diff --git a/src/routes/integrations.js b/src/routes/integrations.js
index 94251d9..70cbb6a 100644
--- a/src/routes/integrations.js
+++ b/src/routes/integrations.js
@@ -171,26 +171,40 @@ export async function integrationRoutes(app) {
         const { rows: [loc] } = await pool.query(`SELECT config FROM integrations WHERE slug = 'hotel_location'`)
         const lat = loc?.config?.latitude || '51.5072'
         const lon = loc?.config?.longitude || '-0.1276'
-        // Two separate subscriptions, two separate keys — test each against the
-        // endpoint weather actually uses it for (Spot -> daily, Forecast ->
-        // hourly). forecast_api_key is optional, only tested if set.
-        const errors = []
-        const dailyRes = await fetch(
-          `https://data.hub.api.metoffice.gov.uk/sitespecific/v0/point/daily?latitude=${lat}&longitude=${lon}`,
-          { headers: { apikey: creds.api_key }, signal: AbortSignal.timeout(8000) }
-        )
-        if (dailyRes.status === 401 || dailyRes.status === 403) errors.push('Spot key: invalid or not subscribed to the daily endpoint')
-        else if (!dailyRes.ok) errors.push(`Spot key: daily endpoint returned ${dailyRes.status}`)
+        // Which of Spot vs Forecast actually covers which timestep isn't
+        // documented anywhere we could find, and a first guess (Forecast ->
+        // hourly) turned out wrong live — so this tests every configured key
+        // against every endpoint and reports the full matrix, rather than
+        // assuming, so the actual working combination is on screen instead of
+        // guessed at again.
+        const keys = [['Spot', creds.api_key]]
+        if (creds.forecast_api_key) keys.push(['Forecast', creds.forecast_api_key])
+        const endpoints = ['daily', 'hourly', 'three-hourly']
 
-        if (creds.forecast_api_key) {
-          const hourlyRes = await fetch(
-            `https://data.hub.api.metoffice.gov.uk/sitespecific/v0/point/hourly?latitude=${lat}&longitude=${lon}`,
-            { headers: { apikey: creds.forecast_api_key }, signal: AbortSignal.timeout(8000) }
-          )
-          if (hourlyRes.status === 401 || hourlyRes.status === 403) errors.push('Forecast key: invalid or not subscribed to the hourly endpoint')
-          else if (!hourlyRes.ok) errors.push(`Forecast key: hourly endpoint returned ${hourlyRes.status}`)
+        const results = []
+        for (const [keyName, key] of keys) {
+          for (const endpoint of endpoints) {
+            let outcome
+            try {
+              const res = await fetch(
+                `https://data.hub.api.metoffice.gov.uk/sitespecific/v0/point/${endpoint}?latitude=${lat}&longitude=${lon}`,
+                { headers: { apikey: key }, signal: AbortSignal.timeout(8000) }
+              )
+              if (res.status === 401 || res.status === 403) outcome = 'not subscribed'
+              else if (!res.ok) outcome = `HTTP ${res.status}`
+              else outcome = 'OK'
+            } catch (e) {
+              outcome = `error: ${e.message}`
+            }
+            results.push(`${keyName}/${endpoint}: ${outcome}`)
+          }
         }
-        if (errors.length) throw new Error(errors.join(' | '))
+
+        // Frontend renders `message` when ok, `error` when not — set both to the
+        // same diagnostic text so the full matrix shows up either way.
+        const summary = results.join(' | ')
+        const ok = results.some(r => r.endsWith('OK'))
+        return { ok, message: summary, error: summary }
       }
       else if (req.params.slug === 'sambapos') {
         const errors = []