Trading bots and AI agents run on data. A bot needs prices, wallet context, and execution rails. An agent needs the same data exposed as callable tools. Nearly all of it arrives through APIs.
But no single API covers every automated workload. A signal bot needs fast aggregated prices. A portfolio-aware agent needs wallet and DeFi context. A rebalancing bot needs to convert assets without exchange accounts. Most production systems combine a data layer with an execution rail.
This guide breaks down five APIs built for those workloads. We skipped CoinMarketCap and CoinGecko intentionally. Neither adds the wallet, DeFi, or portfolio context that agent workloads need. Our developer deep dive on top crypto APIs covers general-purpose providers in depth.
What you'll learn 👉
What Bots and Agents Need From an API
MCP support. Model Context Protocol turns API endpoints into callable tools for LLMs. An agent queries data in natural language. Providers with native MCP servers remove adapter code entirely.
Portfolio context. Bots act on positions, not only prices. Wallet balances, DeFi exposure, and profit and loss all matter as inputs.
Execution rails. Many bots must convert assets on a schedule. Swap APIs handle conversion without exchange accounts or custody risk.
Data freshness. Automated strategies act on current prices. Streaming delivery and low-latency endpoints decide how fast a bot reacts.
Predictable pricing. Bots poll constantly. Credit models, rate limits, and free tiers decide real operating costs.
At a Glance
Before diving into each provider, here is a side-by-side snapshot.
| CoinStats API | ChangeHero | StealthEX | ChangeNOW | Codex | |
| Primary focus | Market, wallet, DeFi and portfolio data | Non-custodial swap execution | Privacy-focused swap execution | High-volume swap execution | Real-time token and prediction-market streams |
| Coverage | 100,000+ coins, 120+ blockchains | 350+ assets | 2,000+ assets | 1,500+ assets, 110+ networks | 90M+ tokens, 80+ networks |
| AI agent support | Native MCP Server, x402 payments | No | No | No | MCP server, TypeScript SDK |
| Delivery | REST + MCP Server | REST | REST | REST, widget, white-label | WebSocket streams |
| Free tier | 20,000 credits/month | Free integration | Free integration | Free integration | 10K requests/month |
| Paid entry | ~$49/month | Commission per swap | 0-0.5% commission | Revenue share | $350/month |
1. CoinStats API
CoinStats API covers the data half of a bot from one key. It returns market data, wallet balances, DeFi positions, portfolio analytics, and token security.
Coverage is the widest on this list. The API tracks 100,000+ coins across 200+ exchanges. Wallet and DeFi data spans 120+ blockchains, including Solana, Ethereum, EVM chains, and Bitcoin. DeFi positions resolve automatically across 10,000+ protocols per wallet. Historical pricing reaches back ten years for backtesting.
Agent support is the standout. CoinStats MCP Server exposes 20+ data tools to LLM agents. Claude, Cursor, Claude Code, VS Code, and n8n connect directly. The connection runs over one OAuth URL. MCP uses the same key as the REST API. An x402 option lets agents pay per request with USDC on Base. No account is needed.
Bot safety comes built in. The Token Risks endpoint screens EVM contracts before a trade. Flags cover honeypots, hidden fees, and upgradeable proxies. The same checks protect 1M monthly CoinStats app users.
On pricing, the free tier includes 20,000 credits per month. Paid plans start at $49 per month. Basic market-data calls cost 1 to 2 credits, so polling stays cheap. A full credit breakdown sits in this crypto API guide.
CoinStats API fits most agent and bot data needs. Think AI trading assistants, portfolio-aware bots, and multi-chain monitors. It is a data API rather than an execution API. Pair it with a swap rail or an exchange API for orders.
2. ChangeHero
ChangeHero handles the conversion step for automated systems. The platform has run a non-custodial swap API since 2017. Hardware and software wallets integrate its engine, including Trezor, Exodus, Tangem, and OneKey.
The API covers 350+ cryptocurrencies. Fixed and floating rates run through dedicated endpoints. Liquidity aggregates from multiple trading venues. If one source drops, swaps continue uninterrupted. Settlement typically lands under 10 minutes.
For bots, that removes exchange accounts from the loop. A rebalancing bot can rotate holdings straight from a wallet. Treasury scripts can convert revenue to stablecoins on a schedule. Custom setups add optimized routing and zero-fee stablecoin pairs on request.
On pricing, integration is free. Partners earn a configurable commission per swap. There are no volume minimums.
ChangeHero fits swap automation, rebalancing systems, wallet integrations, and treasury conversion flows. It is not a data provider. Pricing feeds and portfolio context need a separate source.
3. StealthEX
StealthEX is the privacy-minded execution option. The instant exchange API is fully non-custodial. End users never create StealthEX accounts. Standard swap volumes carry no mandatory KYC. Risk-based screening applies only to flagged transactions.
Coverage spans 2,000+ coins and tokens across many networks. The REST API supports fixed and floating rates. Floating rates match market price at execution. Fixed rates lock the receive amount in advance. Settlement usually takes 5 to 30 minutes.
The commercial model suits bot builders. Integration is free with no monthly commitments. Partners set a commission between 0 and 0.5 percent on routed volume. For budgeting the data side, the team publishes a free crypto API comparison.
StealthEX fits Telegram bots, wallet integrations, DEX aggregators, and privacy-focused conversion flows. There are no market data or analytics endpoints. Settlement runs in minutes, not milliseconds.
4. ChangeNOW
ChangeNOW is the scale pick among the swap rails. The API covers 1,500+ assets across 110+ networks. More than two million exchange pairs are available. Liquidity aggregates from both CEX and DEX venues. Swaps typically settle in under one minute.
Compliance posture is the differentiator here. ChangeNOW holds SOC 2 Type II and ISO 27001:2022 certifications. A 99.99 percent uptime SLA backs the service. That matters for bots moving real user funds at volume. Integration options include a full API, a widget, and white-label deployments.
On pricing, the model is volume-based revenue share. There are no setup or monthly fees.
ChangeNOW fits high-throughput conversion bots, payment flows, wallets, and embedded swap products. Minimum swap amounts apply, typically $1.70 to $20. UK users are not supported, and market data needs a separate provider.
5. Codex
Codex gives automated traders one API for token and prediction-market data. It streams real-time prices, trades, and OHLCV candles for 90M+ tokens across 80+ networks. Prediction-market coverage adds live odds, volume, and trader activity. Sources include Polymarket, Kalshi, and other venues.
Delivery runs over WebSockets with a 99.9 percent uptime record. Data lands at 1-second freshness. Bots act on current prices rather than stale quotes. Enriched data comes built in. There is no indexing pipeline to maintain.
Agent support is strong. Builders plug in through a TypeScript SDK and an MCP server. Agentic payments run via MPP. TradingView, Coinbase, and Uniswap use the platform.
On pricing, the free tier includes 10K requests per month. Paid plans start at $350 per month.
Codex fits streaming-first trading bots, long-tail token scanners, and prediction-market agents. Entry pricing sits higher than the other providers on this list.
Choosing the Right Provider (or Combination)
Picking one API for every bot is not realistic. The five providers above cover different layers.
For the data layer, CoinStats API covers the widest surface. Market data, wallets, DeFi, portfolio analytics, and MCP sit behind one key. Most agent builds can start there. Codex adds streaming depth for long-tail tokens and prediction markets. The two also run well side by side. One supplies portfolio context, the other tick-level streams.
Execution is a separate decision. ChangeHero, StealthEX, and ChangeNOW each provide swap rails. Pick by what the bot needs most. ChangeHero brings wallet-partner pedigree and flexible custom setups. StealthEX brings privacy and no user accounts. ChangeNOW brings certifications and sub-minute settlement.
A common production stack pairs one data API with one swap rail. For Ethereum builds, see our guide to the best Ethereum API providers. For Solana, see the best Solana API providers.
All five providers here offer free entry points, so testing a combination costs nothing.
Pro tip: Once a bot goes live, those subscriptions become a recurring bill. Paid tiers run from $49 to $350 per month. Teams holding stablecoins pay them straight from an Altitude stablecoin corporate card. A virtual card per provider keeps each bill separate. Spend limits cap what any single API can charge.
