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For the complete documentation index, see llms.txt. This page is also available as Markdown.

Overview

Network Support

Network
HTTPS
WSS

Pubnet: Horizon (90 day history) & Stellar RPC (7 day history)

✅

❌

Testnet: Horizon (full history since the latest testnet reset) & Stellar RPC (7 day history)

✅

❌

Pubnet Archive: Horizon only (1 year history)

✅

❌

History retention: Horizon on Pubnet lets you query the most recent 90 days of history, and the Pubnet Archive endpoint extends this to 1 year (the archive endpoint serves Horizon only; Stellar RPC is not available on it). Stellar RPC (formerly Soroban) serves the most recent 7 days of history on both Pubnet and Testnet, which is the Stellar network-standard retention window. Horizon on Testnet serves full history back to the most recent Stellar testnet reset; the Stellar Development Foundation periodically resets testnet, and history restarts from each reset.

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)

getEvents

10

getFeeStats

10

getHealth

10

getLatestLedger

10

getLedgerEntries

10

getLedgers

10

getNetwork

10

getTransaction

10

getTransactions

10

getVersionInfo

10

sendTransaction

10

simulateTransaction

10

Horizon

GET /accounts

20

GET /accounts/:account_id

20

GET /accounts/:account_id/transactions

20

GET /accounts/:account_id/operations

20

GET /accounts/:account_id/payments

20

GET /accounts/:account_id/effects

20

GET /accounts/:account_id/offers

20

GET /accounts/:account_id/trades

20

GET /accounts/:account_id/data/:key

20

GET /assets

20

GET /claimable_balances

20

GET /claimable_balances/:claimable_balance_id

20

GET /claimable_balances/:claimable_balance_id/transactions

20

GET /claimable_balances/:claimable_balance_id/operations

20

GET /effects

20

GET /fee_stats

10

GET /ledgers/:sequence

20

GET /ledgers/:sequence/transactions

20

GET /ledgers/:sequence/payments

20

GET /ledgers/:sequence/operations

20

GET /ledgers/:sequence/effects

20

GET /ledgers

20

GET /liquidity_pools

20

GET /liquidity_pools/:liquidity_pool_id

20

GET /liquidity_pools/:liquidity_pool_id/effects

20

GET /liquidity_pools/:liquidity_pool_id/trades

20

GET /liquidity_pools/:liquidity_pool_id/transactions

20

GET /liquidity_pools/:liquidity_pool_id/operations

20

GET /offers

20

GET /offers/:offer_id

20

GET /offers/:offer_id/trades

20

GET /operations/:id

20

GET /operations/:id/effects

20

GET /operations

20

GET /order_book

10

GET /paths/strict-receive

10

GET /paths/strict-send

10

GET /payments

20

GET /transactions/:transaction_hash/payments

10

GET /trades

20

GET /trade_aggregations

40

GET /transactions/:transaction_hash

20

GET /transactions/:transaction_hash/operations

20

GET /transactions/:transaction_hash/effects

20

GET /transactions

20

POST /transactions

20

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