langchain-mycelia-signal 1.3.2

LangChain tools for Mycelia Signal — cryptographically signed price oracles with automatic x402 (USDC on Base) payment

langchain-mycelia-signal

LangChain tools for Mycelia Signal — cryptographically signed price oracles with automatic x402 (USDC on Base) payment.

56 endpoints across crypto, FX, precious metals, US/EU macro, and commodities. No API keys. No accounts. Install and go.

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Installation

pip install langchain-mycelia-signal

For paid mode (signed attestations with automatic x402 payment):

pip install langchain-mycelia-signal[paid]

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Quick Start

from langchain_mycelia_signal import MyceliaSignalTools
from langchain.agents import AgentExecutor, create_tool_calling_agent
from langchain_openai import ChatOpenAI

# Get tools
tools = MyceliaSignalTools().as_list()

# Build your agent
llm = ChatOpenAI(model="gpt-4o")
agent = create_tool_calling_agent(llm, tools, prompt)
executor = AgentExecutor(agent=agent, tools=tools)

# Ask naturally
result = executor.invoke({"input": "What is the Bitcoin price right now?"})
result = executor.invoke({"input": "What is the current US CPI?"})
result = executor.invoke({"input": "What is the EUR/USD rate?"})

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Free vs Paid Mode

Free mode (default — no config needed)

Returns price data without a cryptographic signature. Data may be up to 5 minutes stale.

tools = MyceliaSignalTools()
print(tools.mode)  # "free"

Paid mode — signed attestations

Add your Base wallet private key to your .env:

MYCELIA_WALLET_PRIVATE_KEY=0x...

The tool detects the key automatically and switches to paid endpoints. Payment is handled internally via x402. No code changes required.

tools = MyceliaSignalTools()
print(tools.mode)  # "paid"

Signed responses include a cryptographic signature (Ed25519) verifiable against the published public key. See verification docs.

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Supported Pairs (56 endpoints)

Crypto Spot — $0.01 per query

Pair	Description
BTCUSD	Bitcoin / USD (median, 9 sources)
BTCEUR	Bitcoin / EUR (cross-rate + direct feeds)
BTCJPY	Bitcoin / JPY
ETHUSD	Ethereum / USD (median, 5 sources)
ETHEUR	Ethereum / EUR (hybrid)
ETHJPY	Ethereum / JPY
SOLUSD	Solana / USD (median, 9 sources)
SOLEUR	Solana / EUR (hybrid)
SOLJPY	Solana / JPY
XRPUSD	XRP / USD
ADAUSD	Cardano / USD
DOGEUSD	Dogecoin / USD

Crypto VWAP — $0.02 per query

Pair	Description
BTCUSD_VWAP	Bitcoin / USD 5-min VWAP
BTCEUR_VWAP	Bitcoin / EUR 5-min VWAP

Precious Metals — $0.01 per query

Pair	Description
XAUUSD	Gold / USD (median, 8 sources)
XAUEUR	Gold / EUR
XAUJPY	Gold / JPY

FX Pairs — $0.01 per query

Pairs
EURUSD, EURJPY, EURGBP, EURCHF, EURCNY, EURCAD
GBPUSD, GBPJPY, GBPCHF, GBPCNY, GBPCAD
USDJPY, USDCHF, USDCNY, USDCAD
CHFJPY, CHFCAD, CNYJPY, CNYCAD, CADJPY

US Economic Indicators — $1.00 per query

Indicator	Description
US_CPI	Consumer Price Index (BLS)
US_CPI_CORE	CPI Core (ex food & energy)
US_UNRATE	Unemployment Rate
US_NFP	Nonfarm Payrolls
US_FEDFUNDS	Federal Funds Rate
US_GDP	GDP
US_PCE	PCE Price Index
US_YIELD_CURVE	10Y-2Y Yield Spread

EU Economic Indicators — $1.00 per query

Indicator	Description
EU_HICP	HICP Inflation (Eurostat)
EU_HICP_CORE	HICP Core
EU_HICP_SERVICES	HICP Services
EU_UNRATE	Unemployment Rate
EU_GDP	GDP
EU_EMPLOYMENT	Employment

Commodities — $1.00 per query

Indicator	Description
WTI	WTI Crude Oil
BRENT	Brent Crude Oil
NATGAS	Henry Hub Natural Gas
COPPER	Copper
DXY	US Dollar Index

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Example Response

Free mode:

Pair:      BTC/USD
Price:     84231.50 USD
Timestamp: 1741521600
Sources:   binance,binance_us,bitfinex,bitstamp,coinbase,gateio,gemini,kraken,okx
Method:    median
Signed:    False

Paid mode:

Pair:      BTCUSD
Price:     84231.50 USD
Timestamp: 1741521600
Sources:   binance,binance_us,bitfinex,bitstamp,coinbase,gateio,gemini,kraken,okx
Method:    median
Signed:    True
Signature: MEUCIQD...
Pubkey:    03c1955b8c543494c4ecd86d167105bcc7ca9a91b8e06cb9d6601f2f55a89abfbf
Canonical: v1|PRICE|BTCUSD|84231.50|USD|2|1741521600|562204|binance,binance_us,...|median

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Direct Tool Use

from langchain_mycelia_signal import get_mycelia_price

result = get_mycelia_price.invoke({"pair": "BTCUSD"})
result = get_mycelia_price.invoke({"pair": "US_CPI"})
result = get_mycelia_price.invoke({"pair": "WTI"})
print(result)

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Links

• Documentation
• x402 Integration Guide
• Signature Verification
• All Endpoints
• GitHub

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License

MIT