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/14/performance

What it does

This endpoint at lowpaymentfee.com returns portfolio performance data for portfolio ID 14. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all settled via the x402 protocol on the Base network using USDC.

The endpoint is live and responds with a 402 Payment Required challenge, accepting x402 exact-scheme payments. The maximum amount required is 20,000 base units of USDC (0x8335…on Base), which equals $0.02 USD (USDC uses 6 decimals). The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds. The endpoint accepts POST requests and returns application/json.

Documentation is extremely sparse — the docs, pricing, API, and README pages all render 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 portfolio performance response contains. The endpoint path suggests it returns performance metrics for a specific portfolio (ID 14), but the exact data shape is unknown. The platform advertises no API keys, no rate limits, and instant access as features.

Capabilities

x402-paymentusdc-settlementbase-networkportfolio-performancepay-per-requestjson-response

Use cases

  • —Retrieving performance data for a specific investment portfolio
  • —Integrating portfolio analytics into agent workflows without API key management
  • —On-demand financial data access with per-request USDC micropayments

Fit

Best for

  • —Agents needing portfolio performance data with zero signup friction
  • —Developers wanting pay-per-use financial APIs settled on Base
  • —Automated workflows requiring keyless API access

Not for

  • —Users needing detailed API documentation or response schema before integrating
  • —Bulk data retrieval where per-request pricing becomes expensive
  • —Accessing portfolios other than ID 14 (only this specific portfolio endpoint is documented here)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/14/performance \
  -H "X-PAYMENT: <x402-payment-header>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/14/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet connect prompt. The purpose of the endpoint (portfolio 14 performance) is only inferable from the URL path.

Warnings

  • —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
  • —No OpenAPI or JSON schema describing request parameters or response format
  • —Endpoint is specific to portfolio ID 14; unclear if other portfolio IDs are accessible
  • —Response data structure is completely unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:23:30Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/gs5Dyw
Portfolio performance data via x402 micropayment on Base network, $0.02/request in USDC. — Clawmart · Clawmart