diff --git a/apps/coordinator-api/.env.example b/apps/coordinator-api/.env.example
index c19dd65b..8a672d1c 100644
--- a/apps/coordinator-api/.env.example
+++ b/apps/coordinator-api/.env.example
@@ -2,9 +2,9 @@ APP_ENV=dev
 APP_HOST=127.0.0.1
 APP_PORT=8011
 DATABASE_URL=sqlite:///./coordinator.db
-CLIENT_API_KEYS=REDACTED_CLIENT_KEY,client_dev_key_2
-MINER_API_KEYS=REDACTED_MINER_KEY,miner_dev_key_2
-ADMIN_API_KEYS=REDACTED_ADMIN_KEY
+CLIENT_API_KEYS=${CLIENT_API_KEY},client_dev_key_2
+MINER_API_KEYS=${MINER_API_KEY},miner_dev_key_2
+ADMIN_API_KEYS=${ADMIN_API_KEY}
 HMAC_SECRET=change_me
 ALLOW_ORIGINS=*
 JOB_TTL_SECONDS=900
diff --git a/apps/coordinator-api/src/app/config.py b/apps/coordinator-api/src/app/config.py
index 1e65325d..cdb545bb 100644
--- a/apps/coordinator-api/src/app/config.py
+++ b/apps/coordinator-api/src/app/config.py
@@ -11,9 +11,9 @@ class Settings(BaseSettings):
 
     database_url: str = "sqlite:///./coordinator.db"
 
-    client_api_keys: List[str] = ["REDACTED_CLIENT_KEY"]
-    miner_api_keys: List[str] = ["REDACTED_MINER_KEY"]
-    admin_api_keys: List[str] = ["REDACTED_ADMIN_KEY"]
+    client_api_keys: List[str] = []
+    miner_api_keys: List[str] = []
+    admin_api_keys: List[str] = []
 
     hmac_secret: Optional[str] = None
     allow_origins: List[str] = ["*"]
diff --git a/apps/coordinator-api/tests/test_client_receipts.py b/apps/coordinator-api/tests/test_client_receipts.py
index c57306d2..2264a0e3 100644
--- a/apps/coordinator-api/tests/test_client_receipts.py
+++ b/apps/coordinator-api/tests/test_client_receipts.py
@@ -26,7 +26,7 @@ def test_receipt_endpoint_returns_signed_receipt(test_client: TestClient):
     resp = test_client.post(
         "/v1/miners/register",
         json={"capabilities": {"price": 1}, "concurrency": 1},
-        headers={"X-Api-Key": "REDACTED_MINER_KEY"},
+        headers={"X-Api-Key": "${MINER_API_KEY}"},
     )
     assert resp.status_code == 200
 
@@ -37,7 +37,7 @@ def test_receipt_endpoint_returns_signed_receipt(test_client: TestClient):
     resp = test_client.post(
         "/v1/jobs",
         json=job_payload,
-        headers={"X-Api-Key": "REDACTED_CLIENT_KEY"},
+        headers={"X-Api-Key": "${CLIENT_API_KEY}"},
     )
     assert resp.status_code == 201
     job_id = resp.json()["job_id"]
@@ -46,7 +46,7 @@ def test_receipt_endpoint_returns_signed_receipt(test_client: TestClient):
     poll_resp = test_client.post(
         "/v1/miners/poll",
         json={"max_wait_seconds": 1},
-        headers={"X-Api-Key": "REDACTED_MINER_KEY"},
+        headers={"X-Api-Key": "${MINER_API_KEY}"},
     )
     assert poll_resp.status_code in (200, 204)
 
@@ -58,7 +58,7 @@ def test_receipt_endpoint_returns_signed_receipt(test_client: TestClient):
     result_resp = test_client.post(
         f"/v1/miners/{job_id}/result",
         json=result_payload,
-        headers={"X-Api-Key": "REDACTED_MINER_KEY"},
+        headers={"X-Api-Key": "${MINER_API_KEY}"},
     )
     assert result_resp.status_code == 200
     signed_receipt = result_resp.json()["receipt"]
@@ -67,7 +67,7 @@ def test_receipt_endpoint_returns_signed_receipt(test_client: TestClient):
     # fetch receipt via client endpoint
     receipt_resp = test_client.get(
         f"/v1/jobs/{job_id}/receipt",
-        headers={"X-Api-Key": "REDACTED_CLIENT_KEY"},
+        headers={"X-Api-Key": "${CLIENT_API_KEY}"},
     )
     assert receipt_resp.status_code == 200
     payload = receipt_resp.json()
diff --git a/apps/trade-exchange/index.html b/apps/trade-exchange/index.html
index 14499a2d..ca8996a4 100644
--- a/apps/trade-exchange/index.html
+++ b/apps/trade-exchange/index.html
@@ -812,7 +812,7 @@
                 // Display demo offers
                 displayGPUOffers([{
                     id: '1',
-                    provider: 'REDACTED_MINER_KEY',
+                    provider: '${MINER_API_KEY}',
                     capacity: 1,
                     price: 50,
                     attributes: {
diff --git a/apps/wallet-daemon/src/app/settings.py b/apps/wallet-daemon/src/app/settings.py
index e53b645f..4935d247 100644
--- a/apps/wallet-daemon/src/app/settings.py
+++ b/apps/wallet-daemon/src/app/settings.py
@@ -13,7 +13,7 @@ class Settings(BaseSettings):
     debug: bool = Field(default=False)
 
     coordinator_base_url: str = Field(default="http://localhost:8011", alias="COORDINATOR_BASE_URL")
-    coordinator_api_key: str = Field(default="REDACTED_CLIENT_KEY", alias="COORDINATOR_API_KEY")
+    coordinator_api_key: str = Field(default="${CLIENT_API_KEY}", alias="COORDINATOR_API_KEY")
 
     rest_prefix: str = Field(default="/v1", alias="REST_PREFIX")
     ledger_db_path: Path = Field(default=Path("./data/wallet_ledger.db"), alias="LEDGER_DB_PATH")
diff --git a/cli/README.md b/cli/README.md
index 68175b12..46fcb695 100644
--- a/cli/README.md
+++ b/cli/README.md
@@ -105,8 +105,8 @@ python3 client.py --url http://localhost:8000 --api-key your_key submit inferenc
 ```
 
 Default credentials:
-- Client API Key: `REDACTED_CLIENT_KEY`
-- Miner API Key: `REDACTED_MINER_KEY`
+- Client API Key: `${CLIENT_API_KEY}`
+- Miner API Key: `${MINER_API_KEY}`
 
 ## Examples
 
diff --git a/cli/client.py b/cli/client.py
index d07f7838..ae7400fc 100755
--- a/cli/client.py
+++ b/cli/client.py
@@ -12,7 +12,7 @@ from typing import Optional
 
 # Configuration
 DEFAULT_COORDINATOR = "http://127.0.0.1:18000"
-DEFAULT_API_KEY = "REDACTED_CLIENT_KEY"
+DEFAULT_API_KEY = "${CLIENT_API_KEY}"
 
 class AITBCClient:
     def __init__(self, coordinator_url: str, api_key: str):
diff --git a/cli/miner.py b/cli/miner.py
index 2cebfa0c..6f2adb7a 100755
--- a/cli/miner.py
+++ b/cli/miner.py
@@ -13,7 +13,7 @@ from typing import Optional
 
 # Configuration
 DEFAULT_COORDINATOR = "http://localhost:8001"
-DEFAULT_API_KEY = "REDACTED_MINER_KEY"
+DEFAULT_API_KEY = "${MINER_API_KEY}"
 DEFAULT_MINER_ID = "cli-miner"
 
 class AITBCMiner:
diff --git a/cli/miner_gpu_test.py b/cli/miner_gpu_test.py
index 7e50644b..a7bc54bf 100755
--- a/cli/miner_gpu_test.py
+++ b/cli/miner_gpu_test.py
@@ -11,7 +11,7 @@ import sys
 
 # Configuration
 DEFAULT_COORDINATOR = "http://localhost:8001"
-DEFAULT_API_KEY = "REDACTED_MINER_KEY"
+DEFAULT_API_KEY = "${MINER_API_KEY}"
 DEFAULT_MINER_ID = "localhost-gpu-miner"
 
 def test_miner_registration(coordinator_url):
@@ -72,7 +72,7 @@ def test_job_processing(coordinator_url):
                 f"{coordinator_url}/v1/jobs",
                 headers={
                     "Content-Type": "application/json",
-                    "X-Api-Key": "REDACTED_CLIENT_KEY"
+                    "X-Api-Key": "${CLIENT_API_KEY}"
                 },
                 json={
                     "payload": {
diff --git a/cli/test_ollama_blockchain.py b/cli/test_ollama_blockchain.py
index d3bec196..a2e9f234 100755
--- a/cli/test_ollama_blockchain.py
+++ b/cli/test_ollama_blockchain.py
@@ -19,7 +19,7 @@ import httpx
 # Configuration
 DEFAULT_COORDINATOR = "http://127.0.0.1:18000"
 DEFAULT_BLOCKCHAIN = "http://127.0.0.1:19000"
-DEFAULT_API_KEY = "REDACTED_CLIENT_KEY"
+DEFAULT_API_KEY = "${CLIENT_API_KEY}"
 DEFAULT_PROMPT = "What is the capital of France?"
 DEFAULT_MODEL = "llama3.2:latest"
 DEFAULT_TIMEOUT = 180
@@ -150,7 +150,7 @@ def main() -> int:
     # Check miner registration
     print("\n📋 Checking miner registration...")
     with httpx.Client() as client:
-        miner_info = get_miner_info(client, args.coordinator_url, "REDACTED_ADMIN_KEY")
+        miner_info = get_miner_info(client, args.coordinator_url, "${ADMIN_API_KEY}")
         if miner_info:
             print(f"✅ Found registered miner: {miner_info.get('miner_id')}")
             print(f"   Status: {miner_info.get('status')}")
diff --git a/cli/test_ollama_gpu_provider.py b/cli/test_ollama_gpu_provider.py
index a6afe0c7..a2215c5b 100644
--- a/cli/test_ollama_gpu_provider.py
+++ b/cli/test_ollama_gpu_provider.py
@@ -12,7 +12,7 @@ from typing import Optional
 import httpx
 
 DEFAULT_COORDINATOR = "http://127.0.0.1:18000"
-DEFAULT_API_KEY = "REDACTED_CLIENT_KEY"
+DEFAULT_API_KEY = "${CLIENT_API_KEY}"
 DEFAULT_PROMPT = "hello"
 DEFAULT_TIMEOUT = 180
 POLL_INTERVAL = 3
diff --git a/docs/developer/api-authentication.md b/docs/developer/api-authentication.md
index 3ce0f1ac..33ebf8a1 100644
--- a/docs/developer/api-authentication.md
+++ b/docs/developer/api-authentication.md
@@ -17,8 +17,8 @@ All AITBC API endpoints require authentication using API keys.
 
 ### Testing/Development
 For integration tests and development, these test keys are available:
-- `REDACTED_CLIENT_KEY` - For client API access
-- `REDACTED_MINER_KEY` - For miner registration
+- `${CLIENT_API_KEY}` - For client API access
+- `${MINER_API_KEY}` - For miner registration
 - `test-tenant` - Default tenant ID for testing
 
 ## Using API Keys
diff --git a/docs/done.md b/docs/done.md
index 9336faf4..73e7c2f4 100644
--- a/docs/done.md
+++ b/docs/done.md
@@ -271,7 +271,7 @@ This document tracks components that have been successfully deployed and are ope
   - Result submission now returns 200 OK instead of 500 Internal Server Error
 
 - ✅ **Miner Configuration Fix**
-  - Updated miner ID from `host-gpu-miner` to `REDACTED_MINER_KEY` for proper job assignment
+  - Updated miner ID from `host-gpu-miner` to `${MINER_API_KEY}` for proper job assignment
   - Added explicit flush logging handler for better systemd journal visibility
   - Enhanced systemd unit with unbuffered logging environment variables
 
diff --git a/docs/flowchart.md b/docs/flowchart.md
index 9ee49bb9..6803fa15 100644
--- a/docs/flowchart.md
+++ b/docs/flowchart.md
@@ -25,7 +25,7 @@ This document illustrates the complete flow of a job submission through the CLI
 1. Bash script (`aitbc-cli.sh`) parses arguments
 2. Sets environment variables:
    - `AITBC_URL=http://127.0.0.1:18000`
-   - `CLIENT_KEY=REDACTED_CLIENT_KEY`
+   - `CLIENT_KEY=${CLIENT_API_KEY}`
 3. Calls Python client: `python3 cli/client.py --url $AITBC_URL --api-key $CLIENT_KEY submit inference --prompt "..."`
 
 ### 2. Python Client Processing
@@ -40,7 +40,7 @@ This document illustrates the complete flow of a job submission through the CLI
      "type": "inference",
      "prompt": "What is machine learning?",
      "model": "llama3.2:latest",
-     "client_key": "REDACTED_CLIENT_KEY",
+     "client_key": "${CLIENT_API_KEY}",
      "timestamp": "2025-01-29T14:50:00Z"
    }
    ```
@@ -52,7 +52,7 @@ This document illustrates the complete flow of a job submission through the CLI
 POST /v1/jobs
 Host: 127.0.0.1:18000
 Content-Type: application/json
-X-Api-Key: REDACTED_CLIENT_KEY
+X-Api-Key: ${CLIENT_API_KEY}
 
 {
   "type": "inference",
@@ -84,7 +84,7 @@ X-Api-Key: REDACTED_CLIENT_KEY
    {
      "type": "submit_job",
      "job_id": "job_123456",
-     "client": "REDACTED_CLIENT_KEY",
+     "client": "${CLIENT_API_KEY}",
      "payload_hash": "abc123...",
      "reward": "100aitbc"
    }
@@ -110,14 +110,14 @@ X-Api-Key: REDACTED_CLIENT_KEY
 2. Miner selection algorithm runs:
    - Check available miners
    - Select based on stake, reputation, capacity
-3. Selected miner: `REDACTED_MINER_KEY`
+3. Selected miner: `${MINER_API_KEY}`
 
 **Coordinator → Miner Daemon (Port 18001):**
 ```http
 POST /v1/jobs/assign
 Host: 127.0.0.1:18001
 Content-Type: application/json
-X-Api-Key: REDACTED_ADMIN_KEY
+X-Api-Key: ${ADMIN_API_KEY}
 
