# TzKT Protocols API

**Canonical:** https://apis.io/apis/tezos/tzkt-protocols/  
**Provider:** Tezos — https://apis.io/providers/tezos/  
**Base URL:** https://api.tzkt.io/v1  
**Documentation:** https://api.tzkt.io/#tag/Protocols

TzKT Protocols API is one of 34 APIs that [Tezos](https://apis.io/providers/tezos/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Protocols, Chain Constants, and History. The published artifact set on APIs.io includes API documentation.

The Protocols API returns metadata for each Tezos protocol version including hash, first and last cycle, constants (block time, gas limits, baking rewards), and amendment history. Useful for building analytics that span multiple protocol eras.

## Machine-readable artifacts (1)

- **Documentation** — https://api.tzkt.io/#tag/Protocols

## Other Tezos APIs (12)

- [TzKT Accounts API](https://apis.io/apis/tezos/tzkt-accounts/)
- [TzKT Blocks API](https://apis.io/apis/tezos/tzkt-blocks/)
- [TzKT Operations API](https://apis.io/apis/tezos/tzkt-operations/)
- [TzKT Contracts API](https://apis.io/apis/tezos/tzkt-contracts/)
- [TzKT Big Maps API](https://apis.io/apis/tezos/tzkt-bigmaps/)
- [TzKT Tokens API](https://apis.io/apis/tezos/tzkt-tokens/)
- [TzKT Delegations and Staking API](https://apis.io/apis/tezos/tzkt-delegations-staking/)
- [TzKT Governance API](https://apis.io/apis/tezos/tzkt-governance/)
- [TzKT WebSocket API](https://apis.io/apis/tezos/tzkt-websocket/)
- [Tezos Accounts API](https://apis.io/apis/tezos/tezos-accounts-api/)
- [Tezos BigMaps API](https://apis.io/apis/tezos/tezos-bigmaps-api/)
- [Tezos Blocks API](https://apis.io/apis/tezos/tezos-blocks-api/)

## Tags

Protocols, Chain Constants, History

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/tezos/tzkt-protocols/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/tezos/.