Invalid Order Book Parameters (invalid_order_book)

HTTP 400Horizon RFC 7807 ProblemCode: invalid_order_book

Type URI: https://orion.stellarchain.io/horizon-errors/invalid_order_book

The parameters specifying the SDEX order book pair (`/order_book`) are missing or invalid.

Quick Fix & Resolution

Provide valid selling_asset_type and buying_asset_type parameters along with code and issuer for credit assets.

Response Payload & SDK Handling

RFC 7807 JSON Response

{
  "type": "https://orion.stellarchain.io/horizon-errors/invalid_order_book",
  "title": "Invalid Order Book Parameters",
  "status": 400,
  "detail": "The parameters that specify what order book to view are invalid in some way. Please ensure that your type parameters (selling_asset_type and buying_asset_type) are one of the following valid values: native, credit_alphanum4, credit_alphanum12. Also ensure that you have specified selling_asset_code and selling_asset_issuer if selling_asset_type is not 'native', as well as buying_asset_code and buying_asset_issuer if buying_asset_type is not 'native'."
}

TypeScript (@stellar/stellar-sdk)

import { Horizon } from '@stellar/stellar-sdk';

const server = new Horizon.Server('https://pubnet.stellarchain.io');

try {
  const res = await server.ledgers().limit(10).call();
} catch (err: any) {
  const problem = err?.response?.data;
  if (problem?.type === 'https://orion.stellarchain.io/horizon-errors/invalid_order_book') {
    console.error('[invalid_order_book] HTTP 400:', problem.detail, problem.extras);
  }
}

Go (horizonclient)

client := &horizonclient.Client{
    HorizonURL: "https://pubnet.stellarchain.io",
}
_, err := client.Root()
if hErr := horizonclient.GetError(err); hErr != nil {
    if hErr.Problem.Status == 400 {
        log.Printf("Problem (%s): %s - extras=%v", hErr.Problem.Type, hErr.Problem.Detail, hErr.Problem.Extras)
    }
}

cURL Diagnostic

curl -i -s "https://pubnet.stellarchain.io/" \
  -H "Accept: application/hal+json"

Common Root Causes

• selling_asset_type or buying_asset_type is missing or not one of native, credit_alphanum4, credit_alphanum12.
• Non-native asset is missing *_asset_code or a valid StrKey *_asset_issuer.

---

← Back to All 23 Horizon Error Codes