Most developers underestimate the data problem until it’s too late.
You’ve built the logic. The strategy is solid. The architecture makes sense. Then you connect a price feed and realize it’s cached. Or that the token you need isn’t listed. Or that you’re paying $99/month for a provider that covers 80% of what you actually need — and the missing 20% is exactly the part that matters.
The onchain data layer is where crypto products quietly break.
If you’re:
- building a trading bot that needs to react in seconds, not minutes,
- designing a wallet dashboard that tracks PnL across multiple chains,
- or shipping a DeFi tool that depends on newly listed tokens,
the provider you choose will define how far you can go before hitting a wall.
The problem isn’t that good APIs don’t exist. The problem is that most comparisons treat them as interchangeable — as if “blockchain data API” means the same thing regardless of what you’re building.
It doesn’t.
An indexer optimized for historical compliance data is a completely different product from a real-time trading infrastructure layer. A decentralized protocol built for protocol-specific subgraphs solves a different problem than a multi-chain wallet analytics API. Choosing the wrong one doesn’t mean your product fails immediately — it means you hit the ceiling at exactly the wrong moment.
This guide cuts through that.
We compare five of the best onchain data APIs available to developers in 2026 — Mobula, Moralis, Bitquery, The Graph, and GoldRush (Covalent) — focusing on features, data coverage, pricing, free tiers, and what each one is actually built for.
By the end, you’ll know which one fits your stack.
Overview of the Top 5 Onchain Data API Providers
1. Mobula — Real-Time Onchain Data + Execution in One Platform
Mobula is the only provider on this list that combines a real-time data layer with a built-in execution layer. You can fetch live prices, stream wallet activity, and route onchain swaps through the same API — no second provider needed.
At the core is the Octopus engine: a multi-chain, composable pricing system that aggregates prices using volume weighting and liquidity ponderation directly from DEX pools. It covers everything from Bitcoin and Ethereum down to tokens listed on obscure DEXs in the last hour, with prices refreshing every 5 seconds and no caching on any tier — including free.
Data Coverage and Features
Mobula’s API surface is wide. The platform exposes 50+ REST endpoints and 10+ real-time WebSocket streams, covering:
- Live token prices, 24h change, volume, and market cap for any asset on any supported chain
- OHLCV historical data for backtesting and charting
- Wallet portfolio analytics: balances, historical PnL, DeFi positions, NFT holdings, and wallet labels across chains
- Pair-level and pool-level data: trades, liquidity, pool creation, newly listed tokens
- Token security checks and holder distribution
- Execution layer: swap quotes and onchain trade routing via a single API call
All of this is accessible via REST, WebSocket streams, a TypeScript SDK, and a GraphQL interface. Response times are low, and the team responds to support queries in under an hour across Telegram, Slack, and Discord.
Beyond standard data retrieval, the Octopus engine specifically handles what most providers fail at: long-tail tokens. New listings on any DEX, low-liquidity assets, freshly deployed contracts — the engine picks them up as soon as they have trading activity. That’s the coverage gap that matters most to builders working at the edge of the market.
Chain Coverage
Ethereum, Solana, BNB Chain, Base, Arbitrum, Optimism, Polygon, Avalanche, and many others. Multi-chain wallet queries aggregate across all supported networks in a single call.
Pricing and Limits
Mobula offers a free API key with immediate access to the full endpoint suite, including no-cache pricing. No credit card required to start. The free tier is production-testable, not just a sandbox.
Paid plans scale with usage through the Mobula dashboard, with pricing based on request volume rather than a flat monthly subscription. For teams running lean bots or early-stage apps, this model is significantly more cost-efficient than paying $49–$99/month flat for features you don’t fully use. Enterprise and custom plans are available via Telegram or email.
