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This is the basic bundle path — a direct Jito proxy, billed per send, best when you need atomic execution without a latency requirement. If you’re a trader who needs low latency and the priority tip buffer, use Sender Max bundles instead.
Basic bundles give you atomic, all-or-nothing execution of up to 5 transactions, proxied directly to Jito. Each sendBundle submission is billed as 1 credit from your plan.

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Supported Methods

MethodDescriptionRate Limit
sendBundleSubmit a bundle5 RPS per project
simulateBundleSimulate a bundle without submittingGeneral RPC rate limit
Need higher rate limits? Contact our sales team.

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sendBundle

Submits a list of signed transactions as an atomic bundle. If the bundle is accepted, returns a bundle_id (SHA-256 hash of the transaction signatures). This does not guarantee the bundle will land on-chain. Check for transaction confirmation on chain to verify. A tip is required. At least one transaction must transfer SOL to a Helius tip account. If the tip is too low, the bundle may not be selected for inclusion.

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Request

ParameterTypeDescription
params[0]array[string]Required. Up to 5 fully-signed transactions, base64 encoded.
params[1].encodingstringOptional. base64 (recommended) or base58. Default: base58.

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Example

curl "https://mainnet.helius-rpc.com/?api-key=YOUR_API_KEY" \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "sendBundle",
    "params": [
      [
        "AT2AqtlokikUWgGNnSX5xrmdvBjSaiIPxvFz6zc5Abn5Z0CPFW5GO+Y3rXceLnqLgQFnGw0yTk3NtJdFNsbrwwQBAAIEsXPDJ9cMVbpFQYClVM7PGLh8JOfCD6E2vz5VNmBCF+p4Uhyxec67hYm1VqLV7JTSSYaC/fm7KvWtZOSRzEFT2gAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABUpTWpkpIQZNJOhxYNo4fHw1td28kruB5B+oQEEFRI1i3Wzl2VfewCI8oYXParnP78725sKFzYheTEn8v865YQIDABhqaXRvIGJ1bmRsZSAwOiBqaXRvIHRlc3QCAgABDAIAAACghgEAAAAAAA==",
        "AS6fOZuGDsmyYdd+RC0fiFUgNe1BYTOYT+1hkRXHAeroC8R60h3g34EPF5Ys8sGzVBMP9MDSTVgy1/SSTqpCtA4BAAIEsXPDJ9cMVbpFQYClVM7PGLh8JOfCD6E2vz5VNmBCF+p4Uhyxec67hYm1VqLV7JTSSYaC/fm7KvWtZOSRzEFT2gAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABUpTWpkpIQZNJOhxYNo4fHw1td28kruB5B+oQEEFRI1i3Wzl2VfewCI8oYXParnP78725sKFzYheTEn8v865YQIDABhqaXRvIGJ1bmRsZSAxOiBqaXRvIHRlc3QCAgABDAIAAACghgEAAAAAAA=="
      ],
      {
        "encoding": "base64"
      }
    ]
  }'

​
Response

{
  "jsonrpc": "2.0",
  "result": "892b79ed49138bfb3aa5441f0df6e06ef34f9ee8f3976c15b323605bae0cf51d",
  "id": 1
}
The result is the bundle ID — use it with getBundleStatuses to track landing.

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getBundleStatuses

Returns the status of submitted bundles. If a bundle has not landed or is not found, it returns null.

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Request

ParameterTypeDescription
params[0]array[string]Required. Up to 5 bundle IDs.

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Example

curl "https://mainnet.helius-rpc.com/?api-key=YOUR_API_KEY" \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getBundleStatuses",
    "params": [
      [
        "892b79ed49138bfb3aa5441f0df6e06ef34f9ee8f3976c15b323605bae0cf51d"
      ]
    ]
  }'

​
Response

{
  "jsonrpc": "2.0",
  "result": {
    "context": {
      "slot": 242806119
    },
    "value": [
      {
        "bundle_id": "892b79ed49138bfb3aa5441f0df6e06ef34f9ee8f3976c15b323605bae0cf51d",
        "transactions": [
          "3bC2M9fiACSjkTXZDgeNAuQ4ScTsdKGwR42ytFdhUvikqTmBheUxfsR1fDVsM5ADCMMspuwGkdm1uKbU246x5aE3",
          "8t9hKYEYNbLvNqiSzP96S13XF1C2f1ro271Kdf7bkZ6EpjPLuDff1ywRy4gfaGSTubsM2FeYGDoT64ZwPm1cQUt"
        ],
        "slot": 242804011,
        "confirmation_status": "finalized",
        "err": {
          "Ok": null
        }
      }
    ]
  },
  "id": 1
}
Returns null in the value array for bundles not found.

