diff --git a/packages/cid-verifier/README.md b/packages/cid-verifier/README.md
index 6fb8ea8..98ddf55 100644
--- a/packages/cid-verifier/README.md
+++ b/packages/cid-verifier/README.md
@@ -17,6 +17,7 @@
     wrangler secret put LOKI_TOKEN --env $(whoami) # Get from Loki
     wrangler secret put GOOGLE_CLOUD_API_URL --env $(whoami) # Get from 1password
     wrangler secret put GOOGLE_CLOUD_API_KEY --env $(whoami) # Get from 1password
+    wrangler secret put BASIC_AUTH_TOKENS --env $(whoami) # JSON String with array of allowable auth tokens (eg. echo -e '["Zm9vOmZvbw==","em9vOnpvbw=="]' | wrangler secret ...)
   ```
 
 - `pnpm run publish` - Publish the worker under desired env. An alias for `wrangler publish --env $(whoami)`
diff --git a/packages/cid-verifier/src/auth.js b/packages/cid-verifier/src/auth.js
new file mode 100644
index 0000000..03f76ff
--- /dev/null
+++ b/packages/cid-verifier/src/auth.js
@@ -0,0 +1,48 @@
+import { NoTokenError, ExpectedBasicStringError, NoValidTokenError } from './errors.js'
+
+/**
+ * Middleware: verify the request is authenticated using Basic Authentication.
+ *
+ * @param {import('itty-router').RouteHandler<Request>} handler
+ */
+export function withAuthToken (handler) {
+  /**
+   * @param {Request} request
+   * @param {import('./env').Env} env
+   * @returns {Promise<Response>}
+   */
+  return async (request, env) => {
+    const token = getTokenFromRequest(request)
+    if (env.BASIC_AUTH_TOKENS.indexOf(token) === -1) {
+      throw new NoValidTokenError()
+    }
+    return await handler(request, env)
+  }
+}
+
+/**
+ * @param {Request} request
+ */
+function getTokenFromRequest (request) {
+  const authHeader = request.headers.get('Authorization') || ''
+  if (!authHeader) {
+    throw new NoTokenError()
+  }
+
+  const token = parseAuthorizationHeader(authHeader)
+  if (!token) {
+    throw new NoTokenError()
+  }
+  return token
+}
+
+/**
+ * @param {string} header
+ */
+function parseAuthorizationHeader (header) {
+  if (!header.toLowerCase().startsWith('basic ')) {
+    throw new ExpectedBasicStringError()
+  }
+
+  return header.substring(6)
+}
diff --git a/packages/cid-verifier/src/bindings.d.ts b/packages/cid-verifier/src/bindings.d.ts
index 83145a8..0785e54 100644
--- a/packages/cid-verifier/src/bindings.d.ts
+++ b/packages/cid-verifier/src/bindings.d.ts
@@ -4,6 +4,7 @@ import { Logging } from "@web3-storage/worker-utils/loki";
 export {};
 
 export interface EnvInput {
+  BASIC_AUTH_TOKENS: Array<string>;
   ENV: string;
   DEBUG: string;
   GOOGLE_EVALUATE_SAFE_CONFIDENCE_LEVELS: Array<string>;
diff --git a/packages/cid-verifier/src/errors.js b/packages/cid-verifier/src/errors.js
index 06d0bcf..dce3ba1 100644
--- a/packages/cid-verifier/src/errors.js
+++ b/packages/cid-verifier/src/errors.js
@@ -1,3 +1,42 @@
+export class NoTokenError extends Error {
+  /**
+   * @param {string} message
+   */
+  constructor (message = 'No token found in `Authorization: Basic ` header') {
+    super(message)
+    this.name = 'NoToken'
+    this.code = NoTokenError.CODE
+    this.status = 401
+  }
+}
+NoTokenError.CODE = 'ERROR_NO_TOKEN'
+
+export class ExpectedBasicStringError extends Error {
+  /**
+   * @param {string} message
+   */
+  constructor (message = 'Expected argument to be a string in the `Basic {token}` format') {
+    super(message)
+    this.name = 'ExpectedBasicString'
+    this.code = ExpectedBasicStringError.CODE
+    this.status = 401
+  }
+}
+ExpectedBasicStringError.CODE = 'ERROR_NO_TOKEN'
+
+export class NoValidTokenError extends Error {
+  /**
+   * @param {string} message
+   */
+  constructor (message = 'Provided token is not valid') {
+    super(message)
+    this.name = 'NoValidToken'
+    this.code = NoValidTokenError.CODE
+    this.status = 401
+  }
+}
+NoValidTokenError.CODE = 'ERROR_NO_VALID_TOKEN'
+
 export class ServiceUnavailableError extends Error {
   /**
    * @param {string} message
diff --git a/packages/cid-verifier/src/index.js b/packages/cid-verifier/src/index.js
index ab587c9..1e2a391 100644
--- a/packages/cid-verifier/src/index.js
+++ b/packages/cid-verifier/src/index.js
