-chain.yml
new file mode 100644
index 00000000..ff5967c7
--- /dev/null
+++ b/.github/workflows/cre-add-evm-chain.yml
@@ -0,0 +1,139 @@
+# Adds a new EVM chain to client.proto and creates a PR.
+#
+# Usage:
+#   1. Manual: Actions tab → "Add EVM Chain" → Enter selector → Run
+#   2. From another workflow:
+#        jobs:
+#          add-chain:
+#            uses: ./.github/workflows/add-evm-chain.yml
+#            with:
+#              selector: "5009297550715157269"
+#   3. Via API:
+#        curl -X POST -H "Authorization: token $TOKEN" \
+#          -H "Accept: application/vnd.github.v3+json" \
+#          https://api.github.com/repos/OWNER/REPO/dispatches \
+#          -d '{"event_type":"add-evm-chain","client_payload":{"selector":"5009297550715157269"}}'
+#
+# Outputs:
+#   - Creates a PR adding the chain to cre/capabilities/blockchain/evm/v1alpha/client.proto
+#   - Annotation with chain name and PR link
+#   - Warning annotation if chain already exists
+name: Add EVM Chain
+
+on:
+  # Manual trigger from GitHub Actions UI
+  workflow_dispatch:
+    inputs:
+      selector:
+        description: 'Chain selector (uint64), e.g. 5009297550715157269 for ethereum-mainnet'
+        required: true
+        type: string
+
+  # Allows this workflow to be called from other workflows
+  workflow_call:
+    inputs:
+      selector:
+        description: 'Chain selector (uint64), e.g. 5009297550715157269 for ethereum-mainnet'
+        required: true
+        type: string
+
+  # Allows triggering via GitHub API with event_type "add-evm-chain"
+  repository_dispatch:
+    types: [add-evm-chain]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  add-chain:
+    runs-on: ubuntu-latest
+    # Resolve selector from inputs (workflow_dispatch/workflow_call) or client_payload (repository_dispatch)
+    env:
+      CHAIN_SELECTOR: ${{ inputs.selector || github.event.client_payload.selector }}
+    steps:
+      # Clone the repository so we can modify files and create a PR
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+
+      # Parse .tool-versions file to extract version numbers for Go, protoc, etc.
+      - name: Set tool versions
+        id: tool-versions
+        uses: smartcontractkit/tool-versions-to-env-action@aabd5efbaf28005284e846c5cf3a02f2cba2f4c2 # v1.0.8
+
+      # Install Go runtime using the version specified in .tool-versions
+      - name: Set up Go
+        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.0.0
+        with:
+          go-version: ${{ steps.tool-versions.outputs.golang_version }}
+
+      # Install asdf version manager and all plugins defined in .tool-versions
+      - name: Install asdf
+        uses: asdf-vm/actions/plugins-add@1902764435ca0dd2f3388eea723a4f92a4eb8302 # v3.0.2
+        with:
+          asdf_branch: v0.16.7
+
+      # Add asdf binaries and shims to PATH so installed tools are available
+      - name: Setup asdf environment
+        run: |
+          echo "$HOME/.asdf/bin" >> $GITHUB_PATH
+          echo "$HOME/.asdf/shims" >> $GITHUB_PATH
+
+      # Install the protobuf compiler using the version from .tool-versions
+      - name: Install protoc
+        run: asdf install protoc
+
+      # Install the Go protobuf code generator plugin for protoc
+      - name: Install protoc-gen-go
+        run: go install google.golang.org/protobuf/cmd/protoc-gen-go@v${{ steps.tool-versions.outputs.protoc-gen-go_version }}
+
+      # Fetch the latest chain-selectors library which contains chain name mappings
+      - name: Update chain-selectors and download dependencies
+        working-directory: cre/go
+        run: |
+          go get github.com/smartcontractkit/chain-selectors@latest
+          go mod tidy
+
+      # Run the add-evm-chain tool to append the new chain entry to client.proto
+      - name: Add chain to proto
+        id: add-chain
+        working-directory: cre/go
+        run: |
+          OUTPUT=$(go run ./tools/add-evm-chain -selector $CHAIN_SELECTOR 2>&1)
+          echo "$OUTPUT"
+          # Extract chain name from "added <name> (selector: ...)" or "chain <name> already exists"
+          CHAIN_NAME=$(echo "$OUTPUT" | sed -n 's/^added \([^ ]*\) .*/\1/p; s/^chain \([^ ]*\) already exists/\1/p')
+          echo "chain_name=$CHAIN_NAME" >> $GITHUB_OUTPUT
+          # Warn if chain already exists
+          if echo "$OUTPUT" | grep -q "already exists"; then
+            echo "::warning title=Chain Already Exists::$CHAIN_NAME (selector: $CHAIN_SELECTOR) already exists"
+          fi
+
+      # Run go generate to update embedded_gen.go with the modified proto content
+      - name: Regenerate embedded files
+        working-directory: cre/go
+        run: go generate ./...
