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/71/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio ID 71. 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 priced at $0.02 per request and settled via x402 micropayments in USDC on the Base network.

The specific endpoint `/api/v1/portfolios/71/holdings` accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers attach an `X-PAYMENT` header containing a signed USDC payment of up to 20,000 base units ($0.02, since USDC uses 6 decimals) to the payee address on Base. No API keys, accounts, or rate limits are advertised — access is purely payment-gated.

Documentation beyond the landing page is extremely thin. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data returned after payment and the expected POST body structure are unknown.

Capabilities

x402-paymentusdc-baseportfolio-holdingspay-per-requestno-api-keyjson-response

Use cases

  • —Fetching current holdings for a specific investment portfolio
  • —Integrating portfolio data into automated trading or analytics pipelines
  • —Agent-driven portfolio monitoring with per-call micropayments

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 no-subscription, usage-based pricing

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 USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/71/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-signed-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/71/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 documentation, no request/response schema, no examples, and no explanation of what 'portfolio 71 holdings' actually contains. The listing is effectively a stub with only pricing and protocol details available.

Warnings

  • —No OpenAPI spec or request/response schema available
  • —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content
  • —The meaning of 'portfolio 71' and the structure of the holdings response are completely unknown
  • —No information on what POST body (if any) is expected

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:50:31Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/h8SQWp
Retrieve portfolio holdings data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart