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Base DeFi Yield Optimizer API
Base chain DeFi yields -- Aerodrome LP, Moonwell lending, top farms ranked by APY with TVL and risk. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
Quickstart -- MCP
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
{
"mcpServers": {
"base-defi": {
"url": "https://base-defi.api.klymax402.com/mcp"
}
}
}Quickstart -- HTTP (x402)
curl "https://base-defi.api.klymax402.com/api/opportunities"
# -> 402 Payment Required, with an x402 payment challenge in the response bodyAny x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.
Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
base_get_defi_opportunities | GET | /api/opportunities | $0.008 | Get DeFi yield opportunities on Base chain |
base_get_defi_opportunities | POST | /api/opportunities | $0.008 | Get DeFi yield opportunities on Base chain (POST variant) |
base_get_defi_opportunities
Use this when you need DeFi yield opportunities specifically on Base chain. Returns Base-native protocol yields in JSON.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
protocol | string | no | Filter by protocol: 'all', 'aerodrome', or 'moonwell'. Defaults to 'all'. |
Returns
opportunities-- array of yield farms ranked by APYprotocol-- protocol name (Aerodrome, Moonwell)pool-- pool name and token pairapy-- current annual percentage yieldtvl-- total value locked in USDriskScore-- risk rating (1-10, lower is safer)type-- yield type (LP, lending, staking)
Example response:
{"opportunities":[{"protocol":"Aerodrome","pool":"USDC/WETH","apy":18.5,"tvl":45000000,"riskScore":3,"type":"LP"},{"protocol":"Moonwell","pool":"USDC Lending","apy":5.2,"tvl":120000000,"riskScore":1,"type":"lending"}],"chain":"base","totalPools":12}When to use: deploying capital on Base chain specifically. Curated list of vetted Base-native protocols only.
Not for: swap quotes on Base (use dex_get_swap_quote), liquidation risk (use defi_get_liquidation_levels).
base_get_defi_opportunities
Use this when you need DeFi yield opportunities specifically on Base chain. Returns Base-native protocol yields in JSON. POST variant of base_get_defi_opportunities -- same params passed as JSON body instead of query string.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
protocol | string | no | Filter by protocol: 'all', 'aerodrome', or 'moonwell'. Defaults to 'all'. |
Returns
opportunities-- array of yield farms ranked by APYprotocol-- protocol name (Aerodrome, Moonwell)pool-- pool name and token pairapy-- current annual percentage yieldtvl-- total value locked in USDriskScore-- risk rating (1-10, lower is safer)type-- yield type (LP, lending, staking)
Example response:
{"opportunities":[{"protocol":"Aerodrome","pool":"USDC/WETH","apy":18.5,"tvl":45000000,"riskScore":3,"type":"LP"},{"protocol":"Moonwell","pool":"USDC Lending","apy":5.2,"tvl":120000000,"riskScore":1,"type":"lending"}],"chain":"base","totalPools":12}When to use: deploying capital on Base chain specifically. Curated list of vetted Base-native protocols only.
Not for: swap quotes on Base (use dex_get_swap_quote), liquidation risk (use defi_get_liquidation_levels).
Example agent prompts
- "DeFi yield opportunities specifically on Base chain"
- "DeFi yield opportunities specifically on Base chain"
Payment
- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (
eip155:8453) - Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)
Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT