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/22/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio #22 via a POST request, gated behind the x402 payment protocol. Each call costs $0.02 in USDC on the Base network — the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The endpoint is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 market data, and utility services — all priced at $0.02 per request and settled in USDC on Base. However, this specific listing covers only the `/api/v1/portfolios/22/holdings` route.

Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned 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 (returns a proper 402 challenge), but the actual data contract is unknown.

Capabilities

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

Use cases

  • —Fetching current holdings for a specific portfolio programmatically
  • —Integrating portfolio position data into dashboards or trading bots
  • —Automated portfolio monitoring with per-call micropayments

Fit

Best for

  • —Developers who want keyless, pay-per-call access to portfolio data
  • —Agents that need on-demand holdings lookups without subscription commitments
  • —Web3-native applications settling API costs in USDC on Base

Not for

  • —Users needing detailed API documentation or guaranteed response schemas before integrating
  • —High-frequency bulk data consumers who would prefer flat-rate pricing
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/22/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/22/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, and all documentation pages returned only a wallet-connect prompt. The purpose of 'portfolio 22 holdings' is opaque — it is unclear whether this returns real financial data or demo/placeholder content.

Warnings

  • —No API documentation available — all doc pages return only a 'Connect wallet' prompt
  • —No request body schema or response schema provided; data contract is entirely unknown
  • —The specific portfolio (ID 22) is hardcoded in the URL with no explanation of what it represents
  • —Cannot verify whether the endpoint returns real, useful financial data or placeholder content

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:23:53Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

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