solvela-sdk 0.2.0

Solana-native payment gateway for AI agents — pay for LLM calls with USDC, no API keys

solvela

Python SDK for Solvela — a Solana-native AI agent payment gateway. AI agents pay for LLM API calls with USDC-SPL on Solana via the x402 protocol.

Installation

pip install solvela-sdk

For development:

pip install -e ".[dev]"

Quick Start

import asyncio
from solvela import SolvelaClient, ClientConfig, Wallet

async def main():
    wallet, mnemonic = Wallet.create()
    print(f"Wallet: {wallet.address()}")
    print(f"Mnemonic (save this!): {mnemonic}")

    config = ClientConfig(gateway_url="http://localhost:8402")
    client = SolvelaClient(config=config, wallet=wallet)

    # List available models
    models = await client.models()
    for m in models:
        print(f"  {m.id} — {m.display_name}")

    # Estimate cost (triggers 402)
    cost = await client.estimate_cost("gpt-4o")
    print(f"Cost: {cost.cost_breakdown.total} {cost.cost_breakdown.currency}")

asyncio.run(main())

OpenAI-Compatible Interface

from solvela import SolvelaClient
from solvela.openai_compat import OpenAICompat

client = SolvelaClient()
openai = OpenAICompat(client)

# Same interface as the OpenAI Python SDK
response = await openai.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Hello!"}],
)

Smart Features

• Response caching — enable_cache=True deduplicates identical requests
• Session tracking — enable_sessions=True tracks conversation context with three-strike escalation
• Quality checks — enable_quality_check=True detects degraded responses and retries
• Balance guard — automatic fallback to free models when USDC balance hits zero
• Balance monitor — background polling with low-balance callbacks

Configuration

from solvela import ClientConfig, ClientBuilder

# Dataclass
config = ClientConfig(
    gateway_url="http://localhost:8402",
    enable_cache=True,
    enable_sessions=True,
    enable_quality_check=True,
    free_fallback_model="deepseek-chat",
    max_payment_amount=100_000,  # atomic USDC (0.10 USDC)
)

# Fluent builder
config = (
    ClientBuilder()
    .gateway_url("http://localhost:8402")
    .enable_cache(True)
    .max_payment_amount(100_000)
    .build()
)

Running Tests

# Unit + integration tests
pytest tests/unit/ tests/integration/ -v

# Live contract tests (requires running gateway)
SOLVELA_LIVE_TESTS=1 pytest tests/live/ -v

# Linting
ruff check src/ tests/

License

MIT