x402basequality 0.35

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/44/performance

What it does

This endpoint at lowpaymentfee.com returns portfolio performance data for a specific portfolio (ID 44) as JSON. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure APIs, all gated behind x402 micropayments on the Base network using USDC.

The endpoint accepts POST requests and is priced at a maximum of 20,000 base units of USDC (6 decimals), which equals $0.02 per call. Payment is made via the x402 protocol's X-PAYMENT header, settling on-chain to a specified address on Base. The platform advertises no API keys, no rate limits, and instant access — you pay per request with no minimums or commitments.

Documentation is extremely sparse. The crawled /docs, /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what fields the portfolio performance response contains. The endpoint is confirmed live (402 challenge captured), but the actual data returned after payment is unknown from available sources.

Capabilities

x402-micropaymentportfolio-performanceusdc-paymentbase-networkpay-per-requestjson-response

Use cases

  • —Retrieving performance metrics for a specific investment portfolio
  • —Integrating portfolio performance data into dashboards or agent workflows
  • —Programmatic access to financial portfolio data without API key registration

Fit

Best for

  • —Agents or apps needing on-demand portfolio performance data with no signup
  • —Developers who prefer pay-per-call crypto micropayments over subscription billing
  • —Quick integration where no API key management is desired

Not for

  • —Users who need detailed documentation or schema guarantees before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone without a Base-network USDC wallet or x402-compatible client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/44/performance \
  -H "X-PAYMENT: <x402_payment_token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/44/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages returned only a wallet-connect prompt. The purpose of the endpoint (portfolio 44 performance) is only inferable from the URL path; no field-level detail is available.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README pages all returned only 'Connect wallet' with no content.
  • —No OpenAPI or output schema describing the response fields.
  • —The specific portfolio (ID 44) is hardcoded in the URL; it is unclear whether other portfolio IDs are available or what data this portfolio represents.
  • —Request body schema for the POST method is unknown.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:35:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/Jd42wW
Portfolio performance data via x402 micropayment on Base network, $0.02 per request. — Clawmart · Clawmart