diff --git a/.env.example b/.env.example
index 26d6ee99e7..68cebdba87 100644
--- a/.env.example
+++ b/.env.example
@@ -1205,6 +1205,20 @@ APP_LOG_TO_FILE=true
 # Used by: open-sse/executors/cloudflare-ai.ts
 # CLOUDFLARE_ACCOUNT_ID=
 
+# ── Deno Deploy proxy relay (#4643 / 9router#1437) ──
+# Override the Deno Deploy REST API base used by the proxy-pool relay deployer.
+# Default: https://api.deno.com/v2 (omit unless mocking).
+# Used by: src/app/api/settings/proxy/deno-deploy/route.ts
+# DENO_DEPLOY_API_BASE=https://api.deno.com/v2
+
+# Default Deno Deploy app name suggested in the "Deploy Relay" modal.
+# Used by: src/app/(dashboard)/dashboard/settings/components/proxy/DenoRelayModal.tsx
+# NEXT_PUBLIC_DENO_RELAY_DEFAULT_PROJECT=omniroute-deno-relay
+
+# Set to "false" to hide the Deno Deploy relay option from the Proxy Pool tab.
+# Used by: src/app/(dashboard)/dashboard/settings/components/proxy/ProxyPoolTab.tsx
+# NEXT_PUBLIC_DENO_RELAY_ENABLED=true
+
 # ── Cloudflare Tunnel (cloudflared) ──
 # Custom path to cloudflared binary for tunnel management.
 # Used by: src/lib/cloudflaredTunnel.ts
diff --git a/docs/reference/ENVIRONMENT.md b/docs/reference/ENVIRONMENT.md
index ad9a789b52..6aa926c11d 100644
--- a/docs/reference/ENVIRONMENT.md
+++ b/docs/reference/ENVIRONMENT.md
@@ -746,6 +746,9 @@ Automatic model pricing data synchronization from external sources.
 | `AWS_DEFAULT_REGION`                      | _(unset)_          | `src/lib/providers/validation.ts`, `open-sse/handlers/audioSpeech.ts` | Fallback when `AWS_REGION` is not set.                                                                      |
 | `CLOUDFLARE_ACCOUNT_ID`                   | _(unset)_          | `open-sse/executors/cloudflare-ai.ts`                                 | Account ID for Cloudflare Workers AI.                                                                       |
 | `CLOUDFLARED_BIN`                         | auto-detect        | `src/lib/cloudflaredTunnel.ts`                                        | Custom path to `cloudflared` binary.                                                                        |
+| `DENO_DEPLOY_API_BASE`                    | `https://api.deno.com/v2` | `src/app/api/settings/proxy/deno-deploy/route.ts`              | Override the Deno Deploy REST API base used by the proxy-pool relay deployer (#4643 / 9router#1437).        |
+| `NEXT_PUBLIC_DENO_RELAY_DEFAULT_PROJECT`  | `omniroute-deno-relay` | `src/app/(dashboard)/dashboard/settings/components/proxy/DenoRelayModal.tsx` | Default Deno Deploy app name suggested in the proxy-pool "Deploy Relay" modal.                              |
+| `NEXT_PUBLIC_DENO_RELAY_ENABLED`          | `true`             | `src/app/(dashboard)/dashboard/settings/components/proxy/ProxyPoolTab.tsx` | Set to `false` to hide the Deno Deploy relay option from the Proxy Pool tab.                                |
 | `SEARCH_CACHE_TTL_MS`                     | `300000` (5 min)   | `open-sse/services/searchCache.ts`                                    | TTL for search API (Perplexity, Brave, etc.) response caching.                                              |
 | `ALLOW_MULTI_CONNECTIONS_PER_COMPAT_NODE` | `false`            | `src/app/api/providers/route.ts`                                      | Allow multiple simultaneous connections per OpenAI-compatible provider.                                     |
 | `ENABLE_CC_COMPATIBLE_PROVIDER`           | `false`            | `src/shared/utils/featureFlags.ts`                                    | Reveal the experimental CC-compatible provider UI for Claude Code-only relays.                              |