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/86/performance

What it does

This endpoint at lowpaymentfee.com provides portfolio performance data for a specific portfolio (ID 86) behind an x402 paywall. It 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).

The provider site lowpaymentfee.com hosts a broad collection of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced uniformly at $0.02 per call. This particular endpoint falls under the finance category. No API keys are required; access is granted instantly upon payment via the x402 protocol. The site advertises no rate limits and no minimum commitments.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint is live (returns a valid 402 challenge), but without documentation it is unclear what request body the POST expects or what shape the performance response takes. Use with caution until more documentation surfaces.

Capabilities

x402-paymentportfolio-performanceusdc-base-networkmicropaymentjson-apino-api-key

Use cases

  • —Retrieving performance metrics for a specific investment portfolio
  • —Integrating portfolio performance data into dashboards or analytics tools
  • —Agent-driven portfolio monitoring with per-request micropayments

Fit

Best for

  • —Developers needing on-demand portfolio performance data without subscription commitments
  • —AI agents that can settle x402 payments on Base network
  • —Low-volume or sporadic portfolio data lookups at $0.02 per call

Not for

  • —High-frequency bulk data retrieval where per-request costs add up
  • —Users who need detailed API documentation or request/response schemas before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/86/performance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/86/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The specific purpose of 'portfolio 86 performance' is opaque without further context.

Warnings

  • —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or JSON schema for request or response bodies
  • —The endpoint path references a hardcoded portfolio ID (86); unclear if other portfolio IDs are available or how to discover them
  • —No examples of request payloads or response shapes exist in crawled material

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:08:36Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

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