Pros
- No-cache 5-second price refresh on all tiers, including free
- Data + execution in one API — fetch price and route the swap without switching providers
- Broadest long-tail token coverage via the Octopus aggregation engine
- Full wallet analytics stack: PnL, DeFi positions, NFT holdings, wallet labels
- REST + WebSocket + TypeScript SDK + GraphQL — developer-first from day one
- Sub-1h support response time
Cons
- Requires coding — no visual interface or no-code builder
- Execution layer is newer than the data layer
- Smaller community than Moralis or The Graph
Best for: Developers building trading bots, price aggregators, wallet dashboards, or any product that needs real-time onchain data and the ability to act on it — from a single provider.
👉 Get your free Mobula API key
2. Moralis — Enterprise-Grade Web3 Backend Infrastructure
Moralis is the most complete Web3 backend platform on this list. It started as a Firebase-for-blockchain and has evolved into a full-stack data infrastructure layer trusted by MetaMask, Blockchain.com, and hundreds of production applications processing billions of API requests per month.
Data Coverage and Features
The platform covers multiple distinct product lines:
- Data APIs: token prices, wallet history, NFT metadata, DeFi positions, token holders, swap data
- Streams API: real-time blockchain event monitoring for any wallet, contract, or address — with a 100% delivery guarantee and webhook delivery
- Datashare: bulk export of blockchain datasets to Snowflake, BigQuery, and S3 for data warehousing and AI pipelines
- Cortex API: an AI-native, LLM-ready crypto data layer for building onchain AI agents
Moralis uses a Compute Units (CUs) pricing model. Every API request consumes a different number of CUs depending on complexity — a simple token balance check costs fewer CUs than a multi-chain portfolio aggregation. This makes cost predictable for simple use cases but can become opaque for complex, high-frequency workloads.
The Streams API deserves special attention. If your product needs to react the moment a wallet receives a token, a smart contract emits an event, or a liquidation threshold is crossed — Moralis Streams handles it reliably at scale with a 100% delivery guarantee.
Chain Coverage
Ethereum, Solana, BNB Chain, Base, Polygon, Avalanche, Arbitrum, Optimism, and many more EVM-compatible chains. One of the broadest EVM + Solana coverage sets among centralized providers.
Pricing and Limits
Moralis offers a free Starter plan with limited CUs per month — enough to prototype and test. Paid plans start at approximately $49/month and scale to $199/month for higher CU allowances, premium endpoints, and auto-scaling. Enterprise plans with SOC 2 Type II compliance and ISO 27001 certification are available for institutional teams.
The CU model means cost scales with query complexity and volume. Simple, high-volume use cases will find it efficient. Complex multi-chain aggregations may see costs rise faster than expected.
Pros
- Streams API: 100% delivery guarantee for real-time event monitoring
- Broadest EVM + Solana coverage among enterprise providers
- SOC 2 Type II and ISO 27001 certified — relevant for regulated or institutional use
- Cortex AI layer for LLM-ready data pipelines
- Trusted by MetaMask, Blockchain.com, and other large-scale apps
Cons
- CU pricing can be unpredictable for complex or high-frequency workloads
- No built-in execution layer
- Higher entry price for serious production use
Best for: Teams building production-grade dApps, portfolio trackers, AI agents, or compliance tools that need enterprise reliability and event-driven architecture.
3. Bitquery — Deep Blockchain Analytics via GraphQL and Kafka
Bitquery is the go-to choice when you need granular, custom queries across 40+ blockchains. Its GraphQL API lets you filter, aggregate, and stream data at a depth that REST-based APIs simply don’t expose. Since July 2025 it also offers a dedicated multi-chain Price Index API and Kafka streams for ultra-high-throughput pipelines.
Data Coverage and Features
Bitquery’s strength is flexibility. Using its GraphQL interface, developers can query:
- Real-time and historical DEX trade data across all supported chains
- Token prices via the Price Index: OHLCV, SMA, WMA, EMA, cross-chain and cross-DEX aggregations at 1-second granularity
- Wallet transactions, token transfers, internal calls, and failed transactions
- Mempool data — useful for MEV detection, front-running analysis, and liquidation bots
- NFT trades, smart contract events, and protocol-level analytics
- Kafka streams and WebSocket subscriptions
The downside: GraphQL has a learning curve. Writing efficient queries requires understanding the schema, and building complex data pipelines takes significantly more setup time than calling a REST endpoint.
