# OP Sepolia JSON-RPC

**Canonical:** https://apis.io/apis/optimism/sepolia-rpc/  
**Provider:** Optimism — https://apis.io/providers/optimism/  
**Base URL:** https://sepolia.optimism.io  
**Documentation:** https://docs.optimism.io/superchain/networks

OP Sepolia JSON-RPC is one of 10 APIs that [Optimism](https://apis.io/providers/optimism/) publishes on the [APIs.io](https://apis.io/) network, described by an AsyncAPI event-driven specification. Tagged areas include JSON-RPC, Testnet, and Sepolia. The published artifact set on APIs.io includes API documentation and an AsyncAPI specification.

Public Ethereum JSON-RPC endpoint for the OP Sepolia testnet (chain ID 11155420) used for development and integration testing.

## Machine-readable artifacts (2)

- **Documentation** — https://docs.optimism.io/superchain/networks
- **AsyncAPI** — https://raw.githubusercontent.com/api-evangelist/optimism/refs/heads/main/asyncapi/optimism-asyncapi.yml

## Other Optimism APIs (9)

- [OP Mainnet JSON-RPC](https://apis.io/apis/optimism/mainnet-rpc/)
- [Optimism Bridge (Standard Bridge)](https://apis.io/apis/optimism/bridge/)
- [OP Stack](https://apis.io/apis/optimism/op-stack/)
- [Superchain Registry](https://apis.io/apis/optimism/superchain-registry/)
- [Optimism SDK (Viem extension)](https://apis.io/apis/optimism/viem-sdk/)
- [Supersim](https://apis.io/apis/optimism/supersim/)
- [Optimism Etherscan](https://apis.io/apis/optimism/etherscan-explorer/)
- [Optimism Blockscout](https://apis.io/apis/optimism/blockscout-explorer/)
- [Optimism JSON-RPC API](https://apis.io/apis/optimism/optimism-json-rpc-api/)

## Tags

JSON-RPC, Testnet, Sepolia

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