/* Primary header CTA button */
#topbar-cta-button > a > span {
    border-radius: .5rem;
    background-color: #000;
}

a.rounded-xl {
  border-radius: .5rem;
}

/* Primary header CTA button - Dark mode */
html.dark #topbar-cta-button > a > span {
    background-color: #FFF;
}

/* Primary header CTA button text */
#topbar-cta-button > a > span + div > span {
    color: #FFF;
}

/* Primary header CTA button text - Dark mode */
html.dark #topbar-cta-button > a > span + div > span {
    color: #000;
}

/* Primary header CTA button icon - Dark mode */
html.dark #topbar-cta-button > a > span + div > svg {
    color: #000;
}

/* Hide the Mintlify link in the footer */
#footer .sm\:flex > a {
    display: none !important;
}

#navigation-items > div:not(:last-child) {
    border-bottom: 1px solid rgb(var(--gray-400)/0.2);
    padding-bottom: 1rem;
}

html.dark #navigation-items > div:not(:last-child) {
    border-top-color: rgb(var(--gray-600)/0.3);
}

#navigation-items > div:not(:first-child) {
    margin-top: 1rem;
}

a.link {
    border-bottom: 1px solid rgb(var(--primary-dark))
}

.mint-mx-auto {
    margin-left: auto;
    margin-right: auto
}

(function loadIBMPlexSans() {
  const head = document.head;

  [
    { rel: "preconnect", href: "https://fonts.googleapis.com" },
    { rel: "preconnect", href: "https://fonts.gstatic.com", crossorigin: "" },
  ].forEach((attrs) => {
    const link = Object.assign(document.createElement("link"), attrs);
    head.appendChild(link);
  });

  const fontLink = document.createElement("link");
  fontLink.rel = "stylesheet";
  fontLink.href =
    "https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&display=swap";
  head.appendChild(fontLink);

  const style = document.createElement("style");
  style.textContent = `
      :root {
        --font-sans: "IBM Plex Sans", system-ui, -apple-system, BlinkMacSystemFont,
                     "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      }
  
      body, #content-area, #sidebar, #navbar {
        font-family: var(--font-sans);
      }
  
      h1, h2, h3, h4, h5, h6 {
        font-family: var(--font-sans);
        font-weight: 600;
      }
    `;
  head.appendChild(style);
})();


Explore chains supported by Sim's EVM API endpoints.

Supported Chains

Sim APIs

Quickstart

Developer Quickstart

Overview

EVM Overview

Create a multichain wallet that displays realtime balances, transactions, and NFTs using Sim APIs and Express.js

1. Build a Realtime Wallet

Build a Realtime Wallet

Expand your realtime crypto wallet by integrating a dynamic feed of onchain activity.

2. Add Account Activity

Add Account Activity

Complete your realtime crypto wallet by adding a visual display of a user's NFT collection.

3. Show NFTs/Collectibles

Show NFT Collectibles in Your Wallet

Access realtime token balances. Get comprehensive details about native and ERC20 tokens, including token metadata and USD valuations.

Balances

View chronologically ordered transactions including native transfers, ERC20 movements, NFT transfers, and decoded contract interactions.

Activity

Retrieve EVM compatiable NFTs (ERC721 and ERC1155) that include token identifiers, token standard, chain information, balance, and basic token attributes.

Collectibles

Retrieve granular transaction details including block information, gas data, transaction types, and raw transaction values.

Transactions

Get detailed metadata and realtime price information for any native asset or ERC20 token including symbol, name, decimals, supply information, USD pricing, and logo URLs.

Token Info

Discover token distribution across ERC20 or ERC721 holders, ranked by wallet value.

Token Holders

SVM Overview

Get token balances for a given SVM address

Build with AI

Learn how Sim APIs filter out spam tokens and how to customize filtering for your specific needs.

Spam Filtering

Error Handling

Learn how to set up a Cloudflare Worker to securely proxy your Sim API requests, protecting your API key from client-side exposure.

Cloudflare Proxy

Integrate Sim APIs into your React app with official hooks for Balances and Transactions data.

Sim APIs

EVM

SVM

Resources