Create an invoice

POSThttps://rebaar.in/api/v1/invoices/createView as Markdown

All amounts are integers in paise (rupees × 100). The invoice is stored with its lines and the CGST + SGST or IGST split, so it can take an e-invoice IRN and credit notes. Send either `items` — the totals are computed for you, and a `subtotal`, `taxAmount` or `total` sent with them that differs is 400 `totals_mismatch` — or header totals only: then `subtotal` and `total` are required, `taxAmount` must be the GST of ONE rate (0, 1, 5, 12, 18 or 40 %) on `subtotal`, otherwise 400 `tax_not_one_rate` (send `items` for an invoice with several rates), and `total` must equal `subtotal + taxAmount` within 50 paise of rounding to the rupee (kept as the round-off), otherwise 400 `totals_mismatch`. Your `number` is kept as sent; one already used is 409 `invoice_number_exists`. A company with no GSTIN in Settings cannot charge GST (422 `gst_needs_gstin`). Optional `shipTo` when the goods go somewhere other than the client's address (e.g. a site): the e-invoice and e-way bill name it as the ship-to.

Headers

Header	Value
Authorizationrequired	`Bearer ck_live_…` — your API key from Settings → API keys
Content-Typerequired	`application/json`

Request body

Field	Type	Description
numberrequired	string	at most 50 characters
clientId	string	A client of your company.
projectId	string	A project of your company.
placeOfSupply	string	2-digit GST state code. Left out: the project site's state, else the client's.pattern ^[0-9]{2}$
items	array of object	The invoice lines. Left out: the header totals become one line.at least 1 itemsat most 500 items
items[].descriptionrequired	string
items[].hsnSac	string
items[].quantityrequired	number	Up to 3 decimals; a 4th is 400.minimum 0
items[].unit	string
items[].ratePaiserequired	integer	Rate per unit in PAISE (rupees × 100). ₹1,500.00 = 150000.
items[].gstRaterequired	integer	GST %.one of 0, 1, 5, 12, 18, 40
items[].cessRate	number	minimum 0
subtotal	integer	Pre-tax subtotal (required without items) in PAISE (rupees × 100). ₹1,500.00 = 150000.
taxAmount	integer	GST amount in PAISE (rupees × 100). ₹1,500.00 = 150000.default 0
total	integer	Grand total (required without items) in PAISE (rupees × 100). ₹1,500.00 = 150000.
status	string	one of "Draft", "Sent"default "Draft"
issueDate	string (date)	Issue date as an ISO YYYY-MM-DD string. Left out: today (IST).
dueDate	string (date)	Due date as an ISO YYYY-MM-DD string.
shipTo	object or null	Where the goods go, when not to the client. Omit (or null) to deliver to the client.
shipTo.addressrequired	string	Delivery address. No double quotes.at least 3 charactersat most 100 characters
shipTo.placerequired	string	Delivery city or place. No double quotes.at least 3 charactersat most 50 characters
shipTo.pincoderequired	string	6 digits, not starting with 0.pattern ^[1-9][0-9]{5}$
shipTo.stateCode	string or null	2-digit GST state code. Left out: worked out from the PIN; a state the PIN is not in is 400.pattern ^[0-9]{2}$

Try it

This call changes data. Send runs it in your API sandbox — a practice company with sample data — with a sandbox key, never in your real company. To change real data, run the sample from your own machine with a live key. About the sandbox

Request body (JSON)

curl -X POST 'https://rebaar.in/api/v1/invoices/create' \
  -H 'Authorization: Bearer ck_live_xxxxxxxx_…' \
  -H 'Content-Type: application/json' \
  -d '{
  "number": "INV-2026-0042",
  "clientId": "7d3f1c2a-5b8e-4f0a-9c61-2e4b7a9d0c13",
  "projectId": "casa-verde",
  "status": "Draft",
  "issueDate": "2026-10-01",
  "dueDate": "2026-10-31",
  "items": [
    {
      "description": "RCC work, first floor slab",
      "hsnSac": "995411",
      "quantity": 1,
      "unit": "lot",
      "ratePaise": 10000000,
      "gstRate": 18
    }
  ],
  "shipTo": {
    "address": "14, 2nd Cross, JP Nagar 7th Phase",
    "place": "Bengaluru",
    "pincode": "560076"
  }
}'

Sandbox key

Only sandbox keys (ck_test_…) — make one in Settings → API keys. It reaches your practice company, never your real data. 30 calls a minute.

Responses

201Created. The new invoice's id and your number.

