x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/33/performance

What it does

This endpoint at lowpaymentfee.com provides portfolio performance data for a specific portfolio (ID 33) via the x402 payment protocol. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure APIs, all priced at $0.02 per request and settled in USDC on the Base network.

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 of up to $0.02 (20,000 base units of USDC with 6 decimals) on Base. There are no API keys, no rate limits, and no upfront commitments — each call is independently paid for at the time of the request. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a maximum timeout of 300 seconds.

Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. The specific request body schema and response format for the portfolio performance endpoint are not documented anywhere in the crawled material. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation or example responses, the exact fields and data returned remain unknown.

Capabilities

portfolio-performancex402-paymentusdc-micropaymentbase-networkjson-apipay-per-request

Use cases

  • —Retrieving performance metrics for a specific investment portfolio
  • —Integrating portfolio performance data into dashboards or reporting tools
  • —Agent-driven portfolio monitoring with per-request micropayments

Fit

Best for

  • —Developers needing on-demand portfolio performance data without API key management
  • —AI agents that can autonomously pay for financial data per request
  • —Applications requiring low-friction, pay-as-you-go access to portfolio analytics

Not for

  • —Users who need detailed API documentation or response schema before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/33/performance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-signed-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/33/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it exists and accepts USDC on Base. However, there is no documentation, no request/response schema, no examples, and no explanation of what 'portfolio 33 performance' actually contains. The site's docs/pricing/API pages are all blank beyond a wallet connect prompt. This is effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, API, and README pages all render only 'Connect wallet'
  • —Request body schema for the POST endpoint is completely unknown
  • —Response format and fields are undocumented
  • —The specific portfolio (ID 33) is hardcoded in the URL with no explanation of what it represents
  • —Cannot verify what data is actually returned without making a paid request

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:32:58Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

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