coinrailz 1.2.0

Non-custodial USDC payment SDK for AI agents with 76 bundled x402 intelligence services across Base and Solana. Official ElizaOS support.

coinrailz

AI Agent Payment Processing SDK - Non-custodial USDC payments for AI agents with bundled intelligence services.

Features

• Non-custodial: Your wallet, your keys. We never custody funds.
• Yield-while-trading: Earn USDC yield (Kamino ~3.4% APY / Aave) while your agent spends.
• Low fees: 1.5% + $0.01 per transaction ($0.05 minimum)
• Multi-chain: Base and Solana primary, with Ethereum, Polygon, Arbitrum support.
• Intelligence bundle: 66 x402 microservices covering NASA satellite data, prediction markets, and AI.
• CDP wallets: Automatic wallet creation via Coinbase Developer Platform.
• Official ElizaOS Plugin: Deep integration with the leading AI agent framework.
• Type-safe: Full Pydantic models for all API responses.

Installation

pip install coinrailz

Get Your API Key

Instant API Key - Pay $1 (USDC/USDT on Base or Solana) and get your API key immediately. No account required!

1. Visit https://coinrailz.com/api-keys
2. Send $1 to the platform wallet
3. Verify your transaction and receive your key + $5 starter credits

Key Persistence: Your API key is permanent and works across ALL services. One key = unlimited access (credits are deducted per use). You can top up credits anytime with the same key.

Quick Start

from coinrailz import CoinRailz

# Initialize the client
client = CoinRailz(api_key="cr_live_...")  # Get your API key at https://coinrailz.com/api-keys

# Send a payment (1.5% + $0.01 fee)
result = client.send(
    to="0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
    amount=100,
    memo="Service payment"
)

if result.success:
    print(f"Payment sent: {result.transaction_id}")
    print(f"Fee: ${result.fee}")
    print(f"Net amount: ${result.net_amount}")

API Reference

Initialization

from coinrailz import CoinRailz

client = CoinRailz(
    api_key="cr_live_...",  # Required
    base_url="https://coinrailz.com",  # Optional, for self-hosted
    timeout=30,  # Optional, request timeout in seconds
    enable_intelligence=False  # Optional, enable x402 intelligence services
)

Send Payment

Send USDC to an address. Fee: 1.5% + $0.01

result = client.send(
    to="0x...",  # Recipient address
    amount=100,  # Amount in USDC
    currency="USDC",  # Optional, default USDC
    memo="Payment for services",  # Optional
    metadata={"order_id": "123"}  # Optional, custom data
)

# Response (SendPaymentResult)
# result.success = True
# result.transaction_id = "sdk_tx_..."
# result.status = "pending"
# result.amount = 100
# result.fee = 1.51
# result.net_amount = 98.49
# result.fee_breakdown.rate = "1.5% + $0.01"

Create Invoice

Create a payment invoice for receiving funds.

invoice = client.create_invoice(
    amount=50,
    description="AI assistant service fee",
    expires_in=15  # Minutes, default 15
)

# Response (InvoiceResult)
# invoice.invoice_id = "sdk_inv_..."
# invoice.payment_address = "0x..."
# invoice.status = "pending"

Get Reports

Get activity reports for your account.

report = client.get_reports(
    period="weekly",  # "daily" | "weekly" | "monthly"
    format="json"  # "json" | "markdown"
)

# Response (ReportResult)
# report.summary.total_transactions = 42
# report.summary.total_volume_usd = 5280.50

Get Balance

Get your wallet balance.

balance = client.get_balance()

# Response (BalanceResult)
# balance.balances.USDC = 1250.00
# balance.balances.ETH = 0.05

Create Wallet

Create a new CDP wallet.

wallet = client.create_wallet()

# Response (WalletResult)
# wallet.wallet_id = "sdk_wallet_..."
# wallet.address = "0x..."
# wallet.status = "active"

Intelligence Services

Access 41 bundled x402 microservices (requires bundle subscription or +0.35% per call).

client = CoinRailz(
    api_key="cr_live_...",
    enable_intelligence=True
)

# Get wallet risk score
risk = client.intelligence("wallet-risk", {"address": "0x..."})

# Get trade signals
signals = client.intelligence("trade-signals", {"token": "ETH"})

# Get token sentiment
sentiment = client.intelligence("token-sentiment", {"token": "BTC"})

Context Manager

The client supports context manager protocol for automatic cleanup:

with CoinRailz(api_key="cr_live_...") as client:
    result = client.send(to="0x...", amount=100)

Error Handling

All API errors return machine-readable structured responses for programmatic handling:

from coinrailz import CoinRailz

result = client.send(to="0x...", amount=100)

if not result.success:
    print(f"Error code: {result.error.code}")
    print(f"Message: {result.error.human_message}")
    print(f"Hint: {result.error.agent_hint}")
    print(f"Recoverable: {result.error.recoverable}")
    
    # Programmatic error handling
    if result.error.code == "PAYMENT_INVALID_TX_HASH_LENGTH":
        # Transaction hash is wrong length
        pass
    elif result.error.code == "PAYMENT_VERIFICATION_FAILED":
        # On-chain verification returned false
        pass
    elif result.error.code == "INSUFFICIENT_CREDITS":
        # Top up credits at coinrailz.com/api-keys
        pass
    elif result.error.code == "RATE_LIMITED":
        # Wait and retry
        import time
        time.sleep(result.error.retry_after or 60)

Error Response Schema

@dataclass
class ErrorResponse:
    code: str           # Stable error identifier for switch statements
    http_status: int    # HTTP status code
    human_message: str  # Human-readable explanation
    agent_hint: str     # Actionable fix suggestion for AI agents
    recoverable: bool   # Whether retrying may succeed
    telemetry_id: str   # Support ticket reference

Error Codes Reference

Code	Description	Recoverable
PAYMENT_HEADER_MISSING	X-PAYMENT header is empty	Yes
PAYMENT_INVALID_TX_HASH_LENGTH	Transaction hash wrong length	Yes
PAYMENT_INVALID_TX_HASH_FORMAT	Invalid characters in hash	Yes
PAYMENT_DECODE_FAILED	Could not decode payment payload	Yes
PAYMENT_VERIFICATION_FAILED	On-chain verification returned false	No
PAYMENT_VERIFICATION_EXCEPTION	Verification threw an error	Maybe
INSUFFICIENT_CREDITS	Not enough credits for operation	Yes
INVALID_API_KEY	API key not found or expired	No
RATE_LIMITED	Too many requests	Yes

Pricing

Tier	Volume	Processing Fee
Starter	$0-$10K/mo	1.5% + $0.01
Growth	$10K-$100K/mo	1.25% + $0.01
Platform	$100K+/mo	0.9% + $0.01

Intelligence Bundle: +0.35% per transaction OR $79/month flat

Transaction Limits

• Minimum transaction: $0.05 USDC
• Maximum transaction: $100,000 USDC (contact sales for higher limits)

Refunds & Disputes

Due to the non-custodial nature of blockchain transactions:

• Refunds are not supported - All blockchain transactions are final and irreversible
• Disputes: For transaction issues, contact [e-mail] with your transaction ID
• Prevention: Always verify recipient addresses before sending

Legal

This SDK provides non-custodial payment routing. Coin Railz does not hold, custody, or control user funds at any time. Users maintain full control of their wallets and private keys.

See Terms of Service for full legal terms.

Support

• Documentation: https://coinrailz.com/docs/sdk
• Discord: https://discord.gg/coinrailz
• Email: [e-mail]

License

MIT License - see LICENSE for details.