diff --git a/packages/access-api/src/bindings.d.ts b/packages/access-api/src/bindings.d.ts
index 32b78f9dc..c154304fb 100644
--- a/packages/access-api/src/bindings.d.ts
+++ b/packages/access-api/src/bindings.d.ts
@@ -5,6 +5,7 @@ import { Email } from './utils/email.js'
 import { Spaces } from './models/spaces.js'
 import { Validations } from './models/validations.js'
 import { loadConfig } from './config.js'
+import { Signer as EdSigner } from '@ucanto/principal/ed25519'
 
 export {}
 
@@ -42,7 +43,7 @@ export interface Env {
 
 export interface RouteContext {
   log: Logging
-  signer: Signer
+  signer: EdSigner.Signer
   config: ReturnType<typeof loadConfig>
   url: URL
   email: Email
diff --git a/packages/access-api/src/config.js b/packages/access-api/src/config.js
index dff5f0a27..8539ce521 100644
--- a/packages/access-api/src/config.js
+++ b/packages/access-api/src/config.js
@@ -119,7 +119,7 @@ export function createAnalyticsEngine() {
  * @param {object} config
  * @param {string} config.PRIVATE_KEY - multiformats private key of primary signing key
  * @param {string} [config.DID] - public DID for the service (did:key:... derived from PRIVATE_KEY if not set)
- * @returns {import('@ucanto/interface').Signer}
+ * @returns {Signer.Signer}
  */
 export function configureSigner(config) {
   const signer = Signer.parse(config.PRIVATE_KEY)
diff --git a/packages/access-api/src/routes/version.js b/packages/access-api/src/routes/version.js
index 015f0223a..fb9f3d498 100644
--- a/packages/access-api/src/routes/version.js
+++ b/packages/access-api/src/routes/version.js
@@ -7,5 +7,6 @@ export async function version(event, env, ctx) {
     commit: env.config.COMMITHASH,
     branch: env.config.BRANCH,
     did: env.signer.did(),
+    publicKey: env.signer.verifier.toDIDKey(),
   })
 }