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Region Routing

By default, Helius routes your bundle to Jito’s global endpoint (mainnet.block-engine.jito.wtf), which geo-routes to the nearest Block Engine automatically. To target a specific region, set the jito-region HTTP header:
Header ValueBlock Engine Region
amsAmsterdam
dubDublin
fraFrankfurt
lonLondon
nycNew York
slcSalt Lake City
sgpSingapore
tyoTokyo
mainnetGlobal (geo-routed)

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Example with Region

curl "https://mainnet.helius-rpc.com/?api-key=YOUR_API_KEY" \
  -X POST \
  -H "Content-Type: application/json" \
  -H "jito-region: nyc" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "sendBundle",
    "params": [
      [
        "AT2AqtlokikUWgGNnSX5xrmdvBjSaiIPxvFz6zc5Abn5Z0CPFW5GO+Y3rXceLnqLgQFnGw0yTk3NtJdFNsbrwwQBAAIEsXPDJ9cMVbpFQYClVM7PGLh8JOfCD6E2vz5VNmBCF+p4Uhyxec67hYm1VqLV7JTSSYaC/fm7KvWtZOSRzEFT2gAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABUpTWpkpIQZNJOhxYNo4fHw1td28kruB5B+oQEEFRI1i3Wzl2VfewCI8oYXParnP78725sKFzYheTEn8v865YQIDABhqaXRvIGJ1bmRsZSAwOiBqaXRvIHRlc3QCAgABDAIAAACghgEAAAAAAA==",
        "AS6fOZuGDsmyYdd+RC0fiFUgNe1BYTOYT+1hkRXHAeroC8R60h3g34EPF5Ys8sGzVBMP9MDSTVgy1/SSTqpCtA4BAAIEsXPDJ9cMVbpFQYClVM7PGLh8JOfCD6E2vz5VNmBCF+p4Uhyxec67hYm1VqLV7JTSSYaC/fm7KvWtZOSRzEFT2gAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABUpTWpkpIQZNJOhxYNo4fHw1td28kruB5B+oQEEFRI1i3Wzl2VfewCI8oYXParnP78725sKFzYheTEn8v865YQIDABhqaXRvIGJ1bmRsZSAxOiBqaXRvIHRlc3QCAgABDAIAAACghgEAAAAAAA=="
      ],
      {
        "encoding": "base64"
      }
    ]
  }'

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Tip Accounts

At least one transaction in your bundle must include a SOL transfer to one of these tip accounts. Pick one at random to reduce contention. 
4ACfpUFoaSD9bfPdeu6DBt89gB6ENTeHBXCAi87NhDEE
D2L6yPZ2FmmmTKPgzaMKdhu6EWZcTpLy1Vhx8uvZe7NZ
9bnz4RShgq1hAnLnZbP8kbgBg1kEmcJBYQq3gQbmnSta
5VY91ws6B2hMmBFRsXkoAAdsPHBJwRfBht4DXox3xkwn
2nyhqdwKcJZR2vcqCyrYsaPVdAnFoJjiksCXJ7hfEYgD
2q5pghRs6arqVjRvT5gfgWfWcHWmw1ZuCzphgd5KfWGJ
wyvPkWjVZz1M8fHQnMMCDTQDbkManefNNhweYk5WkcF
3KCKozbAaF75qEU33jtzozcJ29yJuaLJTy2jFdzUY8bT
4vieeGHPYPG2MmyPRcYjdiDmmhN3ww7hsFNap8pVN3Ey
4TQLFNWK8AovT1gFvda5jfw2oJeRMKEmw7aH6MGBJ3or
Minimum tip is 5,000 lamports.

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Bundle Requirements

  • Max 5 transactions per bundle
  • All transactions must be fully signed
  • Use base64 encoding (recommended over base58 for performance)
  • At least one transaction must include a tip
  • Transactions execute sequentially — tx2 can depend on state changes from tx1

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simulateBundle (Optional)

You can optionally simulate your bundle before submitting to check for errors: 
curl "https://mainnet.helius-rpc.com/?api-key=YOUR_API_KEY" \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "simulateBundle",
    "params": [
      {
        "encodedTransactions": [
          "AT2AqtlokikUWgGNnSX5xrmdvBjSaiIPxvFz6zc5Abn5Z0CPFW5GO+Y3rXceLnqLgQFnGw0yTk3NtJdFNsbrwwQBAAIEsXPDJ9cMVbpFQYClVM7PGLh8JOfCD6E2vz5VNmBCF+p4Uhyxec67hYm1VqLV7JTSSYaC/fm7KvWtZOSRzEFT2gAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABUpTWpkpIQZNJOhxYNo4fHw1td28kruB5B+oQEEFRI1i3Wzl2VfewCI8oYXParnP78725sKFzYheTEn8v865YQIDABhqaXRvIGJ1bmRsZSAwOiBqaXRvIHRlc3QCAgABDAIAAACghgEAAAAAAA==",
          "AS6fOZuGDsmyYdd+RC0fiFUgNe1BYTOYT+1hkRXHAeroC8R60h3g34EPF5Ys8sGzVBMP9MDSTVgy1/SSTqpCtA4BAAIEsXPDJ9cMVbpFQYClVM7PGLh8JOfCD6E2vz5VNmBCF+p4Uhyxec67hYm1VqLV7JTSSYaC/fm7KvWtZOSRzEFT2gAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABUpTWpkpIQZNJOhxYNo4fHw1td28kruB5B+oQEEFRI1i3Wzl2VfewCI8oYXParnP78725sKFzYheTEn8v865YQIDABhqaXRvIGJ1bmRsZSAxOiBqaXRvIHRlc3QCAgABDAIAAACghgEAAAAAAA=="
        ]
      }
    ]
  }'

​
See also

Transaction Rebates

Opt in on single sendTransaction calls to earn a share of the MEV your transactions create, paid in SOL.