---
title: "PostValidatorSyncCommitteeSubscriptions"
method: POST
path: "/{apiKey}/eth/v1/validator/sync_committee_subscriptions"
---

# PostValidatorSyncCommitteeSubscriptions

`POST /{apiKey}/eth/v1/validator/sync_committee_subscriptions`

Subscribe to sync committee subnets.

Sync committees are not present in phase0, but are required for Altair networks.

Subscribing to sync committee subnets is an action performed by VC to enable network participation in Altair networks, and only required if the VC has an active validator in an active sync committee.

## Path parameters

- `apiKey` string, required — <style> .custom-style { color: #048FF4; } </style> For higher throughput, please <span class="custom-style"><a href="../docs/quick-start-guide#-creating-your-api-key-on-the-zan-platform" target="_blank">create your own API key</a></span>.

## Request body

- object[]
  - `validator_index` string, required
  - `sync_committee_indices` string[], required
  - `until_epoch` string, required — The final epoch (exclusive value) that the specified validator requires the subscription for.

## Response `200`

Successful response

---

[API](https://skmtc.dev/zan/apis/zan-getnftmetadata.md) · [All operations](https://skmtc.dev/zan/apis/zan-getnftmetadata/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/zan/zan-getnftmetadata/revisions/be8fa2338895/schema)