Update Vehicle Number

post

https://api.in.onefinops.com/v1/ewaybills/partb

Update Part-B (vehicle / transport leg) on an existing EWB. NIC permits unlimited Part-B updates while the EWB is active. The EWB to update is supplied in the request body as ewbNumber (not in the URL).
Note: NIC's VEHEWB response does not echo ewbNumber — only vehicleUpdateDate + validUpto.

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Body Params

ewbNumber

int64

required

12-digit EWB number to update Part-B on.

vehicleNumber

string

required

vehicleType

string | null

enum

Vehicle type. Optional.

R — Regular
O — Over-Dimensional Cargo (ODC)

Allowed:

transportMode

integer

enum

required

NIC transport mode. Required.

1 — Road
2 — Rail
3 — Air
4 — Ship

Allowed:

transportDocumentNumber

string | null

Required when transportMode is 2 (Rail), 3 (Air), or 4 (Ship).

transportDocumentDate

date | null

Required when transportMode is 2 (Rail), 3 (Air), or 4 (Ship).

fromPlace

string

required

fromStateCode

integer

required

reasonCode

integer

enum

required

Reason for updating Part-B. Required.

1 — Break Down (vehicle breakdown mid-route)
2 — Transhipment (vehicle change at a hub)
3 — Others (free-text remark required)
4 — First Time (initial Part-B fill after Part-A-only generation)

Allowed:

reasonRemark

string | null

Headers

gstin

string

required

length between 15 and 15

^[0-9]{2}[A-Z]{5}[0-9]{4}[A-Z][A-Z0-9]{3}$

GSTIN whose NIC IRP / EWB-portal credential authorizes the call.
Seed each GSTIN's credential through the Developer Console.

X-Request-Id

uuid

Optional client-supplied UUID for correlation across logs and dashboards. If omitted, OneFinOps mints one and echoes it back on the response.

Response

200Updated EWB record.