 {
   "job_id": "job_123456",
@@ -183,7 +183,7 @@ Content-Type: application/json
 POST /v1/jobs/job_123456/complete
 Host: 127.0.0.1:18000
 Content-Type: application/json
-X-Miner-Key: REDACTED_MINER_KEY
+X-Miner-Key: ${MINER_API_KEY}
 
 {
   "job_id": "job_123456",
@@ -210,8 +210,8 @@ X-Miner-Key: REDACTED_MINER_KEY
    {
      "receipt_id": "receipt_789",
      "job_id": "job_123456",
-     "client": "REDACTED_CLIENT_KEY",
-     "miner": "REDACTED_MINER_KEY",
+     "client": "${CLIENT_API_KEY}",
+     "miner": "${MINER_API_KEY}",
      "amount_paid": "0.25aitbc",
      "result_hash": "hash_of_result",
      "block_height": 12345,
@@ -244,7 +244,7 @@ X-Miner-Key: REDACTED_MINER_KEY
 ```http
 GET /v1/jobs/job_123456
 Host: 127.0.0.1:18000
-X-Api-Key: REDACTED_CLIENT_KEY
+X-Api-Key: ${CLIENT_API_KEY}
 ```
 
 **Response:**
diff --git a/docs/operator/deployment/nginx-domain-setup.md b/docs/operator/deployment/nginx-domain-setup.md
index 6c1fef9e..285f9411 100644
--- a/docs/operator/deployment/nginx-domain-setup.md
+++ b/docs/operator/deployment/nginx-domain-setup.md
@@ -117,7 +117,7 @@ incus exec aitbc -- systemctl reload nginx
 ```bash
 # Check each service
 curl -k https://aitbc.bubuit.net/api/health
-curl -k https://aitbc.bubuit.net/admin/stats -H "X-Api-Key: REDACTED_ADMIN_KEY"
+curl -k https://aitbc.bubuit.net/admin/stats -H "X-Api-Key: ${ADMIN_API_KEY}"
 curl -k https://aitbc.bubuit.net/rpc/head
 ```
 
diff --git a/docs/operator/deployment/run.md b/docs/operator/deployment/run.md
index dfccb006..aaa78a74 100644
--- a/docs/operator/deployment/run.md
+++ b/docs/operator/deployment/run.md
@@ -69,7 +69,7 @@ These instructions cover the newly scaffolded services. Install dependencies usi
    python - <<'PY'
    from aitbc_sdk import CoordinatorReceiptClient, verify_receipt
 
-   client = CoordinatorReceiptClient("http://localhost:8011", "REDACTED_CLIENT_KEY")
+   client = CoordinatorReceiptClient("http://localhost:8011", "${CLIENT_API_KEY}")
    receipt = client.fetch_latest("<job_id>")
    verification = verify_receipt(receipt)
    print("miner signature valid:", verification.miner_signature.valid)
diff --git a/docs/reference/bootstrap/coordinator_api.md b/docs/reference/bootstrap/coordinator_api.md
index 5ff7cda7..3780b9d8 100644
--- a/docs/reference/bootstrap/coordinator_api.md
+++ b/docs/reference/bootstrap/coordinator_api.md
@@ -74,9 +74,9 @@ DATABASE_URL=sqlite:///./coordinator.db
 # or: DATABASE_URL=postgresql://user:pass@localhost:5432/aitbc
 
 # Auth
-CLIENT_API_KEYS=REDACTED_CLIENT_KEY,client_dev_key_2
-MINER_API_KEYS=REDACTED_MINER_KEY,miner_dev_key_2
-ADMIN_API_KEYS=REDACTED_ADMIN_KEY
+CLIENT_API_KEYS=${CLIENT_API_KEY},client_dev_key_2
+MINER_API_KEYS=${MINER_API_KEY},miner_dev_key_2
+ADMIN_API_KEYS=${ADMIN_API_KEY}
 
 # Security
 HMAC_SECRET=change_me
@@ -349,7 +349,7 @@ def match_next_job(miner):
 **Client creates a job**
 ```bash
 curl -sX POST http://127.0.0.1:8011/v1/jobs \
-  -H 'X-Api-Key: REDACTED_CLIENT_KEY' \
+  -H 'X-Api-Key: ${CLIENT_API_KEY}' \
   -H 'Idempotency-Key: 7d4a...' \
   -H 'Content-Type: application/json' \
   -d '{
@@ -361,12 +361,12 @@ curl -sX POST http://127.0.0.1:8011/v1/jobs \
 **Miner registers + polls**
 ```bash
 curl -sX POST http://127.0.0.1:8011/v1/miners/register \
-  -H 'X-Api-Key: REDACTED_MINER_KEY' \
+  -H 'X-Api-Key: ${MINER_API_KEY}' \
   -H 'Content-Type: application/json' \
   -d '{"capabilities":{"gpu":"RTX4060Ti","cuda":"12.3","vram_gb":16},"concurrency":2,"region":"eu-central"}'
 
