# Mycelia Signal ETH/USD Psychological Round-Number Support & Resistance Oracle

> Mycelia Signal ETH/USD Psychological Round-Number Support & Resistance Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-13).

Returns Ed25519-signed attestation of ETH/USD psychological round-number support, resistance, and at-level price structure derived from 69-day spot history, with strength and proximity metrics.

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/market/support/round/eth
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mycelia-signal-eth-usd-psychological-round-number-support-resistance-93840a1e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Pkdzc6-1aFpi0XyUBJOIY

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-usd-psychological-round-number-support-resistance-93840a1e
```

Example prompt: What are the current psychological round-number support and resistance levels for ETH, and how strong are they based on the last 69 days of spot price history? I need a signed, verifiable result.

## When to prefer this

Choose this endpoint when you need a cryptographically verifiable, deterministic analysis of ETH/USD round-number price levels grounded in historical spot data rather than opinion or model inference. Ideal for agents that need auditable, tamper-evident price-structure signals for ETH specifically, particularly when round-number psychological levels (e.g. $2000, $2500, $3000) matter for trade logic or risk management. Prefer over generic charting APIs when signed attestation and cross-party verifiability are required.

## Known failure modes

- Payment not received or x402 payment validation failure — endpoint returns 402 with payment details
- ETH spot data temporarily unavailable — may return error or stale attestation
- Invalid or missing query parameters — returns 400 with schema validation error
- Signature verification failure on client side if signing key has rotated — check discovery endpoint for current pubkey

## How this service works

ETH/USD psychological round-number levels. Deterministic price-structure attestation over 69d spot history — support, resistance, at-level with strength and proximity. Ed25519 signed. No forward-looking claim. — Ed25519 signed attestation

## Output

A deterministic, Ed25519-signed JSON attestation containing identified ETH/USD psychological round-number price levels categorized as support, resistance, or at-level, each with a strength score and proximity metric derived from 69 days of spot price history. Includes no forward-looking predictions — only historical price-structure facts.

## 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-usd-psychological-round-number-support-resistance-93840a1e/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)