+
+      # Commit all changes and open a pull request for review
+      - name: Create PR
+        id: create-pr
+        uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: "feat(cre): add EVM chain"
+          title: "feat(cre): add EVM chain (selector: ${{ env.CHAIN_SELECTOR }})"
+          body: "Adds EVM chain with selector `${{ env.CHAIN_SELECTOR }}` to client.proto"
+          branch: add-evm-chain/${{ env.CHAIN_SELECTOR }}
+
+      # Output chain and PR details as GitHub Actions annotations and job summary
+      - name: Output summary
+        run: |
+          echo "::notice title=Chain Added::Chain: ${{ steps.add-chain.outputs.chain_name }} (selector: $CHAIN_SELECTOR)"
+          echo "::notice title=Pull Request::${{ steps.create-pr.outputs.pull-request-url }}"
+          echo "## 🔗 EVM Chain Added" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "| Field | Value |" >> $GITHUB_STEP_SUMMARY
+          echo "|-------|-------|" >> $GITHUB_STEP_SUMMARY
+          echo "| **Chain Name** | \`${{ steps.add-chain.outputs.chain_name }}\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| **Chain Selector** | \`$CHAIN_SELECTOR\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| **Pull Request** | ${{ steps.create-pr.outputs.pull-request-url }} |" >> $GITHUB_STEP_SUMMARY
+          echo "| **PR Number** | #${{ steps.create-pr.outputs.pull-request-number }} |" >> $GITHUB_STEP_SUMMARY
\ No newline at end of file
diff --git a/.github/workflows/cre-notify-cre-sdk-go.yml b/.github/workflows/cre-notify-cre-sdk-go.yml
new file mode 100644
index 00000000..c6a239ab
--- /dev/null
+++ b/.github/workflows/cre-notify-cre-sdk-go.yml
@@ -0,0 +1,103 @@
+# Dispatches to cre-sdk-go to bump chainlink-protos version when a PR is merged.
+# Uses the CRE Github Automation App (app_id: 2666290) for authentication.
+#
+# Required Organization Secrets:
+#   - CRE_GH_AUTOMATION_APP_ID: GitHub App ID
+#   - CRE_GH_AUTOMATION_APP_PRIVATE_KEY: GitHub App private key
+name: Notify cre-sdk-go
+
+permissions:
+  contents: read
+
+on:
+  # Manual trigger
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Override version (leave empty to calculate from current commit)'
+        required: false
+        type: string
+      skip_tagging:
+        description: 'Skip version tagging in cre-sdk-go'
+        required: false
+        type: boolean
+        default: false
+
+  pull_request:
+    types: [closed]
+    branches:
+      - main
+
+jobs:
+  dispatch:
+    # Run if manually triggered OR if the PR was merged (not just closed)
+    if: github.event_name == 'workflow_dispatch' || github.event.pull_request.merged == true
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        with:
+          ref: main
+          fetch-depth: 1
+
+      - name: Calculate pseudo-version
+        id: version
+        run: |
+          # Use input version if provided, otherwise calculate from commit
+          if [ -n "${{ inputs.version }}" ]; then
+            VERSION="${{ inputs.version }}"
+            echo "Using provided version: ${VERSION}"
+          else
+            # Get the merge commit info
+            TIMESTAMP=$(TZ=UTC git log -1 --format='%cd' --date=format:%Y%m%d%H%M%S)
+            SHORT_SHA=$(git rev-parse --short=12 HEAD)
+            VERSION="v0.0.0-${TIMESTAMP}-${SHORT_SHA}"
+            echo "Calculated version: ${VERSION}"
+          fi
+          echo "version=${VERSION}" >> $GITHUB_OUTPUT
+
