Broadcast - VelumX

curl --request POST \ --url https://api.velumx.xyz/api/v1/broadcast \ --header 'Content-Type: application/json' \ --header 'x-api-key: <api-key>' \ --data ' { "txHex": "<string>", "feeAmount": "<string>", "userId": "<string>" } '

Authorizations

x-api-key

string

header

required

Body

application/json

txHex

string

required

Signed sponsored transaction hex (from stx_signTransaction with broadcast: false). The transaction version byte determines the target network automatically.

feeAmount

string

Fee in token micro-units. Required for USER_PAYS — must match the fee-amount arg encoded in the transaction. Omit for DEVELOPER_SPONSORS.

userId

string

Optional user identifier for per-user spend tracking and limits.

Response

Broadcast result

txid

string

Stacks transaction ID

status

string

Always sponsored on success