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A blockchain API is the contract between your product and a chain. It decides what you can read, how fast, and at what price. Every balance screen, trading bot, and agent lives inside that contract.
CoinNewsSpan’s guide to the best crypto APIs covered the market-data layer. This review goes one layer down. Nodes, explorers, indexers, oracles, and execution venues. Then the data APIs that sit on top of them. Twelve providers in total, compared by layer, free tier, price, and rate limit. Every figure was checked against provider documentation in October 2026.
TL;DR
Blockchain APIs are not one category. They are five layers stacked on top of each other. Picking the wrong layer costs more than picking the wrong vendor.
Most production stacks use two layers. A data API draws the screen. A node or execution API does the thing the product is about.
| Provider | Layer | Free tier | First paid tier | Delivery | MCP server |
|---|---|---|---|---|---|
| CoinStats API | All-in-one data | 20,000 credits a month, 2 RPS, commercial use | $49 a month, 1M credits | REST | Yes |
| Codex | Real-time token data | 10,000 requests a month, 5 RPS, $1 activation | $350 a month, 1M requests | GraphQL, WebSocket, webhooks | Yes |
| GetBlock | Nodes and RPC | 50,000 compute units a day, 20 RPS | $49 a month, 90M units | JSON-RPC, REST, WebSocket, gRPC | Docs server plus open source |
| Etherscan API | Explorer data | 100,000 calls a day, 3 calls a second | $49 a month, 5 calls a second | REST | Yes |
| Blockscout | Explorer data | 100K credits a day, 5 RPS, 100+ chains | $49 a month, 100M credits | REST, JSON-RPC | Yes |
| The Graph | Indexing | 100,000 queries a month | $2 per 100,000 queries | GraphQL | Open source |
| DefiLlama | DeFi metrics | Open endpoints, no key | $250 a month, 1M calls | REST | On paid plan |
| Dune | Analytics | 14-day trial, 2,500 credits | $75 a month, 4,000 credits | REST, SDKs | Yes |
| Chainlink Data Feeds | Oracles | On-chain reads, no key | Data Streams, subscription on request | On-chain, REST, WebSocket | Beta |
| Jupiter API | Execution, Solana | 1 RPS with a key, unlimited credits | $25 a month, 10 RPS | REST | No |
| 0x Swap API | Execution, EVM | None published | $1,000 a month, about 5 RPS | REST | Docs search |
| Hyperliquid API | Onchain exchange | Public endpoint, 1,200 weight per minute | No plans | REST, WebSocket | No |
Free tiers verified against provider pages in October 2026. Where a provider meters in credits, the entry states a standard call’s cost.
Free tiers are not comparable on their face. Three meter in credits and three in requests or queries. One uses compute units, and one uses request weight. Jupiter caps rate only. Two need no key at all, and 0x publishes nothing.
The useful question is what a free tier buys in real calls. On CoinStats API, 20,000 credits is 20,000 price calls or 500 wallet balance reads. On Blockscout, 100K daily credits is about 5,000 standard calls. On GetBlock, 50,000 daily units cover thousands of light reads. Archive calls eat it faster.
Three tiers deserve a flag. Dune’s free access went view-only on September 10, 2026. Codex charges a one-time $1 activation. 0x publishes no free plan at all.
Four providers meet at $49 a month. The plans behind that price differ a lot. GetBlock gives 90 million units at 250 RPS. CoinStats API gives 1 million weighted credits at 30 RPS. Blockscout gives 100 million credits at 15 RPS. Etherscan gives 5 calls a second.
The outliers tell the rest of the story. Jupiter starts at $25. The Graph bills per 100,000 queries with no subscription. 0x starts at $1,000 because execution is priced on flow, not on reads.
CoinStats crypto API is the best blockchain API for balance, history, and position screens. Its free tier gives 20,000 credits a month, commercial use included.
