> ## Documentation Index
> Fetch the complete documentation index at: https://docs.uniblock.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Injective Testnet (INJ) Overview

Injective Testnet (INJ) RPC

Use Uniblock's JSON-RPC endpoint to access Injective Testnet (INJ) with low-latency routing and a single API surface across providers.

## What is Injective Testnet?

Injective Testnet is an EVM-compatible testnet. It is a testnet for Injective. Its ticker symbol is `INJ`.

## What is the Injective Testnet (INJ) JSON-RPC API?

The JSON-RPC API is the standard interface for reading chain state, sending transactions, and interacting with smart contracts where supported.

## Making API requests

Send a POST request to `https://api.uniblock.dev/uni/v1/json-rpc?chainId=1439`. Include the JSON-RPC method and params in the request body.

## Supported networks

| Network           | Symbol | Type    | Chain ID |
| ----------------- | ------ | ------- | -------- |
| Injective         | `INJ`  | Mainnet | `1776`   |
| Injective Testnet | `INJ`  | Testnet | `1439`   |

## API reference

Browse the available method groups for this chain:

* [Debug](/reference/jsonrpc-docs/1439/debug/debug-trace-block-by-hash)
* [EVM](/reference/jsonrpc-docs/1439/evm/eth-block-number)