x402basequality 0.35

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/65/performance

What it does

This endpoint at lowpaymentfee.com returns portfolio performance data for portfolio ID 65. 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 returns a 402 challenge requesting payment of up to 20,000 base units of USDC (0.02 USD) per request. Payment is made via the x402 "exact" scheme to a specified wallet address. The response MIME type is application/json. The endpoint accepts POST requests and requires no API keys or account registration — access is granted purely through on-chain micropayment.

The specific endpoint `/api/v1/portfolios/65/performance` is not listed on the site's main landing page among the advertised API categories, which focus on analytics, AI, finance, and utility endpoints. This suggests it may be a less-documented or specialized route. No OpenAPI schema, detailed documentation, or example responses were found in the crawl. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content.

Capabilities

portfolio-performancex402-paymentusdc-micropaymentbase-networkpay-per-requestjson-response

Use cases

  • —Retrieving performance metrics for a specific investment portfolio
  • —Integrating portfolio performance data into automated trading or reporting agents
  • —Paying per-request for financial data without API key management

Fit

Best for

  • —Agents needing on-demand portfolio performance data with no subscription
  • —Developers building x402-native financial dashboards
  • —Automated systems that pay per API call via USDC on Base

Not for

  • —Users needing bulk historical portfolio data exports at scale
  • —Anyone without a Base-network USDC wallet
  • —Use cases requiring detailed API documentation or guaranteed SLAs

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/65/performance \
  -H "X-PAYMENT: <x402-payment-header>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/65/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but there is no OpenAPI schema, no example responses, and no documentation beyond a wallet-connect prompt. The specific portfolio endpoint is not listed among the site's advertised APIs, making its purpose and response format unclear. Pricing is inferrable from the challenge but everything else must be guessed.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —This specific endpoint (/api/v1/portfolios/65/performance) is not listed among the site's advertised APIs — it may be undocumented or experimental
  • —All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no usable content
  • —Response format and fields are unknown — no example responses found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:50:03Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/LPk65q
Portfolio performance data via x402 micropayment on Base network, $0.02/request. — Clawmart · Clawmart