x402basequality 0.35

Retrieve portfolio holdings 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/14/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio ID 14 via a POST request, gated by the x402 payment protocol. The endpoint is live and responds with a 402 challenge requiring payment in USDC on the Base network. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.

The provider, lowpaymentfee.com, operates a broader platform offering multiple x402-gated API categories including data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities — all priced at $0.02 per request. The platform advertises no API keys, no rate limits, and instant access. However, the specific endpoint for portfolio 14 holdings lacks detailed documentation: there is no OpenAPI schema, no request/response examples, and no description of what fields the holdings response contains. The crawled docs, pricing, and API pages all returned only a "Connect wallet" prompt with no additional content.

Because the endpoint path references a specific portfolio ID (14), it is unclear whether this is a demo/sample portfolio or a user-specific resource. Without documentation on the request body schema or response format, callers will need to experiment to determine what data is returned and what POST body (if any) is expected.

Capabilities

x402-paymentusdc-baseportfolio-holdingsmicropaymentpay-per-request

Use cases

  • —Fetching portfolio holding positions programmatically
  • —Integrating portfolio data into dashboards or trading bots
  • —Agent-driven portfolio analysis with per-call payment

Fit

Best for

  • —Developers wanting keyless, pay-per-call access to portfolio data
  • —AI agents that can settle x402 payments on Base
  • —Quick one-off portfolio lookups without subscription commitments

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —High-frequency bulk data retrieval where per-call costs add up
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/14/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/14/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI schema, no request/response examples, and no meaningful documentation beyond the landing page listing. The specific endpoint's purpose (portfolio 14 holdings) is only inferable from the URL path.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —No request body or response body examples found anywhere in crawled content
  • —Docs, pricing, API, and README pages all returned only 'Connect wallet' with no useful content
  • —It is unclear what portfolio ID 14 represents or whether arbitrary portfolio IDs are supported
  • —The endpoint description 'Premium API Access' is generic and does not describe the actual data returned

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:21:22Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/2TMxXT
Retrieve portfolio holdings via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart