diff --git a/.github/workflows/live-integration.yaml b/.github/workflows/live-integration.yaml
new file mode 100644
index 0000000..2323f95
--- /dev/null
+++ b/.github/workflows/live-integration.yaml
@@ -0,0 +1,54 @@
+name: Live Integration
+
+# Read-only integration tests against deployed Archive Node API endpoints on each
+# network. Scheduled (not on PRs) so schema/query drift against real data is
+# caught without slowing the PR loop. Endpoints come from repo variables; a
+# network with no configured URL is skipped, so this stays green until they're set.
+
+on:
+  schedule:
+    - cron: '0 5 * * *' # nightly
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  live-api:
+    name: live-api (${{ matrix.network }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        network: [devnet, mainnet, mesa]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+      - run: npm ci
+
+      - name: Resolve endpoint for ${{ matrix.network }}
+        id: endpoint
+        env:
+          DEVNET_URL: ${{ vars.DEVNET_ARCHIVE_API_URL }}
+          MAINNET_URL: ${{ vars.MAINNET_ARCHIVE_API_URL }}
+          MESA_URL: ${{ vars.MESA_ARCHIVE_API_URL }}
+        run: |
+          case "${{ matrix.network }}" in
+            devnet)  URL="$DEVNET_URL" ;;
+            mainnet) URL="$MAINNET_URL" ;;
+            mesa)    URL="$MESA_URL" ;;
+          esac
+          if [ -z "$URL" ]; then
+            echo "No endpoint configured for ${{ matrix.network }} (set the *_ARCHIVE_API_URL repo variable); skipping."
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "url=$URL" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Run live-api tests against ${{ matrix.network }}
+        if: steps.endpoint.outputs.skip != 'true'
+        env:
+          STAGING_GRAPHQL_ENDPOINT: ${{ steps.endpoint.outputs.url }}
+        run: npm run test:live-api
diff --git a/package.json b/package.json
index 3c71d02..f809b79 100644
--- a/package.json
+++ b/package.json
@@ -25,8 +25,9 @@
     "dev": "cross-env NODE_NO_WARNINGS=1 npx nodemon --exec 'node -r dotenv/config --loader ts-node/esm' src/index.ts",
     "test": "./run-tests.sh",
     "test:unit": "npm run build && (ec=0; for f in ./build/tests/unit/*test.js ./build/tests/utils.test.js ./build/tests/services/*/*.test.js; do node --enable-source-maps --test \"$f\" || ec=$?; done; exit $ec)",
-    "test:coverage": "npm run build && npx c8 --include 'build/src/**' --reporter text --reporter lcov -- bash -c 'ec=0; for f in ./build/tests/unit/*test.js ./build/tests/utils.test.js ./build/tests/services/*/*.test.js; do node --enable-source-maps --test \"$f\" || ec=$?; done; exit $ec'",
+    "test:coverage": "npm run build && npx c8 --include 'build/src/**' --check-coverage --lines 50 --functions 50 --statements 50 --branches 80 --reporter text --reporter lcov -- bash -c 'ec=0; for f in ./build/tests/unit/*test.js ./build/tests/utils.test.js ./build/tests/services/*/*.test.js; do node --enable-source-maps --test \"$f\" || ec=$?; done; exit $ec'",
     "test:integration": "npm run build && (ec=0; for f in ./build/tests/integration/*.test.js; do node --enable-source-maps --test \"$f\" || ec=$?; done; exit $ec)",
+    "test:live-api": "npm run build && node --enable-source-maps --test ./build/tests/live-api/*.test.js",
     "test:live-network": "npm run build && node --enable-source-maps --test-timeout 600000 --test ./build/tests/live-network/live-network.test.js",
     "test:devnet-dump": "npm run build && node --enable-source-maps --test-timeout 900000 --test ./build/tests/devnet-dump/devnet-dump.test.js",
     "clean": "rimraf ./build",
diff --git a/tests/live-api/README.md b/tests/live-api/README.md
index 5e2c816..e01389a 100644
--- a/tests/live-api/README.md
+++ b/tests/live-api/README.md
@@ -36,8 +36,33 @@ STAGING_GRAPHQL_ENDPOINT=http://localhost:4000 LIVE_API_TESTS=true npm test
 
 # Include pending-chain tests (requires DB access)
 PG_CONN=postgresql://user:pass@host:5432/archive LIVE_API_TESTS=true npm test
+
+# Run just the live-api suite directly against an endpoint
+STAGING_GRAPHQL_ENDPOINT=https://my-archive-api npm run test:live-api
 ```
 
+## Nightly multi-network runs (CI)
+
+The [`Live Integration`](../../.github/workflows/live-integration.yaml) workflow
+runs this suite nightly against **devnet, mainnet, and mesa** to catch schema or
+query drift against each network's real data without slowing the PR loop.
+
+Each network's endpoint is read from a repository variable; a network with no
+configured URL is skipped (so the job stays green until it's set):
+
+| Repo variable | Network |
+|---------------|---------|
+| `DEVNET_ARCHIVE_API_URL`  | devnet |
+| `MAINNET_ARCHIVE_API_URL` | mainnet |
+| `MESA_ARCHIVE_API_URL`    | mesa |
+
+Set them under **Settings → Secrets and variables → Actions → Variables**, or
+trigger the workflow manually from the Actions tab.
+
+> Note: `actions.test.ts` is still a placeholder — it needs a known mainnet/mesa
+> zkApp with actions to snapshot fixtures against. Filling that in (and adding a
+> successful-`zkappCommands` fixture) is the remaining piece of test coverage.
+
 ## Fixtures
 
 The `fixtures/` directory contains expected responses snapshotted from known-good API output. Each fixture file is named `<address>_<from>_<to>.json` corresponding to the query parameters used.