Parse Transactions

Parse Solana transaction signatures into structured, human-readable data with the Helius Enhanced Transactions API.

The Enhanced Transactions API is a legacy product in maintenance mode. It still works and these pages remain available, but it is not receiving new parser types or feature work. Its successor is Parsed Events, which decodes instructions through the IDL catalog and is in closed beta. You can also use getTransactionsForAddress for transaction history and backfill, and the Wallet API for human-readable wallet data.

Overview

The Parse Transactions endpoint transforms raw transaction signatures into structured, human-readable information. Instead of manually decoding instruction data and account lists, you receive clear details about transfers, swaps, NFT activities, and more.

Send a POST request to /v0/transactions with up to 100 signatures per call.

When to use this

• You have one or more transaction signatures and want pre-parsed, human-readable output.
• You are displaying a single transaction’s details to a user (wallets, explorers).
• You need event summaries (SOL/token transfers, NFT activity) without writing your own parser.

For new builds, getTransaction returns the raw transaction, and getTransactionsForAddress is the modern path for history.

Quickstart

1. Get your API key

   Sign up at dashboard.helius.dev and copy your API key.

2. POST signatures to /v0/transactions

   Pass an array of signatures in the transactions body field.

   JavaScript

   const parseTransaction = async () => {
     const url = "https://mainnet.helius-rpc.com/v0/transactions/?api-key=YOUR_API_KEY";
   
     const response = await fetch(url, {
       method: 'POST',
       headers: {
         'Content-Type': 'application/json',
       },
       body: JSON.stringify({
         transactions: ["5rfFLBUp5YPr6rC2g1KBBW8LGZBcZ8Lvs7gKAdgrBjmQvFf6EKkgc5cpAQUTwGxDJbNqtLYkjV5vS5zVK4tb6JtP"],
       }),
     });
   
     const data = await response.json();
     console.log("Parsed transaction:", data);
   };
   
   parseTransaction();
   

   Python

   import requests
   import json
   
   def parse_transaction():
       url = "https://mainnet.helius-rpc.com/v0/transactions/?api-key=YOUR_API_KEY"
   
       payload = {
           "transactions": ["5rfFLBUp5YPr6rC2g1KBBW8LGZBcZ8Lvs7gKAdgrBjmQvFf6EKkgc5cpAQUTwGxDJbNqtLYkjV5vS5zVK4tb6JtP"]
       }
   
       response = requests.post(url, json=payload)
       data = response.json()
       print("Parsed transaction:", data)
   
   parse_transaction()
   
3. Read the parsed response

   Each transaction comes back with a description, type, transfers, and event summaries. See Response below.

Request parameters

transactions · string[] · required

Array of transaction signatures to parse. Up to 100 signatures per request.

Response

Each parsed transaction includes a human-readable description alongside structured transfer and event data:

{
  "description": "Transfer 0.1 SOL to FXvStt8aeQHMGKDgqaQ2HXWfJsXnqiKSoBEpHJahkuD",
  "type": "TRANSFER",
  "source": "SYSTEM_PROGRAM",
  "fee": 5000,
  "feePayer": "M2mx93ekt1fmXSVkTrUL9xVFHkmME8HTUi5Cyc5aF7K",
  "signature": "5rfFLBUp5YPr6rC2g1KBBW8LGZBcZ8Lvs7gKAdgrBjmQvFf6EKkgc5cpAQUTwGxDJbNqtLYkjV5vS5zVK4tb6JtP",
  "slot": 171341028,
  "timestamp": 1674080473,
  "nativeTransfers": [
    {
      "fromUserAccount": "M2mx93ekt1fmXSVkTrUL9xVFHkmME8HTUi5Cyc5aF7K",
      "toUserAccount": "FXvStt8aeQHMGKDgqaQ2HXWfJsXnqiKSoBEpHJahkuD",
      "amount": 100000000
    }
  ],
  "events": {
    "sol": {
      "from": "M2mx93ekt1fmXSVkTrUL9xVFHkmME8HTUi5Cyc5aF7K",
      "to": "FXvStt8aeQHMGKDgqaQ2HXWfJsXnqiKSoBEpHJahkuD",
      "amount": 0.1
    }
  }
}

Each parsed transaction includes:

• description — human-readable summary of what happened.
• type — transaction category (TRANSFER, SWAP, NFT_SALE, and others).
• source — the program that executed the transaction.
• fee / feePayer — transaction fee in lamports and the account that paid it.
• nativeTransfers — SOL movements between accounts.
• tokenTransfers — SPL token movements.
• events — high-level event summaries.
• slot / timestamp — when the transaction was processed.

For the full field catalog and all supported transaction types, see the Parse Transactions API reference.

Next steps

Transaction History

Fetch human-readable transaction history for an address, with filtering and pagination.

getTransactionsForAddress

The modern, Helius-native replacement for transaction history and backfill.

Wallet API

REST endpoints for human-readable wallet data: balances, history, and transfers.

Getting Data overview

Compare every Helius option for querying Solana data.