Most crypto products stitch four providers together. A node for balances, a price feed, a DeFi aggregator, and a transaction parser. CoinStats API collapses that stack into one key. Pass a wallet address and get token balances back, priced in USD. Transaction history comes back classified. DeFi positions resolve across 10,000+ protocols with no protocol-by-protocol setup.
Coverage runs to 120+ blockchains, 74 of them EVM. Bitcoin support includes xpub, ypub, and zpub keys. A whole HD wallet resolves from one key. Most wallets in CoinNewsSpan’s Bitcoin wallet guide can export one.
Market data covers 100,000+ coins and 200+ exchanges. The Token Risks endpoint scores EVM token contracts from 0 to 100. It flags honeypots, hidden fees, and upgradeable proxies before a swap.
The same data reaches AI agents through an MCP Server with 20+ tools. Agents can also skip signup and pay per call in USDC through x402. The infrastructure powers the CoinStats app, used by 1M+ people every month.
Pricing is credit-based and weighted by endpoint. A price call costs 1 to 2 credits. A wallet balance costs 40, a transaction sync 30, and a DeFi read 400. Starter is $49 a month for 1,000,000 credits at 30 requests per second. Pro is $199 for 5,000,000, and Business is $999 for 80,000,000.
Pros
Cons
Best for: Any crypto product requiring market data, wallet balances, DeFi positions, portfolio analytics, and token security under one key.
Codex is the best blockchain API for real-time DEX and token data. The free plan gives 10,000 requests a month at sub-second freshness.
Codex is an enriched blockchain data API built on two pillars: tokens and prediction markets. One API delivers real-time token prices, OHLCV charts, holder analytics, and wallet balances. Coverage spans 106M+ tokens and 80+ networks. Prediction-market events, odds, and trader analytics arrive through the same schema. Polymarket and Kalshi are both covered.
Delivery is where it separates from the pack. GraphQL for queries and WebSocket subscriptions for live feeds. Webhooks push price moves and pair events. A TypeScript SDK, an MCP server, and MPP agentic payments cover the AI side. The site reports 10B+ API requests a month at 1,000+ requests a second.
The scope is on-chain data, not a full wallet stack. Codex does not cover Bitcoin or centralized-exchange balances. It does not decode DeFi positions such as LP tokens. Pair it with a portfolio layer for those.
The Almost Free plan gives 10,000 requests a month at 5 requests per second. A one-time $1 activation applies. It covers 4 of 15 endpoint groups. Growth is $350 a month for 1,000,000 requests at 300 requests per second. It adds WebSockets and webhooks. Overage is billed at the plan rate.
Pros
Cons
Best for: Trading terminals, token screeners, and bots that need live DEX data.
GetBlock is the best blockchain API for raw node access. Its catalog lists 130+ chains. The free plan gives 50,000 compute units a day.
GetBlock sells the layer under everything else. Dedicated nodes cover more networks than the shared endpoints do. Access runs over JSON-RPC, REST, WebSocket, GraphQL, and Yellowstone gRPC on Solana. A shared endpoint goes live 30 seconds after signup.
This is direct chain access, not interpretation. You decode the responses yourself. That is the point for archive reads, tracing, and transaction broadcast. Three extras widen the scope. EVM Data Streams push 15 event topics over WebSocket.
A Blockbook API, included at no extra cost, serves Bitcoin balances, histories, and xpubs. StreamFirst and LandFirst, sold with dedicated Solana nodes, speed up reads and transaction landing.
GetBlock completed SOC 2 Type II in June 2026. Its case studies show dedicated clusters for Tangem and Trust Wallet. Its blog also compares the crypto swap exchanges that wallets like these route through. AI tooling covers a documentation MCP server and an open-source RPC server.
Shared plans are metered in compute units. Free covers 50,000 units a day at 20 requests per second. Two access tokens come with it. Starter is $49 a month, or $39 billed annually. That buys 90 million units at 250 requests per second. Plans scale to $699 for 1.6 billion units. Dedicated nodes start at $1,000 a month with unlimited requests.
