Reverse a cost on the order

POST /pos/{poId}/costs/{costId}/reverse

Reverse a cost on the order (404 CostNotFound): it stays, marked reversed, and the ledger posts its opposite (a capitalised one lowers the layers it lifted).

Appends purchasing.cost-reversed. Idempotent by state: a cost is reversed once, so a retry is acknowledged and appends nothing.

Access

Requires financials:write.

How scopes come from roles: Scopes and roles. Getting a token: Authentication and app tokens.

Retries

Idempotent by state: a cost is reversed once, so a retry is acknowledged and appends nothing.

Why every write carries a key: Idempotency and retries.

Facts appended

purchasing.cost-reversed

What a fact is: Facts and the journal.

AI agent tool

Agents call this as purchasing_reverse_po_cost (Purchasing: Reverse PO cost), in the costs toolset.

Connecting an agent: AI agents.

Example

From Journal an additional cost on an order, step 16: Reverse it.

curl

curl -X POST 'https://purchasing.getmanifold.io/pos/po_01a15ad0-c2b1-7c3d-8e4f-5a6b7c8d9e0f/costs/cost_01a15ad0-f0d1-7662-82e0-1b2c3d4e5f60/reverse' \
  -H "Authorization: Bearer $MANIFOLD_TOKEN" \
  -H 'Content-Type: application/json' \
  -d '{
  "reason": "Billed to the supplier instead"
}'

JavaScript (fetch)

const response = await fetch("https://purchasing.getmanifold.io/pos/po_01a15ad0-c2b1-7c3d-8e4f-5a6b7c8d9e0f/costs/cost_01a15ad0-f0d1-7662-82e0-1b2c3d4e5f60/reverse", {
  method: "POST",
  headers: { Authorization: `Bearer ${process.env.MANIFOLD_TOKEN}`, "Content-Type": "application/json" },
  body: JSON.stringify({
    "reason": "Billed to the supplier instead"
  }),
});
if (!response.ok) throw new Error(`${response.status}: ${await response.text()}`);
const answer = await response.json();

Request body · application/json

{
  "reason": "Billed to the supplier instead"
}

Response · 200 · application/json

{
  "id": "po_01a15ad0-c2b1-7c3d-8e4f-5a6b7c8d9e0f",
  "number": "PO-00001",
  "serial": 1,
  "reference": "PO-POTTERY-0918",
  "supplier": "Kiln Street Pottery",
  "currency": "AUD",
  "status": "authorised",
  "authorisedOn": "2026-10-21",
  "lines": [
    {
      "sku": "MUG-SPECKLED",
      "ordered": 40,
      "received": 0,
      "cancelled": 0,
      "unitCostCents": 950
    }
  ],
  "receipts": [],
  "issues": [],
  "shipments": [],
  "landedCosts": [],
  "costs": [
    {
      "costId": "cost_01a15ad0-f0d1-7662-82e0-1b2c3d4e5f60",
      "amountCents": 3500,
      "currency": "AUD",
      "fx": {
        "currency": "AUD",
        "home": "AUD",
        "rate": 1,
        "rateDate": "2026-10-21",
        "source": "same"
      },
      "reason": "Customs broker's clearance fee",
      "accountCode": "6300",
      "date": "2026-10-21",
      "recordedBy": {
        "_tag": "user",
        "id": "usr_01a15ad0-a1b2-7c3d-8e4f-5a6b7c8d9e01"
      },
      "recordedAt": "2026-10-21T01:10:39.501Z",
      "reversal": {
        "by": {
          "_tag": "user",
          "id": "usr_01a15ad0-a1b2-7c3d-8e4f-5a6b7c8d9e01"
        },
        "at": "2026-10-21T01:10:40.464Z",
        "reason": "Billed to the supplier instead"
      },
      "capitalised": false,
      "lines": []
    }
  ],
  "payables": [],
  "payments": [],
  "revision": 0,
  "createdAt": "2026-10-21T01:10:37.821Z",
  "updatedAt": "2026-10-21T01:10:40.464Z"
}

The panel writes this call in other languages. It does not send it: Manifold's APIs do not take calls from a web page on another site, so run the call from your own code or terminal. The whole API as OpenAPI: purchasing-manager.openapi.json. Base URL https://purchasing.getmanifold.io.

Errors

Every refusal is a status and a JSON body whose _tag names it. A refused call changes nothing.

`401`

Refusal	What it means	What to do
`Unauthorized` reason	The token is missing, expired or not one Manifold issued.	Get a fresh token and send the call again.
`TokenAlreadyUsed` tokenId	A single-use app token was already spent.	Mint a new token for this call.

`402`

Refusal	What it means	What to do
`SubscriptionRequired` status	The organization's subscription has lapsed, so writes are refused.	An owner settles billing. Reads still work meanwhile.

`403`

Refusal	What it means	What to do
`TenantRequired` userId	The token names no organization.	Choose the organization, then get a new token.
`ScopeRequired` required	The token's roles do not grant the scope this call needs.	Ask an owner or admin for a role that grants it.

`404`

Refusal	What it means	What to do
`PoNotFound` poId	No such record in this organization.	Check the id in the path or the body.
`CostNotFound` costId	No such record in this organization.	Check the id in the path or the body.

`409`

Refusal	What it means	What to do
`MirroredFromSource` source	This area is fed by your source system until the organization goes live.	Make the change in the source system, or go live first.

`502`

Refusal	What it means	What to do
`InventoryUnavailable` reason	The inventory service did not answer, so nothing changed.	Send the same request again shortly.

`503`

Refusal	What it means	What to do
`RequestLogUnavailable` tokenId, reason	The service could not record the request, so it did nothing.	Send the same request again shortly.

How refusals work everywhere: Errors.

Used in

Journal an additional cost on an order, step 16: Reverse it
Journal an additional cost on an order, step 17: Reverse it again