diff --git a/.github/workflows/check-standard.yaml b/.github/workflows/check-standard.yaml
index e9171039..704dcf0e 100644
--- a/.github/workflows/check-standard.yaml
+++ b/.github/workflows/check-standard.yaml
@@ -27,8 +27,8 @@ jobs:
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-      EARTHDATA_TOKEN: ${{ secrets.EARTHDATA_TOKEN }}
-      NASA_EARTHDATA_TOKEN: ${{ secrets.EARTHDATA_TOKEN }}
+      EARTHDATA_TOKEN: ${{ secrets.EARTHDATA_TOKEN || secrets.NASA_EARTHDATA_TOKEN }}
+      NASA_EARTHDATA_TOKEN: ${{ secrets.NASA_EARTHDATA_TOKEN || secrets.EARTHDATA_TOKEN }}
       R_KEEP_PKG_SOURCE: yes
 
     steps:
diff --git a/.github/workflows/test-coverage-local.yaml b/.github/workflows/test-coverage-local.yaml
index f547be09..8a3264d7 100644
--- a/.github/workflows/test-coverage-local.yaml
+++ b/.github/workflows/test-coverage-local.yaml
@@ -18,8 +18,8 @@ jobs:
     runs-on: ubuntu-latest
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-      EARTHDATA_TOKEN: ${{ secrets.EARTHDATA_TOKEN }}
-      NASA_EARTHDATA_TOKEN: ${{ secrets.EARTHDATA_TOKEN }}
+      EARTHDATA_TOKEN: ${{ secrets.EARTHDATA_TOKEN || secrets.NASA_EARTHDATA_TOKEN }}
+      NASA_EARTHDATA_TOKEN: ${{ secrets.NASA_EARTHDATA_TOKEN || secrets.EARTHDATA_TOKEN }}
 
     steps:
       - uses: actions/checkout@v4
diff --git a/.github/workflows/test-live.yaml b/.github/workflows/test-live.yaml
index 7807ac0f..f81b99cb 100644
--- a/.github/workflows/test-live.yaml
+++ b/.github/workflows/test-live.yaml
@@ -1,13 +1,13 @@
 # Scheduled live-API test workflow.
 #
-# Runs every Monday at 06:00 UTC, plus on-demand (with optional `filter`
+# Runs nightly at 06:00 UTC, plus on-demand (with optional `filter`
 # input). Sets AMADEUS_LIVE_TESTS=true so that `skip_if_no_live_tests()`
 # does not skip the `test-*-live.R` files. On failure, an issue is
 # auto-opened (label: live-test-failure) so repo watchers receive an
 # email notification.
 on:
   schedule:
-    - cron: '0 6 * * 1'
+    - cron: '0 6 * * *'
   workflow_dispatch:
     inputs:
       filter:
@@ -25,8 +25,8 @@ jobs:
       issues: write
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-      EARTHDATA_TOKEN: ${{ secrets.EARTHDATA_TOKEN }}
-      NASA_EARTHDATA_TOKEN: ${{ secrets.EARTHDATA_TOKEN }}
+      EARTHDATA_TOKEN: ${{ secrets.EARTHDATA_TOKEN || secrets.NASA_EARTHDATA_TOKEN }}
+      NASA_EARTHDATA_TOKEN: ${{ secrets.NASA_EARTHDATA_TOKEN || secrets.EARTHDATA_TOKEN }}
       AMADEUS_LIVE_TESTS: "true"
       NOT_CRAN: "true"
 
diff --git a/DESCRIPTION b/DESCRIPTION
index 70bbe0f3..2e024913 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: amadeus
 Title: Accessing and Analyzing Large-Scale Environmental Data
-Version: 2.0.0
+Version: 2.0.1
 Authors@R: c(
     person(given = "Mitchell", family = "Manware", role = c("aut", "ctb"), comment = c(ORCID = "0009-0003-6440-6106")),
     person(given = "Insang", family = "Song", role = c("aut", "ctb"), comment = c(ORCID = "0000-0001-8732-3256")),
diff --git a/R/download_auxiliary.R b/R/download_auxiliary.R
index 0e55f45a..596f0151 100644
--- a/R/download_auxiliary.R
+++ b/R/download_auxiliary.R
@@ -842,9 +842,9 @@ check_url_status <- function(
 ) {
   http_status_ok <- c(200, 206)
 
-  tryCatch(
+  status_head <- tryCatch(
     {
-      status <- url |>
+      url |>
         httr2::request() |>
         httr2::req_method("HEAD") |>
         httr2::req_error(is_error = \(resp) FALSE) |>
@@ -854,15 +854,34 @@ check_url_status <- function(
         ) |>
         httr2::req_perform() |>
         httr2::resp_status()
+    },
+    error = function(e) NA_integer_
+  )
+
+  if (!is.na(status_head) && status_head %in% http_status_ok) {
+    Sys.sleep(1)
+    return(TRUE)
+  }
 
-      Sys.sleep(1)
-      return(status %in% http_status_ok)
+  # Some hosts reject/flake on HEAD; probe with a tiny ranged GET.
+  status_get <- tryCatch(
+    {
+      url |>
+        httr2::request() |>
+        httr2::req_headers(Range = "bytes=0-0") |>
+        httr2::req_error(is_error = \(resp) FALSE) |>
+        httr2::req_retry(
+          max_tries = max_tries,
+          retry_on_failure = TRUE
+        ) |>
+        httr2::req_perform() |>
+        httr2::resp_status()
     },
-    error = function(e) {
-      # Return FALSE for any errors (network, DNS, SSL, etc.)
-      return(FALSE)
-    }
+    error = function(e) NA_integer_
   )
+
+  Sys.sleep(1)
+  !is.na(status_get) && status_get %in% http_status_ok
 }
 
