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/80/performance

What it does

This endpoint at lowpaymentfee.com provides portfolio performance data for a specific portfolio (ID 80) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required — access is granted per-call via the x402 payment protocol.

The provider site (lowpaymentfee.com) hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all priced at $0.02 per request. However, this specific endpoint (/api/v1/portfolios/80/performance) is not listed on the provider's landing page among the advertised API categories. Its exact response schema and the nature of the portfolio it tracks are undocumented. The endpoint is confirmed live via a valid 402 challenge, but no sample response or detailed documentation was found.

Because the crawled docs pages (docs, api, pricing, README) all returned only a "Connect wallet" stub with no substantive content, the actual data returned by this endpoint remains unknown. Users should expect a JSON response related to portfolio performance metrics, but the specific fields and data source cannot be confirmed from available materials.

Capabilities

x402-paymentusdc-baseportfolio-performancejson-apipay-per-callno-api-key

Use cases

  • —Retrieving performance metrics for a tracked portfolio
  • —Integrating portfolio performance data into dashboards or agents
  • —On-demand financial data access without subscription or API key

Fit

Best for

  • —Agents or apps needing one-off portfolio performance lookups
  • —Developers wanting keyless, pay-per-call financial data
  • —x402-compatible clients on the Base network

Not for

  • —Users needing documented response schemas before integration
  • —High-frequency bulk data retrieval (no documented rate limits but per-call cost adds up)
  • —Anyone without USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/80/performance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/80/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no response schema, no examples, and the endpoint is not even listed among the provider's advertised APIs. Docs pages are all stubs.

Warnings

  • —This specific endpoint (/api/v1/portfolios/80/performance) is not listed among the provider's advertised APIs — its purpose and data source are unclear.
  • —All documentation pages (docs, api, pricing, README) returned only 'Connect wallet' stubs with no content.
  • —No response schema or example response is available; the structure of returned data is unknown.
  • —The portfolio ID (80) is hardcoded in the path — it is unclear whether other portfolio IDs are available or what portfolio 80 represents.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:01:29Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/rAh6zW
Portfolio performance data via x402 micropayment on Base network, $0.02/request. — Clawmart · Clawmart