Send Transaction

Submit any signed Solana transaction via Jito bundle submission + RPC simultaneously. No quote required, no fee injection — just fast, reliable submission.

Requires API key.

Similar to Jito's sendTransaction and Helius's sendTransaction, but submits to all 5 Jito block engines + Triton RPC simultaneously for maximum landing probability.

POST /v1/send

Request:

{
  "transaction": "AQAAAA...base64-encoded-signed-transaction...=="
}

Response (success):

{
  "signature": "5Kx9abc...3nF",
  "status": "submitted",
  "jito": true,
  "rpc": true
}

Response (unsigned):

{
  "error": "Transaction is not signed"
}

Fields:

Field	Description
signature	Transaction signature (base58)
status	Always "submitted" — does not wait for confirmation
jito	Whether Jito submission succeeded (at least one of 5 endpoints)
rpc	Whether RPC submission succeeded

vs /v1/swap

	/v1/swap	/v1/send
Requires quoteId	Yes	No
Fee verification	Yes	No
Accepts any TX	No (must match quote)	Yes
Jito submission	Jito only	Jito + RPC
Use case	Venum-built swap TXs	Any transaction

Use Cases

• Bot builders: Build your own transactions, use Venum for reliable Jito submission
• CEX-DEX arb: Build swap via /v1/swap/build, sign locally, submit via /v1/send
• Custom TXs: Multi-instruction transactions, CPI calls, anything that needs frontrun protection

Example

// Build a swap
const { transaction } = await fetch('https://api.venum.dev/v1/swap/build', {
  method: 'POST',
  headers: { 'X-API-Key': key, 'Content-Type': 'application/json' },
  body: JSON.stringify({ inputMint, outputMint, amount, slippageBps: 50, userPublicKey }),
}).then(r => r.json());

// Sign locally
const tx = VersionedTransaction.deserialize(Buffer.from(transaction, 'base64'));
tx.sign([wallet]);

// Submit via Venum (Jito + RPC)
const result = await fetch('https://api.venum.dev/v1/send', {
  method: 'POST',
  headers: { 'X-API-Key': key, 'Content-Type': 'application/json' },
  body: JSON.stringify({ transaction: Buffer.from(tx.serialize()).toString('base64') }),
}).then(r => r.json());

console.log(result.signature); // Track on-chain

Rate Limits

Tier	Limit
External API key	10 req/min
Internal API key	Unlimited