Chain Coverage
40+ chains including Ethereum, BNB Chain, Solana, Polygon, Arbitrum, Bitcoin (non-EVM), and Tron. One of the widest chain selections among specialized analytics providers.
Pricing and Limits
Bitquery uses a points-based pricing system where queries consume points based on infrastructure resource usage. A free community tier is available for development and light use. Paid plans are usage-based and customized through the sales team — no publicly listed flat-rate tiers for production. Academic access is available for free.
Pros
- 40+ chains including non-EVM networks like Bitcoin
- 1-second price granularity via Kafka streams
- Mempool data access — rare among providers, critical for MEV research
- Extremely flexible querying: aggregations, filters, cross-chain joins in one call
- OHLCV + SMA + WMA + EMA pre-calculated in the Price Index
Cons
- Steep GraphQL learning curve — not beginner-friendly
- Pricing is opaque: no clear public flat-rate tiers, requires sales contact
- No execution layer
Best for: Blockchain analytics, MEV research, algorithmic trading requiring tick-level data, compliance tools, and deeply customized cross-chain queries.
4. The Graph — Decentralized Indexing Protocol
The Graph takes a fundamentally different architectural approach. Rather than a centralized API, it’s a decentralized protocol where developers deploy subgraphs — custom indexing schemas tied to specific smart contracts. Query fees are paid in GRT tokens to a network of indexers.
Data Coverage and Features
The value of The Graph depends on what subgraphs already exist. For major DeFi protocols — Uniswap, Aave, Compound, Curve, Balancer — there are well-maintained, community-curated subgraphs that deliver highly efficient, protocol-specific data with minimal latency.
For anything outside supported protocols, developers must build their own subgraph: define a schema, write mapping logic, and deploy to the decentralized network. Significant setup overhead, and requires solid technical depth.
What it doesn’t offer: broad cross-protocol coverage out of the box, real-time price feeds for arbitrary tokens, wallet-level analytics, or any execution capability.
Chain Coverage
Primarily EVM chains: Ethereum, Arbitrum, Optimism, Polygon, Base, Avalanche, Gnosis, and others. Limited non-EVM support.
Pricing and Limits
The Graph uses a token-economic model where consumers pay GRT for queries. Costs vary based on query complexity and indexer competition. No flat monthly fee — costs scale directly with usage. The Graph Foundation offers grants and subsidies for public good infrastructure projects.
Pros
- Censorship-resistant and decentralized — no vendor dependency
- Highly efficient for protocol-specific indexed data
- Large library of existing subgraphs for major DeFi protocols
- Open source — full visibility into data pipelines
- No vendor lock-in
Cons
- Significant setup overhead for custom subgraphs
- Not suitable for real-time arbitrary token price feeds
- No wallet-level analytics or cross-protocol coverage out of the box
- GRT costs are less predictable than flat subscriptions
- No execution layer
Best for: dApp developers building on specific, well-supported DeFi protocols who need reliable, decentralized, protocol-specific indexed data.
5. GoldRush (Covalent) — Historical Depth Across 100+ Chains
GoldRush, the rebranded product from Covalent, specializes in structured historical onchain data with a clean, standardized REST interface. It covers 100+ blockchains — the broadest chain support of any provider on this list — and delivers every endpoint in a consistent schema.
Data Coverage and Features
GoldRush focuses on making historical blockchain data accessible and structured:
- Full transaction history for any wallet address across all supported chains
- Token balances and portfolio snapshots at any block height
- NFT metadata, floor prices, and ownership history
- Token approval tracking — useful for security audits and revoke tools
- DEX liquidity and swap data
- A terminal-first interface for developers and AI agents to query data without writing code
Particularly strong for audit-grade historical accuracy: compliance tools, tax reporting, portfolio analytics, and any product that needs to reconstruct wallet state at an arbitrary point in the past.
What GoldRush is not built for: real-time price feeds for active trading. Data freshness is not its focus.
