# Overview

Tempo is a purpose-built Layer 1 blockchain designed for payments. It is EVM-compatible and built to support high-throughput, low-latency transaction flows, with sub-second finality and near-zero transaction fees.

Tempo is optimized for stablecoin payments and supports payment-specific functionality such as batch transfers, memo fields, compliance tooling including blocklists and allowlists, and the ability to pay transaction fees in supported stablecoins.

Block explorer: <https://explore.tempo.xyz>

### Network Support

| Network                  | Full History / Archive | HTTPS | WSS |
| ------------------------ | ---------------------- | ----- | --- |
| Tempo Mainnet            | ✅                      | ✅     | ✅   |
| Tempo Testnet (Moderato) | ✅                      | ✅     | ✅   |

> WebSocket clients **MUST** respond to server `ping` frames, otherwise the connection will be closed and re-established every minute.

## Methods & Compute Units

<table data-header-hidden><thead><tr><th></th><th width="100"></th></tr></thead><tbody><tr><td>debug_traceBlockByHash</td><td>80</td></tr><tr><td>debug_traceBlockByNumber</td><td>80</td></tr><tr><td>debug_traceCall</td><td>80</td></tr><tr><td>debug_traceTransaction</td><td>80</td></tr><tr><td>eth_blockNumber</td><td>20</td></tr><tr><td>eth_call</td><td>40</td></tr><tr><td>eth_chainId</td><td>10</td></tr><tr><td>eth_estimateGas</td><td>40</td></tr><tr><td>eth_feeHistory</td><td>20</td></tr><tr><td>eth_gasPrice</td><td>40</td></tr><tr><td>eth_getBalance</td><td>40</td></tr><tr><td>eth_getBlockByHash</td><td>40</td></tr><tr><td>eth_getBlockByNumber</td><td>40</td></tr><tr><td>eth_getBlockReceipts</td><td>40</td></tr><tr><td>eth_getBlockTransactionCountByHash</td><td>40</td></tr><tr><td>eth_getBlockTransactionCountByNumber</td><td>40</td></tr><tr><td>eth_getCode</td><td>40</td></tr><tr><td>eth_getFilterChanges</td><td>40</td></tr><tr><td>eth_getFilterLogs</td><td>40</td></tr><tr><td>eth_getLogs</td><td>80</td></tr><tr><td>eth_getProof</td><td>40</td></tr><tr><td>eth_getStorageAt</td><td>40</td></tr><tr><td>eth_getTransactionByBlockHashAndIndex</td><td>40</td></tr><tr><td>eth_getTransactionByBlockNumberAndIndex</td><td>40</td></tr><tr><td>eth_getTransactionByHash</td><td>40</td></tr><tr><td>eth_getTransactionCount</td><td>40</td></tr><tr><td>eth_getTransactionReceipt</td><td>40</td></tr><tr><td>eth_getUncleCountByBlockHash</td><td>40</td></tr><tr><td>eth_getUncleCountByBlockNumber</td><td>40</td></tr><tr><td>eth_newBlockFilter</td><td>40</td></tr><tr><td>eth_newFilter</td><td>40</td></tr><tr><td>eth_newPendingTransactionsFilter</td><td>40</td></tr><tr><td>eth_sendRawTransaction</td><td>80</td></tr><tr><td>eth_subscribe</td><td>20</td></tr><tr><td>eth_syncing</td><td>10</td></tr><tr><td>eth_uninstallFilter</td><td>20</td></tr><tr><td>eth_unsubscribe</td><td>20</td></tr><tr><td>eth_syncing</td><td>10</td></tr><tr><td>net_listening</td><td>10</td></tr><tr><td>net_peercount</td><td>20</td></tr><tr><td>net_version</td><td>10</td></tr><tr><td>trace_block</td><td>80</td></tr><tr><td>trace_call</td><td>80</td></tr><tr><td>trace_filter</td><td>80</td></tr><tr><td>trace_replayBlockTransactions</td><td>270</td></tr><tr><td>trace_replayTransaction</td><td>270</td></tr><tr><td>trace_transaction</td><td>80</td></tr><tr><td>web3_clientVersion</td><td>40</td></tr><tr><td>web3_sha3</td><td>40</td></tr></tbody></table>

### Endpoint Capabilities

Tempo endpoints support both HTTP and WebSocket connectivity for production-grade applications.

#### HTTP

Best suited for:

* backend services and APIs
* blockchain data queries
* smart contract deployment and interaction
* development and testing workflows

#### WebSocket

Best suited for:

* real-time transaction monitoring
* event subscriptions
* live dashboards and analytics
* applications that require low-latency data delivery

### Getting Started

To start building on Tempo, connect your application to a Tempo endpoint and send standard Ethereum JSON-RPC requests.

Example request:

{% tabs %}
{% tab title="testnet" %}

```bash
curl https://testnet.tempo.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":0}'

```

{% endtab %}
{% endtabs %}