# Mycelia Signal ETH Same-Day Price Distribution Oracle

> Mycelia Signal ETH Same-Day Price Distribution Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

Returns ETH same-day price distribution statistics (median, p10–p90 quantiles, entropy) derived from Polymarket prediction markets, delivered as an Ed25519-signed attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/prediction/eth/price
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mycelia-signal-eth-same-day-price-distribution-oracle-0fde42ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7KY2w4S173ngUn9r_BbXA

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 mycelia-signal-eth-same-day-price-distribution-oracle-0fde42ad
```

Example prompt: Can you pull today's ETH price distribution from the Polymarket prediction markets — I want the median, the p10–p90 quantile range, and the entropy score, all with a signed attestation so I can verify it's authentic?

## When to prefer this

Choose this endpoint when you need a probabilistic, crowd-sourced view of ETH's same-day price rather than a single spot price — especially when you need cryptographic attestation for auditability, want quantile-based uncertainty bounds (p10–p90) rather than a point estimate, or are building systems that must verify data provenance. Prefer this over raw exchange feeds when prediction market consensus and entropy/uncertainty metrics are required.

## Known failure modes

- Polymarket data unavailable or stale — may return error or degraded data if prediction market is illiquid
- Payment of $0.25 USDC not received — returns 402 Payment Required
- Ed25519 signing failure — signed attestation may be absent in edge cases
- Market not yet open for the day — same-day distribution may be undefined early UTC
- Network timeout — endpoint returns 5xx if upstream Polymarket feed is unreachable

## How this service works

ETH same-day price distribution from Polymarket — median, quantiles (p10-p90), entropy — Ed25519 signed attestation

## Output

Returns a structured payload containing: the median ETH price implied by Polymarket same-day prediction markets, quantile estimates from p10 through p90 (showing the probability-weighted price range), a Shannon entropy value indicating market uncertainty, and the full dataset signed with an Ed25519 private key for cryptographic attestation and tamper-proofing.

## 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/mycelia-signal-eth-same-day-price-distribution-oracle-0fde42ad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.myceliasignal.com](https://www.zero.xyz/host/api.myceliasignal.com/llms.txt)