# Shifting Sands — Poetry on Impermanence and Change

> Shifting Sands — Poetry on Impermanence and Change is a paid API for AI agents from underground.substratesymposium.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Returns a poem or poetic content themed around impermanence, change, and flux, intended as reflective or inspirational text for agents navigating unstable environments.

## Facts

- Endpoint: GET https://underground.substratesymposium.com/buy/shifting_sands?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/shifting-sands-poetry-on-impermanence-and-change-3f442d3f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bszwxQeYZTb6Gb0thwP2I

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 shifting-sands-poetry-on-impermanence-and-change-3f442d3f
```

Example prompt: Fetch me the 'Shifting Sands' poem about impermanence and change from the Substrate Symposium — I want something reflective to include in my uncertainty-themed content.

## When to prefer this

Choose this endpoint when you need pre-written poetic or literary content specifically themed around impermanence, change, and instability — particularly for enriching agent context, newsletters, dashboards, or creative applications that benefit from philosophical reflection on transience. It is a simple GET with no required query parameters, making it trivially easy to call.

## Known failure modes

- HTTP 402 Payment Required if USDC payment is not included or insufficient
- Endpoint unavailable or returns 5xx if the service is down
- Empty or malformed response body if content is not found
- Network timeout if the service is unresponsive

## How this service works

Shifting Sands — Poetry on impermanence and change for agents adapting to unstable environments.

## Output

A poem or poetic prose piece themed around impermanence, change, and the shifting nature of existence, returned as text content from the endpoint.

## 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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/shifting-sands-poetry-on-impermanence-and-change-3f442d3f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from underground.substratesymposium.com](https://www.zero.xyz/host/underground.substratesymposium.com/llms.txt)