diff --git a/deploy/observability/otel-collector-config.yaml b/deploy/observability/otel-collector-config.yaml
index d62b574..aff3d9b 100644
--- a/deploy/observability/otel-collector-config.yaml
+++ b/deploy/observability/otel-collector-config.yaml
@@ -27,8 +27,9 @@ processors:
 
 exporters:
   # Forward logs and traces to the OpenObserve OTLP/HTTP endpoint.
+  # The /openobserve prefix matches ZO_BASE_URI in docker-compose.yml.
   otlphttp/openobserve:
-    endpoint: http://openobserve:5080/api/default
+    endpoint: http://openobserve:5080/openobserve/api/default
     headers:
       Authorization: Basic ${env:OPENOBSERVE_AUTH_TOKEN}
     tls:
@@ -36,7 +37,7 @@ exporters:
 
   # OpenObserve metrics are ingested via Prometheus remote-write.
   prometheusremotewrite/openobserve:
-    endpoint: http://openobserve:5080/api/default/prometheus/api/v1/write
+    endpoint: http://openobserve:5080/openobserve/api/default/prometheus/api/v1/write
     headers:
       Authorization: Basic ${env:OPENOBSERVE_AUTH_TOKEN}
     tls:
diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 687847b..9d68629 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -1396,10 +1396,11 @@ enforcing the adapter boundary even in dependency ordering.
 - The collector also scrapes Prometheus `/metrics` from `api:9100` and each
   worker (`:9101`/`:9102`/`:9104`/`:9105`/`:9103`).
 - `otlphttp/openobserve` exporter forwards logs and traces to
-  `http://openobserve:5080/api/default` using `OPENOBSERVE_AUTH_TOKEN`.
+  `http://openobserve:5080/openobserve/api/default` using `OPENOBSERVE_AUTH_TOKEN`
+  (the `/openobserve` prefix matches `ZO_BASE_URI`).
 - `prometheusremotewrite/openobserve` exporter forwards metrics to
-  `http://openobserve:5080/api/default/prometheus/api/v1/write` because
-  OpenObserve ingests metrics through the Prometheus remote-write path.
+  `http://openobserve:5080/openobserve/api/default/prometheus/api/v1/write`
+  because OpenObserve ingests metrics through the Prometheus remote-write path.
 - OpenObserve UI is exposed under `/openobserve/` via nginx.
 
 ### OpenTelemetry (`core/telemetry.py`)