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Kaia, Story and Optimism need a Premium key

Ankr Team
Docs Team

Kaia, Story and Optimism move to Premium-only in the second half of October, mainnet and testnet for each. Keyless calls and Freemium keys stop working on the dates below. Premium and Enterprise keys keep working with no change, and no method limits, error codes or rate limits changed on any other network.

Deprecations and end-of-support​

Premium key required​

NetworkEndpointsFrom
Kaiamainnet, Kairos testnet17 October 2026
Storymainnet, Aeneid testnet22 October 2026
Optimismmainnet, Sepolia testnet27 October 2026

From its date, a keyless call or a Freemium key on Kaia or Story returns HTTP 403 with -32052. The code does not clear on retry, so a key with the right plan is the only fix. Optimism already refused keyless calls on rpc.ankr.com, and from 27 October Premium is the only way we serve it.

The networks stay in the chain list, with the same endpoints, methods and API reference pages.

Worth checking on your side​

  • A keyless Kaia or Story endpoint in your configuration is the thing to look for. If you copied rpc.ankr.com/kaia or rpc.ankr.com/story_mainnet without a key, it stops answering on the date above.
  • -32052 on a Freemium key means the network needs Premium. See Service plans to upgrade, then use the same key.
  • Nothing changes for Premium and Enterprise keys. Same rate limits, same batch size, same block range, and no method moved between plans.