# DESK LEAD x402 – Pair Digest

> DESK LEAD x402 – Pair Digest is a paid API for AI agents from desk-x402.desk-x402-gh.workers.dev, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

Returns a digest of trading or data pairs available through the DESK LEAD micropay research API

## Facts

- Endpoint: GET https://desk-x402.desk-x402-gh.workers.dev/v1/pair-digest
- Price: $0.25/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-pair-digest-5b3ebfc2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KBBn3zapwlXcP4JECDE4V

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-pair-digest-5b3ebfc2
```

Example prompt: Can you pull the pair digest from the DESK LEAD research API — I want to see what trading pairs are currently available?

## When to prefer this

Use this endpoint when you need a structured digest of available pairs from the DESK LEAD micropay research API and are prepared to pay $0.25 USDC per call via the x402 v2 protocol on Base. Prefer this over direct catalog browsing when you need machine-readable pair metadata in a single call rather than navigating the free /.well-known/x402.json catalog.

## Known failure modes

- Payment not included or invalid: 402 response requiring X-PAYMENT-TX header with valid Base (eip155:8453) USDC payment
- Invalid network: endpoint rejects payment on unsupported chains (primary v2 requires Base only)
- Malformed properties filter: unexpected properties string may return empty pairs or error
- Worker downtime: Cloudflare Worker unavailability returns 5xx
- Signature mismatch: invalid PAYMENT-SIGNATURE header causes rejection

## 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' boolean, a 'pairs' array listing available pair entries, and a 'product' string set to 'pair_digest'. May return an empty pairs array if no matching pairs exist for the given filter.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "pairs": [],
  "product": "pair_digest"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/desk-lead-x402-pair-digest-5b3ebfc2/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)