Best Bitcoin Fee API for AI Agents
AI agents need a Bitcoin fee source that answers the decision, not just the data point. Satoshi API gives agents a free first call, MCP tooling, and x402 paid calls when a buyer wallet is ready.
/api/v1/fees/recommended, llms.txt, bitcoin-mcp, and x402 paid endpoints.
Why agents need fee intelligence
Raw Bitcoin fee rates tell an agent what the mempool looks like. They do not tell the agent what to recommend. Satoshi API converts fee estimates and congestion context into a practical answer: send now, wait, or choose a different confirmation target.
The free first call is deliberately simple so search crawlers, coding agents, and wallet prototypes can verify value before signup or payment.
Agent integration paths
Free first value
Call GET /api/v1/fees/recommended to get a useful fee recommendation with no payment or key.
MCP tooling
Install bitcoin-mcp so MCP-compatible agents can call Bitcoin fee and mempool tools directly.
x402 paid calls
Use /x402/start when an agent has a funded buyer wallet and needs premium keyless calls.
Comparison for AI builders
| Need | Raw RPC | Block explorer API | Satoshi API |
|---|---|---|---|
| Send-now-or-wait answer | No | Usually raw fee rates | Yes |
| Machine-readable agent docs | No | Varies | /llms.txt, agent card, OpenAPI |
| MCP integration | Build it yourself | Usually no | pip install bitcoin-mcp |
| Free first call | Requires node access | Usually yes | Yes, hosted and self-hostable |
Copy-paste first call
curl https://bitcoinsapi.com/api/v1/fees/recommendedFor MCP agents, start with:
pip install bitcoin-mcpFAQ
What is the best Bitcoin fee API for AI agents?
The best Bitcoin fee API for AI agents returns an actionable send-now-or-wait answer, exposes machine-readable docs, and supports MCP or direct REST calls. Satoshi API is built for that workflow through /api/v1/fees/recommended, llms.txt, bitcoin-mcp, and x402 paid calls.
Can an AI agent call Satoshi API without paying first?
Yes. Agents can call https://bitcoinsapi.com/api/v1/fees/recommended without a wallet, payment, or API key, then register a free key at /api/v1/register if they need higher sustained usage.
How does bitcoin-mcp help AI agents?
bitcoin-mcp exposes Satoshi API as MCP tools so Claude, ChatGPT-compatible clients, and custom agents can request live Bitcoin fee and mempool context without scraping a block explorer.