 #' Import download commands
diff --git a/tests/testthat/test-edgar-live.R b/tests/testthat/test-edgar-live.R
index 3c1d6061..e4511004 100644
--- a/tests/testthat/test-edgar-live.R
+++ b/tests/testthat/test-edgar-live.R
@@ -10,7 +10,7 @@ testthat::test_that(
   {
     skip_if_no_live_tests()
     dir <- withr::local_tempdir()
-amadeus::download_edgar(
+    amadeus::download_edgar(
       species = "CO",
       version = "8.1",
       temp_res = "yearly",
@@ -35,7 +35,7 @@ testthat::test_that(
   {
     skip_if_no_live_tests()
     dir <- withr::local_tempdir()
-amadeus::download_edgar(
+    amadeus::download_edgar(
       species = "SO2",
       version = "8.1",
       temp_res = "monthly",
@@ -53,15 +53,15 @@ amadeus::download_edgar(
 
 testthat::test_that(
   paste0(
-    "download_edgar(version='8.1_voc', voc='01'): ",
+    "download_edgar(version='8.1_voc', voc='1'): ",
     "downloads VOC speciation file"
   ),
   {
     skip_if_no_live_tests()
     dir <- withr::local_tempdir()
-amadeus::download_edgar(
+    amadeus::download_edgar(
       version = "8.1_voc",
-      voc = "01",
+      voc = "1",
       format = "nc",
       output = "emi",
       directory_to_save = dir,
diff --git a/tests/testthat/test-modis-live.R b/tests/testthat/test-modis-live.R
index 45220955..6cf19d3a 100644
--- a/tests/testthat/test-modis-live.R
+++ b/tests/testthat/test-modis-live.R
@@ -9,13 +9,15 @@ testthat::test_that(
   ),
   {
     skip_if_no_live_tests()
-    testthat::skip_if(!nzchar(Sys.getenv("EARTHDATA_TOKEN")),
-                      "no Earthdata token")
+    testthat::skip_if(
+      !nzchar(Sys.getenv("NASA_EARTHDATA_TOKEN")),
+      "no Earthdata token"
+    )
     dir <- withr::local_tempdir()
     amadeus::download_modis(
       product = "MOD09GA",
       version = "061",
-      nasa_earth_data_token = Sys.getenv("EARTHDATA_TOKEN"),
+      nasa_earth_data_token = Sys.getenv("NASA_EARTHDATA_TOKEN"),
       date = c("2024-01-01", "2024-01-01"),
       extent = c(-79, 35, -78, 36),
       directory_to_save = dir,
@@ -34,13 +36,15 @@ testthat::test_that(
   ),
   {
     skip_if_no_live_tests()
-    testthat::skip_if(!nzchar(Sys.getenv("EARTHDATA_TOKEN")),
-                      "no Earthdata token")
+    testthat::skip_if(
+      !nzchar(Sys.getenv("NASA_EARTHDATA_TOKEN")),
+      "no Earthdata token"
+    )
     dir <- withr::local_tempdir()
     amadeus::download_modis(
       product = "MOD11A1",
       version = "061",
-      nasa_earth_data_token = Sys.getenv("EARTHDATA_TOKEN"),
+      nasa_earth_data_token = Sys.getenv("NASA_EARTHDATA_TOKEN"),
       date = c("2022-01-01", "2022-01-01"),
       extent = c(-79, 35, -78, 36),
       directory_to_save = dir,
@@ -59,13 +63,15 @@ testthat::test_that(
   ),
   {
     skip_if_no_live_tests()
-    testthat::skip_if(!nzchar(Sys.getenv("EARTHDATA_TOKEN")),
-                      "no Earthdata token")
+    testthat::skip_if(
+      !nzchar(Sys.getenv("NASA_EARTHDATA_TOKEN")),
+      "no Earthdata token"
+    )
     dir <- withr::local_tempdir()
     amadeus::download_modis(
       product = "MCD19A2",
       version = "061",
-      nasa_earth_data_token = Sys.getenv("EARTHDATA_TOKEN"),
+      nasa_earth_data_token = Sys.getenv("NASA_EARTHDATA_TOKEN"),
       date = c("2022-01-01", "2022-01-01"),
       extent = c(-79, 35, -78, 36),
       directory_to_save = dir,
@@ -79,18 +85,20 @@ testthat::test_that(
 
 testthat::test_that(
   paste0(
-    "download_modis(product='MOD06_L2', date=<single day>, extent=<NC>): ",
+    "download_modis(product='MOD06_L2', date=<month range>, extent=<NC>): ",
     "downloads cloud product file"
   ),
   {
     skip_if_no_live_tests()
-    testthat::skip_if(!nzchar(Sys.getenv("EARTHDATA_TOKEN")),
-                      "no Earthdata token")
+    testthat::skip_if(
+      !nzchar(Sys.getenv("NASA_EARTHDATA_TOKEN")),
+      "no Earthdata token"
+    )
     dir <- withr::local_tempdir()
     amadeus::download_modis(
       product = "MOD06_L2",
-      nasa_earth_data_token = Sys.getenv("EARTHDATA_TOKEN"),
-      date = c("2022-01-01", "2022-01-01"),
+      nasa_earth_data_token = Sys.getenv("NASA_EARTHDATA_TOKEN"),
+      date = c("2022-01-01", "2022-01-31"),
       extent = c(-79, 35, -78, 36),
       directory_to_save = dir,
       acknowledgement = TRUE