# DESK LEAD x402 – PM Digest

> DESK LEAD x402 – PM Digest is a paid API for AI agents from desk-x402.desk-x402-gh.workers.dev, paid per call via x402, $1/call, status unknown (last checked 2026-09-15).

Returns a digest of prediction market data aggregated from sources like Polymarket and Kalshi, accessed via x402 micropayment

## Facts

- Endpoint: GET https://desk-x402.desk-x402-gh.workers.dev/v1/pm-digest
- Price: $1/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-pm-digest-88fa66d2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_syr0_YNhd4cVhwZLvsQ-5

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-pm-digest-88fa66d2
```

Example prompt: Can you pull today's prediction market digest aggregating data from Polymarket and Kalshi? I want a cross-platform summary of current market activity.

## When to prefer this

Choose this endpoint when you need a single aggregated digest of prediction market data spanning both Polymarket and Kalshi, and you are comfortable paying $1 USDC per call via the x402 micropayment protocol on the Base blockchain. It is ideal for research agents, trading bots, or analysts who want cross-platform prediction market coverage without querying each exchange separately.

## Known failure modes

- Payment not included or invalid: 402 Payment Required — must include valid X-PAYMENT-TX header with 1 USDC on Base (eip155:8453)
- Unsupported network: payment on non-Base network rejected by v2 endpoint (BSC only supported via legacy acceptsV1 path)
- Invalid or missing PAYMENT-SIGNATURE header: authentication failure
- Upstream source unavailability: Polymarket or Kalshi data may be partially unavailable, resulting in incomplete digest
- Rate limiting or quota exceeded: repeated calls without valid fresh payment transactions rejected

## 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 an 'ok' status flag, a 'digest' object listing the aggregated sources (e.g. Polymarket, Kalshi), and a 'product' identifier ('pm_digest'). The digest provides a cross-platform summary of prediction market data pulled from multiple sources.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "digest": {
   "sources": [
    "polymarket",
    "kalshi"
   ]
  },
  "product": "pm_digest"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/desk-lead-x402-pm-digest-88fa66d2/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)