Sign invoice

POST /<provider>/sign-contract

API used to sign an invoice and send it to the Tax Authority.

Headers

Name	Required	Description
Authorization	✅	Bearer access_token
Content-Type	✅	application/json
X-Tax-Code	✅	Seller's tax code.

Body Parameters

Name	Required	Description
id	✅	Invoice sid (returned in each element of the invoice list).
inv.stax	✅	Seller's tax code.
inv.start_date	✅	Invoice issue date.
inv.end_date	✅	Invoice issue date.

Curl 1Invoice

curl --location 'https://stag-invoice-hub.1invoice.vn/1Invoice/sign-contract' \
--header 'authorization: Bearer O87316arj5+Od3Fqyy5hzdBfIuPk73eKqpAzBSvv8sY=' \
--header 'x-tax-code: 0106026495-998' \
--header 'Content-Type: application/json' \
--data '{
    "id": "3a1baffc-e577-a496-8a02-35145559c213",
    "inv": {
        "stax": "0106026495-998",
        "start_date": "2025-08-12",
        "end_date": "2025-08-12"
    }
}'

Curl one-invoice

curl --location 'https://stag-invoice-hub.1invoice.vn/one-invoice/sign-contract' \
--header 'accept: application/json, text/plain, */*' \
--header 'authorization: Bearer O87316arj5+Od3Fqyy5hzdBfIuPk73eKqpAzBSvv8sY='

Curl FPT

curl --location 'https://stag-invoice-hub.1invoice.vn/fpt/sign-contract' \
--header 'authorization: Bearer <token>'