x402basequality 0.30

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/32/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio #32 via a POST request, gated by the x402 payment protocol. Each call costs $0.02 in USDC on the Base network — the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The provider's landing page lists a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/crypto market data, and utility services, all priced at $0.02 per request. This specific endpoint falls under the finance/Web3 category and appears to serve portfolio holdings information, though the exact response schema is not documented. The endpoint accepts POST requests and returns application/json.

Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawl. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what request body is expected or what the response payload looks like.

Capabilities

x402-paymentportfolio-holdingsusdc-basepay-per-callno-api-keyjson-response

Use cases

  • —Fetching current holdings for a specific portfolio programmatically
  • —Integrating portfolio data into dashboards or trading bots
  • —Querying holdings as part of an automated financial analysis pipeline

Fit

Best for

  • —Agents or apps that need on-demand portfolio holdings without managing API keys
  • —Developers experimenting with x402 micropayment-gated APIs
  • —Low-volume, pay-as-you-go portfolio data retrieval

Not for

  • —Users who need detailed API documentation or response schema guarantees before integrating
  • —High-frequency bulk data retrieval where per-call pricing adds up quickly

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/32/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/32/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge, but there is zero documentation: no OpenAPI spec, no request/response schema, no examples. The docs pages are empty wallet-connect stubs. The purpose of the endpoint can only be inferred from the URL path.

Warnings

  • —No API documentation available — /docs, /api, /pricing, and /README pages all return only a wallet connect prompt with no content.
  • —No request body schema documented; it is unknown what POST body the endpoint expects.
  • —No response schema or example response available; the actual data returned is unverified.
  • —The endpoint serves portfolio #32 specifically; it is unclear whether other portfolio IDs are accessible or what portfolio #32 represents.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:32:21Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

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