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POST
/
v2
/
tokenized_assets
/
transact
/
sell
Python (SDK)
from compass_api_sdk import CompassAPI, models


with CompassAPI(
    api_key_auth="<YOUR_API_KEY_HERE>",
) as compass_api:

    res = compass_api.tokenized_assets.tokenized_assets_transact_sell(token_in="<value>", token_out="<value>", amount_in=8512.47, owner="<value>", chain=models.Chain.ARBITRUM, slippage="0.5", gas_sponsorship=False, fee={
        "recipient": "<value>",
        "amount": 3839.45,
        "denomination": models.TokenizedAssetsFeeDenomination.PERCENTAGE,
    })

    # Handle response
    print(res)
import { CompassApiSDK } from "@compass-labs/api-sdk";

const compassApiSDK = new CompassApiSDK({
  apiKeyAuth: "<YOUR_API_KEY_HERE>",
});

async function run() {
  const result = await compassApiSDK.tokenizedAssets.tokenizedAssetsTransactSell({
    tokenIn: "<value>",
    tokenOut: "<value>",
    amountIn: 8512.47,
    slippage: "0.5",
    owner: "<value>",
    chain: "arbitrum",
    gasSponsorship: false,
    fee: {
      recipient: "<value>",
      amount: 3839.45,
      denomination: "PERCENTAGE",
    },
  });

  console.log(result);
}

run();
curl --request POST \
  --url https://api.compasslabs.ai/v2/tokenized_assets/transact/sell \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "amount_in": "500",
  "chain": "ethereum",
  "gas_sponsorship": false,
  "owner": "0x29F20a192328eF1aD35e1564aBFf4Be9C5ce5f7B",
  "slippage": "0.5",
  "token_in": "USDC",
  "token_out": "mTBILL"
}
'
const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    amount_in: '500',
    chain: 'ethereum',
    gas_sponsorship: false,
    owner: '0x29F20a192328eF1aD35e1564aBFf4Be9C5ce5f7B',
    slippage: '0.5',
    token_in: 'USDC',
    token_out: 'mTBILL'
  })
};

fetch('https://api.compasslabs.ai/v2/tokenized_assets/transact/sell', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.compasslabs.ai/v2/tokenized_assets/transact/sell",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'amount_in' => '500',
    'chain' => 'ethereum',
    'gas_sponsorship' => false,
    'owner' => '0x29F20a192328eF1aD35e1564aBFf4Be9C5ce5f7B',
    'slippage' => '0.5',
    'token_in' => 'USDC',
    'token_out' => 'mTBILL'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.compasslabs.ai/v2/tokenized_assets/transact/sell"

	payload := strings.NewReader("{\n  \"amount_in\": \"500\",\n  \"chain\": \"ethereum\",\n  \"gas_sponsorship\": false,\n  \"owner\": \"0x29F20a192328eF1aD35e1564aBFf4Be9C5ce5f7B\",\n  \"slippage\": \"0.5\",\n  \"token_in\": \"USDC\",\n  \"token_out\": \"mTBILL\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("x-api-key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}
HttpResponse<String> response = Unirest.post("https://api.compasslabs.ai/v2/tokenized_assets/transact/sell")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"amount_in\": \"500\",\n  \"chain\": \"ethereum\",\n  \"gas_sponsorship\": false,\n  \"owner\": \"0x29F20a192328eF1aD35e1564aBFf4Be9C5ce5f7B\",\n  \"slippage\": \"0.5\",\n  \"token_in\": \"USDC\",\n  \"token_out\": \"mTBILL\"\n}")
  .asString();
require 'uri'
require 'net/http'

url = URI("https://api.compasslabs.ai/v2/tokenized_assets/transact/sell")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"amount_in\": \"500\",\n  \"chain\": \"ethereum\",\n  \"gas_sponsorship\": false,\n  \"owner\": \"0x29F20a192328eF1aD35e1564aBFf4Be9C5ce5f7B\",\n  \"slippage\": \"0.5\",\n  \"token_in\": \"USDC\",\n  \"token_out\": \"mTBILL\"\n}"

response = http.request(request)
puts response.read_body
{
  "estimated_amount_out": "<string>",
  "transaction": {
    "chainId": "0x2105",
    "data": "0x1688f0b900000000000000000000000029fcb43b46531bca003ddc8fcb67ffe91900c762000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000675f4a3d",
    "from": "0x4A83b4413CF41C3244027e1590E35a0F48403F0c",
    "gas": "0x7a120",
    "maxFeePerGas": "0x59682f00",
    "maxPriorityFeePerGas": "0x3b9aca00",
    "nonce": "0x5",
    "to": "0x4e1DCf7AD4e460CfD30791CCC4F9c8a4f820ec67",
    "value": "0x0"
  },
  "eip_712": {
    "domain": {
      "chainId": 8453,
      "verifyingContract": "0x6B90E8B4E3E971E74C1A47a3a20976377E2dB4b1"
    },
    "message": {
      "baseGas": "0",
      "data": "0x8d80ff0a0000000000000000000000000000000000000000000000000000000000000020",
      "gasPrice": "0",
      "gasToken": "0x0000000000000000000000000000000000000000",
      "nonce": "7",
      "operation": 1,
      "refundReceiver": "0x0000000000000000000000000000000000000000",
      "safeTxGas": "0",
      "to": "0x93C23AAE4793C14D6DF35D2A2A2234204e1559dA",
      "value": "0"
    },
    "primaryType": "SafeTx",
    "types": {
      "EIP712Domain": [
        {
          "name": "chainId",
          "type": "uint256"
        },
        {
          "name": "verifyingContract",
          "type": "address"
        }
      ],
      "SafeTx": [
        {
          "name": "to",
          "type": "address"
        },
        {
          "name": "value",
          "type": "uint256"
        },
        {
          "name": "data",
          "type": "bytes"
        },
        {
          "name": "operation",
          "type": "uint8"
        },
        {
          "name": "safeTxGas",
          "type": "uint256"
        },
        {
          "name": "baseGas",
          "type": "uint256"
        },
        {
          "name": "gasPrice",
          "type": "uint256"
        },
        {
          "name": "gasToken",
          "type": "address"
        },
        {
          "name": "refundReceiver",
          "type": "address"
        },
        {
          "name": "nonce",
          "type": "uint256"
        }
      ]
    }
  },
  "fee_amount": "<string>",
  "settlement": "instant",
  "poll_endpoint": "<string>"
}
{
  "error": "<string>",
  "message": "<string>"
}