 curl -i -sX POST http://127.0.0.1:8011/v1/miners/poll \
-  -H 'X-Api-Key: REDACTED_MINER_KEY' \
+  -H 'X-Api-Key: ${MINER_API_KEY}' \
   -H 'Content-Type: application/json' \
   -d '{"max_wait_seconds":10}'
 ```
@@ -374,7 +374,7 @@ curl -i -sX POST http://127.0.0.1:8011/v1/miners/poll \
 **Miner submits result**
 ```bash
 curl -sX POST http://127.0.0.1:8011/v1/miners/<JOB_ID>/result \
-  -H 'X-Api-Key: REDACTED_MINER_KEY' \
+  -H 'X-Api-Key: ${MINER_API_KEY}' \
   -H 'Content-Type: application/json' \
   -d '{"result":{"sum":5},"metrics":{"latency_ms":42}}'
 ```
@@ -382,7 +382,7 @@ curl -sX POST http://127.0.0.1:8011/v1/miners/<JOB_ID>/result \
 **Client fetches result**
 ```bash
 curl -s http://127.0.0.1:8011/v1/jobs/<JOB_ID>/result \
-  -H 'X-Api-Key: REDACTED_CLIENT_KEY'
+  -H 'X-Api-Key: ${CLIENT_API_KEY}'
 ```
 
 ---
diff --git a/docs/reference/components/miner_node.md b/docs/reference/components/miner_node.md
index 7d3ea775..cd1e7df4 100644
--- a/docs/reference/components/miner_node.md
+++ b/docs/reference/components/miner_node.md
@@ -11,7 +11,7 @@
 - ✅ Deployed real GPU miner on host with NVIDIA RTX 4060 Ti (16GB)
 - ✅ Integrated Ollama for LLM inference across 13+ models
 - ✅ Configured systemd service (`aitbc-host-gpu-miner.service`)
-- ✅ Fixed miner ID configuration (REDACTED_MINER_KEY)
+- ✅ Fixed miner ID configuration (${MINER_API_KEY})
 - ✅ Enhanced logging with flush handlers for systemd journal visibility
 - ✅ Verified end-to-end workflow: job polling → Ollama inference → result submission → receipt generation
 
@@ -24,7 +24,7 @@
 
 ### Integration Points
 - Coordinator API: http://127.0.0.1:18000 (via Incus proxy)
-- Miner ID: REDACTED_MINER_KEY
+- Miner ID: ${MINER_API_KEY}
 - Heartbeat interval: 15 seconds
 - Job polling: 3-second intervals
 - Result submission: JSON with metrics and execution details
diff --git a/docs/reports/AITBC_PAYMENT_ARCHITECTURE.md b/docs/reports/AITBC_PAYMENT_ARCHITECTURE.md
index 4cbd019b..27d9ce9e 100644
--- a/docs/reports/AITBC_PAYMENT_ARCHITECTURE.md
+++ b/docs/reports/AITBC_PAYMENT_ARCHITECTURE.md
@@ -98,7 +98,7 @@ CREATE TABLE job_payments (
 ### 1. Client Creates Job
 ```bash
 curl -X POST http://localhost:18000/v1/jobs \
-  -H "X-Api-Key: REDACTED_CLIENT_KEY" \
+  -H "X-Api-Key: ${CLIENT_API_KEY}" \
   -H "Content-Type: application/json" \
   -d '{
     "payload": {
@@ -124,7 +124,7 @@ curl -X POST http://localhost:18000/v1/jobs \
 ### 3. Job Completion & Payment Release
 ```bash
 curl -X POST http://localhost:18000/v1/payments/pay456/release \
-  -H "X-Api-Key: REDACTED_CLIENT_KEY" \
+  -H "X-Api-Key: ${CLIENT_API_KEY}" \
   -d '{"job_id": "abc123", "reason": "Job completed"}'
 ```
 
diff --git a/docs/reports/INTEGRATION_TEST_FIXES.md b/docs/reports/INTEGRATION_TEST_FIXES.md
index 563ae284..8ab090de 100644
--- a/docs/reports/INTEGRATION_TEST_FIXES.md
+++ b/docs/reports/INTEGRATION_TEST_FIXES.md
@@ -22,7 +22,7 @@
 
 ### 4. Missing API Keys
 - **Problem**: Some requests were missing the required `X-Api-Key` header
-- **Solution**: Added `X-Api-Key: REDACTED_CLIENT_KEY` to all requests
+- **Solution**: Added `X-Api-Key: ${CLIENT_API_KEY}` to all requests
 
 ### 5. Non-existent Endpoints
 - **Problem**: Tests were calling endpoints that don't exist (e.g., `/v1/jobs/{id}/complete`)
diff --git a/docs/reports/TESTING_STATUS_REPORT.md b/docs/reports/TESTING_STATUS_REPORT.md
index d35e4af2..fbfe71a6 100644
--- a/docs/reports/TESTING_STATUS_REPORT.md
+++ b/docs/reports/TESTING_STATUS_REPORT.md
@@ -112,9 +112,9 @@ python -m pytest -m integration
 
 ### Authentication Issues?
 - Use correct API keys:
-  - Client: `REDACTED_CLIENT_KEY`
-  - Miner: `REDACTED_MINER_KEY`
-  - Admin: `REDACTED_ADMIN_KEY`
+  - Client: `${CLIENT_API_KEY}`
+  - Miner: `${MINER_API_KEY}`
+  - Admin: `${ADMIN_API_KEY}`
 
 ## 📝 Next Steps
 
diff --git a/docs/roadmap.md b/docs/roadmap.md
index b31ca5c3..fe8c06e8 100644
--- a/docs/roadmap.md
+++ b/docs/roadmap.md
@@ -390,7 +390,7 @@ This roadmap aggregates high-priority tasks derived from the bootstrap specifica
   - ✅ Validate receipt payload structure and signature generation
 
 - **Miner Configuration & Optimization**
-  - ✅ Fix miner ID mismatch (host-gpu-miner → REDACTED_MINER_KEY)
+  - ✅ Fix miner ID mismatch (host-gpu-miner → ${MINER_API_KEY})
   - ✅ Enhance logging with explicit flush handlers for systemd journal
   - ✅ Configure unbuffered Python logging environment variables
   - ✅ Create systemd service unit with proper environment configuration
diff --git a/examples/example_client_remote.py b/examples/example_client_remote.py
index 9a3cc159..a68934c2 100644
--- a/examples/example_client_remote.py
+++ b/examples/example_client_remote.py
@@ -9,7 +9,7 @@ from datetime import datetime
 
 # Configuration - using the SSH tunnel to remote server
 COORDINATOR_URL = "http://localhost:8001"
-CLIENT_API_KEY = "REDACTED_CLIENT_KEY"
+CLIENT_API_KEY = "${CLIENT_API_KEY}"
 
 def create_job():
     """Create a job on the remote coordinator"""
diff --git a/home/enhanced_client.py b/home/enhanced_client.py
index 32f77862..d0797874 100755
--- a/home/enhanced_client.py
+++ b/home/enhanced_client.py
@@ -15,7 +15,7 @@ sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'cli'))
 class AITBCClient:
     def __init__(self):
         self.coordinator_url = "http://localhost:8001"
-        self.api_key = "REDACTED_CLIENT_KEY"
+        self.api_key = "${CLIENT_API_KEY}"
     
     def submit_job(self, prompt, model="llama3.2:latest", wait_for_result=True):
         """Submit a job and optionally wait for result"""
diff --git a/home/test_ollama_blockchain.py b/home/test_ollama_blockchain.py
index 0ad59702..9424400a 100755
--- a/home/test_ollama_blockchain.py
+++ b/home/test_ollama_blockchain.py
@@ -107,7 +107,7 @@ def get_job_result(job_id: str) -> Optional[dict]:
     with httpx.Client() as client:
         response = client.get(
             f"{DEFAULT_COORDINATOR}/v1/jobs/{job_id}/result",
-            headers={"X-Api-Key": "REDACTED_CLIENT_KEY"},
+            headers={"X-Api-Key": "${CLIENT_API_KEY}"},
             timeout=10,
         )
         if response.status_code == 200:
diff --git a/plugins/ollama/README.md b/plugins/ollama/README.md
index efe51af4..4d03da85 100644
--- a/plugins/ollama/README.md
+++ b/plugins/ollama/README.md
@@ -70,7 +70,7 @@ Miners earn 150% of the cost (50% markup).
 ```python
 from client_plugin import OllamaClient
 
-client = OllamaClient("http://localhost:8001", "REDACTED_CLIENT_KEY")
+client = OllamaClient("http://localhost:8001", "${CLIENT_API_KEY}")
 
 job_id = client.submit_generation(
     model="llama3.2:latest",
diff --git a/plugins/ollama/client_plugin.py b/plugins/ollama/client_plugin.py
index 8bfa7718..551fabf0 100755
--- a/plugins/ollama/client_plugin.py
+++ b/plugins/ollama/client_plugin.py
@@ -190,7 +190,7 @@ def main():
     
     parser = argparse.ArgumentParser(description="AITBC Ollama Client")
     parser.add_argument("--url", default="http://localhost:8001", help="Coordinator URL")
-    parser.add_argument("--api-key", default="REDACTED_CLIENT_KEY", help="API key")
+    parser.add_argument("--api-key", default="${CLIENT_API_KEY}", help="API key")
     
     subparsers = parser.add_subparsers(dest="command", help="Commands")
     
diff --git a/plugins/ollama/demo.py b/plugins/ollama/demo.py
index a3d4dbe6..94300929 100755
--- a/plugins/ollama/demo.py
+++ b/plugins/ollama/demo.py
@@ -30,7 +30,7 @@ def main():
     print(f"✅ Ollama running with {len(models)} models")
     
     # Create client
-    client = OllamaClient("http://localhost:8001", "REDACTED_CLIENT_KEY")
+    client = OllamaClient("http://localhost:8001", "${CLIENT_API_KEY}")
     
     # Submit a few different jobs
     jobs = []
diff --git a/plugins/ollama/miner_plugin.py b/plugins/ollama/miner_plugin.py
index 45423084..fc4b5d64 100755
--- a/plugins/ollama/miner_plugin.py
+++ b/plugins/ollama/miner_plugin.py
@@ -264,7 +264,7 @@ if __name__ == "__main__":
     import sys
     
     coordinator_url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8001"
-    api_key = sys.argv[2] if len(sys.argv) > 2 else "REDACTED_MINER_KEY"
+    api_key = sys.argv[2] if len(sys.argv) > 2 else "${MINER_API_KEY}"
     miner_id = sys.argv[3] if len(sys.argv) > 3 else "ollama-miner"
     
     # Create and run miner
diff --git a/plugins/ollama/test_ollama_plugin.py b/plugins/ollama/test_ollama_plugin.py
index 2d3aab39..8d5e4f8b 100755
--- a/plugins/ollama/test_ollama_plugin.py
+++ b/plugins/ollama/test_ollama_plugin.py
@@ -68,7 +68,7 @@ def test_client_miner_flow():
     print("\n🔄 Testing Client-Miner Flow...")
     
     # Create client
-    client = OllamaClient("http://localhost:8001", "REDACTED_CLIENT_KEY")
+    client = OllamaClient("http://localhost:8001", "${CLIENT_API_KEY}")
     
     # Submit a job
     print("1. Submitting inference job...")
@@ -89,7 +89,7 @@ def test_client_miner_flow():
     miner_cmd = [
         "python3", "miner_plugin.py",
         "http://localhost:8001",
-        "REDACTED_MINER_KEY",
+        "${MINER_API_KEY}",
         "ollama-miner-test"
     ]
     
diff --git a/scripts/aitbc-cli.sh b/scripts/aitbc-cli.sh
index efaf8565..15b22e79 100755
--- a/scripts/aitbc-cli.sh
+++ b/scripts/aitbc-cli.sh
@@ -5,9 +5,9 @@ ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 CLI_PY="$ROOT_DIR/cli/client.py"
 
 AITBC_URL="${AITBC_URL:-http://127.0.0.1:18000}"
-CLIENT_KEY="${CLIENT_KEY:-REDACTED_CLIENT_KEY}"
-ADMIN_KEY="${ADMIN_KEY:-REDACTED_ADMIN_KEY}"
-MINER_KEY="${MINER_KEY:-REDACTED_MINER_KEY}"
+CLIENT_KEY="${CLIENT_KEY:?Set CLIENT_KEY env var}"
+ADMIN_KEY="${ADMIN_KEY:?Set ADMIN_KEY env var}"
+MINER_KEY="${MINER_KEY:?Set MINER_KEY env var}"
 
 usage() {
   cat <<'EOF'
@@ -28,9 +28,9 @@ Usage:
 
 Environment overrides:
   AITBC_URL   (default: http://127.0.0.1:18000)
-  CLIENT_KEY  (default: REDACTED_CLIENT_KEY)
-  ADMIN_KEY   (default: REDACTED_ADMIN_KEY)
-  MINER_KEY   (default: REDACTED_MINER_KEY)
+  CLIENT_KEY  (required)
+  ADMIN_KEY   (required)
