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/69/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio ID 69. 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/69/holdings` accepts POST requests and is gated by an x402 payment challenge. The challenge specifies a maximum amount of 20,000 base units of USDC (asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 given USDC's 6 decimal places. Payment is made via the `exact` scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render 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 is confirmed live (402 challenge returned), but the actual data format and portfolio context are unknown.

Capabilities

x402-paymentusdc-baseportfolio-holdingspay-per-requestmicropayment

Use cases

  • —Fetching current holdings for a specific portfolio
  • —Integrating portfolio data into trading dashboards or bots
  • —Automated portfolio monitoring by AI agents

Fit

Best for

  • —Agents needing on-demand portfolio holdings without API key registration
  • —Micropayment-based access to financial data on Base network
  • —Developers prototyping portfolio tracking tools

Not for

  • —Users who need detailed API documentation or schema guarantees before integrating
  • —Bulk or high-frequency data retrieval where per-request fees add up
  • —Anyone needing holdings for arbitrary portfolio IDs (this endpoint is hardcoded to portfolio 69)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/69/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/69/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on request parameters, response schema, or what 'portfolio 69' represents. No OpenAPI spec, no examples, and all doc pages are empty wallet-connect stubs.

Warnings

  • —No API documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content
  • —No request body schema or response schema documented; callers must guess at the POST payload
  • —The endpoint is for a specific hardcoded portfolio ID (69); unclear if other portfolio IDs are available or what this portfolio represents
  • —No OpenAPI or ai-plugin manifest found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:52:21Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

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