# Saylor Innovations Guide Library – Pytest Mocking & Patching

> Saylor Innovations Guide Library – Pytest Mocking & Patching is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Returns a knowledge-base article explaining pytest mocking best practices: patch-where-used, autospec, side_effect for retries, monkeypatch, and freezegun

## Facts

- Endpoint: GET https://saylorinnovations.com/api/kb/pytest-mock-patch-where-used-autospec-monkeypatch?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-guide-library-pytest-mocking-patching-1f79e853
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YRwg0P0b9D2qqhcDQoYHb

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 saylor-innovations-guide-library-pytest-mocking-patching-1f79e853
```

Example prompt: Pull up the Saylor Innovations guide on pytest mocking — I need to understand how to use patch correctly, autospec to catch bad calls, side_effect for retry simulation, monkeypatch, and freezegun.

## When to prefer this

Choose this endpoint when an agent or developer needs an authoritative, self-contained reference article specifically covering pytest mocking patterns (patch-where-used, autospec, side_effect, monkeypatch, freezegun) without scraping the open web. Useful for agents building developer tooling, code-review bots, or tutorial assistants that need reliable, licensed content about Python testing.

## Known failure modes

- Payment not received or x402 auth missing — returns 402 Payment Required
- Guide not found at this path — returns 404 Not Found
- Service temporarily unavailable — returns 503
- Rate limiting exceeded — returns 429

## How this service works

Pytest mocking - patch where the name is used, autospec to catch bad calls, side_effect for retries, monkeypatch, freezegun

## Output

A JSON object containing the guide's unique ID, title, category, full body text with explanations and examples of pytest mocking techniques (patch placement, autospec, side_effect for retries, monkeypatch, freezegun), along with a license identifier and optional price field.

## 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"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "id",
      "t",
      "c",
      "body"
     ],
     "properties": {
      "c": {
       "type": "string",
       "description": "Category of the guide"
      },
      "t": {
       "type": "string",
       "description": "Title of the guide"
      },
      "id": {
       "type": "string",
       "description": "Identifier of the record"
      },
      "body": {
       "type": "string",
       "description": "Main body text"
      },
      "price": {
       "type": [
        "number",
        "null"
       ],
       "description": "Price"
      },
      "license": {
       "type": "string",
       "description": "License identifier"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-guide-library-pytest-mocking-patching-1f79e853/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)