+  MINER_KEY   (required)
 EOF
 }
 
diff --git a/scripts/assign_proposer.py b/scripts/assign_proposer.py
index 9181d77e..cb135962 100644
--- a/scripts/assign_proposer.py
+++ b/scripts/assign_proposer.py
@@ -8,7 +8,7 @@ import json
 
 # Configuration
 COORDINATOR_URL = "http://localhost:8001"
-MINER_API_KEY = "REDACTED_MINER_KEY"
+MINER_API_KEY = "${MINER_API_KEY}"
 MINER_ID = "localhost-gpu-miner"
 
 def assign_proposer_to_latest_block():
diff --git a/scripts/deploy/deploy-to-server.sh b/scripts/deploy/deploy-to-server.sh
index d07b60b7..8b5573b4 100755
--- a/scripts/deploy/deploy-to-server.sh
+++ b/scripts/deploy/deploy-to-server.sh
@@ -217,7 +217,7 @@ ssh $SERVER "systemctl status aitbc-blockchain --no-pager -l | head -10"
 print_status "Testing endpoints..."
 ssh $SERVER "curl -s http://127.0.0.1:8000/v1/health | head -c 100"
 echo ""
-ssh $SERVER "curl -s http://127.0.0.1:8000/v1/admin/stats -H 'X-Api-Key: REDACTED_ADMIN_KEY' | head -c 100"
+ssh $SERVER "curl -s http://127.0.0.1:8000/v1/admin/stats -H 'X-Api-Key: ${ADMIN_API_KEY}' | head -c 100"
 echo ""
 
 echo ""
diff --git a/scripts/gpu/gpu_miner_host.py b/scripts/gpu/gpu_miner_host.py
index 05d6c7e0..0664d1a2 100644
--- a/scripts/gpu/gpu_miner_host.py
+++ b/scripts/gpu/gpu_miner_host.py
@@ -14,8 +14,8 @@ from datetime import datetime
 
 # Configuration
 COORDINATOR_URL = "http://127.0.0.1:18000"
-MINER_ID = "REDACTED_MINER_KEY"
-AUTH_TOKEN = "REDACTED_MINER_KEY"
+MINER_ID = "${MINER_API_KEY}"
+AUTH_TOKEN = "${MINER_API_KEY}"
 HEARTBEAT_INTERVAL = 15
 MAX_RETRIES = 10
 RETRY_DELAY = 30
diff --git a/scripts/local-domain-proxy.py b/scripts/local-domain-proxy.py
index 41275aba..6a5594a3 100755
--- a/scripts/local-domain-proxy.py
+++ b/scripts/local-domain-proxy.py
@@ -124,7 +124,7 @@ def test_endpoints():
     for name, url in endpoints:
         try:
             if "admin" in url:
-                response = requests.get(url, headers={"X-Api-Key": "REDACTED_ADMIN_KEY"}, timeout=2)
+                response = requests.get(url, headers={"X-Api-Key": "${ADMIN_API_KEY}"}, timeout=2)
             else:
                 response = requests.get(url, timeout=2)
             print(f"   {name}: ✅ {response.status_code}")
diff --git a/scripts/miner_workflow.py b/scripts/miner_workflow.py
index 9fc87db3..45376f20 100644
--- a/scripts/miner_workflow.py
+++ b/scripts/miner_workflow.py
@@ -10,7 +10,7 @@ from datetime import datetime
 
 # Configuration
 COORDINATOR_URL = "http://localhost:8001"
-MINER_API_KEY = "REDACTED_MINER_KEY"
+MINER_API_KEY = "${MINER_API_KEY}"
 MINER_ID = "localhost-gpu-miner"
 
 def poll_and_accept_job():
diff --git a/scripts/service/fix-services.sh b/scripts/service/fix-services.sh
index 8d7e1aec..397d69eb 100755
--- a/scripts/service/fix-services.sh
+++ b/scripts/service/fix-services.sh
@@ -52,7 +52,7 @@ echo "API Health:"
 curl -s http://127.0.0.1:8000/v1/health | head -c 100
 
 echo -e "\n\nAdmin Stats:"
-curl -s http://127.0.0.1:8000/v1/admin/stats -H "X-Api-Key: REDACTED_ADMIN_KEY" | head -c 100
+curl -s http://127.0.0.1:8000/v1/admin/stats -H "X-Api-Key: ${ADMIN_API_KEY}" | head -c 100
 
 echo -e "\n\nMarketplace Offers:"
 curl -s http://127.0.0.1:8000/v1/marketplace/offers | head -c 100
diff --git a/scripts/service/run-local-services.sh b/scripts/service/run-local-services.sh
index 4624912e..48b6ad82 100755
--- a/scripts/service/run-local-services.sh
+++ b/scripts/service/run-local-services.sh
@@ -77,7 +77,7 @@ else
 fi
 
 echo -n "Admin API: "
-if curl -s http://127.0.0.1:8000/v1/admin/stats -H "X-Api-Key: REDACTED_ADMIN_KEY" > /dev/null; then
+if curl -s http://127.0.0.1:8000/v1/admin/stats -H "X-Api-Key: ${ADMIN_API_KEY}" > /dev/null; then
     echo "✅ OK"
 else
     echo "❌ Failed"
diff --git a/scripts/test/verify_transactions_fixed.py b/scripts/test/verify_transactions_fixed.py
index e67d61af..8c0aeee4 100755
--- a/scripts/test/verify_transactions_fixed.py
+++ b/scripts/test/verify_transactions_fixed.py
@@ -56,7 +56,7 @@ def main():
     print("   • Professional, production-ready interface")
     
     print("\n💡 Note: Most transactions show:")
-    print("   • From: REDACTED_CLIENT_KEY")
+    print("   • From: ${CLIENT_API_KEY}")
     print("   • To: null (not assigned to miner yet)")
     print("   • Value: 0 (cost shown when completed)")
     print("   • Status: Queued/Running/Expired")
diff --git a/scripts/testing/register_test_clients.py b/scripts/testing/register_test_clients.py
index 42ddfbf9..228114fa 100644
--- a/scripts/testing/register_test_clients.py
+++ b/scripts/testing/register_test_clients.py
@@ -8,7 +8,7 @@ import json
 # Configuration
 COORDINATOR_URL = "http://127.0.0.1:8000/v1"
 CLIENT_KEY = "test_client_key_123"
-MINER_KEY = "REDACTED_MINER_KEY"
+MINER_KEY = "${MINER_API_KEY}"
 
 async def register_client():
     """Register a test client"""
diff --git a/scripts/testing/test_payment_integration.py b/scripts/testing/test_payment_integration.py
index 9c4f0aa9..e0d60f02 100755
--- a/scripts/testing/test_payment_integration.py
+++ b/scripts/testing/test_payment_integration.py
@@ -18,7 +18,7 @@ logger = logging.getLogger(__name__)
 # Configuration
 COORDINATOR_URL = "https://aitbc.bubuit.net/api"
 CLIENT_KEY = "test_client_key_123"
-MINER_KEY = "REDACTED_MINER_KEY"
+MINER_KEY = "${MINER_API_KEY}"
 
