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/24/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio ID 24. 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, and infrastructure utilities — all gated behind the x402 payment protocol on the Base network.

The specific endpoint `/api/v1/portfolios/24/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 POST body (if any) is expected. The endpoint is confirmed live (402 challenge captured), but the lack of documentation means callers must experiment or contact the provider to understand the data format.

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 autonomously purchasing financial data without API key provisioning

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 on-chain micropayments over subscription billing

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integrating
  • —Bulk data consumers who need thousands of calls at volume-discounted rates
  • —Anyone without a Base-compatible wallet or x402 client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/24/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/24/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, no documentation beyond a landing page listing, and the specific endpoint (/portfolios/24/holdings) is not even listed on the homepage. The purpose and data format are entirely inferred from the URL path.

Warnings

  • —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.
  • —No OpenAPI or JSON schema describing request body or response format.
  • —This specific endpoint (/api/v1/portfolios/24/holdings) is not listed among the advertised APIs on the homepage, raising questions about whether it is a production endpoint or a test/demo resource.
  • —The hardcoded portfolio ID (24) suggests this may be a single-portfolio lookup rather than a general-purpose holdings API.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:19:12Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/5BkjZJ
Retrieve portfolio holdings data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart