Retrieve Valid Inscriptions Using Fractal Ordinals API

Accessing valid inscriptions linked to a specific wallet address is a crucial function for developers and users interacting with Bitcoin-based NFTs and BRC-20 tokens. The Fractal Ordinals API provides a reliable and efficient way to retrieve this data through a dedicated endpoint. Whether you're building a marketplace, wallet interface, or analytics dashboard, understanding how to use this API effectively enhances both functionality and user experience.

This guide walks you through the complete process of using the Get Valid Inscriptions endpoint, including request parameters, response structure, and practical implementation insights.

Understanding the API Endpoint

The Fractal Ordinals API allows developers to fetch valid inscription data associated with a given wallet address. This is particularly useful in Web3 applications where tracking ownership, verifying authenticity, or displaying digital collectibles is required.

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Request Method and URL

To retrieve valid inscriptions, send a POST request to the following URL:

https://web3.okx.com/api/v5/mktplace/nft/fractal-ordinals/get-valid-inscriptions

This secure endpoint supports pagination, filtering, and sorting to ensure optimal performance even when handling large datasets.

Request Parameters Explained

Each request must include specific parameters to define the scope and format of the data returned. Below is a breakdown of all available options.

Required Parameters

• slug (String)
  The unique identifier (slug) of the collection you're querying. Each collection has a distinct slug that ensures accurate data retrieval.
• limit (String)
  Sets the maximum number of results per page. Accepts values from 1 to 100. Default value: 10.
• walletAddress (String)
  The Bitcoin or Ordinals-compatible wallet address for which you want to retrieve valid inscriptions.

Optional Parameters

• cursor (String)
  Used for pagination. Include the cursor value from a previous response to fetch the next set of results.

• sort (String)
  Defines the sorting order of results:

  • listing_time_desc: Sort by listing time, newest first (default)
  • listing_time_asc: Oldest first
  • price_desc: Highest price first
  • price_asc: Lowest price first
  • unitprice_desc: Highest unit price first
  • unitprice_asc: Lowest unit price first
• isBrc20 (Boolean)
  Determines whether to return Fractal NFTs or BRC-20 token listings. Defaults to true (BRC-20).

These parameters give developers fine-grained control over data retrieval, enabling tailored experiences for end users.

Interpreting the Response Data

The API returns an array of inscription objects, each containing key metadata about the asset. Understanding these fields is essential for rendering accurate information in your application.

Key Response Fields

• inscriptionId (String)
  A unique identifier for the inscription on the Bitcoin blockchain. This ID can be used to verify provenance or track transfers.
• cursor (String)
  A pagination token. Use this value in subsequent requests to load more results seamlessly.
• nftId (String)
  The internal NFT identifier within the platform’s system, useful for indexing or database storage.
• ticker (String)
  The ticker symbol of the BRC-20 token (e.g., "ORDI", "SATS"). Relevant only if isBrc20 is true.
• tickerId (String)
  Unique identifier for the BRC-20 token type.
• amount (String)
  The quantity of inscriptions included in the current record—particularly relevant for fungible token inscriptions.

This structured response makes it easy to parse and display data in tables, galleries, or detailed views.

Practical Use Cases and Integration Tips

Developers can leverage this API in various real-world scenarios:

• Wallet Applications: Display all valid inscriptions owned by a user.
• Marketplace Listings: Show available NFTs or BRC-20 tokens from a seller's wallet.
• Portfolio Trackers: Build analytics tools that monitor asset holdings over time.
• Verification Tools: Allow users to confirm the authenticity of their digital assets.

When integrating:

• Always validate the walletAddress format before sending requests.
• Handle pagination gracefully using the cursor field to avoid missing data.
• Cache responses where appropriate to reduce API load and improve speed.

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Frequently Asked Questions

Q: What does “valid inscription” mean in this context?
A: A valid inscription refers to a digitally carved piece of content (like an image, text, or token) on a Bitcoin satoshi that hasn’t been spent or invalidated by a subsequent transaction.

Q: Can I use this API to retrieve both NFTs and BRC-20 tokens?
A: Yes. By setting the isBrc20 parameter to true or false, you can filter results between BRC-20 tokens and Fractal NFTs respectively.

Q: Is there a rate limit for this API?
A: While exact limits depend on your access tier, most endpoints support high-frequency calls. For production apps, consider implementing exponential backoff and caching mechanisms.

Q: How often is the inscription data updated?
A: The backend syncs with the blockchain in near real-time, ensuring up-to-date results within seconds of new transactions being confirmed.

Q: Do I need authentication to call this endpoint?
A: Yes. Most production environments require an API key or OAuth token for secure access. Refer to the full Web3 API documentation for setup instructions.

Q: Can I sort results by price?
A: Absolutely. Use price_asc or price_desc in the sort parameter to organize results based on listing price.

Final Thoughts

The Fractal Ordinals API is a powerful tool for developers working in the Bitcoin ecosystem. With its clean structure and flexible parameters, retrieving valid inscriptions becomes a straightforward task—whether you're building decentralized marketplaces, wallets, or analytical platforms.

By combining precise filtering, intuitive sorting, and efficient pagination, this endpoint supports scalable applications that deliver fast and accurate user experiences.

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