Authorizations

​
x-api-key
string
header
required

Your Compass API Key. Get your key here.

Body

application/json

Buy or sell a swap-traded tokenized asset inside the product account.

Applies to RWA yield assets (Midas mTokens). Equities trade via the order endpoints instead.

​
token_in
string
required

Token to spend. For a buy this must be a stablecoin the Midas issuance vault accepts (USDC on every supported network; mBASIS also accepts USDT/DAI on Ethereum). For a sell it is the Midas RWA asset to redeem (e.g. 'mTBILL').

Examples:

"USDC"

"mTBILL"

​
token_out
string
required

Token to receive. For a buy this is the Midas RWA asset to mint (e.g. 'mTBILL'); for a sell it is the payout stablecoin (USDC).

Examples:

"mTBILL"

"USDC"

​
amount_in
required

Human-readable amount of token_in to trade (token units, not wei).

Required range: x > 0
Example:

500

​
owner
string
required

The owner's wallet address.

​
chain
enum<string>
required

Network to trade on. Midas RWA assets exist on Ethereum and Base.

Available options:
base,
ethereum,
arbitrum,
hyperevm,
tempo,
bsc
​
slippage
default:0.5

Maximum slippage tolerance as a percentage (e.g., 0.5 = 0.5%).

Example:

0.5

​
gas_sponsorship
boolean
default:false

When true, returns an EIP-712 payload for gas-sponsored execution instead of an unsigned transaction.

​
fee
TokenizedAssetsFee · object | null

Optional partner fee charged when selling (exiting). It is taken from the payout-token (USDC) proceeds and sent to your fee recipient inside the same execution.

Response

Successful Response

Unsigned trade execution for the owner to sign.

Exactly one of transaction (gas_sponsorship=false) or eip_712 (gas_sponsorship=true) is set.

​
estimated_amount_out
string
required

Estimated amount of token_out received (human-readable units).

Pattern: ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$
​
transaction
UnsignedTransaction · object | null

Unsigned transaction executing the trade in the product account.

Example:
{
  "chainId": "0x2105",
  "data": "0x1688f0b900000000000000000000000029fcb43b46531bca003ddc8fcb67ffe91900c762000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000675f4a3d",
  "from": "0x4A83b4413CF41C3244027e1590E35a0F48403F0c",
  "gas": "0x7a120",
  "maxFeePerGas": "0x59682f00",
  "maxPriorityFeePerGas": "0x3b9aca00",
  "nonce": "0x5",
  "to": "0x4e1DCf7AD4e460CfD30791CCC4F9c8a4f820ec67",
  "value": "0x0"
}
​
eip_712
BatchedSafeOperationsResponse · object | null

EIP-712 payload for gas-sponsored execution.

Example:
{
  "domain": {
    "chainId": 8453,
    "verifyingContract": "0x6B90E8B4E3E971E74C1A47a3a20976377E2dB4b1"
  },
  "message": {
    "baseGas": "0",
    "data": "0x8d80ff0a0000000000000000000000000000000000000000000000000000000000000020",
    "gasPrice": "0",
    "gasToken": "0x0000000000000000000000000000000000000000",
    "nonce": "7",
    "operation": 1,
    "refundReceiver": "0x0000000000000000000000000000000000000000",
    "safeTxGas": "0",
    "to": "0x93C23AAE4793C14D6DF35D2A2A2234204e1559dA",
    "value": "0"
  },
  "primaryType": "SafeTx",
  "types": {
    "EIP712Domain": [
      { "name": "chainId", "type": "uint256" },
      {
        "name": "verifyingContract",
        "type": "address"
      }
    ],
    "SafeTx": [
      { "name": "to", "type": "address" },
      { "name": "value", "type": "uint256" },
      { "name": "data", "type": "bytes" },
      { "name": "operation", "type": "uint8" },
      { "name": "safeTxGas", "type": "uint256" },
      { "name": "baseGas", "type": "uint256" },
      { "name": "gasPrice", "type": "uint256" },
      { "name": "gasToken", "type": "address" },
      {
        "name": "refundReceiver",
        "type": "address"
      },
      { "name": "nonce", "type": "uint256" }
    ]
  }
}
​
fee_amount
string | null

Fee charged on the sell, in payout-token (USDC) units. Null when no fee was applied.

Pattern: ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$
​
settlement
enum<string>
default:instant

How the trade settles. instant: the signed transaction completes the trade (Midas/Ondo swaps and IXS deposits). async: the transaction only requests an IXS redemption, which the vault operator settles off-chain later — poll poll_endpoint for status.

Available options:
instant,
async
​
poll_endpoint
string | null

For async settlements, the endpoint to poll for redemption status (GET /v2/tokenized_assets/redemptions). Null for instant trades.