monday.com API Version Migrations — when and how should I migrate?

Teams maintaining monday.com apps need to decide whether to pin to the newest supported API version now or keep patching around deprecated 2024-10 and 2025-01 behavior after the February 15, 2026 cutoff.

Pin production to 2026-01 now if you can fund one real migration pass; use 2025-10 only when testing or typed-client blockers make a short bridge unavoidable.

Blockers

Who this is for

Candidates

Pin production to API version 2026-01 now

As of 2026-03-21, monday.com lists `2026-01` as the Current version, `2025-10` as Maintenance, and `2026-04` as the Release candidate. monday recommends that production apps pass an explicit `API-Version` header on every call, and the Current version is the default if no header is sent. The February 15, 2026 deprecation of `2024-10` and `2025-01` has already occurred, so continuing to call those versions no longer preserves their original behavior. Moving directly to `2026-01` avoids a second migration hop from `2025-04` or `2025-10` later.

When to choose

Use this when you can budget one real migration pass now and want the longest stable runway. It is the cleanest choice for teams that want to stop carrying compatibility shims around deprecated error shapes and routed behavior.

Tradeoffs

Best long-term stability and least ambiguity, but requires validating your app against the current schema and current-version behavior now.

Cautions

Do not use `2026-04` in production just because it is newer; monday marks Release candidate versions as unstable and not for production. Also do not rely on docs alone without sending the version header, because unpinned requests get the Current version automatically.

Sources

Pin production to API version 2025-10 as a short-term stabilization step

As of 2026-03-21, `2025-10` is the Maintenance version and monday says Maintenance is still stable for production, but is recommended only when you are unable to migrate to the Current version on time. This gives teams a supported stable target without jumping straight to `2026-01`. It is materially safer than leaving calls on deprecated `2024-10` or `2025-01`, because those deprecated versions were already routed away after February 15, 2026. This option works as a temporary landing zone if your codebase needs phased cleanup.

When to choose

Use this when migration capacity is limited and you need a supported version pin immediately while scheduling a second pass to `2026-01`. It is a pragmatic bridge for teams blocked on testing or typed-client updates.

Tradeoffs

Lower immediate migration risk than jumping straight to Current, but it knowingly creates another migration step later and shortens your runway.

Cautions

This is not equivalent to preserving `2024-10` or `2025-01` semantics. monday's deprecation notice says calls to those versions are automatically routed to `2025-04`, and the migration guide calls out breaking changes such as GraphQL-standard error responses for `2024-10` users, updated complexity budget exhausted error format, changed `create_webhook` errors, subitems query changes, and a unique request ID in all API responses.

Sources

Keep calling deprecated 2024-10 or 2025-01 and patch around breakage

As of 2026-03-21, this is no longer a real versioning strategy because the February 15, 2026 deprecation has already occurred. monday's deprecation notice and migration guide both state that calls to `2024-10` and `2025-01` are automatically routed to `2025-04` after that date. That means you no longer control behavior by naming the deprecated version, and any code that assumes old response formats can still break. This path preserves the most operational ambiguity while giving up the benefits of an explicit supported pin.

When to choose

Use this only as an emergency stopgap while preparing an immediate explicit version pin. It is not appropriate as a steady-state production plan.

Tradeoffs

Lowest short-term engineering effort, but highest debugging cost and weakest predictability because request intent and actual executed version diverge.

Cautions

For `2024-10` users, monday specifically calls out the `2025-01` shift to GraphQL-standard error responses as an extra breaking change. For both `2024-10` and `2025-01` users, the `2025-04` migration guide also flags error-format changes and webhook/subitems behavior changes that can break strict parsers and snapshot tests.

Sources

Facts updated: 2026-03-21
Published: 2026-04-03

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