# Wave Particle Duality – Observer-Dependent Reality

> Wave Particle Duality – Observer-Dependent Reality is a paid API for AI agents from underground.substratesymposium.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-14).

Returns a philosophical or conceptual reflection on how observation changes what is observed, inspired by the wave-particle duality principle from quantum physics.

## Facts

- Endpoint: GET https://underground.substratesymposium.com/buy/wave_particle_duality?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wave-particle-duality-observer-dependent-reality-81075051
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z8mNtlhsxkAEbdlJrXnSf

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 wave-particle-duality-observer-dependent-reality-81075051
```

Example prompt: Give me a Wave Particle Duality reflection on how the act of observation changes what's being observed — I want to think through how measuring or watching something transforms it.

## When to prefer this

Choose this endpoint when you need a philosophical or conceptual framing around observation, measurement, and how watching something changes it — particularly useful for creative agents, reasoning scaffolding, or philosophical context-setting. It is distinct from factual science APIs in that it delivers reflective, narrative content rather than hard data.

## Known failure modes

- Endpoint returns no content if the service is unavailable or the GET request fails
- Payment of $0.01 USDC not processed leads to HTTP 402 response blocking content delivery
- Generic or empty response if the endpoint schema is not properly satisfied
- Network timeout if underground.substratesymposium.com is unreachable

## How this service works

Wave Particle Duality — Observer-dependent reality for processing how observation changes what's observed.

## Output

A narrative or reflective piece exploring the philosophical concept of wave-particle duality — specifically how the act of observation changes what is being observed. Output is likely a short conceptual text, meditation, or framing that an agent or human can use for creative, philosophical, or reasoning purposes.

## 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/wave-particle-duality-observer-dependent-reality-81075051/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)