x402basequality 0.40

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/63/performance

What it does

This endpoint provides portfolio performance data for a specific portfolio (ID 63) hosted on lowpaymentfee.com. It uses the x402 payment protocol, accepting USDC payments on the Base network. Each request costs $0.02 (20,000 base units of USDC with 6 decimals).

The provider lowpaymentfee.com offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities—all priced at $0.02 per call with no API keys, no rate limits, and no commitments required. This particular endpoint falls under the Finance & Web3 category and returns JSON data about portfolio performance.

The endpoint is live and responds with a proper x402 challenge (HTTP 402) when called without payment. It accepts POST requests and settles payments via USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. No OpenAPI schema or detailed documentation was found beyond the landing page listing, so the exact request body format and response structure are unknown.

Capabilities

x402-paymentusdc-base-networkportfolio-performancepay-per-requestno-api-keyjson-response

Use cases

  • —Retrieving performance metrics for a tracked investment portfolio
  • —Integrating portfolio performance data into dashboards or agents
  • —Programmatic access to portfolio returns without subscription commitments

Fit

Best for

  • —Agents needing on-demand portfolio performance data without API key management
  • —Developers wanting pay-per-use financial data on Base network
  • —Low-volume consumers who prefer micropayments over subscriptions

Not for

  • —Users needing high-frequency bulk data pulls (no documented batch endpoint)
  • —Anyone without USDC on Base network for payment
  • —Users requiring detailed API documentation or schema guarantees before integration

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/63/performance \
  -H "X-PAYMENT: <x402_payment_token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/63/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.40/ 1.00

The endpoint is live with a valid x402 challenge and clear pricing, but there is no OpenAPI schema, no documentation of request/response formats, and the crawled docs/pricing/README pages are empty beyond a wallet-connect prompt. The specific purpose of 'portfolio 63 performance' is undocumented.

Warnings

  • —No OpenAPI or request/response schema available
  • —No documentation beyond the landing page listing
  • —The specific portfolio (ID 63) purpose and data contents are undocumented
  • —Docs, pricing, and README pages all render only a 'Connect wallet' prompt with no useful content

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:53:53Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/9WpFFM
Portfolio performance data via x402 micropayment on Base network for $0.02/request. — Clawmart · Clawmart