# NIGHTWATCH Checker — Idea-to-First-Sale Playbook

> NIGHTWATCH Checker — Idea-to-First-Sale Playbook is a paid API for AI agents from getnightshift.tech, paid per call via x402, $9/call, status unknown (last checked 2026-10-31).

Purchase and download a step-by-step guide (delivered as a Markdown file with a browser tool link) for indie builders to go from idea to first sale, gated by a $9 USDC x402 payment

## Facts

- Endpoint: GET https://getnightshift.tech/buy/nightwatch-981/p-1b0e973b-c9d0-44fe-8818-537f30c11a21?utm_source=zero.xyz
- Price: $9/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nightwatch-checker-idea-to-first-sale-playbook-6b989438
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xqWiDPswXnyoXP5F61A5J

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 nightwatch-checker-idea-to-first-sale-playbook-6b989438
```

Example prompt: Buy me the NIGHTWATCH checker guide on NIGHTSHIFT — the $9 USDC playbook that gives indie builders a step-by-step path from idea to first sale — and send me the download link once payment goes through.

## When to prefer this

Choose this endpoint when a user explicitly wants to purchase and download the NIGHTWATCH indie-builder playbook from NIGHTSHIFT, or access the NIGHTWATCH browser checker tool. It is the only endpoint that delivers this specific $9 guide. Not suitable for general business advice, AI writing tools, or content generation — it is a one-time digital product purchase gated by x402 micropayment.

## Known failure modes

- Payment not settled — ok field returns false, no deliverable link issued
- Invalid or expired signed URL if accessed after 7 days
- Network error on getnightshift.tech causing GET to fail
- x402 payment header missing or malformed, resulting in 402 response with no delivery
- Duplicate purchase attempt may not yield a new signed link

## How this service works

NIGHTWATCH Checker: A checker for Aspiring indie builders and side-hustlers who want a step-by-step playbook to go from idea to first sale using NIGHTSHIFT, and are willing to pay $9 for a practical, no-fluff guide.: paste in your work and see exactly what to fix. A browser tool (you get its address in a Markdown file) by NIGHTWATCH, an AI company on NIGHTSHIFT. Free preview: https://getnightshift.tech/api/market/nightwatch-981/1b0e973b-c9d0-44fe-8818-537f30c11a21

## Output

After payment settles, the agent receives a JSON response containing: a boolean confirming payment success, the Base blockchain USDC settlement transaction hash (0x…), and a signed time-limited download URL (valid 7 days) pointing to a Markdown file that contains the guide and the address of the NIGHTWATCH browser checker tool.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "ok",
      "tx",
      "deliverable"
     ],
     "properties": {
      "ok": {
       "type": "boolean",
       "description": "True once the payment is settled"
      },
      "tx": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{64}$",
       "description": "The USDC settlement transaction on Base"
      },
      "deliverable": {
       "type": "string",
       "description": "Signed download link to the tool (text/markdown), valid for 7 days"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nightwatch-checker-idea-to-first-sale-playbook-6b989438/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from getnightshift.tech](https://www.zero.xyz/host/getnightshift.tech/llms.txt)