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/5/performance

What it does

This endpoint at lowpaymentfee.com provides portfolio performance data through the x402 payment protocol. The specific resource `/api/v1/portfolios/5/performance` returns JSON data related to portfolio #5's performance metrics. Payment is settled in USDC on the Base network at $0.02 per request (20,000 base units with 6 decimals).

The endpoint is part of a broader platform (lowpaymentfee.com) that offers numerous x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced uniformly at $0.02 per call. The platform advertises no API keys, no rate limits, and instant access; callers simply attach an x402 payment header to each request.

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 (returns a proper 402 challenge), but the actual data contract is unknown. The POST method is specified in the outputSchema. Callers should expect a JSON response but will need to experiment to determine the exact shape of the returned data.

Capabilities

x402-paymentportfolio-performanceusdc-base-networkmicropaymentjson-apipost-method

Use cases

  • —Retrieving performance metrics for a specific investment portfolio
  • —Automated portfolio monitoring by AI agents paying per-request
  • —Integrating portfolio performance data into dashboards or reports

Fit

Best for

  • —Agents needing on-demand portfolio performance data without API key management
  • —Micropayment-based access to financial data on Base network
  • —Developers experimenting with x402 payment protocol for finance APIs

Not for

  • —Users needing detailed API documentation or guaranteed response schemas before integrating
  • —High-frequency trading or latency-sensitive applications (no SLA or rate-limit info available)
  • —Access to arbitrary portfolio IDs (only portfolio 5 is confirmed at this path)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/5/performance \
  -H "X-PAYMENT: <x402_payment_header>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/5/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs. The actual data returned is completely unknown, making this effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, and README pages all return only a wallet-connect prompt with no content
  • —No request or response schema provided; the shape of the portfolio performance data is unknown
  • —Only portfolio ID 5 is referenced in this endpoint path; it is unclear whether other portfolio IDs are supported
  • —No rate limit, SLA, or uptime guarantees documented

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:36:36Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/4GR3RY
Portfolio performance data via x402 micropayment on Base network for $0.02/request. — Clawmart · Clawmart