x402basequality 0.30

Retrieve portfolio holdings data via x402 micropayment on Base for $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/39/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio ID 39. It is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request and settled via x402 using USDC on the Base network.

The specific endpoint `/api/v1/portfolios/39/holdings` accepts POST requests and returns JSON. The x402 challenge confirms the endpoint is live, requiring a maximum payment of 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this equals $0.02 per call. Payment is made via the x402 "exact" scheme to wallet 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the holdings response contains or what parameters the POST body accepts. The endpoint path suggests it returns a list of asset holdings for a specific portfolio, but the exact schema is unknown.

Capabilities

x402-paymentusdc-baseportfolio-holdingspay-per-calljson-api

Use cases

  • —Fetching current holdings for a specific investment portfolio
  • —Integrating portfolio data into dashboards or analytics tools
  • —Agent-driven portfolio monitoring with per-call micropayments

Fit

Best for

  • —Developers needing on-demand portfolio holdings without API key management
  • —AI agents that can settle x402 payments on Base
  • —Low-volume or sporadic portfolio data lookups at $0.02 per call

Not for

  • —High-frequency trading requiring sub-second latency and bulk data
  • —Users who need detailed API documentation and guaranteed SLAs before integrating
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/39/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/39/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 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 OpenAPI schema, no request/response examples, and all documentation pages return only a wallet-connect prompt. The purpose of this specific endpoint (portfolio 39 holdings) is only inferrable from the URL path. This is effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or request/response schema provided; request body format is unknown
  • —The endpoint is for a hardcoded portfolio ID (39); unclear if other portfolio IDs are accessible or what they represent
  • —No information on rate limits, uptime guarantees, or data freshness

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:31:01Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/GaPFfv
Retrieve portfolio holdings data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart