Authenticate production Podium integrations and survive the auth-side failures — OAuth2 access-token expiry storms, refresh-token decay after 90 days of non-use, scope drift on re-grant, secret rotation without downtime, multi-tenant token routing, leakage in commits. Use when hardening token caching, building a refresh-token decay monitor, rotating Podium client credentials, or recovering from 401/403 auth cascades. Trigger with "podium auth", "podium oauth", "podium token refresh", "podium scope drift", "podium credential rotation", "podium multi-location auth".
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Authenticate production Podium integrations and survive the auth-side failures — OAuth2 access-token expiry storms, refresh-token decay after 90 days of non-use, scope drift on re-grant, secret rotation without downtime, multi-tenant token routing, leakage in commits. Use when hardening token caching, building a refresh-token decay monitor, rotating Podium client credentials, or recovering from 401/403 auth cascades. Trigger with "podium auth", "podium oauth", "podium token refresh", "podium scope drift", "podium credential rotation", "podium multi-location auth".
Authenticate a service to the Podium API and operate the auth layer in production. This is not a setup walkthrough — it is the auth code your integration runs at 3am when a refresh token expires after the long weekend, when a Podium admin removes a scope on re-grant, when an agency credential router sends a request to the wrong location, and when on-call needs to rotate a leaked client secret without dropping in-flight call-transcript webhooks.
The six production failures this skill prevents:
Access-token expiry storms — OAuth2 access tokens expire on the order of an hour. Every concurrent request notices expiry simultaneously, races to refresh, the token endpoint rate-limits, and the integration cascades to red. Reactive refresh on 401 is wrong.
Refresh-token decay (90-day non-use clock) — Podium refresh tokens expire after 90 days without use. Integrations with seasonal usage patterns (a campervan retailer's off-season) silently lose access on day 91 and require a full user reconnection.
Scope drift on re-grant — When a Podium organization admin re-grants the OAuth app, the new token's scope set may differ from the old one. Cached tokens start returning 403 on previously-working endpoints. Retrying does not help.
Secret leakage in commits — Podium client secrets are wide-scope and not auto-expiring. A single leaked commit exposes the entire integration. Standard .env hygiene is non-optional.
Multi-tenant credential routing — Agencies managing 50+ Podium organizations cannot use a single env var. Requests sent to the wrong organization silently operate on the wrong location's contacts and webchats with no error.
Rotation without downtime — Rotating a leaked client secret naively drops every in-flight webhook handler. Production rotation needs dual-credential overlap, drained refresh, and a verified health check before the old secret is revoked.
Prerequisites
Python 3.10+ (examples) or Node.js 18+
Podium account with an OAuth app: Settings → Developer → Apps → Create app
client_id, client_secret, redirect_uri from the app's OAuth tab
A user-completed authorization flow producing the initial refresh_token
A secret store the runtime can read at startup and on rotation signal (env var for dev, AWS Secrets Manager / GCP Secret Manager / SOPS for prod)
Instructions
Build in this order. Each section neutralizes one production failure mode.
Cache the access token in-process keyed by organization, and refresh proactively at 80% of TTL behind a single-flight lock so concurrent callers serialize on one refresh.
import asyncio
import time
from dataclasses import dataclass
from typing importOptionalimport httpx
@dataclassclassCachedToken:
value: str
expires_at: float# unix secondsclassPodiumAuth:
TOKEN_URL = "https://accounts.podium.com/oauth/token"def__init__(self, client_id: str, client_secret: str, refresh_token: str):
self.client_id = client_id
self.client_secret = client_secret
self.refresh_token = refresh_token
self._cached: Optional[CachedToken] = Noneself._lock = asyncio.Lock()
asyncdefget_token(self) -> str:
# Refresh at 80% of TTL — token endpoint can throttle if every call refreshesifself._cached and time.time() < self._cached.expires_at - 600:
returnself._cached.value
asyncwithself._lock:
# Re-check inside the lock — another coroutine may have refreshedifself._cached and time.time() < self._cached.expires_at - 600:
returnself._cached.value
awaitself._refresh()
returnself._cached.value
asyncdef_refresh(self) -> None:
asyncwith httpx.AsyncClient(timeout=10) as c:
r = await c.post(
self.TOKEN_URL,
data={
"grant_type": "refresh_token",
"refresh_token": self.refresh_token,
"client_id": self.client_id,
"client_secret": self.client_secret,
},
)
if r.status_code != 200:
raise PodiumAuthError(r.status_code, r.text)
body = r.json()
self._cached = CachedToken(
value=body["access_token"],
expires_at=time.time() + body["expires_in"],
)
# Podium rotates the refresh token on every refresh — persist the new oneif"refresh_token"in body:
self.refresh_token = body["refresh_token"]
awaitself._persist_refresh_token(body["refresh_token"])
classPodiumAuthError(Exception):
def__init__(self, status: int, body: str):
super().__init__(f"Podium auth failed {status}: {body}")
self.status = status
self.body = body
The single-flight lock is non-negotiable. Under burst load (a Shopify webhook fans out 200 review requests at midnight when the access token has just expired), every request races to the token endpoint, Podium throttles, and the burst fails atomically.
