API error codes
The GetItDone API returns RFC 9457 application/problem+json error documents. Switch on the stable code — never on the human-readable title.
401
missing_credentialsMissing credentials401invalid_api_keyInvalid API key401invalid_tokenInvalid access token403insufficient_scopeInsufficient scope403feature_not_enabledFeature not enabled on this plan400validation_failedRequest validation failed404resource_not_foundResource not found429rate_limitedRate limit exceeded429quota_exhaustedPlan quota exhausted400idempotency_key_missingIdempotency-Key header required422idempotency_key_reusedIdempotency-Key reused with a different request409idempotency_in_progressA request with this Idempotency-Key is still in progress422webhook_url_rejectedWebhook endpoint URL rejected409delivery_already_pendingA delivery for this event is already queued500internal_errorInternal server error