# PennyPress — Orange Game Theory Essay

> PennyPress — Orange Game Theory Essay is a paid API for AI agents from www.pennypress.org, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-31).

Delivers the full text of the essay 'Orange Game Theory' about Bitcoin and the race to 21 million, in Markdown format, for a micro-payment of $0.02 USDC.

## Facts

- Endpoint: GET https://www.pennypress.org/essays/orange-game-theory?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennypress-orange-game-theory-essay-161476bf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jNkcyGUFgfHj9NVCxGQUN

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 pennypress-orange-game-theory-essay-161476bf
```

Example prompt: Can you fetch the 'Orange Game Theory' essay from PennyPress for me — the one about Bitcoin and the race to 21 million — and show me the full text?

## When to prefer this

Choose this endpoint when you specifically want the 'Orange Game Theory' essay about Bitcoin from PennyPress, especially in contexts where an agent can handle x402 micro-payments in USDC and needs machine-readable Markdown content. It is a fixed, curated piece of long-form writing — not a search or query interface.

## Known failure modes

- Payment not completed or rejected — essay content not delivered
- Network timeout or server unavailability returning a non-200 status
- Incorrect or unsupported HTTP method used (only GET/HEAD/DELETE accepted)
- Essay slug not found if URL path changes

## How this service works

An ensemble about Bitcoin and the race to 21 million.

## Output

Returns the full essay in Markdown format, along with metadata including the essay title, slug, description, publication name, format, word count, and price. Content is gated behind a $0.02 USDC micro-payment via the x402 protocol.

## 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": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "title",
      "format",
      "content"
     ],
     "properties": {
      "slug": {
       "type": "string"
      },
      "type": {
       "type": "string"
      },
      "price": {
       "type": "string"
      },
      "title": {
       "type": "string"
      },
      "format": {
       "type": "string"
      },
      "content": {
       "type": "string",
       "description": "Full essay text in Markdown, delivered after payment."
      },
      "word_count": {
       "type": "integer"
      },
      "description": {
       "type": "string"
      },
      "publication": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pennypress-orange-game-theory-essay-161476bf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.pennypress.org](https://www.zero.xyz/host/www.pennypress.org/llms.txt)