Crypto Price Feed API, FX Rates API & Bitcoin DLC Oracle

HTTP-native financial data and DLC oracle for AI agents, autonomous systems, and developers. Cryptographically signed. Pay per query.

What is Mycelia Signal?

Mycelia Signal is a sovereign cryptographic oracle — a real-time financial data API that delivers cryptographically signed price data over standard HTTP. Every response includes a canonical data string, the data sources used, the aggregation method, a Unix timestamp, and a cryptographic signature you can independently verify.

Unlike traditional oracle networks that require EVM smart contracts and proprietary tokens, Mycelia Signal works with any HTTP client — including AI agents, Python scripts, Node.js applications, and agentic frameworks like ElizaOS and LangChain.

Crypto Price Feed API

14 cryptocurrency pairs including Bitcoin, Ethereum, Solana, XRP, ADA, and DOGE. Spot prices aggregated from up to 9 exchanges using median aggregation to eliminate outliers. VWAP variants available for BTC and ETH.

Available crypto pairs: BTC/USD, BTC/EUR, BTC/JPY, ETH/USD, ETH/EUR, ETH/JPY, SOL/USD, SOL/EUR, SOL/JPY, XRP/USD, ADA/USD, DOGE/USD — plus VWAP variants for BTC and ETH.

FX Rates API

20 foreign exchange pairs covering USD, EUR, GBP, JPY, CHF, CAD, and CNY. Sourced from central banks (ECB via Frankfurter, Bank of Canada, RBA, Norges Bank) and major exchanges. Four-tier source hierarchy for reliability.

Macro & Economic Data API

14 macroeconomic indicators from primary government sources — US Bureau of Labor Statistics, Federal Reserve (FRED), Bureau of Economic Analysis, and Eurostat. Signed canonical strings include the series ID, vintage date, and source agency.

US indicators: CPI (headline & core), Unemployment Rate, Nonfarm Payrolls, Fed Funds Rate, Real GDP, PCE Price Index, 10Y–2Y Yield Curve Spread.

EU indicators: HICP (headline, core, services), Unemployment Rate, Real GDP, Total Employment.

Bitcoin DLC Oracle

Mycelia Signal is the only production HTTP DLC oracle — delivering cryptographically attested price data for Discreet Log Contracts over standard HTTP, payable natively in Lightning sats or USDC. No other DLC oracle offers HTTP-native access with per-query micropayment.

Discreet Log Contracts (DLCs) are Bitcoin-native smart contracts that settle based on real-world price events. They require a trusted oracle to publish a signed attestation at a predetermined time. Mycelia Signal's DLC oracle provides those attestations — signed, verifiable, and accessible over HTTP to any client.

How it works

Mycelia Signal is a standard REST API over HTTPS. Every paid request follows the same pattern:

# 1. Request without payment — receive 402 with payment options
GET /oracle/price/btc/usd HTTP/1.1
Host: api.myceliasignal.com

# 402 response contains Lightning invoice (L402) or USDC details (x402)

# 2. Pay via Lightning (L402)
GET /oracle/price/btc/usd HTTP/1.1
Authorization: L402 <macaroon>:<preimage>

# 3. Receive signed canonical response
{
  "canonical": "v1|PRICE|BTCUSD|84231.50|USD|2|binance,coinbase,kraken|median|1741521600|562204",
  "signature": "...",
  "pubkey": "03c1955b..."
}

The canonical string format encodes the data type, pair, value, currency, decimal places, sources, aggregation method, Unix timestamp, and a nonce. The SHA-256 hash of this string is signed. Verification is straightforward with any secp256k1 or Ed25519 library.

Payment — Lightning or USDC, per query

Mycelia Signal supports two machine-native payment standards with no account or subscription required:

Both payment rails are verified end-to-end. The x402 discovery file at /.well-known/x402 lists all 56 endpoints with pricing for automated agent discovery.

Built for AI agents

Mycelia Signal is designed for autonomous systems that need financial data without human intervention. The API supports the full agent discovery stack:

Code example — fetch BTC/USD with x402

import requests

# Step 1 — probe for payment details
r = requests.get("https://api.myceliasignal.com/oracle/price/btc/usd")
# r.status_code == 402
payment = r.json()["x402"]

# Step 2 — construct EIP-3009 payment (see x402 docs)
x_payment = build_x402_payment(payment)

# Step 3 — request with payment header
r = requests.get(
    "https://api.myceliasignal.com/oracle/price/btc/usd",
    headers={"X-Payment": x_payment}
)

data = r.json()
canonical = data["canonical"]
price = canonical.split("|")[3]  # "84231.50"
print(f"BTC/USD: {price}")