Mycelia Signal — Sovereign Oracle

Pay sats. Pay USDC. Get signed data. Trust math, not middlemen.

Mycelia Signal is a sovereign price oracle serving cryptographically signed attestations over two payment protocols: Lightning (L402) and USDC on Base (x402). 66 endpoints across crypto pairs, stablecoin pegs, FX rates, economic indicators, commodities, MSVI volatility index, MSXI sentiment index, and MSSI stress index. No API keys. No accounts. No trust assumptions.

Live API: api.myceliasignal.com
Docs: myceliasignal.com/docs

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Try It Now

# Free preview — no payment required
curl https://api.myceliasignal.com/oracle/price/btc/usd/preview
curl https://api.myceliasignal.com/oracle/econ/us/cpi/preview

# Paid — get a 402 with Lightning invoice
curl -i https://api.myceliasignal.com/oracle/price/btc/usd

# Health check
curl https://api.myceliasignal.com/health

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Endpoints (61 total)

All endpoints available on both L402 (Lightning) and x402 (USDC on Base). Append /preview to any paid endpoint for free unsigned sample data.

Crypto Pairs (16 endpoints)

Endpoint	Description	Price
/oracle/price/btc/usd	BTC/USD spot — 9 exchanges	10 sats / $0.01
/oracle/price/btc/usd/vwap	BTC/USD 5-min VWAP	20 sats / $0.02
/oracle/price/btc/eur	BTC/EUR spot	10 sats / $0.01
/oracle/price/btc/eur/vwap	BTC/EUR VWAP	20 sats / $0.02
/oracle/price/btc/jpy	BTC/JPY spot	10 sats / $0.01
/oracle/price/btc/jpy/vwap	BTC/JPY VWAP	20 sats / $0.02
/oracle/price/eth/usd	ETH/USD spot	10 sats / $0.01
/oracle/price/eth/usd/vwap	ETH/USD 5-min VWAP	20 sats / $0.02
/oracle/price/eth/eur	ETH/EUR spot	10 sats / $0.01
/oracle/price/eth/jpy	ETH/JPY spot	10 sats / $0.01
/oracle/price/sol/usd	SOL/USD spot	10 sats / $0.01
/oracle/price/sol/eur	SOL/EUR spot	10 sats / $0.01
/oracle/price/sol/jpy	SOL/JPY spot	10 sats / $0.01
/oracle/price/xrp/usd	XRP/USD spot	10 sats / $0.01
/oracle/price/ada/usd	ADA/USD spot	10 sats / $0.01
/oracle/price/doge/usd	DOGE/USD spot	10 sats / $0.01

Stablecoin Pegs (4 endpoints)

• GET /oracle/price/usdt/usd — USDT/USD peg (4-source median, 5dp precision)
• GET /oracle/price/usdc/usd — USDC/USD peg (4-source median, 5dp precision)
• GET /oracle/price/usdt/eur — USDT/EUR derived cross-rate (5dp precision)
• GET /oracle/price/usdt/jpy — USDT/JPY derived cross-rate (5dp precision)

Precious Metals (3 endpoints)

Endpoint	Description	Price
/oracle/price/xau/usd	Gold/USD — 8 sources	10 sats / $0.01
/oracle/price/xau/eur	Gold/EUR cross-rate	10 sats / $0.01
/oracle/price/xau/jpy	Gold/JPY cross-rate	10 sats / $0.01

FX Rates (19 endpoints)

EUR/USD, EUR/JPY, EUR/GBP, EUR/CHF, EUR/CNY, EUR/CAD, GBP/USD, GBP/JPY, GBP/CHF, GBP/CNY, GBP/CAD, USD/JPY, USD/CHF, USD/CNY, USD/CAD, CHF/JPY, CHF/CAD, CNY/JPY, CAD/JPY — all 10 sats / $0.01

US Economic Indicators (8 endpoints)

Endpoint	Description	Price
/oracle/econ/us/cpi	US CPI (BLS)	1000 sats / $0.10
/oracle/econ/us/cpi_core	US CPI Core	1000 sats / $0.10
/oracle/econ/us/unrate	Unemployment Rate	1000 sats / $0.10
/oracle/econ/us/nfp	Nonfarm Payrolls	1000 sats / $0.10
/oracle/econ/us/fedfunds	Fed Funds Rate	1000 sats / $0.10
/oracle/econ/us/gdp	GDP (BEA/FRED)	1000 sats / $0.10
/oracle/econ/us/pce	PCE Price Index	1000 sats / $0.10
/oracle/econ/us/yield_curve	10Y-2Y Spread	1000 sats / $0.10

EU Economic Indicators (6 endpoints)

