Broadcast a signed swap transaction

Broadcast a signed swap transaction

post

Broadcast a signed swap transaction.

The caller is responsible for signing the transaction data returned by /api/v1/trade/quote.

• Solana: signed_transaction is a base64-encoded serialized VersionedTransaction

• EVM (Base): signed_transaction is a 0x-prefixed signed transaction hex

The signed transaction is broadcast as-is; the response reports the resulting transaction hash and status.

⚠️ This endpoint always broadcasts. There is no dry-run mode. Every call that passes validation submits the transaction to the network, and a successful transaction is a real executed trade that moves real funds. No request field prevents that.

The transaction is always simulated first, and the broadcast is aborted if that simulation fails — so a transaction that would revert does not reach the network. Simulation passing is not a preview: it is what allows the broadcast to proceed.

Authorizations

ApiKeyAuth

apikeystringRequired

API key for authentication

Body

application/json

signed_transactionstringRequired

Signed transaction: base64 for Solana, 0x hex for EVM

Example: 0xdeadbeef

chainstring · enumRequired

Chain the transaction is for: 'solana' or 'base'

Example: basePossible values:

request_idany ofOptional

Jupiter request ID (Solana only)

stringOptional

Responses

200

Execution result including transaction hash

application/json

400

Bad Request

application/json

401

Unauthorized

application/json

403

Forbidden

application/json

404

Not Found

application/json

422

Unprocessable Content

application/json

429

Too Many Requests

application/json

500

Internal Server Error

application/json

502

Bad Gateway

application/json

503

Service Unavailable

application/json

504

Gateway Timeout

application/json

post/api/v1/trade/execute

HTTPcURLJavaScriptPython

POST /api/v1/trade/execute HTTP/1.1
Host: api.nansen.ai
apikey: YOUR_API_KEY
Content-Type: application/json
Accept: */*
Content-Length: 70

{
  "signed_transaction": "0xdeadbeef",
  "chain": "base",
  "request_id": "text"
}

{
  "txHash": "text",
  "signature": "text",
  "status": "text",
  "ANY_ADDITIONAL_PROPERTY": "anything"
}