+      - name: Generate GitHub App Token
+        id: generate-token
+        uses: actions/create-github-app-token@v1
+        with:
+          app-id: ${{ secrets.CRE_GH_AUTOMATION_APP_ID }}
+          private-key: ${{ secrets.CRE_GH_AUTOMATION_APP_PRIVATE_KEY }}
+          owner: smartcontractkit
+          repositories: cre-sdk-go
+
+      - name: Dispatch to cre-sdk-go
+        uses: peter-evans/repository-dispatch@ff45666b9427631e3450c54a1bcbee4d9ff4d7c0 # v3.0.0
+        with:
+          token: ${{ steps.generate-token.outputs.token }}
+          repository: smartcontractkit/cre-sdk-go
+          event-type: bump-chainlink-protos
+          client-payload: |
+            {
+              "version": "${{ steps.version.outputs.version }}",
+              "skip_tagging": ${{ inputs.skip_tagging == true }}
+            }
+
+      - name: Summary
+        run: |
+          DISPATCH_TIME=$(date -u +"%Y-%m-%d %H:%M:%S UTC")
+          
+          echo "## 🚀 Dispatch Summary" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "### Target" >> $GITHUB_STEP_SUMMARY
+          echo "- **Repository:** [\`smartcontractkit/cre-sdk-go\`](https://github.com/smartcontractkit/cre-sdk-go)" >> $GITHUB_STEP_SUMMARY
+          echo "- **Workflow:** \`bump-chainlink-protos.yml\`" >> $GITHUB_STEP_SUMMARY
+          echo "- **Event Type:** \`bump-chainlink-protos\`" >> $GITHUB_STEP_SUMMARY
+          echo "- **Dispatched at:** ${DISPATCH_TIME}" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "### Payload" >> $GITHUB_STEP_SUMMARY
+          echo "| Parameter | Value |" >> $GITHUB_STEP_SUMMARY
+          echo "|-----------|-------|" >> $GITHUB_STEP_SUMMARY
+          echo "| version | \`${{ steps.version.outputs.version }}\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| skip_tagging | \`${{ inputs.skip_tagging == true }}\` |" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "### View Triggered Workflow" >> $GITHUB_STEP_SUMMARY
+          echo "👉 **[View bump-chainlink-protos runs](https://github.com/smartcontractkit/cre-sdk-go/actions/workflows/bump-chainlink-protos.yml?query=event%3Arepository_dispatch)**" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "_Look for the run started at approximately ${DISPATCH_TIME}_" >> $GITHUB_STEP_SUMMARY
+
+
diff --git a/cre/go/go.mod b/cre/go/go.mod
index c417f2f3..1cc49f3a 100644
--- a/cre/go/go.mod
+++ b/cre/go/go.mod
@@ -5,12 +5,14 @@ go 1.24.5
 require (
 	github.com/go-viper/mapstructure/v2 v2.4.0
 	github.com/shopspring/decimal v1.4.0
-	github.com/stretchr/testify v1.10.0
+	github.com/smartcontractkit/chain-selectors v1.0.89
+	github.com/stretchr/testify v1.11.1
 	google.golang.org/protobuf v1.36.7
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/mr-tron/base58 v1.2.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/cre/go/go.sum b/cre/go/go.sum
index e1ac1829..a0580bf6 100644
--- a/cre/go/go.sum
+++ b/cre/go/go.sum
@@ -4,12 +4,16 @@ github.com/go-viper/mapstructure/v2 v2.4.0 h1:EBsztssimR/CONLSZZ04E8qAkxNYq4Qp9L
 github.com/go-viper/mapstructure/v2 v2.4.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/mr-tron/base58 v1.2.0 h1:T/HDJBh4ZCPbU39/+c3rRvE0uKBQlU27+QI8LJ4t64o=
+github.com/mr-tron/base58 v1.2.0/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjWI2mNwc=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/shopspring/decimal v1.4.0 h1:bxl37RwXBklmTi0C79JfXCEBD1cqqHt0bbgBAGFp81k=
 github.com/shopspring/decimal v1.4.0/go.mod h1:gawqmDU56v4yIKSwfBSFip1HdCCXN8/+DMd9qYNcwME=