Chain Coverage
100+ chains including Ethereum, BNB Chain, Polygon, Avalanche, Base, Optimism, Arbitrum, and a large number of smaller EVM-compatible networks. The widest chain support on this list.
Pricing and Limits
GoldRush offers a 14-day free trial with 25,000 API credits and access to all APIs. After the trial:
- Vibe Coding: $10/month — 10,000 credits, community Discord support, full historical data. For indie developers and hobby projects.
- Professional: $250/month — 300,000 credits, auto-scaling, production-grade performance.
- Inner Circle (Enterprise): Custom pricing — dedicated support, SLAs, NDAs.
The credit model is transparent: each API call costs a defined number of credits. No opaque compute unit calculations.
Pros
- 100+ chains — the widest coverage on this list
- Consistent REST schema across all chains — one integration pattern for everything
- Strong historical depth: full transaction history at any block height
- Transparent, predictable credit-based pricing
- Terminal-first interface for AI agents and developer tooling
Cons
- Not optimized for real-time price feeds or trading use cases
- No execution layer
- Significant pricing gap between $10 and $250 tiers
Best for: Portfolio trackers, compliance and audit tools, tax reporting platforms, and products that need structured historical onchain data across a wide range of chains.
Ready to Build with Onchain Data That Moves at Market Speed?
If you want real-time token prices with no caching, multi-chain wallet analytics, and the ability to execute swaps — all from a single provider, without stitching together three different APIs — Mobula is the practical pick.
Why Mobula wins for most developer teams:
- All-in-one: data + execution in one API — no second provider for swap routing
- Honest refresh rate: 5-second no-cache pricing on every tier, including free
- Long-tail coverage: Octopus engine tracks any token the moment it has liquidity
- Developer-first: REST + WebSocket + TypeScript SDK + GraphQL, sub-1h support
- Start free: full API access, no credit card, no sandbox limitations
What you can ship this week:
- Live price monitors for any token across any supported chain
- Multi-wallet PnL dashboards with historical balance tracking
- Bot triggers based on real-time price thresholds
- Swap execution flows without switching providers
👉 Start for free with Mobula — grab your API key and make your first request in minutes.
FAQs
❓ What is the best onchain data API for building a crypto trading bot? ✅ Mobula is the strongest option for trading bots. It provides real-time prices with 5-second no-cache refresh, covers long-tail tokens via the Octopus engine, and includes a swap execution layer — all from a single REST API. Most other providers require combining a data API with a separate execution provider, which adds latency and complexity.
❓ Which onchain API has the best free tier? ✅ Mobula offers a free API key with immediate access to the full endpoint suite including no-cache pricing — no credit card required. GoldRush offers a 14-day free trial with 25,000 credits. Moralis has a free Starter plan with limited CUs. Bitquery provides a free community tier with limited daily query allowances.
❓ What is the difference between an onchain data API and a blockchain RPC node? ✅ A blockchain RPC node gives you raw access to chain state — but you need to parse and index everything yourself. An onchain data API does that indexing and aggregation for you, delivering structured, application-ready data through clean endpoints. For most product teams, onchain data APIs are significantly faster to integrate and easier to scale.
❓ Which onchain API covers the most chains? ✅ GoldRush (Covalent) leads with 100+ supported chains. Bitquery covers 40+ chains including non-EVM networks like Bitcoin. Mobula and Moralis focus on the most-used chains with deep per-chain coverage rather than maximum breadth.
❓ Can I use an onchain data API without coding experience? ✅ Most providers require development knowledge. Moralis is the most accessible for Web3 newcomers. GoldRush offers a terminal interface for AI agents and non-coders. For production bot-building or custom analytics, you will need to write code regardless of provider.
Onchain data is infrastructure. The provider you choose defines your latency, your coverage, and your cost structure as you scale.
The ceiling you hit six months from now is the decision you make today.
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5 Best Onchain Data APIs for Developers in 2026 was originally published in Coinmonks on Medium, where people are continuing the conversation by highlighting and responding to this story.
