CrossFi Testnet (CFI) Overview - Uniblock Docs

CrossFi Testnet is an EVM-compatible testnet. It is a testnet for CrossFi. Its ticker symbol is CFI. Use Uniblock’s JSON-RPC endpoint to read chain state, send transactions, and interact with smart contracts through a single API surface across providers.

Connect to CrossFi Testnet

Send JSON-RPC requests with POST to: https://api.uniblock.dev/uni/v1/json-rpc?chainId=4157 Include the JSON-RPC method and parameters in the request body.

Example request

Make a simple eth_blockNumber request with cURL:

curl --request POST 'https://api.uniblock.dev/uni/v1/json-rpc?chainId=4157' \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: YOUR_UNIBLOCK_API_KEY' \
  --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

Network	Symbol	Type	Chain ID
CrossFi	`XFI`	Mainnet	`4158`
CrossFi Testnet	`CFI`	Testnet	`4157`

API reference

Browse the available method groups for this chain:

Debug
EVM

⌘I