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/78/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio ID 78. 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 data, and utility services — all gated behind the x402 payment protocol on the Base network.

The specific endpoint `/api/v1/portfolios/78/holdings` accepts POST requests and is priced at a maximum of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals), which equals $0.02 per call. Payment is settled on-chain via the x402 "exact" scheme, meaning the caller includes an X-PAYMENT header with a signed payment proof. No API keys, rate limits, or upfront commitments are required — access is instant once payment is verified.

Documentation on the site is extremely sparse: the docs, pricing, API, 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 or what parameters the POST body accepts. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know the exact request format or response shape without experimentation.

Capabilities

x402-paymentportfolio-holdingsusdc-basepay-per-requestno-api-key

Use cases

  • —Fetching current holdings for a specific portfolio programmatically
  • —Integrating portfolio data into dashboards or trading bots
  • —Agents that need on-demand portfolio composition data without managing API keys

Fit

Best for

  • —Developers wanting keyless, pay-per-call access to portfolio data
  • —AI agents that can settle x402 payments on Base
  • —Users who prefer micropayments over subscription billing

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —Bulk data retrieval where per-request pricing would be cost-prohibitive
  • —Anyone without a Base-compatible wallet or USDC balance

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/78/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/78/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge, but there is zero documentation on request parameters, response schema, or what 'portfolio 78 holdings' actually contains. No OpenAPI spec, no examples, and all doc pages render only 'Connect wallet'. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
  • —No OpenAPI or request/response schema provided; request body format is unknown
  • —The specific portfolio (ID 78) is hardcoded in the URL with no explanation of what it represents
  • —Response format and fields are entirely unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:00:36Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/FFLJ5a
Retrieve portfolio holdings data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart