Zoho Invoice

Invoicing: customers, invoices, estimates and payments

Website
zoho.com
Connects by
Signing in with Zoho
Category
Accounting
Part of
Zoho
Tools
Pass-through only
ServiceKey
Zoho Invoicezoho-invoice

Connecting

Your client presses Connect on their link and approves on Zoho's own screen. Operate As never sees their password.

Check they're connected
curl https://api.operate.as/v1/me/clients \  -H "Authorization: Bearer $OPERATE_AS_API_KEY"
Response
[  {    "id": "6f1c2a7e-...",    "name": "Miller Dental",    "services": [      "zoho-invoice"    ]  }]

Permissions

What the client readsPermission it asks for
See and change your invoices, estimates, customers and paymentsZohoInvoice.fullaccess.all

Pass-through

Zoho Invoice has no ready-made tools yet. Call any endpoint of its API through Operate As instead, with the client's access attached.

Add the client

In Clients, add your client and select Zoho Invoice. Then send them their link.

Your client connects

They sign in with Zoho and approve.

Find the endpoint

Pick the call from Zoho's own API docs. Your path is everything after https://www.zohoapis.com/invoice/v3.

Send it through Operate As

Use the client's ID, the service key zoho-invoice and that path. Your Operate As key goes in Authorization; the client's access is added for you.

See Pass-through requests for the full request and response format.

Call any endpoint
curl "https://api.operate.as/v1/clients/6f1c2a7e-.../zoho-invoice/organizations" \  -H "Authorization: Bearer $OPERATE_AS_API_KEY"
Response
{  "status": 200,  "data": {    "…": "the service's own response"  },  "encoding": "json"}

When access ends

Operate As renews the sign-in before it runs out and checks it daily. If Zoho refuses to renew it, the service shows Expired, you're alerted, and your client reconnects from the same link.

See Keeping access alive and Removing access.

Calls answer
HTTP/1.1 409 ConflictContent-Type: application/json{  "detail": "Miller Dental's Zoho access ended. Send them their link to reconnect."}
Your webhook receives
{  "id": "evt_3f9a1c…",  "type": "connection.expired",  "createdAt": "2026-10-16T08:00:00+00:00",  "data": {    "clientId": "6f1c2a7e-...",    "clientName": "Miller Dental",    "provider": "zoho",    "services": [      "zoho-invoice"    ],    "reconnectUrl": "https://…"  }}