Pros
Cons
Best for: Wallets, indexers, and bots that need raw chain access across many networks.
Etherscan API is the best blockchain API for verified contract data on EVM chains. The free tier allows 100,000 calls a day.
Etherscan is where EVM developers already go to read a transaction. The API exposes the same data. Balances, transaction lists, token transfers, logs, verified source code, and ABIs. The V2 API runs one key across 60+ chains. A multichain app switches by chain ID.
The free tier allows 3 calls per second and 100,000 calls a day. Lite is $49 a month for 5 calls per second on every chain. Standard is $199 for 10 calls per second and 200,000 calls a day. Most listed networks are free on that tier. A few newer chains sit behind paid plans.
Etherscan shipped its AI layer on August 31, 2026. A hosted MCP server exposes 21 tools and a keyless server exposes 16. A CLI with skills rounds it out.
Pros
Cons
Best for: Contract tooling, audits, and EVM dashboards that need verified data.
Blockscout is the best free blockchain explorer API. It gives 100K credits a day across 100+ chains on one key.
Blockscout is the open-source explorer behind hundreds of EVM networks. Its PRO API puts all of them behind one key and one route shape. Swap the chain ID to move between chains. The data is the same decoded output that powers the explorers. Transfers, logs, internal transactions, token holders, and verified contracts.
The route format mirrors Etherscan’s V2 API on purpose. A migration guide maps parameters endpoint by endpoint. Keys are now required on every PRO tier, including the free tier. Per-instance explorer hosts sit behind bot protection. They are being retired for programmatic use.
The free tier allows 5 requests per second and 100K credits a day. A standard call costs 20 credits, so that is about 5,000 calls a day. Builder is $49 a month for 100 million credits at 15 RPS. Pro is $199 for 500 million at 30 RPS. Business is $999 for 3 billion at 50 RPS. Blockscout also runs an MCP server for agents.
Pros
Cons
Best for: Multichain dashboards and tools on chains outside the big five.
The Graph is the best blockchain API for custom indexing. The first 100,000 queries a month are free, then usage pricing applies.
The Graph turns raw chain events into queryable entities. You define a subgraph and the network indexes it. Your app queries it over GraphQL. Thousands of protocols publish subgraphs. DeFi and NFT data is often one query away.
The network reports 1.27 trillion+ queries served, 75,000+ projects, and 60+ networks. Substreams add streaming pipelines for high-throughput indexing. A Token API, operated by Pinax, serves balances and transfers without writing a subgraph. An open-source Subgraph MCP server lets agents query the network.
Pricing is pure usage. The first 100,000 queries a month are free. After that, queries cost $2 per 100,000, payable by card or in GRT. There is no subscription to pick.
Pros
Cons
Best for: dApps that need their own indexed view of contract activity.
DefiLlama is the best blockchain API for protocol-level DeFi data. Its open endpoints need no key.
DefiLlama is the reference for TVL, yields, fees, and stablecoin supply. CoinNewsSpan’s piece on why stablecoins anchor DeFi liquidity covers that last metric. Its open API serves those metrics across 8,700+ protocols and 400+ chains. On October 17, 2026, it tracked about $89 billion in total DeFi value locked. Nobody reconciles protocol data at that breadth for free.
The free endpoints have no key and no sign-up. The API plan is $250 a month, or $3,000 a year. It covers 1 million calls at 1,000 requests a minute. It unlocks premium endpoints and the hosted MCP server. Overage runs $0.60 per 1,000 calls.
The scope is protocols, not wallets. DefiLlama tells you a pool’s TVL and yield. It does not tell you what one address holds in that pool. DefiLlama also ranks among the best DeFi APIs in CoinStats’ own guide. That guide pairs it with per-wallet position data.
Pros
Cons
Best for: DeFi dashboards, yield trackers, and research tools.
Dune is the best blockchain API for SQL-shaped analytics. Decoded tables cover 100+ chains on paid plans.
