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/32/performance

What it does

This endpoint at lowpaymentfee.com returns portfolio performance data for portfolio ID 32. It is part of a broader platform offering various pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories. The endpoint uses the x402 payment protocol, settling in USDC on the Base network at $0.02 per request (maxAmountRequired of 20,000 base units with USDC's 6 decimals = $0.02). No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The specific endpoint `/api/v1/portfolios/32/performance` accepts POST requests and returns JSON. Based on the path structure, it likely returns performance metrics (e.g., returns, value over time) for a specific portfolio identified by ID 32. However, no detailed documentation of the request body schema or response fields is available — the docs, pricing, and API pages all resolve to a minimal "Connect wallet" prompt with no further technical detail.

The platform advertises a flat $0.02 per request across all endpoints, with no minimums, no commitments, and instant access. Payment is made via USDC (contract 0x8335...2913) on Base to address 0x1A2B...85F3, with a 300-second payment timeout. The x402 challenge was successfully captured, confirming the endpoint is live.

Capabilities

x402-paymentportfolio-performanceusdc-basepay-per-requestjson-apino-api-key

Use cases

  • —Retrieve performance data for a specific investment portfolio on demand
  • —Integrate portfolio performance metrics into dashboards or agent workflows
  • —Pay-per-call access to portfolio analytics without subscription commitments

Fit

Best for

  • —Agents or apps needing on-demand portfolio performance data without API key management
  • —Developers prototyping finance dashboards who want instant, low-cost access
  • —x402-compatible clients on the Base network looking for cheap data endpoints

Not for

  • —Users needing detailed documentation or well-defined request/response schemas before integration
  • —Bulk historical portfolio analysis requiring thousands of calls (costs add up at $0.02 each)
  • —Non-crypto-native clients who cannot produce x402 payment headers

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/32/performance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/32/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation of request body parameters, response schema, or what 'portfolio 32' actually represents. The docs/pricing/API pages all render only a 'Connect wallet' prompt with no technical content. This is effectively a stub listing with confirmed liveness but minimal usable detail.

Warnings

  • —No request body schema or response schema documented anywhere
  • —All documentation pages (docs, api, pricing, README) return only a 'Connect wallet' prompt with no technical content
  • —It is unclear what portfolio ID 32 refers to or whether other portfolio IDs are accessible
  • —No OpenAPI spec, ai-plugin manifest, or agents.txt available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:33:26Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

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