@@ -5,6 +5,7 @@ import { Router } from 'itty-router'
 import { verificationGet, verificationPost } from './verification.js'
 import { versionGet } from './version.js'
 
+import { withAuthToken } from './auth.js'
 import { addCorsHeaders, withCorsHeaders } from './cors.js'
 import { errorHandler } from './error-handler.js'
 import { envAll } from './env.js'
@@ -17,8 +18,8 @@ const router = Router()
 router
   .all('*', envAll)
   .get('/version', withCorsHeaders(versionGet))
-  .get('/denylist', withCorsHeaders(verificationGet))
-  .post('/', withCorsHeaders(verificationPost))
+  .get('/denylist', withCorsHeaders(withAuthToken(verificationGet)))
+  .post('/', withCorsHeaders(withAuthToken(verificationPost)))
 
 /**
  * @param {Error} error
diff --git a/packages/cid-verifier/test/auth.spec.js b/packages/cid-verifier/test/auth.spec.js
new file mode 100644
index 0000000..34e4094
--- /dev/null
+++ b/packages/cid-verifier/test/auth.spec.js
@@ -0,0 +1,26 @@
+import { test, getMiniflare } from './utils/setup.js'
+
+test.before(async (t) => {
+  const mf = getMiniflare()
+  t.context = {
+    mf
+  }
+})
+
+test('GET /denylist fails with no Authorization header', async (t) => {
+  const { mf } = t.context
+  const response = await mf.dispatchFetch('http://localhost:8787/denylist?cid=never')
+  t.is(response.status, 401)
+})
+
+test('GET /denylist fails with invalid Authorization header', async (t) => {
+  const { mf } = t.context
+  const response = await mf.dispatchFetch('http://localhost:8787/denylist?cid=never', { headers: { Authorization: '' } })
+  t.is(response.status, 401)
+})
+
+test('GET /denylist fails with unknown Authorization credentials', async (t) => {
+  const { mf } = t.context
+  const response = await mf.dispatchFetch('http://localhost:8787/denylist?cid=never', { headers: { Authorization: 'basic asdfasdf' } })
+  t.is(response.status, 401)
+})
diff --git a/packages/cid-verifier/test/utils/miniflare.js b/packages/cid-verifier/test/utils/miniflare.js
index 15ff5fb..76842b9 100644
--- a/packages/cid-verifier/test/utils/miniflare.js
+++ b/packages/cid-verifier/test/utils/miniflare.js
@@ -20,6 +20,14 @@ export function getMiniflare () {
     // This will override the option in wrangler.toml.
     buildCommand: undefined,
     wranglerConfigEnv: 'test',
-    modules: true
+    modules: true,
+    bindings: {
+      BASIC_AUTH_TOKENS: [
+        // echo -n 'foo:foo' | base64
+        'Zm9vOmZvbw==',
+        // echo -n 'zoo:zoo' | base64
+        'em9vOnpvbw=='
+      ]
+    }
   })
 }
diff --git a/packages/cid-verifier/test/verification.spec.js b/packages/cid-verifier/test/verification.spec.js
index b6d07ea..050393d 100644
--- a/packages/cid-verifier/test/verification.spec.js
+++ b/packages/cid-verifier/test/verification.spec.js
@@ -18,6 +18,9 @@ const malwareCid = await createTestCid('malware')
 const maliciousCid = await createTestCid('malicious')
 const safeCid = await createTestCid('safe')
 const errorCid = await createTestCid('error')
+const headers = {
+  Authorization: 'basic Zm9vOmZvbw=='
+}
 
 // Create a new Miniflare environment for each test
 test.before(async (t) => {
@@ -50,98 +53,98 @@ test.before(async (t) => {
 
 test('GET /denylist handles cids in DENYLIST', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch(`http://localhost:8787/denylist?cid=${cidInDenyList}`)
+  const response = await mf.dispatchFetch(`http://localhost:8787/denylist?cid=${cidInDenyList}`, { headers })
   t.is(await response.text(), 'MALWARE DETECTED')
   t.is(response.status, 403)
 })
 
 test('GET /denylist handles cids in DENYLIST blocked for legal reasons', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch(`http://localhost:8787/denylist?cid=${cidInDenyListBlockedForLeganReasons}`)
+  const response = await mf.dispatchFetch(`http://localhost:8787/denylist?cid=${cidInDenyListBlockedForLeganReasons}`, { headers })
   t.is(await response.text(), 'BLOCKED FOR LEGAL REASONS')
   t.is(response.status, 451)
 })
 
 test('GET /denylist handles no cid', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch('http://localhost:8787/denylist?')
