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Does f(x) Wallet have an API?

Does f(x) Wallet have an API?

Yes, f(x) Wallet does have an API, which provides access to various features such as Asset Management, Blockchain Interaction, DApp Exploration, Security and Key Management, User Experience, and Transaction Management. However, an alternative to using f(x) Wallet's public API is the Mesh API, which has built integrations with 300+ digital asset exchanges and wallets, allowing developers to build products that enable users to access their digital assets from various platforms, all via a single integration with Mesh.

About f(x) Wallet

f(x) Wallet is a decentralized, non-custodial wallet that supports ERC-20 and Function X tokens, with upcoming support for Binance Smart Chain and Bitcoin blockchain. The wallet allows users to manage, transfer, and grow their digital assets using various DApps, including DeFi protocols, and supports cross-chain transactions and DeFi features such as staking, savings, and swaps. Additionally, f(x) Wallet provides fiat on-ramp support for users in over 170 countries, making it a versatile choice for managing digital assets.

General usage

Here's a brief summary of f(x)'s APIs:

  1. Asset Management APIs: These would include APIs for managing multiple blockchain assets supported by f(x) Wallet, like BTC, ETH, FX, NPXS, and all ERC-20 tokens.
  2. Blockchain Interaction APIs: APIs in this category would likely facilitate transactions across multiple blockchain networks, which f(x) Wallet supports, including Bitcoin, Ethereum, and Function X networks. They might also handle tasks like wallet address management and blockchain network switching.
  3. DApp Exploration APIs: Given that f(x) Wallet allows users to explore various decentralized applications (DApps), there would be APIs to interact with these DApps, such as Swap, CryptoBank, and FX delegating.
  4. Security and Key Management APIs: Since f(x) Wallet is a decentralized wallet where users own their private keys, APIs under this category would likely assist in private key management, ensuring secure authorization of transactions and custody of digital assets.
  5. User Experience APIs: These would include APIs to enhance the user experience, such as language settings, layout customization, and managing visibility of tokens and blockchains within the wallet interface.
  6. Transaction Management APIs: Given the wallet's functionality, APIs in this category would handle sending digital assets, managing transaction fees, and ensuring transactions are processed on the blockchain.


This is how you would authenticate your requests to the f(x) Wallet API:

  1. Generate an API key via the f(x) Wallet website, and write down the key, secret, and passphrase.
  2. Choose the appropriate permissions for your API key based on your needs.
  3. Include the necessary headers in your API requests, such as the API key, signature, timestamp, and passphrase.
  4. Calculate the timestamp header as the number of seconds since Unix Epoch in UTC.
  5. Create the signature header by generating a hash using the secret key on the prehash string, which includes the timestamp, method, request path, and body (if applicable). Encode the resulting signature and include it in the signature header.


Here are the most common API errors for f(x) Wallet API:

  • 5 - Insufficient Funds: This error occurs when there are not enough funds in the wallet to cover transaction fees or the requested transfer amount.
  • 11 - Out of Gas: This error indicates that a transaction has run out of computational resources (gas) allocated for its execution.
  • 8 - Invalid Public Key: This error is triggered when an invalid or improperly formatted public key is provided during transactions or interactions with the wallet.

Recent changes

Here are the most recent changes to the f(x) Wallet API

  • [v2.1.1] - 2022-07-11: The update added support for the x-crisis-skip-assert-invariants CLI flag to the start command and fixed an issue with CLI parsing for the legacy proposal InitCrossChainParamsProposal. Additionally, it involved the deletion of Polygon(USDT) and Tron(USDT) contracts and metadata initialization during migration and upgrade, along with a refactoring of the gravity handle for FxOriginatedTokenClaim.
  • [v2.1.0] - 2022-06-29: Key components like tendermint and cosmos-sdk were upgraded to newer versions. The IBC version was enhanced from Cosmos-SDK/x/ibc to IBC-Go v3.1.0, and additional modules were introduced. Notably, the Oracle deposit process was improved, automatically delegating to the most powerful validator after the upgrade. There were also adjustments to specific features like MsgRequestBatch, crosschain settings, and block gas limits.

An alternative to the f(x) Wallet API

While f(x) Wallet API offers a range of features for managing digital assets, the Mesh API provides additional benefits developers and businesses looking to streamline cryptocurrency transactions within their applications. In this section, we will discuss the advantages of using the Mesh API over f(x) Wallet's own API. Here are some reasons why using the Mesh API is a better option than accessing f(x) Wallet's own API directly:

  • Integrated User Experience: The Mesh API seamlessly embeds cryptocurrency functionalities into your app, offering a smooth user journey and reducing friction for users.
  • Broad Connectivity: With a single integration, Mesh API connects to over 300 brokerages, exchanges, and wallets, providing extensive flexibility and choice for your application.
  • Simplified Asset Management: Mesh API eases the process of depositing assets, allowing transfers from various sources directly within your app for enhanced user convenience.
  • Cost Benefits: Mesh offers customized pricing options for businesses, which can be discussed with their sales team.

Start with Mesh today and experience the ease and efficiency of their cutting-edge API in your digital asset endeavors.