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/36/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio #36 via a POST request, gated behind an x402 payment challenge. It is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request and settled in USDC on the Base network.

The specific endpoint `/api/v1/portfolios/36/holdings` is categorized under the platform's finance and data offerings, though the exact response schema is not documented in the crawled material. The x402 challenge confirms the endpoint is live, accepts USDC (contract 0x8335…2913 on Base), and charges a maximum of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). Payment is made via the x402 `exact` scheme with a 300-second timeout. No API keys or rate limits are advertised; access is purely payment-gated.

Documentation on the site is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawl. The endpoint's purpose (portfolio holdings) is inferred solely from the URL path and the platform's general finance category.

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 trading or analytics dashboard
  • —Programmatic access to financial holdings without API key management

Fit

Best for

  • —Agents that can settle x402 USDC payments on Base
  • —Developers wanting keyless, pay-per-call access to portfolio data
  • —Automated workflows needing on-demand holdings snapshots

Not for

  • —Users who need detailed API documentation or response schemas before integrating
  • —Bulk or high-frequency data retrieval where per-call pricing adds up quickly
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/36/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/36/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The purpose of the endpoint is inferred only from the URL path. This is effectively a stub listing.

Warnings

  • —No API documentation available — /docs, /api, /pricing, /README all return only a 'Connect wallet' prompt
  • —No request body schema or response schema documented anywhere
  • —The specific data returned by /api/v1/portfolios/36/holdings is unknown — 'portfolio 36' is opaque with no explanation
  • —The platform lists many endpoints but none appear to have public documentation

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:32:24Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

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