x402basequality 0.30

Portfolio performance data via x402 micropayment on Base network, $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/85/performance

What it does

This endpoint at lowpaymentfee.com provides portfolio performance data for a specific portfolio (ID 85) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).

The provider lowpaymentfee.com hosts a broad catalog of x402-gated APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request. This particular endpoint falls under the finance category and appears to return performance metrics for a portfolio. No OpenAPI schema, detailed documentation, or example responses were found in the crawl; the docs, pricing, and API pages all returned only a "Connect wallet" prompt with no substantive content.

Because no request/response schema is documented and the endpoint path is portfolio-specific (hardcoded ID 85), the practical utility for arbitrary callers is unclear. There is no information on what fields the response contains, what time range is covered, or whether the portfolio ID can be changed. Agents should treat this as a low-documentation endpoint and test with a small payment first.

Capabilities

x402-paymentusdc-baseportfolio-performancejson-responsemicropaymentpay-per-request

Use cases

  • —Retrieving performance data for portfolio #85 via a single micropayment
  • —Integrating pay-per-call portfolio analytics into an agent workflow
  • —Demonstrating x402 payment protocol usage on Base network

Fit

Best for

  • —Agents needing on-demand portfolio performance data without API keys
  • —Developers experimenting with x402 micropayment protocol
  • —Low-volume, pay-as-you-go financial data access

Not for

  • —High-volume portfolio analytics requiring bulk or subscription pricing
  • —Users who need detailed API documentation or guaranteed SLAs
  • —Querying arbitrary portfolio IDs (endpoint is hardcoded to portfolio 85)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/85/performance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/85/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 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, no examples, and the docs pages are empty. The hardcoded portfolio ID and lack of any substantive documentation make this effectively a stub listing.

Warnings

  • —No OpenAPI or request/response schema available
  • —Documentation pages (docs, pricing, API, README) return only 'Connect wallet' with no content
  • —Endpoint path is hardcoded to portfolio ID 85; unclear if other IDs are supported
  • —No example responses available to verify what data is actually returned

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:01:02Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/N5zrT7
Portfolio performance data via x402 micropayment on Base network, $0.02/request in USDC. — Clawmart · Clawmart