{
  "id": "f1a8c3d5-2e6b-4c9f-a017-3b5d8e2c4f96",
  "number": "INV-2026-0042"
}

400Validation failed, or the totals do not add up.

totals_mismatch

{
  "error": "totals_mismatch",
  "field": "total",
  "message": "The totals sent do not match the items: subtotal 10000000, taxAmount 1800000, total 11800000. Omit them to use the computed figures."
}

tax_not_one_rate

{
  "error": "tax_not_one_rate",
  "field": "taxAmount",
  "message": "taxAmount is not the GST of one rate (0, 1, 5, 12, 18, 40 %) on the subtotal. Send the invoice as line items, each with its own GST rate."
}

validation

{
  "error": "subtotal is required when items is not sent"
}

401No `Authorization: Bearer …` header was sent. Or: The key is unknown, revoked or expired — or the company cannot use it.

unauthenticated — No `Authorization: Bearer …` header was sent.

{
  "error": "unauthenticated",
  "message": "Authorization: Bearer <api_key> required"
}

invalid_token — The key is unknown, revoked or expired — or the company cannot use it.

{
  "error": "invalid_token",
  "message": "API key not recognised, revoked, or expired"
}

402With a sandbox key: the practice company already holds 10,000 invoices (`sandbox_limit`) — reset the sandbox in Settings → API keys. Or the plan / subscription does not allow the API.

sandbox_limit

{
  "error": "sandbox_limit",
  "message": "The sandbox holds at most 10,000 invoices. Reset the sandbox in Settings → API keys.",
  "resource": "invoices",
  "used": 10000,
  "limit": 10000
}

plan_required

{
  "error": "plan_required",
  "message": "API access requires the Scale plan. This workspace is on Growth.",
  "currentPlan": "growth",
  "requiredPlan": "scale"
}

access_expired

{
  "error": "access_expired",
  "reason": "payment_failed",
  "message": "Workspace does not currently have an active Scale subscription."
}

403The request came from an IP address that is not on the key's allowlist. Or: The key does not carry the scope this method needs: `read` for GET, `write` for POST, PATCH and DELETE.

ip_not_allowed — The request came from an IP address that is not on the key's allowlist.

{
  "error": "ip_not_allowed",
  "message": "Source IP 203.0.113.7 is not on the key's allowlist."
}

insufficient_scope — The key does not carry the scope this method needs: `read` for GET, `write` for POST, PATCH and DELETE.

{
  "error": "insufficient_scope",
  "message": "This API key does not have the 'write' scope.",
  "required": "write",
  "granted": [
    "read"
  ]
}

404`clientId` or `projectId` is not one of your company's.

client_not_found

{
  "error": "client_not_found"
}

project_not_found

{
  "error": "project_not_found"
}

409That invoice number is already used in your company.

{
  "error": "invoice_number_exists"
}

422Your company has no GSTIN, so the invoice cannot charge GST. `code` is `gst_needs_gstin`; `field` names the line.

{
  "error": "Your company has no GSTIN in Settings → Company, so this bill cannot charge GST. Set GST to 0 %, or add your GSTIN first.",
  "code": "gst_needs_gstin",
  "field": "items.0.gstRate"
}

429More than 120 requests in a minute with this key (30 with a sandbox key).

rate_limited — More than 120 requests in a minute with this key (30 with a sandbox key).

{
  "error": "Too many requests. Please try again later."
}

500Something failed on our side.

internal — Something failed on our side.

{
  "error": "internal"
}

Errors

Errors every call can return

Status	Code	Meaning	What to do
401	unauthenticated	No `Authorization: Bearer …` header was sent.	Send your API key as `Authorization: Bearer ck_live_…` on every request.
401	invalid_token	The key is unknown, revoked or expired — or the company cannot use it.	Check you copied the whole key. Make a new one in Settings → API keys if it was revoked or has expired.
403	ip_not_allowed	The request came from an IP address that is not on the key's allowlist.	Call from an allowed address, or change the key's IP allowlist in Settings → API keys.
402	plan_required	The company is not on the Scale plan, which includes the API.	The Owner moves the company to Scale in Settings → Billing.
402	access_expired	The subscription is not active (trial over, payment failed, cancelled, paused, locked or closing). `reason` says which.	The Owner pays or renews in Settings → Billing; calls work again at once.
429	—	More than 120 requests in a minute with this key (30 with a sandbox key).	Wait the number of seconds in the `Retry-After` header. Every reply carries `RateLimit-Remaining`, so you can slow down before this happens.
403	insufficient_scope	The key does not carry the scope this method needs: `read` for GET, `write` for POST, PATCH and DELETE.	Make a key with the scope you need in Settings → API keys.
500	internal	Something failed on our side.	Retry with exponential backoff. If it keeps happening, email [email protected] with the time of the call.