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Introduction

Before integrating a memecoin or token using Crossmint’s checkout, it’s important to verify that it’s supported by Crossmint. This guide will show you how to use the Crossmint API to check if a specific token is supported and what features are available for it.

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Prerequisites

1

Create a server-side API key

Get your API keys from the Crossmint Console

Once you log in to the console, the next step is to create an .

Click the "Integrate" tab and click on the "API Keys" option on top.

More info on creating API keys here

2

Enable the orders.create scope

Make sure the orders.create scope is enabled for your API key.

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Getting Started

The Supported Tokens API allows you to query the status of any token to determine if it’s supported by Crossmint and what features are available.

  • Endpoint: https://www.crossmint.com/api/v1-alpha2/tokens/:tokenLocator
  • Method: GET
  • Authentication: Requires either a server or client API key

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Token Locator Format

Currently, memecoin checkout only supports the Solana network.

The token locator follows this format:

network:tokenAddress

Example:

  • TRUMP: solana:6p6xgHyF7AeE6TZkSmFsko444wqoP15icUSqi2jfGiPN

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Checking Token Support

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Using JavaScript

Here’s how to check if a token is supported using JavaScript:

// Example usage
const apiKey = "your-api-key"; // Replace with your actual API key
const tokenLocator = "solana:6p6xgHyF7AeE6TZkSmFsko444wqoP15icUSqi2jfGiPN"; // Example: TRUMP token

const checkTokenSupport = async (apiKey, tokenLocator) => {
    try {
        const response = await fetch(`https://www.crossmint.com/api/v1-alpha2/tokens/${tokenLocator}`, {
            method: "GET",
            headers: {
                "X-API-KEY": apiKey,
                "Content-Type": "application/json",
            },
        });

        const data = await response.json();
        return data;
    } catch (error) {
        console.error("Error checking token support:", error);
        throw error;
    }
};

checkTokenSupport(apiKey, tokenLocator)
    .then((result) => {
        console.log("Token support details:", result);

        if (result.available) {
            console.log("This token is supported by Crossmint!");
        } else {
            console.log("This token is not currently supported.");
        }

        console.log("Available features:", result.features);
    })
    .catch((err) => {
        console.error("Failed to check token support:", err);
    });

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Sample Response

A successful response will look similar to this:

{
    "token": "solana:6p6xgHyF7AeE6TZkSmFsko444wqoP15icUSqi2jfGiPN",
    "available": true,
    "features": {
        "creditCardPayment": true
    }
}

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Integrating with Your Checkout Flow

Once you’ve confirmed that a token is supported, you can use the information from the API response to customize your checkout experience.

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Example: Pre-checkout Validation

Here’s an example of how to incorporate token support checking before initiating a checkout:

const initiateCheckout = async (apiKey, tokenLocator, amount, recipientWallet) => {
    // First, check if the token is supported
    const tokenSupport = await checkTokenSupport(apiKey, tokenLocator);

    if (!tokenSupport.available) {
        throw new Error("This token is not currently supported by Crossmint.");
    }

    if (!tokenSupport.features.creditCardPayment) {
        throw new Error("Credit card payment is not available for this token.");
    }

    // If we get here, the token is supported with credit card checkout
    // Proceed with creating an order
    const orderResponse = await fetch("https://www.crossmint.com/api/2022-06-09/orders", {
        method: "POST",
        headers: {
            "X-API-KEY": apiKey,
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            lineItems: {
                tokenLocator: tokenLocator,
                executionParameters: {
                    mode: "exact-in",
                    amount: amount,
                    maxSlippageBps: "500",
                },
            },
            payment: {
                method: "stripe-payment-element",
                receiptEmail: "user@example.com", // Replace with user's email
            },
            recipient: {
                walletAddress: recipientWallet,
            },
        }),
    });

    return await orderResponse.json();
};

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Best Practices

  1. Cache Results (with caution): Token support status can change, but for frequently accessed tokens, consider caching results for a short period (e.g., 1 hour) to reduce API calls.

  2. Handle Errors Gracefully: Implement proper error handling to provide clear feedback to users when a token is not supported.

  3. Check Before Displaying Options: Only display payment methods that are actually available for the token.

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Next Steps

Credit Card Memecoin Checkout

Now that you can check token support, learn how to implement a credit card checkout for memecoins

Order Lifecycle

Understand the lifecycle of orders in Crossmint’s checkout flow

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