Balancer protocol APY data via pay-per-call x402 on Base (USDC).
What it does
This endpoint at lowpaymentfee.com provides Balancer DeFi protocol APY (annual percentage yield) data through a pay-per-request x402 payment model. Each call costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required. The endpoint accepts POST requests and returns JSON.
The provider (lowpaymentfee.com) hosts a broad catalog of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced uniformly at $0.02 per request. This specific endpoint sits in the Finance & Web3 category and focuses on Balancer pool yield metrics. However, documentation beyond the landing page is essentially empty (docs, pricing, and README pages all render only a "Connect wallet" prompt), so the exact request body schema and response format are undocumented. The x402 challenge confirms the endpoint is live, uses x402 version 1 with the "exact" payment scheme, settles in USDC (contract 0x8335…2913) on Base, and allows a 300-second payment timeout.
Because no OpenAPI spec, request/response examples, or detailed documentation were found, agents should expect to experiment with the POST body to discover accepted parameters. The endpoint is discoverable and live, but treat it as lightly documented.
Capabilities
Use cases
- —Fetching current Balancer pool APY for portfolio dashboards
- —Comparing DeFi yield opportunities across protocols
- —Automated yield-farming strategy selection based on live APY data
- —Integrating Balancer yield metrics into trading bots
Fit
Best for
- —DeFi developers needing on-demand Balancer yield data
- —Agents that can pay per-call with USDC on Base
- —Low-volume or bursty access patterns with no subscription overhead
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-frequency consumers who need bulk/subscription pricing
- —Non-crypto-native callers without Base USDC wallets
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/balancer/apy \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>" \
-d '{}'Example
Request
{}Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, and all documentation pages are empty stubs. The response format and accepted parameters are entirely unknown.
Warnings
- —No API documentation available — docs, pricing, and README pages all return only a 'Connect wallet' prompt.
- —Request body schema and response format are undocumented; the example request is a guess.
- —No OpenAPI or machine-readable schema was found.
- —Provider hosts many endpoints with identical generic descriptions; unclear depth of each service.
Citations
- —Endpoint returns 402 with x402 version 1 challenge, exact scheme, USDC on Base, maxAmountRequired 20000 (= $0.02)https://lowpaymentfee.com/api/v1/defi/balancer/apy
- —All APIs priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/defi/balancer/apy