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/79/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio ID 79. 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 gated behind the x402 payment protocol on the Base network.

The specific endpoint `/api/v1/portfolios/79/holdings` accepts POST requests and is priced at $0.02 per call (20,000 base units of USDC on Base, which uses 6 decimals). Payment is settled on-chain via USDC (contract 0x8335…2913) to the payTo address. No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

Documentation on the site 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 schema, no request/response examples, and no description of what the holdings response actually contains. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation means callers must experiment to discover the expected POST body and response shape.

Capabilities

x402-paymentportfolio-holdingsusdc-basepay-per-requestno-api-key

Use cases

  • —Fetching holdings data for a specific portfolio via micropayment
  • —Integrating portfolio data into automated trading or analytics pipelines
  • —Querying investment positions without needing an API key or subscription

Fit

Best for

  • —Agents or bots that need on-demand portfolio holdings data with no signup
  • —Developers experimenting with x402 pay-per-call patterns on Base
  • —Low-volume consumers who want to avoid subscription commitments

Not for

  • —Users who need detailed API documentation or guaranteed schema stability
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone needing holdings for arbitrary portfolio IDs (this endpoint is hardcoded to portfolio 79)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/79/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/79/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it works. However, there is no OpenAPI schema, no request/response examples, and the docs pages are empty stubs. The purpose of 'portfolio 79 holdings' is unexplained. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.
  • —No request body schema or response schema provided; callers must guess the expected input.
  • —The endpoint is specific to portfolio ID 79 with no explanation of what this portfolio represents.
  • —The broader platform lists many endpoints but none have documented schemas or examples.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:02:25Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/5TTuxR
Retrieve portfolio holdings data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart