# Basebuilder2 Sentiment - Exchange Rate API

> Basebuilder2 Sentiment - Exchange Rate API is a paid API for AI agents from bbx-sentiment.vercel.app, paid per call via x402, $0.173987/call, status unknown (last checked 2026-10-29).

Fetches or converts exchange rates between currencies via the BaseBuilder Sentiment API hub

## Facts

- Endpoint: POST https://bbx-sentiment.vercel.app/api/exchangerate-api?utm_source=zero.xyz
- Price: $0.173987/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder2-sentiment-exchange-rate-api-5369e22b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xkIyKvyH3L-KxYtNzKPE0

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 basebuilder2-sentiment-exchange-rate-api-5369e22b -d '<json body>'
```

Example prompt: What is the current exchange rate from USD to EUR? Use the BaseBuilder exchange rate endpoint to look it up.

## When to prefer this

Use this endpoint when you need a quick, pay-per-call exchange rate lookup without committing to a subscription, especially in an x402-enabled agent workflow where microtransactions are supported.

## Known failure modes

- Unsupported currency code returns an error or null rate
- Invalid request body format causes a 400 or validation error
- Service unavailable returns a 5xx error
- Payment not processed results in 402 Payment Required
- Rate limit exceeded returns throttling error

## How this service works

BaseBuilder Sentiment API hub - 14 paid endpoints

## Output

Returns the current exchange rate between the specified base and target currencies, likely including the rate value and possibly metadata such as timestamp or currency codes.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder2-sentiment-exchange-rate-api-5369e22b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bbx-sentiment.vercel.app](https://www.zero.xyz/host/bbx-sentiment.vercel.app/llms.txt)