x402basequality 0.35

Portfolio holdings 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/2/holdings

What it does

This endpoint at lowpaymentfee.com returns portfolio holdings data for a specific portfolio (portfolio ID 2) behind an x402 paywall. The endpoint 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 (maxAmountRequired of 20,000 base units with 6 decimals).

The provider lowpaymentfee.com hosts a broad catalog of x402-gated APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per call. This particular endpoint falls under the finance category and serves portfolio holdings information. No API keys or rate limits are advertised; access is instant upon payment via the x402 protocol.

Documentation is extremely sparse. The docs, pricing, API, and README pages all render 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 holdings response contains or what parameters the POST body accepts. The endpoint is confirmed live (returns a valid 402 challenge), but the actual data contract is unknown.

Capabilities

x402-paymentportfolio-holdingsusdc-base-networkmicropaymentjson-apipost-method

Use cases

  • —Retrieving current holdings for a tracked portfolio
  • —Programmatic portfolio monitoring by AI agents
  • —Integrating portfolio data into dashboards or trading bots

Fit

Best for

  • —Agents needing on-demand portfolio holdings without API key management
  • —Micropayment-based access to financial data on Base network
  • —Developers experimenting with x402 protocol payments

Not for

  • —Users needing detailed API documentation or schema guarantees before integrating
  • —High-frequency polling where per-request costs accumulate quickly
  • —Anyone requiring holdings for arbitrary portfolio IDs (this endpoint is fixed to portfolio 2)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/2/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/2/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 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 2' represents. No OpenAPI spec, no examples, and all doc pages are empty wallet-connect stubs.

Warnings

  • —No API documentation available — docs/pricing/README pages only show 'Connect wallet'
  • —No request body schema or response schema documented
  • —Endpoint is hardcoded to portfolio ID 2; unclear if other portfolio IDs are available
  • —Unknown what data source backs the holdings information
  • —No OpenAPI or machine-readable schema provided

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:24:17Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/j8G5Xz
Portfolio holdings data via x402 micropayment on Base network for $0.02/request — Clawmart · Clawmart