OnLink
API reference

Lock a USDT/KES rate

Returns a single-use, time-limited quote. Quotes are only issued off a live rate — a degraded rate source returns 503 rather than a locked rate we could not honour.

POST
/v1/quotes

Authorization

partner-key
X-OnLink-Key<token>

In: header

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

application/json

application/json

curl -X POST "https://example.com/v1/quotes" \  -H "Content-Type: application/json" \  -d '{    "side": "buy"  }'
{  "quoteId": "f1c0a5d2-3b4e-4a71-9c8d-0e1f2a3b4c5d",  "side": "sell",  "kesAmount": "1281000.00",  "usdtAmount": "10000.000000",  "rate": "128.10",  "kesTotalAmount": "1305339.30",  "fee": {    "kesAmount": "24339.30",    "currency": "KES",    "percentBps": 190,    "flatKesAmount": "0.30",    "capKesAmount": null  },  "expiresAt": "2026-08-31T09:31:30.000Z",  "settlementEstimateSeconds": 21600}

Service status GET

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Create a buy order (KES in, USDT out) POST

Consumes a buy quote and debits the KES directly from your own VA balance — there is nothing to send and no payment instructions to read. Delivery is asynchronous: nothing is sent until the debit is confirmed and the order reaches a terminal state. Register a webhook endpoint rather than assuming a create means the trade is done. Retry-safe: creating twice with the same partnerReference returns the original order rather than a second one.