# BaseBuilder Trading Contract Verify

> BaseBuilder Trading Contract Verify is a paid API for AI agents from bb-trading-gold.vercel.app, paid per call via x402, $0.090066/call, status unknown (last checked 2026-10-11).

Verifies a trading contract submitted to the BaseBuilder Trading platform

## Facts

- Endpoint: POST https://bb-trading-gold.vercel.app/api/contract/verify?utm_source=zero.xyz
- Price: $0.090066/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder-trading-contract-verify-9eafe2e1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_59XOSR7SnVD30EWVIu0-z

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-trading-contract-verify-9eafe2e1 -d '<json body>'
```

Example prompt: Can you verify this trading contract on BaseBuilder Trading for me — the contract ID is 0xabc123 and I need to confirm it's valid before I proceed with the trade?

## When to prefer this

Use this endpoint when you need to verify or validate the authenticity and correctness of a trading contract on the BaseBuilder Trading platform before executing or settling a trade.

## Known failure modes

- Invalid contract format returns validation error
- Missing required contract fields returns 400 Bad Request
- Contract not found returns 404
- Payment not included returns 402 Payment Required
- Malformed request body returns 400

## How this service works

BaseBuilder Trading API hub - 20 paid endpoints

## Output

A verification response indicating whether the submitted contract is valid, including status details and any validation errors or confirmation of contract authenticity.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder-trading-contract-verify-9eafe2e1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bb-trading-gold.vercel.app](https://www.zero.xyz/host/bb-trading-gold.vercel.app/llms.txt)