Curve Finance APY data via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides Curve Finance APY (annual percentage yield) data through an x402-gated API at `https://lowpaymentfee.com/api/v1/defi/curve/apy`. Each request costs $0.02 in USDC on the Base network, with no API keys, rate limits, or subscriptions required — callers simply attach an x402 payment header to each POST request.
The endpoint is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com spanning DeFi data, analytics, AI/ML inference, finance, and utility services, all priced at $0.02 per request. The x402 challenge confirms the endpoint is live, accepting USDC (contract `0x8335…2913`) on Base with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment timeout is 300 seconds.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of the response format beyond the `application/json` MIME type declared in the x402 challenge. The specific fields returned (e.g., pool names, APY percentages, TVL) are unknown and must be discovered by making a paid call.
Capabilities
Use cases
- —Fetching current Curve Finance pool APYs for yield-farming dashboards
- —Comparing DeFi yields across protocols by pulling Curve APY data programmatically
- —Automated portfolio rebalancing agents that need real-time Curve yield information
- —Research and analytics on historical or current Curve pool performance
Fit
Best for
- —Agents or bots needing on-demand Curve APY data without API key management
- —Developers building DeFi dashboards who prefer pay-per-call pricing
- —Low-volume consumers who want no subscription commitment for DeFi data
Not for
- —High-frequency trading systems that need sub-second latency and free bulk access
- —Users who need comprehensive Curve protocol data beyond APY (e.g., swap routing, on-chain events)
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/curve/apy \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation, no example requests or responses, and no description of what fields the endpoint actually returns. Effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no technical content
- —The specific endpoint /api/v1/defi/curve/apy is not listed on the provider's homepage; it may be undocumented or experimental
- —No example request or response payloads could be obtained without making a paid call
Citations
- —The endpoint returns HTTP 402 with an x402 challenge requiring USDC payment on Basehttps://lowpaymentfee.com/api/v1/defi/curve/apy
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02https://lowpaymentfee.com/api/v1/defi/curve/apy
- —The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/defi/curve/apy