x402basequality 0.35

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/95/performance

What it does

This endpoint at lowpaymentfee.com provides portfolio performance data for a specific portfolio (ID 95) 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 call. This particular endpoint falls under the finance category and appears to return performance metrics for a pre-defined portfolio. No API keys or rate limits are advertised; access is granted purely through the x402 payment protocol.

Documentation is extremely sparse. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no description of request parameters, and no example responses. The endpoint is confirmed live (402 challenge captured), but the actual data returned after payment is unknown. Users should expect to experiment or contact the provider for details on the response format.

Capabilities

x402-paymentusdc-base-networkportfolio-performancejson-apimicropaymentno-api-key

Use cases

  • —Retrieving performance metrics for portfolio #95 via a single micropayment
  • —Integrating portfolio performance data into automated trading or analytics pipelines
  • —Agent-driven portfolio monitoring without API key management

Fit

Best for

  • —Developers wanting keyless, pay-per-call portfolio data access
  • —AI agents that can settle x402 payments on Base
  • —Quick one-off portfolio performance lookups without subscription commitments

Not for

  • —Users needing detailed documentation or guaranteed SLA before integrating
  • —Bulk historical portfolio backtesting requiring thousands of calls at lower cost
  • —Accessing arbitrary portfolio IDs (this endpoint is hardcoded to portfolio 95)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/95/performance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/95/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request/response formats, no examples, and the docs pages are empty. The purpose of 'portfolio 95 performance' is opaque without further context.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all return only a wallet-connect prompt with no content.
  • —No request or response schema provided; the data returned after payment is unknown.
  • —Endpoint is scoped to a single hardcoded portfolio ID (95); unclear if other portfolio IDs are available.
  • —Provider hosts many advertised endpoints but none have documented schemas.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:08:10Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

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