-github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
-github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/smartcontractkit/chain-selectors v1.0.89 h1:L9oWZGqQXWyTPnC6ODXgu3b0DFyLmJ9eHv+uJrE9IZY=
+github.com/smartcontractkit/chain-selectors v1.0.89/go.mod h1:qy7whtgG5g+7z0jt0nRyii9bLND9m15NZTzuQPkMZ5w=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/protobuf v1.36.7 h1:IgrO7UwFQGJdRNXH/sQux4R1Dj1WAKcLElzeeRaXV2A=
diff --git a/cre/go/tools/add-evm-chain/main.go b/cre/go/tools/add-evm-chain/main.go
new file mode 100644
index 00000000..8e8f729c
--- /dev/null
+++ b/cre/go/tools/add-evm-chain/main.go
@@ -0,0 +1,106 @@
+// Package main adds a new EVM chain selector to client.proto.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"regexp"
+	"sort"
+	"strconv"
+	"strings"
+
+	chain_selectors "github.com/smartcontractkit/chain-selectors"
+)
+
+const protoPath = "../capabilities/blockchain/evm/v1alpha/client.proto"
+
+func main() {
+	selector := flag.Uint64("selector", 0, "chain selector value (required)")
+	flag.Parse()
+
+	if *selector == 0 {
+		fatal("selector is required")
+	}
+
+	// Look up chain ID from selector
+	chainId, err := chain_selectors.ChainIdFromSelector(*selector)
+	if err != nil {
+		fatal("selector %d not found: %v", *selector, err)
+	}
+
+	// Get chain name from chain ID
+	chainName, err := chain_selectors.NameFromChainId(chainId)
+	if err != nil {
+		fatal("failed to get chain name for chain ID %d: %v", chainId, err)
+	}
+
+	// Read proto file
+	content, err := os.ReadFile(protoPath)
+	if err != nil {
+		fatal("failed to read %s: %v", protoPath, err)
+	}
+
+	// Check if already exists
+	if strings.Contains(string(content), fmt.Sprintf(`key: "%s"`, chainName)) {
+		fmt.Printf("chain %s already exists\n", chainName)
+		return
+	}
+
+	// Parse, add, sort, rebuild
+	newContent, err := addChain(string(content), chainName, *selector)
+	if err != nil {
+		fatal("failed to add chain: %v", err)
+	}
+
+	if err := os.WriteFile(protoPath, []byte(newContent), 0644); err != nil {
+		fatal("failed to write file: %v", err)
+	}
+
+	fmt.Printf("added %s (selector: %d)\n", chainName, *selector)
+}
+
+func addChain(content, name string, selector uint64) (string, error) {
+	// Find defaults array
+	re := regexp.MustCompile(`defaults:\s*\[([\s\S]*?)\n\s*\]`)
+	match := re.FindStringSubmatch(content)
+	if len(match) < 2 {
+		return "", fmt.Errorf("defaults array not found")
+	}
+
+	// Parse entries
+	entryRe := regexp.MustCompile(`\{\s*key:\s*"([^"]+)"\s*value:\s*(\d+)\s*\}`)
+	entries := entryRe.FindAllStringSubmatch(match[1], -1)
+
+	type entry struct {
+		key string
+		val uint64
+	}
+	var list []entry
+	for _, e := range entries {
+		v, _ := strconv.ParseUint(e[2], 10, 64)
+		list = append(list, entry{e[1], v})
+	}
+	list = append(list, entry{name, selector})
+
+	sort.Slice(list, func(i, j int) bool { return list[i].key < list[j].key })
+
+	var b strings.Builder
+	b.WriteString("defaults: [\n")
+	for i, e := range list {
+		b.WriteString(fmt.Sprintf("            {\n              key: \"%s\"\n              value: %d\n            }", e.key, e.val))
+		if i < len(list)-1 {
+			b.WriteString(",\n")
+		} else {
+			b.WriteString("\n")
+		}
+	}
+	b.WriteString("          ]")
+
+	return re.ReplaceAllString(content, b.String()), nil
+}
+
+func fatal(format string, args ...any) {
+	fmt.Fprintf(os.Stderr, "error: "+format+"\n", args...)
+	os.Exit(1)
+}