# Basebuilder2 Trading - Contract Verify

> Basebuilder2 Trading - Contract Verify is a paid API for AI agents from bbx-trading.vercel.app, paid per call via x402, $0.090066/call, status unknown (last checked 2026-09-14).

Verifies trading contract details or parameters for the BaseBuilder Trading platform

## Facts

- Endpoint: POST https://bbx-trading.vercel.app/api/contract/verify
- Price: $0.090066/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder2-trading-contract-verify-a0ad7835
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AoXjLpUFJwhYGcZfm9iEq

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-trading-contract-verify-a0ad7835 -d '<json body>'
```

Example prompt: Can you verify this trading contract on BaseBuilder to make sure it's valid before I proceed with the trade?

## When to prefer this

Use this endpoint when you need to verify or validate a trading contract specifically within the BaseBuilder Trading (BBX) ecosystem before executing or committing to a trade. Prefer this over generic contract validators when the contract originates from or is intended for the BBX trading platform.

## Known failure modes

- Invalid or malformed contract data returns a 400 error
- Contract not found returns a 404 response
- Authentication failure or missing payment returns a 402 response
- Server-side validation errors return a 500 response
- Rate limiting or quota exceeded returns a 429 error

## How this service works

BaseBuilder Trading API hub - 20 paid endpoints

## Output

Returns a verification status indicating whether the submitted contract is valid, along with any validation errors or details about the contract terms. May include a validity boolean, error messages, and relevant contract metadata.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder2-trading-contract-verify-a0ad7835/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bbx-trading.vercel.app](https://www.zero.xyz/host/bbx-trading.vercel.app/llms.txt)