# DESK LEAD x402 – Research Brief

> DESK LEAD x402 – Research Brief is a paid API for AI agents from desk-x402.desk-x402-gh.workers.dev, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-15).

Returns a paid micropayment-gated research brief (e.g. BSC pin-universe analysis) for $0.50 USDC via x402 protocol

## Facts

- Endpoint: GET https://desk-x402.desk-x402-gh.workers.dev/brief
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/desk-lead-x402-research-brief-e3e5bbcd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5BjMKqhlqwVTSnL9MmNZZ

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 desk-lead-x402-research-brief-e3e5bbcd
```

Example prompt: Pull the DESK LEAD research brief for BSC pin-universe — I'll pay the $0.50 USDC fee via Base network using my x402 wallet.

## When to prefer this

Choose this endpoint when you need a one-off, pay-per-call research brief gated by x402 micropayment on Base network, especially for BSC pin-universe or related blockchain project analysis. It is ideal for agents that can autonomously execute USDC micropayments and want lightweight, instant research summaries without a subscription.

## Known failure modes

- Payment not included or malformed X-PAYMENT-TX header → 402 Payment Required
- Wrong network used (e.g. not Base for v2) → payment rejected
- Insufficient USDC payment amount → 402 error
- Invalid or expired payment signature → authentication failure
- Cloudflare Worker unavailable → 503 or timeout

## How this service works

Micropay research APIs (x402 v2 + bazaar). Free catalog at /.well-known/x402.json. Primary v2 accepts: Base eip155:8453 only. Legacy X-PAYMENT-TX still supports bsc|base via acceptsV1. Headers: X-PAYMENT-TX, X-PAYMENT-NETWORK, PAYMENT-SIGNATURE. No financial advice.

## Output

A JSON object containing: ok (boolean success flag), brief (full research brief text, e.g. BSC pin-universe analysis), paidTx (on-chain transaction hash confirming payment), network (e.g. 'base'), product identifier ('brief'), and amountUsdc (0.5).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "brief": "BSC pin-universe research brief…",
  "paidTx": "0x…",
  "network": "base",
  "product": "brief",
  "amountUsdc": 0.5
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/desk-lead-x402-research-brief-e3e5bbcd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from desk-x402.desk-x402-gh.workers.dev](https://www.zero.xyz/host/desk-x402.desk-x402-gh.workers.dev/llms.txt)