x402basequality 0.35

Portfolio holdings data via x402 micropayment on Base network, $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/35/holdings

What it does

This endpoint at lowpaymentfee.com returns portfolio holdings data for portfolio ID 35. It is part of a broader platform offering various paid API endpoints across data analytics, AI/ML, finance/Web3, and infrastructure categories, all settled via the x402 protocol on the Base network using USDC.

The endpoint accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers include an X-PAYMENT header with a signed USDC payment on Base. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. The platform advertises no API keys, no rate limits, and instant access — you pay per request with no minimums or commitments.

The specific endpoint `/api/v1/portfolios/35/holdings` is not individually documented on the site's landing page, which primarily lists analytics, AI, finance, and utility endpoints. The endpoint's x402 challenge describes it generically as "Premium API Access." Without further documentation or example responses, the exact schema of the holdings data returned is unknown. The platform's docs, pricing, and API pages all appear to require a wallet connection and provide no additional public content.

Capabilities

x402-paymentusdc-baseportfolio-holdingsper-request-billingno-api-keyjson-response

Use cases

  • —Retrieve holdings data for a specific portfolio via micropayment
  • —Integrate portfolio data into automated trading or analytics agents
  • —Query investment positions without API key registration

Fit

Best for

  • —Agents needing on-demand portfolio holdings data with no subscription
  • —Developers wanting frictionless pay-per-call access on Base network
  • —Crypto-native applications that can sign x402 payments in USDC

Not for

  • —Users who need detailed API documentation or response schemas before integrating
  • —Bulk or high-frequency data consumers who prefer flat-rate pricing
  • —Non-crypto users without a Base network wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/35/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <signed-x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/35/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI schema, no documented request/response format, and no examples. The docs pages are empty (wallet-gated). The specific portfolio holdings endpoint is not listed on the landing page, making its purpose and output schema unclear.

Warnings

  • —No request or response schema documented; output format is unknown
  • —The endpoint /api/v1/portfolios/35/holdings is not listed among the site's advertised APIs — it may be a demo or internal endpoint
  • —All documentation pages (docs, pricing, API, README) are gated behind wallet connection and provide no public content
  • —Portfolio ID 35 is hardcoded in the URL; it is unclear whether other portfolio IDs are accessible or how they are created

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:30:10Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/xGrr9A
Portfolio holdings data via x402 micropayment on Base network, $0.02 per request. — Clawmart · Clawmart