Question 1

What Does Bittensor Subnet Registration Cost in 2025?

Accepted Answer

Bittensor subnet registration cost is not a fixed fee. It is set by the network's dynamic registration mechanism, which raises the cost each time a subnet is registered and decays it over time, so the amount you pay depends on current demand and the exact block at which your transaction lands. In 2025 you should treat the cost as a moving target and read it live from the chain rather than relying on a static number.

This article explains how the cost is calculated, how to query the current value over RPC, how to estimate your real total spend including lock cost and recycling, and how to keep your registration and subnet operations connected with reliable infrastructure such as OnFinality's Bittensor RPC and dedicated nodes.

Question 2

What is a Binance Smart Chain archive node and when do you need one?

Accepted Answer

A Binance Smart Chain (BNB Smart Chain) archive node keeps the full historical state of the chain, so you can query balances, storage slots, and contract state at any past block height. Standard full nodes prune old state, which is why historical queries fail against them. Archive access is essential for analytics, tax and accounting tools, indexers, and any backend that needs to reconstruct what happened at a specific block. You can connect to an archive-capable endpoint through OnFinality's RPC API or run a dedicated archive node when your workload needs consistent historical throughput.

Question 3

Celo API Access: Chain Settings, Methods, and Failure Modes

Accepted Answer

The Celo API is a JSON-RPC interface that lets your application read chain state, submit transactions, and subscribe to events on Celo Mainnet. You connect to it through an HTTPS endpoint using standard EVM methods such as eth_blockNumber, eth_getBalance, and eth_call, plus Celo-specific calls for fee currencies and mobile-friendly gas abstraction. This article covers the chain settings you need, how to send your first request, and how to diagnose the failures developers hit most often. It also explains when a shared public endpoint is enough and when a dedicated Celo node is the better fit for production workloads.

Question 4

TON API Keys: How Do You Get One and When Do You Need It?

Accepted Answer

A TON API key is a credential that authenticates your requests to a TON RPC or HTTP API endpoint, letting a provider attribute traffic to your project and apply its own rate limits and access rules. Public endpoints usually work without a key, but they are shared and best suited to prototypes, while production apps typically need a keyed endpoint or a dedicated node.

This article explains what a TON API key actually does, how to get one, how to send your first authenticated request, and when a shared keyed endpoint stops being enough and a dedicated TON node becomes the better fit.

Question 5

What Is a Solana Devnet Address and How Do You Use One?

Accepted Answer

A Solana devnet address is a public key on the Solana devnet cluster, a test network that mirrors mainnet behavior without using real SOL. You use it to airdrop test SOL, deploy programs, and run transactions before shipping to mainnet. The address format is identical to mainnet, so the only thing that changes is the RPC endpoint your tooling points at.

This article explains how devnet addresses differ from mainnet, how to generate and fund one, how to configure wallets and RPC clients, and how to debug the errors that show up when a devnet address is unfunded or pointed at the wrong cluster.

Question 6

Polygon Mainnet RPC: How Do You Connect to Chain ID 137?

Accepted Answer

Polygon Mainnet is an EVM-compatible chain identified by chain ID 137, with POL as its native gas token. To connect, point your wallet or app at an HTTP or WebSocket RPC endpoint and confirm the chain ID matches 137 before sending transactions. OnFinality provides a public Polygon endpoint for testing and dedicated Polygon node infrastructure for production workloads that need consistent capacity.

Question 7

What should I know about Polygon PoS endpoints?

Accepted Answer

Polygon PoS endpoints are the HTTP and WebSocket URLs your app uses to read chain state and submit transactions to the Polygon proof-of-stake network. The mainnet chain ID is 137, the native gas token is POL, and a working endpoint needs to support the JSON-RPC methods your workload actually calls. This page covers chain settings, endpoint options, request examples, and the failure modes that show up in production.

Use it to decide whether a shared public endpoint is enough for your traffic or whether you need a dedicated Polygon node. OnFinality provides Polygon PoS RPC through its API service and dedicated node infrastructure, so you can start on a shared endpoint and move to isolated capacity as your request volume or indexing needs grow.

Question 8

Which Solana RPC services offer enhanced APIs tailored for NFT and DeFi data?

Accepted Answer

Most Solana RPC providers expose the same core JSON-RPC surface, so the real differentiator for NFT and DeFi workloads is how well a provider handles token accounts, program logs, compressed NFTs, and high-volume getProgramAccounts calls. Enhanced APIs usually mean indexed or specialized methods layered on top of standard RPC, plus dedicated node capacity for the read patterns that NFT marketplaces and DeFi dashboards generate. OnFinality provides Solana RPC API access and dedicated node infrastructure that teams can size around these workloads, with HTTP and WebSocket transports available.

