API Reference

Send Transaction

Submit a signed transaction for fast delivery to the Solana network.

POST/v1/send

Request

Headers

Headers	Value	Required
Authorization	Bearer YOUR_API_KEY	Required
Content-Type	application/json	Required

Body Parameters

Field	Type	Description
transaction	string	Base64-encoded signed transaction
options	object?	Optional send configuration
options.skip_preflight	boolean?	Skip preflight simulation (default: true)
options.max_retries	number?	Max delivery retries (default: 3)
options.anti_mev	boolean?	Enable enhanced Anti-MEV routing (default: true)

Example Request

cURL

curl -X POST https://bolttx.io/v1/send \
  -H "Authorization: Bearer btx_live_abc123" \
  -H "Content-Type: application/json" \
  -d '{
    "transaction": "AQAAAAAAAAAAAAAAAAAAAAA...",
    "options": {
      "skip_preflight": true,
      "max_retries": 3,
      "anti_mev": true
    }
  }'

Response

Success (200)

{
  "success": true,
  "signature": "5xKnR8qXe...",
  "slot": 234567890
}

Error Codes

Code	Message	Description
400	Invalid transaction	Malformed or unsigned transaction
401	Unauthorized	Missing or invalid API key
402	Tip required / insufficient	Transaction has no tip transfer to a BoltTx address, or the tip amount is below your plan's minimum
429	Rate limit exceeded	TPS limit reached for your plan; the cap is per-user (shared across all your API keys)
500	Delivery failed	Transaction could not be delivered after retries

Authentication Batch Send