# BaseBuilder Stocks - Forex Rate

> BaseBuilder Stocks - Forex Rate is a paid API for AI agents from bb-stocks.vercel.app, paid per call via x402, $0.065184/call, status unknown (last checked 2026-09-13).

Returns the current exchange rate between two currencies via a paid POST endpoint

## Facts

- Endpoint: POST https://bb-stocks.vercel.app/api/forex/rate
- Price: $0.065184/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder-stocks-forex-rate-3a6d40a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1YuWHqMVP8-XSaBJRKzEK

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-stocks-forex-rate-3a6d40a6 -d '<json body>'
```

Example prompt: What's the current forex exchange rate from USD to EUR right now?

## When to prefer this

Use this endpoint when you need real-time or near-real-time forex exchange rates for a specific currency pair and are comfortable with a micro-payment per call via x402 protocol; suitable for agents that need live currency data without a subscription-based API key.

## Known failure modes

- Invalid or unsupported currency pair returns an error
- Payment not processed results in 402 response
- Malformed request body returns 400 error
- Rate data temporarily unavailable returns 503
- Unsupported base or quote currency symbol causes lookup failure

## How this service works

BaseBuilder Stocks API hub - 21 paid endpoints

## Output

Returns the current exchange rate for the requested currency pair, expressed as the price of the base currency in terms of the quote currency.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder-stocks-forex-rate-3a6d40a6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bb-stocks.vercel.app](https://www.zero.xyz/host/bb-stocks.vercel.app/llms.txt)