 class PaymentIntegrationTest:
     def __init__(self):
diff --git a/scripts/testing/test_payment_local.py b/scripts/testing/test_payment_local.py
index 4a613840..a485acda 100644
--- a/scripts/testing/test_payment_local.py
+++ b/scripts/testing/test_payment_local.py
@@ -17,8 +17,8 @@ logger = logging.getLogger(__name__)
 
 # Configuration - Using localhost as we're testing from the server
 COORDINATOR_URL = "http://127.0.0.1:8000/v1"
-CLIENT_KEY = "REDACTED_CLIENT_KEY"
-MINER_KEY = "REDACTED_MINER_KEY"
+CLIENT_KEY = "${CLIENT_API_KEY}"
+MINER_KEY = "${MINER_API_KEY}"
 
 class PaymentIntegrationTest:
     def __init__(self):
diff --git a/tests/integration/test_full_workflow.py b/tests/integration/test_full_workflow.py
index cd89ba3c..0015f665 100644
--- a/tests/integration/test_full_workflow.py
+++ b/tests/integration/test_full_workflow.py
@@ -35,7 +35,7 @@ class TestJobToBlockchainWorkflow:
             "/v1/jobs",
             json=job_data,
             headers={
-                "X-Api-Key": "REDACTED_CLIENT_KEY",  # Valid API key from config
+                "X-Api-Key": "${CLIENT_API_KEY}",  # Valid API key from config
                 "X-Tenant-ID": "test-tenant"
             }
         )
@@ -46,7 +46,7 @@ class TestJobToBlockchainWorkflow:
         # 2. Get job status
         response = coordinator_client.get(
             f"/v1/jobs/{job_id}",
-            headers={"X-Api-Key": "REDACTED_CLIENT_KEY"}
+            headers={"X-Api-Key": "${CLIENT_API_KEY}"}
         )
         assert response.status_code == 200
         assert response.json()["job_id"] == job_id  # Fixed: use job_id
@@ -54,7 +54,7 @@ class TestJobToBlockchainWorkflow:
         # 3. Test that we can get receipts (even if empty)
         response = coordinator_client.get(
             f"/v1/jobs/{job_id}/receipts",
-            headers={"X-Api-Key": "REDACTED_CLIENT_KEY"}
+            headers={"X-Api-Key": "${CLIENT_API_KEY}"}
         )
         assert response.status_code == 200
         receipts = response.json()
@@ -74,7 +74,7 @@ class TestJobToBlockchainWorkflow:
             response = coordinator_client.post(
                 "/v1/jobs",
                 json={"payload": {"job_type": "test", "parameters": {}}, "ttl_seconds": 900},
-                headers={"X-Api-Key": "REDACTED_CLIENT_KEY", "X-Tenant-ID": "tenant-a"}
+                headers={"X-Api-Key": "${CLIENT_API_KEY}", "X-Tenant-ID": "tenant-a"}
             )
             tenant_a_jobs.append(response.json()["job_id"])  # Fixed: use job_id
         
@@ -83,7 +83,7 @@ class TestJobToBlockchainWorkflow:
             response = coordinator_client.post(
                 "/v1/jobs",
                 json={"payload": {"job_type": "test", "parameters": {}}, "ttl_seconds": 900},
-                headers={"X-Api-Key": "REDACTED_CLIENT_KEY", "X-Tenant-ID": "tenant-b"}
+                headers={"X-Api-Key": "${CLIENT_API_KEY}", "X-Tenant-ID": "tenant-b"}
             )
             tenant_b_jobs.append(response.json()["job_id"])  # Fixed: use job_id
         
@@ -91,7 +91,7 @@ class TestJobToBlockchainWorkflow:
         # Try to access other tenant's job (currently returns 200, not 404)
         response = coordinator_client.get(
             f"/v1/jobs/{tenant_b_jobs[0]}",
-            headers={"X-Api-Key": "REDACTED_CLIENT_KEY", "X-Tenant-ID": "tenant-a"}
+            headers={"X-Api-Key": "${CLIENT_API_KEY}", "X-Tenant-ID": "tenant-a"}
         )
         # The API doesn't enforce tenant isolation yet
         assert response.status_code in [200, 404]  # Accept either for now
@@ -122,7 +122,7 @@ class TestWalletToCoordinatorIntegration:
             "/v1/jobs",
             json=job_data,
             headers={
-                "X-Api-Key": "REDACTED_CLIENT_KEY",
+                "X-Api-Key": "${CLIENT_API_KEY}",
                 "X-Tenant-ID": "test-tenant"
             }
         )
@@ -137,7 +137,7 @@ class TestWalletToCoordinatorIntegration:
         # Get payment details
         response = coordinator_client.get(
             f"/v1/jobs/{job_id}/payment",
-            headers={"X-Api-Key": "REDACTED_CLIENT_KEY"}
+            headers={"X-Api-Key": "${CLIENT_API_KEY}"}
         )
         assert response.status_code == 200
         payment = response.json()
@@ -155,7 +155,7 @@ class TestWalletToCoordinatorIntegration:
                     "job_id": job_id,
                     "reason": "Job completed successfully"
                 },
-                headers={"X-Api-Key": "REDACTED_CLIENT_KEY"}
+                headers={"X-Api-Key": "${CLIENT_API_KEY}"}
             )
             # Note: This might fail if wallet daemon is not running
             # That's OK for this test
@@ -253,7 +253,7 @@ class TestMarketplaceIntegration:
         response = coordinator_client.post(
             "/v1/jobs",
             json=job_data,
-            headers={"X-Api-Key": "REDACTED_CLIENT_KEY"}
+            headers={"X-Api-Key": "${CLIENT_API_KEY}"}
         )
         assert response.status_code == 201
         job = response.json()
@@ -285,7 +285,7 @@ class TestSecurityIntegration:
             "/v1/jobs",
             json=job_data,
             headers={
-                "X-Api-Key": "REDACTED_CLIENT_KEY",
+                "X-Api-Key": "${CLIENT_API_KEY}",
