x402basequality 0.35

Retrieve portfolio holdings 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/1/holdings

What it does

This endpoint at lowpaymentfee.com returns portfolio holdings data for a specified portfolio (portfolio ID 1 in this case). It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure utility APIs — all gated behind x402 micropayments settled in USDC on the Base network.

The endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an X-PAYMENT header with a valid payment proof. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. There are no API keys, no rate limits, and no subscription commitments — each request is paid individually.

The platform advertises a uniform $0.02/request pricing across all its endpoints. Documentation beyond the landing page is extremely thin; the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (returns a proper 402 challenge), but the actual shape of the holdings response and the expected POST body are unknown.

Capabilities

portfolio-holdingsx402-micropaymentusdc-paymentbase-networkjson-apiper-request-billing

Use cases

  • —Fetching current holdings for a portfolio in an automated trading or analytics pipeline
  • —Agent-driven portfolio monitoring with per-request micropayments
  • —Integrating portfolio data into dashboards without API key management

Fit

Best for

  • —Agents or bots that need on-demand portfolio holdings data without subscription overhead
  • —Developers wanting frictionless pay-per-call access to financial data on Base
  • —Low-volume or sporadic consumers who prefer micropayments over monthly plans

Not for

  • —High-frequency consumers who need bulk or streaming portfolio data at lower marginal cost
  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/1/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/1/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 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 spec, no request/response schema, no documentation beyond a landing page, and no example payloads. The actual data returned is entirely unknown, making this effectively a stub listing.

Warnings

  • —No API documentation available — /docs, /pricing, /api, and /README all render only a wallet-connect prompt
  • —No OpenAPI or JSON schema for request or response bodies
  • —The actual content and structure of the holdings response is unknown
  • —Portfolio ID '1' is hardcoded in the endpoint path; unclear if other portfolio IDs are accessible or how they are obtained

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:16:51Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/wE9Pje
Retrieve portfolio holdings via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart