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

> Mycelia Signal BTC/USD 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 2026-09-14).

Returns Ed25519-signed attestations of BTC/USD psychological round-number price levels (support, resistance, at-level) with strength and proximity scores derived from 69 days of spot history.

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/market/support/round/btc
- Price: $0.15/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-btc-usd-round-number-support-resistance-oracle-693b913c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NLag0BbcX-iiYiymKZrH3

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-btc-usd-round-number-support-resistance-oracle-693b913c
```

Example prompt: What are the current BTC/USD psychological round-number support and resistance levels, and how close is Bitcoin to each one? I want the cryptographically signed result.

## When to prefer this

Choose this endpoint when you need a tamper-evident, cryptographically signed attestation of Bitcoin's round-number price structure rather than a raw data feed or a predictive signal. Ideal for agents that must audit-trail their market data, verify signal provenance, or trade at psychological price levels without relying on forward-looking claims. Prefer this over generic price feeds when round-number support/resistance classification and strength scoring are specifically needed.

## Known failure modes

- Payment failure (402) if the $0.15 USDC x402 payment header is missing or invalid
- Stale data if the 69-day spot history feed is delayed or unavailable
- Signature verification failure if the Ed25519 public key is not matched against the discovery endpoint
- Empty or minimal level set if BTC price history lacks clear round-number clustering
- Rate limiting or service unavailability returning 5xx errors

## How this service works

BTC/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 BTC/USD round-number price levels categorized as support, resistance, or at-level, each annotated with a strength score and proximity measurement, derived from 69 days of spot price history. Includes no forward-looking predictions — purely historical price-structure analysis.

## 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-btc-usd-round-number-support-resistance-oracle-693b913c/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)