# Overview

## Network Support

<table><thead><tr><th width="292">Network</th><th>HTTPS</th><th>WSS</th></tr></thead><tbody><tr><td>Pubnet: Horizon &#x26; Soroban (90 day history)</td><td>✅</td><td>❌</td></tr><tr><td>Testnet: Horizon &#x26; Soroban (90 day history)</td><td>✅</td><td>❌</td></tr><tr><td>Pubnet: Horizon (1 Year History)</td><td>✅</td><td>❌</td></tr></tbody></table>

#### Stellar SSE Streaming

We recently introduced an updated Compute Unit (CU) model for **Server-Sent Events (SSE)** streaming on Stellar Horizon API endpoints. SSE allows developers to receive real-time updates without the need for continuous polling.

**Pricing Model**

SSE-enabled Stellar endpoints use a two-part pricing structure:

* **Base cost per request:** 20 CUs (same as standard Stellar endpoints)
* **Data streaming cost:** 1 CU per KB of data streamed to the client

This differs from standard Stellar endpoints, which only charge the base request cost and do not include any data-based pricing.

**Compute Unit Calculation**

```
Total CUs = (20 × number of requests) + (1 × response size in KB)
```

```
Total CUs = (cu_amount × requests) + ((response_size_bytes / 1024) × cu_per_kb)
```

**Key Difference**

* **Standard endpoints:** Fixed cost per request (no data-based charges)
* **SSE endpoints:** Base request cost plus variable cost based on streamed data volume

## Compute Units

#### SSE Streaming Endpoints

Certain Stellar Horizon endpoints support **Server-Sent Events (SSE)**, allowing clients to receive real-time updates instead of polling.

> **Compute Units:** When used in streaming mode, these endpoints are charged at **20 CUs per request** plus **1 CU per KB of data streamed**.

The following endpoints support SSE streaming:

***

**Top-level endpoints**

* GET /ledgers
* GET /transactions
* GET /operations
* GET /payments
* GET /effects
* GET /trades

***

**Account-specific endpoints**

* GET /accounts/{account\_id}/transactions
* GET /accounts/{account\_id}/operations
* GET /accounts/{account\_id}/payments
* GET /accounts/{account\_id}/effects
* GET /accounts/{account\_id}/trades
* GET /accounts/{account\_id}/offers

***

**Ledger-specific endpoints**

* GET /ledgers/{ledger\_sequence}/transactions
* GET /ledgers/{ledger\_sequence}/operations
* GET /ledgers/{ledger\_sequence}/payments
* GET /ledgers/{ledger\_sequence}/effects

***

**Liquidity pool endpoints**

* GET /liquidity\_pools/{liquidity\_pool\_id}/effects
* GET /liquidity\_pools/{liquidity\_pool\_id}/trades
* GET /liquidity\_pools/{liquidity\_pool\_id}/transactions
* GET /liquidity\_pools/{liquidity\_pool\_id}/operations

***

**Transaction & operation endpoints**

* GET /operations/{operation\_id}/effects
* GET /transactions/{transaction\_id}/operations
* GET /transactions/{transaction\_id}/effects

***

**Offer endpoints**

* GET /offers/{offer\_id}/trades

***

**Claimable balance endpoints**

* GET /claimable\_balances/{claimable\_balance\_id}/transactions
* GET /claimable\_balances/{claimable\_balance\_id}/operations

### Stellar RPC (formerly known as Soroban)

<table data-header-hidden><thead><tr><th></th><th width="100"></th></tr></thead><tbody><tr><td>getEvents</td><td>10</td></tr><tr><td>getFeeStats</td><td>10</td></tr><tr><td>getHealth</td><td>10</td></tr><tr><td>getLatestLedger</td><td>10</td></tr><tr><td>getLedgerEntries</td><td>10</td></tr><tr><td>getLedgers</td><td>10</td></tr><tr><td>getNetwork</td><td>10</td></tr><tr><td>getTransaction</td><td>10</td></tr><tr><td>getTransactions</td><td>10</td></tr><tr><td>getVersionInfo</td><td>10</td></tr><tr><td>sendTransaction</td><td>10</td></tr><tr><td>simulateTransaction</td><td>10</td></tr></tbody></table>

