CoinCap API: pricing, API and features
CoinCap API 3.0: REST market data for 1,000+ cryptocurrencies (prices, market cap, history, exchanges, markets, TA indicators) with MCP endpoint and optional keyless x402 pay-per-call.
Visit CoinCap API ↗ Plain link, no affiliate. Category: Market data APIs.
At a glance: CoinCap API (CoinCap) — pricing: from $1/one-time; free tier: Yes; REST: Yes; MCP: Yes; open source: unknown.
Pricing
- Model
- usage-based
- Free tier
- Yes — OpenAPI spec says a prepaid key can be created with 50 free starter credits, no payment or signup; rate limit shown as 600 calls/min for that key.
- Plans
- Prepaid credits (x402): $1/one-time (500 credits per 1 USD in USDC on Base; minimum 0.01 USD)
- Notes
- Standard API keys come from the CoinCap dashboard; plan prices for those keys were not published on pages read.
Verified on 2026-10-30 · Source: https://rest.coincap.io/api-docs.json
Access & auth
- Authentication
- api-key
- KYC required
- No
- Notes
- Bearer key or ?apiKey=; 12 agentFriendly endpoints accept keyless per-call USDC payment via x402 (Base).
Verified on 2026-10-30 · Source: https://rest.coincap.io/api-docs.json
Coverage
- Exchanges
- Exchange and market endpoints exist (/exchanges, /markets); list not stated
- Chains
- unknown
- Assets
- Over 1,000 cryptocurrencies
Verified on 2026-10-30 · Source: https://docs.coincap.io/
Capabilities
- Capabilities
- price-data, historical-data
Verified on 2026-10-30 · Source: https://rest.coincap.io/api-docs.json
Interfaces
- REST API
- Yes
- WebSocket
- unknown
- SDKs
- none documented
- Official MCP server
- Yes
- Other
- OpenAPI 3 spec; hosted MCP endpoint https://rest.coincap.io/mcp; community MCP server on GitHub (CC3-0/coincap-mcp-server)
Verified on 2026-10-30 · Source: https://rest.coincap.io/api-docs.json
Open source & self-hosting
- Open source
- unknown
- Licence
- proprietary
- Self-host
- No
Verified on 2026-10-30 · Source: https://docs.coincap.io/
FAQ
Does CoinCap API have a free tier?
Yes. OpenAPI spec says a prepaid key can be created with 50 free starter credits, no payment or signup; rate limit shown as 600 calls/min for that key. (verified 2026-10-30)
Does CoinCap API offer an API?
REST: Yes. WebSocket: unknown. Official MCP server: Yes. Verified 2026-10-30.
Is CoinCap API open source or self-hostable?
Open source: unknown; licence: proprietary; self-host: No. Verified 2026-10-30.
What are alternatives to CoinCap API?
Other market data apis in our directory: 0xArchive, AllTick Market Data API, Amberdata Market Data API, Aster Futures API (market data), binance (Siebly.io SDK).
Related market data apis
0xArchive
Historical and live market-data archive for Hyperliquid and Lighter (order books, funding, liquidations, fills) served via REST, WebSocket replay, Parquet exports, SDKs and an MCP server.
AllTick Market Data API
Commercial REST and WebSocket market-data API covering stocks, forex, crypto, metals, oil and indices, with tick, order book and K-line data.
Amberdata Market Data API
Institutional digital asset data API (market, derivatives, on-chain) with REST, WebSocket and bulk delivery; Kaiko announced its acquisition of Amberdata and docs remain live.
Aster Futures API (market data)
Aster DEX futures API docs: public REST and WebSocket market data for USDT perpetuals (klines, depth, trades, mark price/funding, liquidation stream) plus authenticated trading endpoints.
binance (Siebly.io SDK)
Community TypeScript/JavaScript SDK for Binance REST, WebSocket and WebSocket API across spot, margin, options and USD-M/COIN-M futures, with typed responses and automatic reconnects.
Binance Connector (Python)
Official MIT-licensed collection of auto-generated Python SDK packages for Binance APIs (spot, margin, futures, options, copy trading, algo, staking and more), with REST and WebSocket clients.
See CoinCap API alternatives →