# DESK LEAD x402 – Daily Retainer Research API

> DESK LEAD x402 – Daily Retainer Research API is a paid API for AI agents from desk-x402.desk-x402-gh.workers.dev, paid per call via x402, $150/call, status unknown (last checked 2026-09-15).

Returns a daily-retainer research data product via x402 micropayment, confirming access tier and product details for a $150 USDC per-call fee.

## Facts

- Endpoint: GET https://desk-x402.desk-x402-gh.workers.dev/v1/desk-retainer-day
- Price: $150/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-daily-retainer-research-api-055d0ea4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__Jf6NfNKdPJYoB88U71bs

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-daily-retainer-research-api-055d0ea4
```

Example prompt: I want to access the desk-retainer-day research product — go ahead and pay the $150 USDC daily retainer fee on Base and retrieve the data for me.

## When to prefer this

Use this endpoint when you need to programmatically access the DESK LEAD daily retainer research product via x402 v2 micropayment protocol on the Base blockchain. Prefer this over alternatives when your agent is already integrated with x402 payment flows, you want per-call USDC pricing without a subscription, and you specifically need the 'retainer-day' tier product from the DESK LEAD catalog.

## Known failure modes

- Payment header missing or malformed — HTTP 402 returned with payment requirements
- Wrong network used (non-Base eip155:8453 for v2) — payment rejected
- Insufficient USDC balance — transaction fails before endpoint responds
- Invalid payment signature — authentication rejected
- Rate or replay issues if same payment TX reused — idempotency not guaranteed

## 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

Returns a JSON object with fields: ok (boolean confirming success), tier (string 'retainer-day'), product (string 'desk_retainer_day'), and priceUsdc (number, 150) — confirming successful payment and access grant for the daily retainer research product.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "format": {
       "enum": [
        "json",
        "html"
       ],
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "tier": "retainer-day",
  "product": "desk_retainer_day",
  "priceUsdc": 150
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/desk-lead-x402-daily-retainer-research-api-055d0ea4/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)