x402basequality 0.30

Portfolio holdings data via x402 micropayment on Base network for $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/60/holdings

What it does

This endpoint at lowpaymentfee.com returns portfolio holdings data for portfolio ID 60. It is part of a broader platform (lowpaymentfee.com) that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all gated behind the x402 payment protocol on the Base network using USDC.

The specific endpoint `/api/v1/portfolios/60/holdings` accepts POST requests and is priced at a maximum of $0.02 per call (20,000 base units of USDC, which has 6 decimals). Payment is settled on-chain via the x402 "exact" scheme to a designated wallet address. No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

Documentation on the site is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what fields the holdings response contains. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data returned after payment is unknown from available materials.

Capabilities

x402-paymentportfolio-holdingsusdc-base-networkpay-per-requestno-api-key

Use cases

  • —Retrieving holdings data for a specific portfolio via micropayment
  • —Integrating portfolio data into automated trading or analytics agents
  • —Querying investment positions without needing API key registration

Fit

Best for

  • —Agents needing on-demand portfolio holdings data without signup
  • —Developers experimenting with x402 pay-per-call APIs
  • —Low-volume, ad-hoc portfolio data lookups

Not for

  • —High-frequency bulk portfolio data retrieval (no documented batch support)
  • —Users who need detailed API documentation or response schema guarantees before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/60/holdings \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/60/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 no OpenAPI schema, no request/response examples, and no meaningful documentation beyond a landing page listing. The specific endpoint (/portfolios/60/holdings) is not even listed on the homepage — only generic API categories are shown. The actual data returned is entirely unknown.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —All doc/pricing/API pages render only 'Connect wallet' with no content
  • —The specific /portfolios/60/holdings endpoint is not listed on the provider's homepage — it may be a demo or placeholder
  • —Response format and fields are completely unknown; no examples available
  • —Portfolio ID 60 is hardcoded in the URL — unclear if other portfolio IDs are accessible

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:46:47Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/y5N5Xt
Portfolio holdings data via x402 micropayment on Base network for $0.02/request. — Clawmart · Clawmart