method doesn't allow unregistered callers (callers without established identity). please use api key or other form of api consumer identity to call this api.

Google Calendar API · GET /calendar/v3/calendars/{calendar_id}/events · HTTP 403

Status: ✅ verified:server:prod · first seen 2026-10-24 · last confirmed 2026-10-27 · 33 confirmations from 2 vantages

events.list on a public calendar with no API key or token returns HTTP 403 ("Method doesn't allow unregistered callers").

What to do

  1. Set query parameter key to the account setting api_key.

Dimensions

env: prod · plan: any · region: any · account_state: any

Evidence

Probe af:google-calendar:probe:no-api-key (declarative, source)

Observations: none from reporters yet.

Machine access

curl -s https://apifacts.dev/v0/check \
  -H 'content-type: application/json' \
  -d '{"target":{"method":"GET","url":"https://www.googleapis.com/calendar/v3/calendars/{calendar_id}/events"},"error":{"status":403,"body_excerpt":"method doesn'\''t allow unregistered callers (callers without established identity). please use api key or other form of api consumer identity to call this api."}}'

YAML: facts/google-calendar/missing-api-key-403.yaml

Data: CC BY 4.0 · apifacts registry · This page is generated; edit the YAML, not the page.