Question 9

How do Solana NFT API providers handle scalability and low-latency data retrieval?

Accepted Answer

Solana NFT applications depend on fast, consistent access to on-chain state: token accounts, metadata pointers, mint authorities, and compressed NFT proofs. The bottleneck is rarely the API wrapper itself — it is the RPC layer underneath it. When that layer is shared and rate-limited, metadata lookups, holder snapshots, and wallet refreshes slow down under load.

This article explains how to evaluate Solana NFT API providers for scalability and low-latency retrieval, which RPC methods and transports matter, and when a dedicated Solana node is the better fit than a shared endpoint. It includes endpoint settings, a curl example, and a failure-mode table you can use during provider evaluation.

Question 10

What is the Binance Beacon Chain explorer and how do you query it?

Accepted Answer

The Binance Beacon Chain was the staking and governance layer of the BNB Chain ecosystem, running alongside BNB Smart Chain before the two were merged in the 2024 opBNB-era consolidation. Its explorer let you inspect validators, delegations, and cross-chain activity. Today, most developers interact with the BNB Chain ecosystem through BNB Smart Chain RPC endpoints instead.

This page explains what the Beacon Chain explorer showed, why it matters for historical lookups, and how to move to the BNB Smart Chain RPC workflow that OnFinality supports for production apps. You can connect to a public endpoint for testing or run dedicated node infrastructure for heavier workloads.

Question 11

Base L2 on Ethereum: How to Connect and When to Use It

Accepted Answer

Base is an Ethereum Layer 2 network that settles transactions on Ethereum while executing them on its own chain. Developers interact with it through an EVM-compatible JSON-RPC endpoint, which means most Ethereum tooling works with only a chain ID and RPC URL change. This article explains what Base is, how it relates to Ethereum, and how to connect to it reliably.

You will find chain settings, a working connection example, and practical guidance on choosing between the public endpoint and managed or dedicated node infrastructure. The goal is to help you decide how to wire Base into your stack and what to check before moving to production.

Question 12

Solana Devnet RPC: Endpoint Settings, Airdrops, and Debugging

Accepted Answer

Solana devnet is the testing cluster where you validate programs, transactions, and client code before touching mainnet. This page explains how to connect a Solana devnet RPC endpoint, how to get test SOL, and how to debug the failures that show up most often during development.

It also covers when a public devnet endpoint is enough and when a managed or dedicated RPC service such as OnFinality is the better fit for CI pipelines, integration tests, and pre-release staging.

API Service

Dedicated Nodes

Enterprise Nodes

Indexer Services

Network Prototyping Tools

Staking & Validators

AI Agent

RPC documentation entries

What Does Bittensor Subnet Registration Cost in 2025?

What is a Binance Smart Chain archive node and when do you need one?

Celo API Access: Chain Settings, Methods, and Failure Modes

TON API Keys: How Do You Get One and When Do You Need It?

What Is a Solana Devnet Address and How Do You Use One?

Polygon Mainnet RPC: How Do You Connect to Chain ID 137?

What should I know about Polygon PoS endpoints?

Which Solana RPC services offer enhanced APIs tailored for NFT and DeFi data?

How do Solana NFT API providers handle scalability and low-latency data retrieval?

What is the Binance Beacon Chain explorer and how do you query it?

Base L2 on Ethereum: How to Connect and When to Use It

Solana Devnet RPC: Endpoint Settings, Airdrops, and Debugging

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources

OnFinality RPC Assistant

RPC documentation entries

What Does Bittensor Subnet Registration Cost in 2025?

What is a Binance Smart Chain archive node and when do you need one?

Celo API Access: Chain Settings, Methods, and Failure Modes

TON API Keys: How Do You Get One and When Do You Need It?

What Is a Solana Devnet Address and How Do You Use One?

Polygon Mainnet RPC: How Do You Connect to Chain ID 137?

What should I know about Polygon PoS endpoints?

Which Solana RPC services offer enhanced APIs tailored for NFT and DeFi data?

How do Solana NFT API providers handle scalability and low-latency data retrieval?

What is the Binance Beacon Chain explorer and how do you query it?

Base L2 on Ethereum: How to Connect and When to Use It

Solana Devnet RPC: Endpoint Settings, Airdrops, and Debugging

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources