I built an open-source REST API for Bitcoin Core -- here's what it does
I built a free Bitcoin REST API. No signup, no API key needed for read endpoints. Just curl it:
curl https://bitcoinsapi.com/api/v1/fees/recommended
It is called Satoshi API -- 74 endpoints returning analyzed, structured Bitcoin data. Instead of just telling you the fee rate is 4 sat/vB, it tells you "Fees are low. Good time to send." It scores mempool congestion, analyzes blocks, and streams fee updates in real time.
**What makes it different:**
- **Free, no signup.** All GET endpoints work without an API key at bitcoinsapi.com.
- **74 endpoints.** Blocks, transactions, fees, mempool, mining stats, address lookups, and more.
- **Analyzed data.** Fee recommendations with context, congestion scores, block weight analysis.
- **AI-ready.** The only Bitcoin API with MCP support (listed on the official Anthropic MCP Registry), meaning AI assistants like Claude can query Bitcoin data directly.
- **Self-hostable.** `pip install satoshi-api` to run on your own node with full sovereignty. Apache-2.0 licensed.
This is a new project from a solo developer. I would love feedback from the community.
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