# Mempool.space API

> Mempool.space API on Apizie: 5 endpoints (Recommended Fees, Blocks, Mempool, Difficulty Adjustment, …) returned as clean JSON through one API key. 5 endpoints are live now. Call it over REST at https://zieapi.vercel.app/v1/finance:mempool-space/{endpoint} or from Claude, ChatGPT and Cursor through the Apizie MCP server. Free plan: 1,000 requests a month.

- Project key: `finance:mempool-space`
- Category: Finance
- Status: live
- Source: https://mempool.space
- Page: https://zieapi.vercel.app/api/finance/mempool-space
- OpenAPI: https://zieapi.vercel.app/api/finance/mempool-space/openapi.json

Bitcoin network fees, mempool backlog, latest blocks and difficulty adjustment from mempool.space.

## Endpoints

### Recommended Fees
`GET https://zieapi.vercel.app/v1/finance:mempool-space/fees`

### Blocks
`GET https://zieapi.vercel.app/v1/finance:mempool-space/blocks`

| Parameter | Type | Required | Description |
|---|---|---|---|
| height | integer | no |  |

### Mempool
`GET https://zieapi.vercel.app/v1/finance:mempool-space/mempool`

### Difficulty Adjustment
`GET https://zieapi.vercel.app/v1/finance:mempool-space/difficulty-adjustment`

### Projected Blocks
`GET https://zieapi.vercel.app/v1/finance:mempool-space/fee-projection`

## Example
```
curl "https://zieapi.vercel.app/v1/finance:mempool-space/fees" \
  -H "x-api-key: $APIZIE_KEY"
```

## FAQ

### How do I call the Mempool.space API?
Create a free Apizie key, then send GET https://zieapi.vercel.app/v1/finance:mempool-space/fees with the header x-api-key. Every endpoint returns { project, data, timestamp }.

### Is the Mempool.space API free on Apizie?
Yes. The Free plan includes 1,000 requests a month at 100 requests a minute, no credit card.

### Can AI agents use the Mempool.space API?
Yes. Add the Apizie MCP server (https://zieapi.vercel.app/mcp) to Claude, ChatGPT, Cursor or VS Code, then ask in plain language. The agent calls run_scraper with project key finance:mempool-space.

### What is the status of the Mempool.space API?
Live: works with just an Apizie key