A shipping app connects the account it books with

PUT /carrier-accounts/{carrierAccountId}

A shipping app connects the account it books with, or describes it again: its id and name at the provider, its settings page and the quoteUrl it answers live rates at (https on a public host — 400 UnsafeQuoteUrl otherwise — or, for a first-party app, the platform's own).

The app is read from its own token (403 NotACarrierApp for a person; 403 CarrierAccountNotYours for an account another app keeps). Appends fulfillment.carrier-account-connected (also for one let go before) or fulfillment.carrier-account-updated. Idempotent by content: the account as it already stands appends nothing.

Access

Requires shipping:write.

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

Retries

Idempotent by content: the account as it already stands appends nothing.

Why every write carries a key: Idempotency and retries.

Facts appended

fulfillment.carrier-account-connected
fulfillment.carrier-account-updated

What a fact is: Facts and the journal.

AI agent tool

No agent tool. only a shipping app keeps a carrier account, under its own token — it connects one from its own setup page

Connecting an agent: AI agents.

Example

curl

curl -X PUT 'https://fulfillment.getmanifold.io/carrier-accounts/car_01a0f6b3-2d00-7a91-9b13-e8f90a1b2c3d' \
  -H "Authorization: Bearer $MANIFOLD_TOKEN" \
  -H 'Content-Type: application/json' \
  -d '{
  "externalId": "ssi-48213",
  "name": "Starshipit · Saltbush Homewares",
  "settingsPath": "/settings/shipping/starshipit",
  "quoteUrl": "https://starshipit.getmanifold.io/quotes"
}'

JavaScript (fetch)

const response = await fetch("https://fulfillment.getmanifold.io/carrier-accounts/car_01a0f6b3-2d00-7a91-9b13-e8f90a1b2c3d", {
  method: "PUT",
  headers: { Authorization: `Bearer ${process.env.MANIFOLD_TOKEN}`, "Content-Type": "application/json" },
  body: JSON.stringify({
    "externalId": "ssi-48213",
    "name": "Starshipit · Saltbush Homewares",
    "settingsPath": "/settings/shipping/starshipit",
    "quoteUrl": "https://starshipit.getmanifold.io/quotes"
  }),
});
if (!response.ok) throw new Error(`${response.status}: ${await response.text()}`);
const answer = await response.json();

Request body · application/json

{
  "externalId": "ssi-48213",
  "name": "Starshipit · Saltbush Homewares",
  "settingsPath": "/settings/shipping/starshipit",
  "quoteUrl": "https://starshipit.getmanifold.io/quotes"
}

Response · 200 · application/json

{
  "id": "car_01a0f6b3-2d00-7a91-9b13-e8f90a1b2c3d",
  "appId": "app_cc0cd668-9d5b-45cc-ac5a-b96892231a0e",
  "externalId": "ssi-48213",
  "name": "Starshipit · Saltbush Homewares",
  "settingsPath": "/settings/shipping/starshipit",
  "quoteUrl": "https://starshipit.getmanifold.io/quotes",
  "status": "connected",
  "connectedAt": "2026-10-14T22:51:30.118Z",
  "updatedAt": "2026-10-14T22:51:30.118Z"
}

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: fulfillment-manager.openapi.json. Base URL https://fulfillment.getmanifold.io.

Errors

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

`400`

Refusal	What it means	What to do
`UnsafeQuoteUrl` url, reason	The address is not a public HTTPS URL.	Use a public HTTPS URL.

`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
`NotACarrierApp` reason	Only a carrier app may call this.	Call it with the carrier app's token.
`CarrierAccountNotYours` carrierAccountId	This carrier account belongs to another app.	Call it with the app that keeps the account.
`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.

`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.

`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.