Podium rotates the refresh token on every successful refresh. The old refresh token is invalidated immediately. If your process refreshes successfully but crashes before persisting the new refresh token, the next process startup has a dead credential.
Persist the new refresh token to your secret store inside the refresh call, before returning the new access token to the caller:
asyncdef_persist_refresh_token(self, new_refresh: str) -> None:
# Replace with your secret store: AWS Secrets Manager, GCP Secret Manager, SOPS, etc.# Atomic write — temp file + rename, never a partial write.import os, tempfile, json
path = os.environ["PODIUM_REFRESH_TOKEN_FILE"]
fd, tmp = tempfile.mkstemp(dir=os.path.dirname(path), prefix=".podium_refresh.")
try:
with os.fdopen(fd, "w") as f:
json.dump({"refresh_token": new_refresh, "rotated_at": time.time()}, f)
os.replace(tmp, path)
except Exception:
os.unlink(tmp)
raise
Podium refresh tokens die after 90 days of non-use. Track last_used_at alongside the token; warn at day 60, page at day 75, hard-fail at day 85 with instructions for re-authorization.
This protects the seasonal-business case explicitly: a campervan retailer's off-season is exactly the failure mode where naive integrations break silently and ship operators discover it when they reopen for summer.
4. Scope validation on every refresh (neutralizes scope drift)
When a Podium admin re-grants your app, the new access token's scope set is whatever the admin selected — which may be a subset of what you previously had. Validate scopes immediately after each refresh; fail loudly rather than discover the drift on a 403 in production:
REQUIRED_SCOPES = {
"conversations.read",
"conversations.write",
"contacts.read",
"contacts.write",
"reviews.read",
"reviews.write",
}
defvalidate_scopes(token_body: dict) -> None:
granted = set(token_body.get("scope", "").split(" "))
missing = REQUIRED_SCOPES - granted
if missing:
raise PodiumAuthError(
0,
f"Scope drift detected — missing: {sorted(missing)}. ""A Podium org admin must re-grant these scopes in the OAuth app settings.",
)
Wire validate_scopes(body) into _refresh() immediately after the JSON parse, before assigning to self._cached.
Podium client secrets are long-lived and grant access to every endpoint the OAuth app is scoped for. Never put them in source code, log output, or git history.
# .gitignore — verify these are present
.env
.env.local
.env.*.local
podium-credentials.json
podium-refresh-token.json
# Audit the repo for accidentally-committed credentials before this becomes prod
git log --all --full-history --oneline -- .env
grep -rnE "podium.*(client_secret|refresh_token)\s*=\s*['\"]" --include="*.py" --include="*.ts" --include="*.json" .
For prod, encrypt credentials at rest with SOPS + age (Intent Solutions standard) and decrypt in-process — never write the plaintext to disk.
6. Dual-credential rotation runbook (neutralizes downtime on rotation)
When rotating a leaked or aging client secret:
Create the new credential first — in the Podium developer console, generate a new client_secret for the same OAuth app. Both old and new are valid simultaneously for a short window.
Deploy the new secret to your secret store under a versioned key (podium/client_secret_v2).
Signal the running process to reload (SIGHUP, env var change trigger, or rolling restart). The token cache picks up the new secret on the next refresh.
Verify with a health-check call — fetch the OAuth token info endpoint and confirm the response carries the expected client_id.
Revoke the old secret in the Podium console only after the health check passes and queue depth has drained.
asyncdefverify_credential(token: str) -> bool:
asyncwith httpx.AsyncClient(timeout=5) as c:
r = await c.get(
"https://api.podium.com/v4/me",
headers={"Authorization": f"Bearer {token}"},
)
return r.status_code in (200, 204)