Dune indexes raw and decoded blockchain data into tables you query with SQL. The API runs saved queries or raw SQL and returns results to your pipeline. Official SDKs cover Python, TypeScript, and Go. An MCP server and a CLI expose the same queries to agents.
The 2026 change matters. Free access went view-only on September 10, 2026. No credits, no API. New accounts get a 14-day trial with Plus features and 2,500 credits. Analyst is $75 a month, or $65 billed annually, for 4,000 credits. Plus is $399 a month, or $349 billed annually, for 25,000 credits. Credits scale with the compute a query uses.
Pros
Cons
Best for: Research products, dashboards, and reporting pipelines.
Chainlink Data Feeds is the best blockchain API for prices contracts settle on. Onchain reads are free and need no key.
Data Feeds are not a REST endpoint for your backend. They are oracle networks that publish reference prices onchain. A contract reads the latest answer in one call. Aave is among the protocols that settle on them. DefiLlama showed about $35.7 billion in total value secured on October 18, 2026. That is first among oracles.
For latency-sensitive DeFi, there is Data Streams. Signed reports arrive off-chain over REST and WebSocket. A contract verifies each one inside the transaction. Streams are subscription-only, with pricing on request and no free tier. Chainlink for Agents entered beta in August 2026. It lets agents pay per call in USDC on Base. CoinNewsSpan tracks these rollouts in its Chainlink news feed.
Pros
Cons
Best for: DeFi protocols where a wrong price is an exploit.
Jupiter API is the best blockchain API for Solana swaps. The free tier runs at 1 request per second. Execute calls cost zero credits.
Jupiter routes most of Solana’s aggregated swap volume. DefiLlama showed about $14 billion in 30-day aggregator volume on October 18, 2026. The Developer Platform exposes that router over REST on one key. Swap V2, Price, and Tokens cover the basics. Trigger handles limit orders, and Recurring handles DCA. Perps, Lend, and Prediction endpoints round it out.
The pricing is the friendliest in this review. Keyless requests run at 0.5 RPS. A free key lifts that to 1 RPS with unlimited credits. Developer is $25 a month for 10 RPS and 25 million credits. Launch is $100 for 50 RPS, and Pro is $500 for 150 RPS. Execute endpoints cost zero credits on every plan.
The API returns unsigned transactions. You sign locally and submit. Jupiter never holds keys.
Pros
Cons
Best for: Solana wallets, bots, and agents that need routed swaps.
0x Swap API is the best blockchain API for EVM swap execution. It aggregates 370+ liquidity sources with gasless and cross-chain options.
0x aggregates liquidity across EVM chains, with Solana in beta and cross-chain routes. The Swap API returns a quote and an unsigned transaction. Gasless lets users trade without holding the native token. Trade Analytics reports what settled. The site cites $200 billion+ settled across 211 million+ transactions and 521+ projects.
Pricing changed shape in 2026. 0x publishes one self-serve plan, Standard, at $1,000 a month. Yearly billing takes 20% off. It allows about 5 requests per second. On Standard, 0x earns a 0.15% fee on select pairs and collects trade surplus. Integrators can add their own fee of up to 10%. Custom plans add RFQ liquidity and volume discounts.
The documentation warns that quoting without trading hits limits fast. This is an execution API, not a price feed.
Pros
Cons
Best for: Wallets and trading apps that embed EVM swaps and earn on them.
Hyperliquid API is the best blockchain API for on-chain perpetuals. The info endpoint is public, and there are no API plans at all.
Hyperliquid runs a perps and spot exchange on its own L1. It competes with the venues in CoinNewsSpan’s guide to the best crypto exchanges. The API exposes the order book, trades, candles, funding, and account state. Delivery is REST and WebSocket. The info endpoint needs no key. Trading uses signed requests from your own wallet. An official Python SDK covers both.
The scale is real. Hyperliquid handled about 32.8% of 30-day on-chain perps volume in early October 2026. That is DefiLlama’s count. HIP-3 lets builders deploy their own perp markets on the chain.
