# BaseBuilder Crypto Exchange Rates

> BaseBuilder Crypto Exchange Rates is a paid API for AI agents from bb-crypto.vercel.app, paid per call via x402, $0.057811/call, status unknown (last checked 2026-09-15).

Fetches current cryptocurrency exchange rates for one or more trading pairs

## Facts

- Endpoint: POST https://bb-crypto.vercel.app/api/exchange/rates
- Price: $0.057811/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder-crypto-exchange-rates-c32e7e07
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_s_MyW9xKdSNAiriTjuhIK

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability basebuilder-crypto-exchange-rates-c32e7e07 -d '<json body>'
```

Example prompt: What are the current exchange rates for BTC/USD, ETH/USD, and SOL/USDC right now?

## When to prefer this

Use this endpoint when you need real-time or near-real-time cryptocurrency exchange rates via a paid, x402-compatible API that accepts USDC micropayments. Suitable for agents operating on Base or other EVM chains that need programmatic crypto price lookups without managing a full exchange API key subscription.

## Known failure modes

- Invalid or unsupported trading pair returns an error
- Network or upstream exchange data unavailable
- Payment not processed results in 402 response
- Malformed request body returns 400 bad request
- Rate limit exceeded if too many requests made

## How this service works

BaseBuilder Crypto API hub - 26 paid endpoints

## Output

Returns current exchange rate data for the requested cryptocurrency pairs, including price values and likely timestamps for when the rates were fetched.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder-crypto-exchange-rates-c32e7e07/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bb-crypto.vercel.app](https://www.zero.xyz/host/bb-crypto.vercel.app/llms.txt)