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TAC needs a Premium key, Story leaves the Advanced API

Ankr Team
Docs Team

From 1 November 2026, TAC moves to Premium-only and the Advanced API stops serving Story. Keyless calls and Freemium keys stop working on TAC mainnet and the SPB testnet. Story RPC stays available with a Premium key, as announced in October. No method limits, error codes or rate limits changed on any other network.

Docs​

  • The TAC API reference now uses TAC mainnet in every example and in the Run buttons. The Turin testnet examples are gone, because we no longer serve Turin.
  • The chain list marks Kaia, Story, Optimism and TAC as Premium-only.
  • The Advanced API pages, SDK pages and the OpenAPI spec no longer list story_mainnet or story_aeneid_testnet.

Deprecations and end-of-support​

Premium key required​

NetworkEndpointsFrom
TACmainnet, SPB testnet: EVM JSON-RPC, Tendermint, Cosmos REST and gRPC1 November 2026

From that date, a keyless call or a Freemium key on TAC returns HTTP 403 with -32052. The code does not clear on retry, so a key with the right plan is the only fix.

This follows Kaia, Story and Optimism, which moved to Premium in October.

Story leaves the Advanced API​

NetworkValueFrom
Storystory_mainnet, story_aeneid_testnet1 November 2026

From that date, the Advanced API rejects these values with -32602. A blockchain array that still contains one of them fails as a whole, so the other chains in that request return nothing either.

Worth checking on your side​

  • A keyless TAC endpoint in your configuration is the thing to look for. Search for rpc.ankr.com/tac without a key after it. The same applies to the Tendermint and Cosmos REST endpoints.
  • Remove story_mainnet and story_aeneid_testnet from every Advanced API blockchain list, including multi-chain balance calls such as ankr_getAccountBalance. Omitting blockchain keeps working and queries all supported chains.
  • -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 RPC keys on TAC. Same rate limits, same batch size, same block range, and no method moved between plans.