There are no plans and no monthly bill. Info requests are limited to 1,200 request weight per minute per IP. Most calls weigh 20, so that is about 60 a minute. Order book snapshots weigh 2. Trading actions earn capacity with volume. The rule is 1 action per 1 USDC traded, after a 10,000 buffer.
Pros
Cons
Best for: Perps bots, terminals, and market-making on one venue.
| If you are building | Start with | Pair it with |
|---|---|---|
| Portfolio tracker or wallet | CoinStats API | GetBlock, if you broadcast transactions |
| Token screener or trading terminal | Codex | CoinStats API, for balances and P&L |
| dApp backend | GetBlock | The Graph or Blockscout, for decoded data |
| Contract tooling or audit product | Etherscan API | Blockscout, for long-tail chains |
| DeFi dashboard or yield tracker | DefiLlama | CoinStats API, for per-wallet positions |
| Research or reporting pipeline | Dune | DefiLlama |
| Lending or perps protocol | Chainlink Data Feeds | GetBlock, for your own node path |
| Solana swap feature | Jupiter API | Codex, for token data |
| EVM swap feature | 0x Swap API | CoinStats API, for the portfolio screen |
| Perps bot | Hyperliquid API | Codex, for cross-venue prices |
| AI agent | CoinStats API | Codex or Etherscan API |
Two providers are the normal shape. One broad data API covers what the interface renders. One specialist covers what the product is about. The pairing also gives you a fallback when one feed stalls. For the protocols those dashboards show, CoinNewsSpan’s DeFi news desk is the running record.
One request shows the difference between layers best. Show a wallet’s holdings.
At the node layer, you call the native balance, then each token contract. Token balances live in their own contracts under the ERC-20 standard. Then you price every result yourself.
At the explorer layer, you get a decoded token list per chain, still unpriced. At the data layer, one call returns every chain, priced in USD. The node is the cheapest per call and the most expensive per feature. Pick the layer by how much of that work you want to own.
The direction is consistent. Free API access is narrowing at the analytics layer. It is widening at the data and node layers. Agent access is now table stakes. Ten of the twelve ship some form of MCP server. Postman’s 2025 State of the API report put that at 24% of developers.
A blockchain API is a hosted interface for chain data and chain actions. It replaces running your own node and indexer. Depending on the layer, it returns raw state, decoded events, or priced balances. Oracle prices and executable transactions are layers too.
It depends on the layer your product needs. CoinStats API covers the most jobs under one key. GetBlock has the widest node catalog. Codex is the fastest for token data. Jupiter and 0x handle execution.
Ten of the twelve offer free access of some kind. CoinStats API gives 20,000 credits a month with commercial use. Blockscout gives 100K credits a day. GetBlock gives 50,000 compute units a day. DefiLlama and Chainlink Data Feeds need no key at all.
Only if your product sends transactions. A data API reads balances, history, and positions. A node broadcasts what you sign. Many products run both.
Ten of the twelve ship an MCP server in some form. CoinStats API, Codex, Etherscan API, Blockscout, and Dune run hosted servers. The Graph publishes an open-source one. GetBlock, DefiLlama, Chainlink, and 0x offer partial or paid access.
Entry plans run from $25 a month on Jupiter to $1,000 on 0x. Four providers start at $49. The Graph bills $2 per 100,000 queries with no subscription. Hyperliquid has no plans at all.
Sometimes. CoinStats API allows commercial use on its free tier. Other providers restrict redistribution by endpoint or plan. Read the licence for the exact dataset you will display.
Start with the layer, not the logo. A portfolio product lives at the data layer. A protocol lives at the node and oracle layers. A trading product lives at execution. Most teams end up with one pick from two of those.
Prices and limits above were checked in October 2026 and will move. Recheck the pricing page before a production decision. The user side of these products lives in CoinNewsSpan’s crypto guides. CoinNewsSpan’s crypto API comparison covers the market-data side of the stack. Those providers were left out here on purpose.
