Portfolio holdings data via x402 micropayment on Base network, $0.02 per request.
What it does
This endpoint at lowpaymentfee.com returns portfolio holdings data for portfolio ID 92. It is part of a broader platform offering various paid API endpoints across data analytics, AI/ML, finance/Web3, and infrastructure categories, all settled via the x402 protocol on the Base network using USDC.
The endpoint accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers include an X-PAYMENT header with a signed USDC payment on Base. The maximum amount required per call is 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each request is independently paid.
The platform advertises a uniform $0.02/request pricing model across all its endpoints. Documentation pages exist at /docs, /pricing, and /api but currently render only a wallet-connect prompt with no substantive content. No OpenAPI schema, request/response examples, or detailed field documentation were found. The specific structure of the holdings response (fields, pagination, filters) is unknown from available material.
Capabilities
Use cases
- —Retrieve current holdings for a specific portfolio via a single micropayment
- —Integrate portfolio data into dashboards or trading bots without subscription overhead
- —Agent-driven portfolio monitoring with pay-per-call economics
Fit
Best for
- —Developers wanting frictionless, keyless access to portfolio holdings data
- —AI agents that need on-demand financial data with crypto micropayments
- —Low-volume or sporadic consumers who prefer pay-per-request over subscriptions
Not for
- —High-frequency consumers needing bulk or streaming portfolio data at lower marginal cost
- —Users without a Base-network USDC wallet or x402-compatible client
- —Anyone needing detailed API documentation or guaranteed SLA before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/portfolios/92/holdings \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages render only a wallet-connect prompt. The specific purpose of 'portfolio 92 holdings' is unexplained, making this effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — request body format and response structure are unknown
- —All doc/pricing/API pages return only a wallet-connect prompt with no substantive content
- —The endpoint is hardcoded to portfolio ID 92; it is unclear whether other portfolio IDs are accessible or what this portfolio represents
- —No rate limit or SLA information provided
Citations
- —Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/portfolios/92/holdings
- —Platform advertises $0.02/request uniform pricing, no API keys, no rate limitshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/portfolios/92/holdings