Limit Operations | Ondo

getTradingLimits

Pre-flight check for a specific symbol/side pair — call this before createAttestation to confirm a trade is allowed.

Field	Type	Required	Description
`symbol`	text	✓ Yes	GM asset symbol.
`side`	select	✓ Yes	`buy` or `sell`.

Example response:

{
  "timestamp": "2026-07-29T14:00:00Z",
  "symbol": "AAPLon",
  "side": "buy",
  "maxTokens": "10000.000000000000000000",
  "maxNotionalValue": "1500000.000000000000000000",
  "remainingAttestations": 42,
  "isAssetTradingOpen": true,
  "reason": null
}

403 Forbidden risk: This is a GET, but it can still return AUTH_FORBIDDEN if the configured API key is read-only / lacks attestation scope — treat a 403 here the same as you would on a write-style call.

If the asset's market is closed, the result reports status: "closed_market" with reason populated and the numeric fields null.

getSessionLimits

Per-asset limits broken down by trading session. Ondo models 5 discrete sessions.

Field	Type	Required	Description
`symbol`	text	No	Omit to get session limits for all assets.

Session	Typical Window (ET)
Premarket	4:00 AM – 9:30 AM
Regular	9:30 AM – 4:00 PM
Postmarket	4:00 PM – 8:00 PM
Overnight	8:00 PM – 4:00 AM
Offhours	24/7 mode, active only when the regular market is closed

Example response:

{
  "limits": [
    { "symbol": "AAPLon",
      "premarket":  { "tradable": true,  "maxAttestationCount": 5, "maxActiveNotionalValue": "50000.000000000000000000" },
      "regular":    { "tradable": true,  "maxAttestationCount": 20, "maxActiveNotionalValue": "1500000.000000000000000000" },
      "postmarket": { "tradable": true,  "maxAttestationCount": 5, "maxActiveNotionalValue": "50000.000000000000000000" },
      "overnight":  { "tradable": false, "maxAttestationCount": 0, "maxActiveNotionalValue": "0.000000000000000000" },
      "offhours":   { "tradable": true,  "maxAttestationCount": 10, "maxActiveNotionalValue": "250000.000000000000000000" }
    }
  ],
  "timestamp": "2026-07-29T14:00:00Z",
  "count": 1
}

Tip: Check offhours.tradable alongside getMarketStatus's offhours.isOpen before routing a trade attempt outside regular hours — both must allow it.