+  const response = await mf.dispatchFetch('http://localhost:8787/denylist?', { headers })
   t.is(await response.text(), 'cid is a required query param')
   t.is(response.status, 400)
 })
 
 test('GET /denylist handles invalid cid', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch('http://localhost:8787/denylist?cid=invalid')
+  const response = await mf.dispatchFetch('http://localhost:8787/denylist?cid=invalid', { headers })
   t.is(await response.text(), 'cid query param is invalid')
   t.is(response.status, 400)
 })
 
 test('GET /denylist handles no results', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch(`http://localhost:8787/denylist?cid=${emptyCid}`)
+  const response = await mf.dispatchFetch(`http://localhost:8787/denylist?cid=${emptyCid}`, { headers })
   t.is(await response.text(), '')
   t.is(response.status, 204)
 })
 
 test('GET /denylist handles pending results', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch(`http://localhost:8787/denylist?cid=${pendingCid}`)
+  const response = await mf.dispatchFetch(`http://localhost:8787/denylist?cid=${pendingCid}`, { headers })
   t.is(await response.text(), '')
   t.is(response.status, 204)
 })
 
 test('GET /denylist handles successful results', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch(`http://localhost:8787/denylist?cid=${notMalwareCid}`)
+  const response = await mf.dispatchFetch(`http://localhost:8787/denylist?cid=${notMalwareCid}`, { headers })
   t.is(await response.text(), '')
   t.is(response.status, 204)
 })
 
 test('POST / handles no cid', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch('http://localhost:8787/?', { method: 'POST' })
+  const response = await mf.dispatchFetch('http://localhost:8787/?', { method: 'POST', headers })
   t.is(await response.text(), 'cid is a required query param')
   t.is(response.status, 400)
 })
 
 test('POST / handles invalid cid', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch('http://localhost:8787/?cid=invalid', { method: 'POST' })
+  const response = await mf.dispatchFetch('http://localhost:8787/?cid=invalid', { method: 'POST', headers })
   t.is(await response.text(), 'cid query param is invalid')
   t.is(response.status, 400)
 })
 
 test('POST / handles malicious urls', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch(`http://localhost:8787/?cid=${maliciousCid}`, { method: 'POST' })
+  const response = await mf.dispatchFetch(`http://localhost:8787/?cid=${maliciousCid}`, { method: 'POST', headers })
   t.is(await response.text(), 'cid malware detection processed')
   t.is(response.status, 201)
 })
 
 test('POST / handles safe urls', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch(`http://localhost:8787/?cid=${safeCid}`, { method: 'POST' })
+  const response = await mf.dispatchFetch(`http://localhost:8787/?cid=${safeCid}`, { method: 'POST', headers })
   t.is(await response.text(), 'cid malware detection processed')
   t.is(response.status, 201)
 })
 
 test('POST / handles invalid or error urls', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch(`http://localhost:8787/?cid=${errorCid}`, { method: 'POST' })
+  const response = await mf.dispatchFetch(`http://localhost:8787/?cid=${errorCid}`, { method: 'POST', headers })
   t.is(await response.text(), `GOOGLE CLOUD UNABLE TO VERIFY URL "https://${errorCid}.ipfs.link.test" status code "400"`)
   t.is(response.status, 503)
 })
 
 test('POST / handles pending results', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch(`http://localhost:8787/?cid=${pendingCid}`, { method: 'POST' })
+  const response = await mf.dispatchFetch(`http://localhost:8787/?cid=${pendingCid}`, { method: 'POST', headers })
   t.is(await response.text(), 'cid malware detection already processed')
   t.is(response.status, 202)
 })
 
 test('POST / handles overriding existing malware cid', async (t) => {
   const { mf } = t.context
-  const response = await mf.dispatchFetch(`http://localhost:8787/?cid=${malwareCid}`, { method: 'POST' })
+  const response = await mf.dispatchFetch(`http://localhost:8787/?cid=${malwareCid}`, { method: 'POST', headers })
   t.is(await response.text(), 'cid malware detection already processed')
   t.is(response.status, 202)
 })
diff --git a/packages/edge-gateway/README.md b/packages/edge-gateway/README.md
index 859d8c2..d5951f9 100644
--- a/packages/edge-gateway/README.md
+++ b/packages/edge-gateway/README.md
@@ -18,6 +18,7 @@
     wrangler secret put CDN_GATEWAYS_RACE --env $(whoami) # JSON String with array of CDN Gateways URLs (eg. echo -e '["https://freeway.dag.haus"]' | wrangler secret ...)
     wrangler secret put IPFS_GATEWAYS_RACE_L1 --env $(whoami) # JSON String with array of IPFS Gateways URLs (eg. echo -e '["https://ipfs.io","https://dagula.dag.haus"]' | wrangler secret ...)
     wrangler secret put IPFS_GATEWAYS_RACE_L2 --env $(whoami) # JSON String with array of IPFS Gateways URLs (eg. echo -e '["https://cf.dag.haus","https://w3link.mypinata.cloud"]' | wrangler secret ...)
+    wrangler secret put CID_VERIFIER_AUTHORIZATION_TOKEN --env $(whoami) # Get from 1Password
   ```
 
 - `pnpm run publish` - Publish the worker under desired env. An alias for `wrangler publish --env $(whoami)`
diff --git a/packages/edge-gateway/src/bindings.d.ts b/packages/edge-gateway/src/bindings.d.ts
index 8c2c60a..0970ca4 100644
--- a/packages/edge-gateway/src/bindings.d.ts
+++ b/packages/edge-gateway/src/bindings.d.ts
@@ -17,6 +17,7 @@ export interface AnalyticsEngineEvent {
 export interface EnvInput {
   ENV: string
   DEBUG: string
+  CID_VERIFIER_AUTHORIZATION_TOKEN: string
   CID_VERIFIER_ENABLED: string
   CID_VERIFIER_URL: string
   CID_VERIFIER: Fetcher
diff --git a/packages/edge-gateway/src/gateway.js b/packages/edge-gateway/src/gateway.js
index e6f6a6e..adabfd8 100644
--- a/packages/edge-gateway/src/gateway.js
+++ b/packages/edge-gateway/src/gateway.js
@@ -78,7 +78,7 @@ export async function gatewayGet (request, env, ctx) {
     }
   }
 
-  const cidDenylistResponse = await env.CID_VERIFIER.fetch(`${env.CID_VERIFIER_URL}/denylist?cid=${cid}`)
+  const cidDenylistResponse = await env.CID_VERIFIER.fetch(`${env.CID_VERIFIER_URL}/denylist?cid=${cid}`, { headers: { Authorization: `basic ${env.CID_VERIFIER_AUTHORIZATION_TOKEN}` } })
   if (cidDenylistResponse.status !== 204) {
     return cidDenylistResponse
   }
@@ -121,7 +121,7 @@ export async function gatewayGet (request, env, ctx) {
   // Validation layer - resource CID
   const resourceCid = pathname !== '/' ? getCidFromEtag(winnerGwResponse.headers.get('etag') || cid) : cid
   if (winnerGwResponse && pathname !== '/' && resourceCid) {
-    const cidResourceDenylistResponse = await env.CID_VERIFIER.fetch(`${env.CID_VERIFIER_URL}/denylist?cid=${resourceCid}`)
+    const cidResourceDenylistResponse = await env.CID_VERIFIER.fetch(`${env.CID_VERIFIER_URL}/denylist?cid=${resourceCid}`, { headers: { Authorization: `basic ${env.CID_VERIFIER_AUTHORIZATION_TOKEN}` } })
     // Ignore if CID received from gateway in etag header is invalid by any reason
     if (cidResourceDenylistResponse.status !== 204 && cidResourceDenylistResponse.status !== 400) {
       return cidResourceDenylistResponse
@@ -135,7 +135,7 @@ export async function gatewayGet (request, env, ctx) {
   ) {
     // fire and forget. Let cid-verifier process this cid and url if it needs to
     ctx.waitUntil(
-      env.CID_VERIFIER.fetch(`${env.CID_VERIFIER_URL}/?cid=${resourceCid}`, { method: 'POST' })
+      env.CID_VERIFIER.fetch(`${env.CID_VERIFIER_URL}/?cid=${resourceCid}`, { method: 'POST', headers: { Authorization: `basic ${env.CID_VERIFIER_AUTHORIZATION_TOKEN}` } })
     )
   }
 
diff --git a/packages/edge-gateway/test/utils/miniflare.js b/packages/edge-gateway/test/utils/miniflare.js
index 965c839..0850fcb 100644
--- a/packages/edge-gateway/test/utils/miniflare.js
+++ b/packages/edge-gateway/test/utils/miniflare.js
@@ -4,7 +4,8 @@ import { Miniflare } from 'miniflare'
 
 export const secrets = {
   IPFS_GATEWAYS_RACE_L1: '["http://127.0.0.1:9081"]',
-  IPFS_GATEWAYS_RACE_L2: '["http://localhost:9082", "http://localhost:9083"]'
+  IPFS_GATEWAYS_RACE_L2: '["http://localhost:9082", "http://localhost:9083"]',
+  CID_VERIFIER_AUTHORIZATION_TOKEN: 'em9vOnpvbw=='
 }
 
 export function getMiniflare (bindings = {}) {