Blockchain and Web3 is a deep vertical in the catalog — 236 providers, 1,097 APIs — and its structure is unusually clean, because the domain naturally splits into a few well-defined layers: the infrastructure that runs the chains, the exchanges that trade the assets, the chains themselves, and the compliance layer watching all of it.
The bands
| Band | What it does | Providers on apis.io |
|---|---|---|
| Node & RPC infrastructure | Managed chain access | Chainstack (26 APIs), Blockdaemon (11) |
| Exchanges & trading | Order books, swaps | Binance (21), 1inch (15), Kraken (14) |
| L1s & L2s | The chains themselves | Monad (12), Ronin (11), Linea (10) |
| Compliance & marketplaces | Analytics, NFTs | Chainalysis (12), OpenSea (12) |
What’s shifted recently
- Infrastructure abstracted the multi-chain problem. Chainstack’s 26 APIs are almost all one-node-API-per-chain — you provision through one control plane and talk to 70-plus protocols through their individual RPC surfaces. That “run every chain so builders don’t have to” model is now the backbone of Web3 development.
- New chains show up in the catalog fast. The appearance of Monad, Hyperliquid, and other newer protocols as their own node APIs is a live signal of where developer attention is moving — the catalog surfaces chain traction before the headlines do.
- Compliance grew into a first-class layer. Chainalysis and peers turned on-chain analytics and sanctions screening into APIs, because institutional adoption made “who is this wallet” a required question. The compliance surface is now as much a part of the stack as the RPC.
Where to start
- The Blockchain and Web3 industry page ranks all 236 providers.
- For multi-chain infrastructure, study Chainstack.
- For the trading layer, compare Binance, Kraken, and the DEX aggregator 1inch.
The takeaway
Web3’s 1,097 APIs are noisy, but the catalog imposes a legible structure on them: infrastructure at the base, exchanges and chains in the middle, compliance wrapping the whole thing. Read the node-infrastructure band as the foundation everything else sits on, and read the newest chain APIs as an early-warning system for where the ecosystem is headed next.