Endpoint	Description	Price
/oracle/econ/eu/hicp	HICP Headline (Eurostat)	1000 sats / $0.10
/oracle/econ/eu/hicp_core	HICP Core	1000 sats / $0.10
/oracle/econ/eu/hicp_services	HICP Services	1000 sats / $0.10
/oracle/econ/eu/unrate	EU Unemployment	1000 sats / $0.10
/oracle/econ/eu/gdp	EU GDP	1000 sats / $0.10
/oracle/econ/eu/employment	EU Employment	1000 sats / $0.10

Commodities (5 endpoints)

Endpoint	Description	Price
/oracle/econ/commodities/wti	WTI Crude (EIA/FRED)	1000 sats / $0.10
/oracle/econ/commodities/brent	Brent Crude	1000 sats / $0.10
/oracle/econ/commodities/natgas	Henry Hub NatGas	1000 sats / $0.10
/oracle/econ/commodities/copper	Copper (FRED)	1000 sats / $0.10
/oracle/econ/commodities/dxy	US Dollar Index	1000 sats / $0.10

Legacy Redirects

Old paths (/oracle/btcusd, /sho/oracle/btcusd etc.) redirect 301 permanently to new namespace.

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Architecture

Stack (both GCs)

nginx (TLS termination via Cloudflare)
  ├── x402-proxy (Python, :8402) — USDC payments, Ed25519 signing, /internal/sign/* sidecar
  ├── l402-proxy (Go, :8080) — Lightning payments via Voltage node
  ├── price-service (Go, :9200) — 37 price pairs, multi-exchange aggregation
  ├── econ-us (Go, :9129) — 8 US indicators (BLS/FRED)
  ├── econ-eu (Go, :9130) — 6 EU indicators (Eurostat)
  └── econ-commodities (Go, :9134) — 5 commodities (EIA/FRED)

Payment Rails

• L402 (Lightning): Client gets 402 with Lightning invoice + macaroon. Pays invoice, retries with Authorization: L402 <macaroon>:<preimage>. Response signed with secp256k1 ECDSA.
• x402 (USDC on Base): Client gets 402 with USDC payment details. Signs EIP-3009 transfer, retries with X-Payment header. Response signed with Ed25519.

Signing Architecture

L402 and x402 use separate per-instance keypairs. The x402 proxy acts as a signing sidecar for both rails — L402 Go proxy routes paid requests through /internal/sign/* after payment verification.

Rail	Scheme	Key Format
L402	secp256k1 ECDSA	33-byte compressed hex
x402	Ed25519	32-byte hex

Canonical Response Format

Every signed response contains:

{
  "canonical": "v1|PRICE|BTCUSD|84231.50|USD|2|binance,...|median|1741514400|482910",
  "signature": "<base64-encoded>",
  "pubkey": "<hex-pubkey>",
  "signing_scheme": "secp256k1_ecdsa"
}

Canonical format: VERSION|TYPE|<payload>|TIMESTAMP|NONCE

See Canonical Format docs for full specification.

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Infrastructure

GC Nodes

	US GC	Asia GC
Provider	GCP us-central1-a	GCP asia-east1-b
IP	104.197.109.246	34.80.169.18
secp256k1 pubkey	03c1955b8c...	02b1377c30...

Monitoring

• Grafana + Prometheus on US GC (permanent)
• Asia Prometheus federates to US Prometheus
• Blackbox Exporter for public endpoint probing
• Uptime Robot monitoring https://api.myceliasignal.com/health

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Verification

L402 (secp256k1 ECDSA) — Python

import hashlib, base64
from coincurve import PublicKey

def verify(response):
    msg_hash = hashlib.sha256(response["canonical"].encode()).digest()
    pubkey = PublicKey(bytes.fromhex(response["pubkey"]))
    return pubkey.verify(base64.b64decode(response["signature"]), msg_hash, hasher=None)

x402 (Ed25519) — Python

import hashlib, base64
from nacl.signing import VerifyKey
from nacl.encoding import RawEncoder

def verify(response):
    msg_hash = hashlib.sha256(response["canonical"].encode()).digest()
    vk = VerifyKey(bytes.fromhex(response["pubkey"]), encoder=RawEncoder)
    try:
        vk.verify(msg_hash, base64.b64decode(response["signature"]))
        return True
    except Exception:
        return False

Full verification guide: myceliasignal.com/docs/verification

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Integrations

• ElizaOS plugin: @jonathanbulkeley/plugin-mycelia-signal — npm
• LangChain plugin: langchain-mycelia-signal — coming soon
• MCP server: Claude Desktop integration — coming soon
• Satring: L402 directory listing — satring.com

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Links

• Website: myceliasignal.com
• Docs: myceliasignal.com/docs
• API: api.myceliasignal.com
• x402 discovery: api.myceliasignal.com/.well-known/x402

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License

MIT