                 "X-Tenant-ID": "secure-tenant"
             }
         )
@@ -300,7 +300,7 @@ class TestSecurityIntegration:
         # Test that we can retrieve the job securely
         response = coordinator_client.get(
             f"/v1/jobs/{job_id}",
-            headers={"X-Api-Key": "REDACTED_CLIENT_KEY"}
+            headers={"X-Api-Key": "${CLIENT_API_KEY}"}
         )
         assert response.status_code == 200
         retrieved_job = response.json()
diff --git a/tests/test_working_integration.py b/tests/test_working_integration.py
index 7d52e15a..191cdd03 100644
--- a/tests/test_working_integration.py
+++ b/tests/test_working_integration.py
@@ -58,7 +58,7 @@ def test_job_endpoint_structure():
         response = client.post(
             "/v1/jobs",
             json={},
-            headers={"X-Api-Key": "REDACTED_CLIENT_KEY"}
+            headers={"X-Api-Key": "${CLIENT_API_KEY}"}
         )
         # Should get validation error, not auth or not found
         assert response.status_code in [400, 422], f"Expected validation error, got {response.status_code}"
@@ -84,7 +84,7 @@ def test_miner_endpoint_structure():
         response = client.post(
             "/v1/miners/register",
             json={},
-            headers={"X-Api-Key": "REDACTED_MINER_KEY"}
+            headers={"X-Api-Key": "${MINER_API_KEY}"}
         )
         # Should get validation error, not auth or not found
         assert response.status_code in [400, 422], f"Expected validation error, got {response.status_code}"
diff --git a/website/dashboards/admin-dashboard.html b/website/dashboards/admin-dashboard.html
index bff44109..cce40d66 100644
--- a/website/dashboards/admin-dashboard.html
+++ b/website/dashboards/admin-dashboard.html
@@ -174,7 +174,7 @@
 
     <script>
         const API_BASE = '/api';
-        const ADMIN_API_KEY = 'REDACTED_ADMIN_KEY';
+        const ADMIN_API_KEY = '${ADMIN_API_KEY}';
         const headers = { 'X-Api-Key': ADMIN_API_KEY };
 
         // Initialize
diff --git a/website/docs/flowchart.html b/website/docs/flowchart.html
index bae1cae2..b1cd2b47 100644
--- a/website/docs/flowchart.html
+++ b/website/docs/flowchart.html
@@ -357,7 +357,7 @@
                     <li>Sets environment variables:
                         <ul>
                             <li><span class="inline-code">AITBC_URL=http://127.0.0.1:18000</span></li>
-                            <li><span class="inline-code">CLIENT_KEY=REDACTED_CLIENT_KEY</span></li>
+                            <li><span class="inline-code">CLIENT_KEY=${CLIENT_API_KEY}</span></li>
                         </ul>
                     </li>
                     <li>Calls Python client: <span class="inline-code">python3 cli/client.py --url $AITBC_URL --api-key $CLIENT_KEY submit inference --prompt "..."</span></li>
@@ -374,7 +374,7 @@
   "type": "inference",
   "prompt": "What is machine learning?",
   "model": "llama3.2:latest",
-  "client_key": "REDACTED_CLIENT_KEY",
+  "client_key": "${CLIENT_API_KEY}",
   "timestamp": "2025-01-29T14:50:00Z"
 }</code></pre>
                     </li>
@@ -386,7 +386,7 @@
                     <pre><code>POST /v1/jobs
 Host: 127.0.0.1:18000
 Content-Type: application/json
-X-Api-Key: REDACTED_CLIENT_KEY
+X-Api-Key: ${CLIENT_API_KEY}
 
 {
   "type": "inference",
@@ -418,7 +418,7 @@ X-Api-Key: REDACTED_CLIENT_KEY
                         <pre><code>{
   "type": "submit_job",
   "job_id": "job_123456",
-  "client": "REDACTED_CLIENT_KEY",
+  "client": "${CLIENT_API_KEY}",
   "payload_hash": "abc123...",
   "reward": "100aitbc"
 }</code></pre>
@@ -445,7 +445,7 @@ X-Api-Key: REDACTED_CLIENT_KEY
                             <li>Select based on stake, reputation, capacity</li>
                         </ul>
                     </li>
-                    <li>Selected miner: <span class="inline-code">REDACTED_MINER_KEY</span></li>
+                    <li>Selected miner: <span class="inline-code">${MINER_API_KEY}</span></li>
                 </ol>
 
                 <div class="http-request">
@@ -453,7 +453,7 @@ X-Api-Key: REDACTED_CLIENT_KEY
                     <pre><code>POST /v1/jobs/assign
 Host: 127.0.0.1:18001
 Content-Type: application/json
-X-Api-Key: REDACTED_ADMIN_KEY
+X-Api-Key: ${ADMIN_API_KEY}
 
 {
   "job_id": "job_123456",
@@ -518,7 +518,7 @@ Content-Type: application/json
                     <pre><code>POST /v1/jobs/job_123456/complete
 Host: 127.0.0.1:18000
 Content-Type: application/json
-X-Miner-Key: REDACTED_MINER_KEY
+X-Miner-Key: ${MINER_API_KEY}
 
 {
   "job_id": "job_123456",
@@ -544,8 +544,8 @@ X-Miner-Key: REDACTED_MINER_KEY
                         <pre><code>{
   "receipt_id": "receipt_789",
   "job_id": "job_123456",
-  "client": "REDACTED_CLIENT_KEY",
-  "miner": "REDACTED_MINER_KEY",
+  "client": "${CLIENT_API_KEY}",
+  "miner": "${MINER_API_KEY}",
   "amount_paid": "0.25aitbc",
   "result_hash": "hash_of_result",
   "block_height": 12345,
@@ -573,7 +573,7 @@ X-Miner-Key: REDACTED_MINER_KEY
                     <h4>HTTP Request:</h4>
                     <pre><code>GET /v1/jobs/job_123456
 Host: 127.0.0.1:18000
-X-Api-Key: REDACTED_CLIENT_KEY</code></pre>
+X-Api-Key: ${CLIENT_API_KEY}</code></pre>
 
                     <h4>Response:</h4>
                     <pre><code>{