x402basequality 0.30

Retrieve portfolio holdings data via x402 micropayment on Base for $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/61/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio ID 61. It is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 market data, and infrastructure utilities — all priced at $0.02 per request and settled via x402 using USDC on the Base network.

The specific endpoint `/api/v1/portfolios/61/holdings` accepts POST requests and returns JSON. The x402 challenge confirms it is live, requiring a maximum payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals), which equals $0.02. Payment is made via the x402 exact scheme to the payTo address. No API keys, rate limits, or upfront commitments are required — access is instant upon payment.

Documentation on the site is extremely thin: the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the holdings response contains. The endpoint path suggests it returns financial portfolio holdings, but the exact schema and semantics are unknown.

Capabilities

x402-paymentusdc-baseportfolio-holdingspay-per-requestno-api-key

Use cases

  • —Fetching holdings data for a specific portfolio via automated agent
  • —Integrating portfolio position data into a financial dashboard without API key management
  • —Paying per-call for portfolio data using USDC on Base

Fit

Best for

  • —Agents or bots that need on-demand portfolio holdings without subscription overhead
  • —Developers experimenting with x402 payment-gated APIs
  • —Low-volume consumers who want pay-as-you-go financial data

Not for

  • —Users needing detailed API documentation or response schema guarantees before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone requiring holdings for arbitrary portfolio IDs (this endpoint is hardcoded to portfolio 61)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/61/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/61/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what data the holdings endpoint actually returns. The site's docs pages are empty beyond a wallet connect prompt. This is effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or request/response schema provided; the structure of the holdings response is unknown
  • —Endpoint is specific to portfolio ID 61; it is unclear whether other portfolio IDs are accessible or what portfolio 61 represents
  • —The broader lowpaymentfee.com platform lists many endpoints but none have documented schemas

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:53:36Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/qQ6Sbv
Retrieve portfolio holdings data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart