diff --git a/packages/sidecar/src/commands.ts b/packages/sidecar/src/commands.ts
index 8760a5b..ae8dd6e 100644
--- a/packages/sidecar/src/commands.ts
+++ b/packages/sidecar/src/commands.ts
@@ -113,7 +113,9 @@ export async function resolveRoomyOrigin(service: string, fetcher: typeof fetch
   const response = await fetcher(didUrl)
   if (!response.ok) throw new Error(`Could not resolve Roomy service (${response.status})`)
   const document = await response.json() as { service?: Array<{ id?: unknown; serviceEndpoint?: unknown }> }
-  const endpoint = document.service?.find((entry) => entry.id === `${service}#space_roomy_appserver`)?.serviceEndpoint
+  const endpoint = document.service?.find((entry) =>
+    entry.id === '#space_roomy_appserver' || entry.id === `${service}#space_roomy_appserver`
+  )?.serviceEndpoint
   if (typeof endpoint !== 'string' || !endpoint.startsWith('https://')) throw new Error('Roomy DID document has no HTTPS appserver endpoint')
   return new URL(endpoint).origin
 }
diff --git a/packages/sidecar/test/roomy-origin.test.mjs b/packages/sidecar/test/roomy-origin.test.mjs
new file mode 100644
index 0000000..47c83d5
--- /dev/null
+++ b/packages/sidecar/test/roomy-origin.test.mjs
@@ -0,0 +1,18 @@
+import assert from 'node:assert/strict'
+import { describe, it } from 'node:test'
+import { resolveRoomyOrigin } from '../dist/index.js'
+
+const response = (body) => new Response(JSON.stringify(body))
+
+describe('Roomy appserver origin', () => {
+  for (const id of ['#space_roomy_appserver', 'did:web:api.roomy.space#space_roomy_appserver']) {
+    it(`resolves the ${id.startsWith('#') ? 'relative' : 'absolute'} DID service id`, async () => {
+      const fetcher = async (input) => {
+        assert.equal(String(input), 'https://api.roomy.space/.well-known/did.json')
+        return response({ service: [{ id, serviceEndpoint: 'https://roomy.example/xrpc' }] })
+      }
+
+      assert.equal(await resolveRoomyOrigin('did:web:api.roomy.space', fetcher), 'https://roomy.example')
+    })
+  }
+})
diff --git a/packages/ui/src/lib/roomy.test.ts b/packages/ui/src/lib/roomy.test.ts
index 2ce6ed9..26de78c 100644
--- a/packages/ui/src/lib/roomy.test.ts
+++ b/packages/ui/src/lib/roomy.test.ts
@@ -12,7 +12,7 @@ describe('Roomy browser reader', () => {
   it('resolves the DID, skips malformed rows, and reports truncation', async () => {
     const fetcher: typeof fetch = async (input) => {
       const url = String(input)
-      if (url.includes('did.json')) return response({ service: [{ id: 'did:web:roomy.example#space_roomy_appserver', serviceEndpoint: 'https://api.roomy.example' }] })
+      if (url.includes('did.json')) return response({ service: [{ id: '#space_roomy_appserver', serviceEndpoint: 'https://api.roomy.example' }] })
       if (url.includes('getMetadata')) return response({ name: 'Design thread' })
       return response({ messages: [{ id: 'm1', authorDid: 'did:plc:a', content: 'hello', timestamp: '2026-01-01T00:00:00Z' }, { nope: true }], cursor: 'older' })
     }
diff --git a/packages/ui/src/lib/roomy.ts b/packages/ui/src/lib/roomy.ts
index 09f37c4..323d50e 100644
--- a/packages/ui/src/lib/roomy.ts
+++ b/packages/ui/src/lib/roomy.ts
@@ -48,7 +48,9 @@ export function resolveRoomyOrigin(service: string, fetcher: typeof fetch = fetc
     try { response = await fetcher(url) } catch { throw new RoomyError('unreachable', 'The Roomy service could not be reached.') }
     if (!response.ok) throw new RoomyError('unreachable', `The Roomy service DID could not be resolved (${response.status}).`)
     const document = await response.json() as { service?: Array<{ id?: unknown; serviceEndpoint?: unknown }> }
-    const endpoint = document.service?.find((entry) => entry.id === `${service}#space_roomy_appserver`)?.serviceEndpoint
+    const endpoint = document.service?.find((entry) =>
+      entry.id === '#space_roomy_appserver' || entry.id === `${service}#space_roomy_appserver`
+    )?.serviceEndpoint
     if (typeof endpoint !== 'string' || !endpoint.startsWith('https://')) throw new RoomyError('invalid', 'The Roomy service has no HTTPS appserver endpoint.')
     return new URL(endpoint).origin
   })()