An NFT token development company designs and deploys the smart contract behind a set of NFTs, in which each NFT is a token ID mapped to an owner address and a link to metadata. Most of the work is choosing the standard and extensions, deciding where metadata lives and limiting admin powers.
This page covers the token itself and what NFT token development services should deliver. For contract engineering practice and security testing, read the smart contract NFT development guide.
What makes a token non-fungible
A fungible token, such as an ERC-20 token, tracks balances, so if you own 50 units, any unit equals any other unit. A non-fungible token tracks individual IDs, such as token 4021 of a specific contract, and the pair of contract address and token ID is unique across the whole chain. Images, traits and perks are not part of the token itself; metadata or application logic attaches them to the token ID.
The main NFT token standards
| Standard | Chain | Use it for |
|---|---|---|
| ERC-721 | Ethereum and other EVM chains | Unique items: one-of-one art, profile-picture collections, deeds, tickets with seat numbers |
| ERC-721A | EVM chains | An ERC-721-compatible implementation that makes batch minting cheaper |
| ERC-1155 | EVM chains | Editions and game items. One contract holds many token types, fungible or not. |
| Metaplex Core and Bubblegum | Solana | Metaplex Core is the current Metaplex NFT standard, with a plugin system. Bubblegum v2 creates compressed NFTs for very large drops. |
| TRC-721 | TRON | TRON's equivalent of ERC-721 |
ERC-721 defines ownership, transfers, approvals and the tokenURI function. ERC-1155 adds a balance for each token ID and batch transfers, which save gas when a game player moves twenty items at once. Some teams use ERC-1155 for unique art because the standard is newer, but many collectors and tools still treat ERC-721 as the default for one-of-a-kind work.
Extensions for NFT token development
- ERC-2981 (royalties). The contract reports a royalty recipient and amount for any sale price. Marketplaces may pay the royalty, but the ERC-2981 specification makes payment voluntary.
- ERC-4907 (rentals). The contract adds a "user" role with an expiry date, separate from the owner, which game items and access passes use.
- ERC-5192 (soulbound tokens). The contract marks a token as locked to its holder, which suits credentials, attendance badges and memberships that should not be resold.
- ERC-6551 (token-bound accounts). Each NFT gets its own smart contract wallet, so a game character can hold its own items. The standard is still in review status, not final.
- ERC-4906 (metadata update events). The contract tells marketplaces to refresh metadata after a reveal or a trait change.
- ERC-721C (creator tokens). Limit Break's standard lets a creator limit transfers to approved exchanges, which can enforce royalties.
- ERC-7572 (contract metadata). A draft standard for collection-level metadata through a
contractURI()function.
How NFT metadata works
The contract stores a base URI or a URI for each token. A call to tokenURI(id) returns a link to a JSON file that holds a name, a description, an image link and a list of attributes, which marketplaces read to display the item. The storage location of the JSON file and the image decides how long they last:
- Your own web server. You can change files easily, but you can also alter or lose them, and holders cannot verify that nothing changed.
- IPFS. Files are addressed by their content hash, so the hash proves that a file has not changed. Someone must pin the files, or they disappear from the network. The guide to IPFS blockchain development explains pinning.
- Arweave. You pay once for long-term storage.
- Fully on-chain. The contract generates the image and the JSON itself, which is expensive for large media and works well for small SVG or pixel art.
Design decisions before you deploy
- Supply. Choose a fixed cap, an open edition with a time window or a supply that the issuer controls. If you promise a cap, write it into the contract.
- Mutability. Decide whether metadata can change, and if so, who can change it. Dynamic NFTs for games or tickets need changes, and art usually should not change.
- Transfer rules. Choose free transfers, soulbound tokens or transfers limited to approved marketplaces; limits suit tickets and credentials better than collectibles.
- Admin roles. Define who can mint, pause, change URIs and withdraw funds, and put any valuable role behind a multisig wallet.
- Upgradeability. A proxy contract allows fixes, but it also lets the issuer change the rules later. Collectors often prefer token contracts that cannot be upgraded, because the rules then cannot change after they buy.
- Wallet experience. Decide whether users bring their own wallets or get embedded wallets at login. Smart accounts, and EIP-7702 on Ethereum since May 2025, let the app pay gas for users.
What NFT token development services include
| Deliverable | What it should contain |
|---|---|
| Token specification | Standard, extensions, supply rules, transfer rules, admin roles and metadata plan in writing |
| Contract code | Code built on audited libraries such as OpenZeppelin, with comments and a deployment script |
| Test suite | Unit tests and fuzz tests for minting, payments, withdrawals and admin functions |
| Metadata pipeline | Scripts that generate JSON files, upload media and pin it on IPFS or Arweave |
| Audit | An outside review of custom code, and a record of how each finding was fixed |
| Deployment | Verified source code on the block explorer and admin roles moved to your multisig |
| Mint page (optional) | Wallet connection, allowlist checks and a sale page |
A product built around the token, such as a marketplace, minting platform or game economy, needs more than a token contract, and the guide to choosing an NFT development company covers marketplaces, minting platforms and game economies.
NFT token development cost drivers
Development and audit cost far more than deployment, and these factors drive the cost of an NFT token project:
- Custom logic. A standard contract built from audited libraries needs less engineering and a shorter audit than custom mint, payment or game logic.
- Number of chains. Each EVM chain needs its own deployment and tests, and Solana and TRON need separate contracts.
- Metadata volume. Large collections need generation scripts, media processing and paid storage.
- Audit scope. Audit firms price by the amount and complexity of the code, so get quotes for your actual contract.
Deployment cost equals the gas the deployment uses, multiplied by the gas price and the price of the chain's token, so deploy to a testnet first to measure the gas use. On layer 2 networks and Polygon, the same deployment usually costs a small fraction of the Ethereum mainnet cost.
How to choose an NFT token development company
- Ask for addresses of contracts the team deployed, and read the verified source code on a block explorer.
- Check who holds the admin roles in those contracts and whether they sit behind a multisig.
- Ask for a past audit report and the list of fixed findings.
- Ask where the team stores metadata and what happens to it if the team stops working on the project.
- Confirm that you will own the code, the deploy keys and the storage accounts.
Use cases for NFT tokens today
Tickets, memberships, in-game items, credentials, loyalty rewards and records of vaulted physical goods have outlasted the 2021 boom because in each case the token does a specific job. Pure collectibles succeed only with an active community, and a token standard cannot create that community. A points system is fungible, so an ERC-20 token may suit it better than an NFT; the Ethereum token development guide covers ERC-20 tokens.
Frequently asked questions
Should I use ERC-721 or ERC-1155?
Use ERC-721 for unique items and most art and profile-picture collections. Use ERC-1155 for editions, game items and any case where users hold several copies of the same item type.
Can I change an NFT after it is minted?
Only if the contract allows changes, either by updating the metadata URI or by computing metadata from on-chain data. Publish the rules for changes before the mint.
Is a TRC-721 token compatible with Ethereum wallets?
No. TRON runs its own network and wallets, and moving a TRON NFT to an EVM chain needs a bridge, and the bridge creates a wrapped copy instead of moving the original token.
How much does it cost to deploy an NFT contract?
Deployment cost is the gas used, times the gas price, times the price of the chain's token. The gas used depends on contract size, so measure it on a testnet; layer 2 networks and Polygon cost much less than Ethereum mainnet.
What should NFT token development services include?
At a minimum, they should include a written token specification, contract code on audited libraries, a test suite, a metadata and storage plan, an audit of custom code, and a verified deployment with admin roles in your control.