API Reference

Architecture

Historical State Archive
- Accounts, blocks, and deltas are stored in Parquet for fast deterministic queries.
Replay Environment
- A Solana-compatible execution layer that replays historical transactions and applies injected ones.
Session Control (WebSocket)
- Endpoint: ws(s)://<host>/backtest
- Methods: createBacktestSession, continue, closeBacktestSession
- Response events: sessionCreated, readyForContinue, slotNotification, accountNotification, status, completed, error
Per-Session RPC (HTTP + WebSocket)
- Endpoint: http(s)://<host>/backtest/{session_id}
- WebSocket subscriptions: ws(s)://<host>/backtest/{session_id}
- Supported JSON-RPC methods include:
  - getAccountInfo, getBalance, getMultipleAccounts, getProgramAccounts
  - getLatestBlockhash, getFeeForMessage, getSignatureStatuses, getTransaction
  - simulateTransaction, sendTransaction, getSlot, getAddressLookupTable
  - modifyAccounts

Note: /backtest is authenticated by API key in production. /backtest/{session_id} is unauthenticated for per-session access.

API Table

Method

Purpose

Surface

createBacktestSession

Start a backtest session and receive sessionId + rpcEndpoint.

Session control (WS)

continue

Execute a batch and advance slots; supports transactions + modifyAccountStates.

Session control (WS)

closeBacktestSession

Close and clean up a session.

Session control (WS)

getAccountInfo

Fetch a single account at current slot.

Per-session RPC (HTTP)

getBalance

Fetch lamport balance for an account.

Per-session RPC (HTTP)

getMultipleAccounts

Fetch multiple accounts in one call.

Per-session RPC (HTTP)

getProgramAccounts

Fetch accounts owned by a program.

Per-session RPC (HTTP)

getLatestBlockhash

Get current slot blockhash.

Per-session RPC (HTTP)

getFeeForMessage

Get fee estimate for a message.

Per-session RPC (HTTP)

getSignatureStatuses

Fetch status for signatures.

Per-session RPC (HTTP)

getTransaction

Fetch transaction details (including logs).

Per-session RPC (HTTP)

simulateTransaction

Simulate a transaction without committing state.

Per-session RPC (HTTP)

sendTransaction

Execute a transaction immediately in the current slot.

Per-session RPC (HTTP)

getSlot

Get the current slot.

Per-session RPC (HTTP)

getAddressLookupTable

Fetch an ALT account.

Per-session RPC (HTTP)

modifyAccounts

Apply account overrides via RPC.

Per-session RPC (HTTP)

accountSubscribe

Stream account changes.