API sunsets · Meta · checked

Meta Graph API v18.0 expiry on 26 January 2026

Meta Graph API v18.0 expired on 26 January 2026. Since then, calls fall forward to the next oldest usable version, with no error; and every change made since v18.0 applies to calls written for it. The failure is silent: calls still succeed, answered by another version, and no error says so. Meta names v26.0 as the replacement (the latest Graph API version on 8 October 2026, released 29 July 2026). The date has passed, so v18.0 can no longer be recorded as it was; compare the responses you still have with what v26.0 returns. Find every place your code pins v18.0: npx --allow-git=root github:agentwares/api-sunset scan

$ npx --allow-git=root github:agentwares/api-sunset scan

npx --allow-git=root github:agentwares/api-sunset scan lists every API version your code and config pin (Shopify, Meta Graph, Google Ads, HubSpot, Stripe and the rest of this list) with its end date, what breaks and this page's link. It needs no account and no API key, reads your files on your machine and sends nothing; its one request fetches this data. Free and MIT licensed.

The facts

API
Meta Graph APICovers graph.facebook.com/<version>/ calls.
Version
v18.0Released 12 September 2023.
Ended
26 January 2026
After the date
falls forward
Silent?
Yes: no error is returned
Answered by
v21.0The oldest version still usable on 9 October 2026; on the day after the date it was v19.0.
Replacement
v26.0the latest Graph API version on 8 October 2026, released 29 July 2026

What breaks after 26 Jan 2026

How to upgrade

  1. Find every place your code and config pin v18.0: npx --allow-git=root github:agentwares/api-sunset scan prints each file and line, and the variable name for a .env file, never its value.
  2. Read what changed between v18.0 and v26.0 in Meta's notes, and list the calls that touch it.
  3. v18.0 no longer answers as it did, so compare the responses you logged before 26 January 2026 with what v26.0 returns now.
  4. Change the version string, deploy, and watch the first day's responses.

Record your real calls on the old version before the date, and replay them on the new one.

agentcheck runs scheduled checks of an endpoint. A check sends the request you define (a path or a full URL, a method and a body, with your API key as a header, stored encrypted) on a schedule and compares each response with a golden: exact text, contains, a regular expression or a JSON Schema, none of which costs an LLM call. When a response stops matching, it opens an incident and alerts you. Point one check at v18.0 and one at v26.0 with the same golden, and you see which of your calls answer differently before 26 January 2026.

Free: 1 monitored target, hourly checks, badge and public status page. Starter: 3 targets, 5-minute checks, Slack and Discord alerts, 30-day history. Recording the calls your code already makes is a different path: the trace import (POST /api/v1/targets/{id}/traces, or the agentcheck_record MCP tool) takes agent traces, a prompt and an answer, and turns them into checks judged by the LLM judge (Pro). It does not take raw HTTP requests and responses, so for an API the scheduled checks are the way in today.

Migration watch is not built. It would record the calls your code makes to Meta Graph API v18.0 and replay them on v26.0 until 26 January 2026, with nothing to set up, and email you what answers differently. If you would pay for that, say so with one click. The click is counted; nothing else is sent or stored.

Other Meta dates

Every API sunset, by date

Sources

Built only from Meta's own pages. No intent is implied: a date is what the page says on the day it was read. Data: /apis/sunsets.json.

api-sunset is a free tool from agentcheck, which runs scheduled checks of your endpoints and alerts you when an answer changes.