simmer-x402Make x402 payments to access paid APIs and gated content. Use when a skill needs to fetch data from x402-gated endpoints (like Kaito mindshare API, Simmer pr...
Install via ClawdBot CLI:
clawdbot install adlai88/simmer-x402Pay for x402-gated APIs using USDC on Base. This skill enables agents to autonomously make crypto payments when accessing paid web resources.
Use this skill when:
export EVM_PRIVATE_KEY=0x...your_private_key... Falls back to WALLET_PRIVATE_KEY if EVM_PRIVATE_KEY is not set (same key Simmer/Polymarket users already have). Your EVM address works on all chains — Polygon for trading, Base for x402 payments.
pip install x402[httpx,evm]| Command | Description |
|---------|-------------|
| python x402_cli.py balance | Check USDC and ETH balances on Base |
| python x402_cli.py fetch | Fetch URL with automatic x402 payment |
| python x402_cli.py fetch | Same but output raw JSON only |
| python x402_cli.py fetch | Show payment info without paying |
| python x402_cli.py fetch | Override max payment limit |
| python x402_cli.py rpc | Make RPC call via Quicknode x402 |
python x402_cli.py balancex402 Wallet Balance
==============================
Address: 0x1234...5678
Network: Base Mainnet
USDC: $42.50
ETH: 0.000000 ETHpython x402_cli.py fetch "https://api.kaito.ai/api/v1/tokens" --jsonpython x402_cli.py fetch "https://api.kaito.ai/api/payg/mindshare?token=BTC&start_date=2026-02-13&end_date=2026-02-14" --jsonpython x402_cli.py fetch "https://api.kaito.ai/api/payg/sentiment?token=BTC&start_date=2026-02-13&end_date=2026-02-14" --jsonpython x402_cli.py fetch "https://api.alphakek.ai/x402/knowledge/ask" \
--method POST --body '{"question": "What is the current sentiment on BTC?", "search_mode": "fast"}' --jsonpython x402_cli.py fetch "https://pro-api.coingecko.com/api/v3/x402/simple/price?ids=bitcoin&vs_currencies=usd" --jsonpython x402_cli.py fetch "https://x402.simmer.markets/api/sdk/context/market-123" \
--header "Authorization: Bearer sk_live_..." --json# Get ETH balance on Ethereum mainnet
python x402_cli.py rpc ethereum-mainnet eth_getBalance 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 latest
# Get latest block on Polygon
python x402_cli.py rpc polygon-mainnet eth_blockNumber
# Get token balance on Base
python x402_cli.py rpc base-mainnet eth_call '{"to":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","data":"0x70a08231000000000000000000000000YOUR_ADDRESS"}' latestQuicknode x402 supports 55+ networks (Ethereum, Polygon, Base, Arbitrum, Solana, Bitcoin, and more). $10 buys 1M RPC credits — each successful call costs 1 credit.
| Provider | Endpoint | Price | Description |
|----------|----------|-------|-------------|
| Kaito | /api/payg/mindshare | $0.02/data point | Token mindshare time series |
| Kaito | /api/payg/sentiment | $0.02/data point | Token sentiment time series |
| Kaito | /api/payg/narrative_mindshare | $0.02/data point | Narrative mindshare time series |
| Kaito | /api/payg/smart_followers | $0.20/request | Smart follower metrics |
| AlphaKek | /x402/knowledge/ask | $0.01/request | AI knowledge engine (POST, search_mode: fast/deep/ultrafast) |
| CoinGecko | /api/v3/x402/simple/price | $0.01/request | Token price data |
| Simmer | /api/sdk/context/:id | $0.005/request | Market context (rate limit bypass) |
| Simmer | /api/sdk/briefing | $0.005/request | Portfolio briefing (rate limit bypass) |
| Quicknode | /:network (55+ networks) | $10/1M credits | Pay-per-request RPC access (no API key needed) |
Kaito API docs: https://github.com/MetaSearch-IO/KaitoX402APIDocs
Quicknode x402 docs: https://x402.quicknode.com/llms.txt
| Setting | Environment Variable | Default | Description |
|---------|---------------------|---------|-------------|
| Wallet key | EVM_PRIVATE_KEY | (required) | Hex-encoded private key (falls back to WALLET_PRIVATE_KEY) |
| Max payment | X402_MAX_PAYMENT_USD | 10.00 | Safety cap per request |
| Network | X402_NETWORK | mainnet | mainnet or testnet |
Or set via config.json in the skill directory:
{
"max_payment_usd": 10.00,
"network": "mainnet"
}All payment handling is automatic via the official Coinbase x402 Python SDK.
Other skills can import x402 functions directly:
from skills.x402.x402_cli import x402_fetch
# Returns parsed JSON response
data = await x402_fetch("https://api.kaito.ai/api/payg/mindshare?token=BTC")x402 Python SDK for payment signingPrivate key safety:
.env file, never pass it inline in shell history.env is in your .gitignore — never commit private keys to git"EVM_PRIVATE_KEY not set"
export EVM_PRIVATE_KEY=0x..."Insufficient USDC balance"
python x402_cli.py balance to check"Payment exceeds max limit"
--max 50 or set X402_MAX_PAYMENT_USD=50"Unsupported network in payment options"
Generated Mar 1, 2026
AI agents can use this skill to access paid APIs like Kaito for real-time token mindshare and sentiment data, enabling automated market analysis and trading insights. This is useful for hedge funds or trading bots that need up-to-date on-chain and social metrics to inform decisions.
Researchers or AI assistants can leverage this skill to query AlphaKek's knowledge engine for fast, deep, or ultrafast answers to complex questions, paying per request. This supports academic, business intelligence, or content creation workflows where accessing premium AI insights is required.
Developers can use the skill to make gasless RPC calls via Quicknode across 55+ networks, accessing blockchain data without API keys. This enables building decentralized applications, monitoring smart contracts, or fetching token balances efficiently with pay-per-request credits.
Content platforms or API providers like Simmer can integrate this skill to offer premium endpoints, bypassing rate limits and monetizing access to market context or portfolio briefings. This allows for scalable, automated payment handling for gated digital content.
Businesses can automate the fetching of premium financial data, such as CoinGecko price feeds, to generate reports or dashboards. The skill handles payments autonomously, reducing manual intervention for accessing paid APIs in financial analytics or portfolio management tools.
This model involves charging users per API call or data point, as seen with Kaito and AlphaKek. Revenue is generated from microtransactions in USDC, enabling scalable monetization for premium data without subscription fees. It's ideal for providers offering high-value, on-demand insights.
By offering RPC access via Quicknode with pay-per-request credits, this model generates revenue from developers needing blockchain data without gas costs or API keys. It supports a wide network range, attracting users from Ethereum to Solana for decentralized application development.
This model monetizes access to gated content or enhanced API tiers, such as Simmer's premium endpoints, by charging small fees per request to bypass free tier limits. It caters to users requiring higher data throughput or exclusive features, driving recurring usage and revenue.
💬 Integration Tip
Ensure the EVM_PRIVATE_KEY is securely set and the wallet is funded with USDC on Base; use the --dry-run flag to test payment requirements before executing real transactions.
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