### Horizon

<table data-header-hidden><thead><tr><th width="487"></th><th width="100"></th></tr></thead><tbody><tr><td>GET /accounts</td><td>20</td></tr><tr><td>GET /accounts/:account_id</td><td>20</td></tr><tr><td>GET /accounts/:account_id/transactions</td><td>20</td></tr><tr><td>GET /accounts/:account_id/operations</td><td>20</td></tr><tr><td>GET /accounts/:account_id/payments</td><td>20</td></tr><tr><td>GET /accounts/:account_id/effects</td><td>20</td></tr><tr><td>GET /accounts/:account_id/offers</td><td>20</td></tr><tr><td>GET /accounts/:account_id/trades</td><td>20</td></tr><tr><td>GET /accounts/:account_id/data/:key</td><td>20</td></tr><tr><td>GET /assets</td><td>20</td></tr><tr><td>GET /claimable_balances</td><td>20</td></tr><tr><td>GET /claimable_balances/:claimable_balance_id</td><td>20</td></tr><tr><td>GET /claimable_balances/:claimable_balance_id/transactions</td><td>20</td></tr><tr><td>GET /claimable_balances/:claimable_balance_id/operations</td><td>20</td></tr><tr><td>GET /effects</td><td>20</td></tr><tr><td>GET /fee_stats</td><td>10</td></tr><tr><td>GET /ledgers/:sequence</td><td>20</td></tr><tr><td>GET /ledgers/:sequence/transactions</td><td>20</td></tr><tr><td>GET /ledgers/:sequence/payments</td><td>20</td></tr><tr><td>GET /ledgers/:sequence/operations</td><td>20</td></tr><tr><td>GET /ledgers/:sequence/effects</td><td>20</td></tr><tr><td>GET /ledgers</td><td>20</td></tr><tr><td>GET /liquidity_pools</td><td>20</td></tr><tr><td>GET /liquidity_pools/:liquidity_pool_id</td><td>20</td></tr><tr><td>GET /liquidity_pools/:liquidity_pool_id/effects</td><td>20</td></tr><tr><td>GET /liquidity_pools/:liquidity_pool_id/trades</td><td>20</td></tr><tr><td>GET /liquidity_pools/:liquidity_pool_id/transactions</td><td>20</td></tr><tr><td>GET /liquidity_pools/:liquidity_pool_id/operations</td><td>20</td></tr><tr><td>GET /offers</td><td>20</td></tr><tr><td>GET /offers/:offer_id</td><td>20</td></tr><tr><td>GET /offers/:offer_id/trades</td><td>20</td></tr><tr><td>GET /operations/:id</td><td>20</td></tr><tr><td>GET /operations/:id/effects</td><td>20</td></tr><tr><td>GET /operations</td><td>20</td></tr><tr><td>GET /order_book</td><td>10</td></tr><tr><td>GET /paths/strict-receive</td><td>10</td></tr><tr><td>GET /paths/strict-send</td><td>10</td></tr><tr><td>GET /payments</td><td>20</td></tr><tr><td>GET /transactions/:transaction_hash/payments</td><td>10</td></tr><tr><td>GET /trades</td><td>20</td></tr><tr><td>GET /trade_aggregations</td><td>40</td></tr><tr><td>GET /transactions/:transaction_hash</td><td>20</td></tr><tr><td>GET /transactions/:transaction_hash/operations</td><td>20</td></tr><tr><td>GET /transactions/:transaction_hash/effects</td><td>20</td></tr><tr><td>GET /transactions</td><td>20</td></tr><tr><td>POST /transactions</td><td>20</td></tr></tbody></table>


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