x402basequality 0.30

x402-gated portfolio transactions endpoint on Base, pay-per-call with USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/32/transactions

What it does

This endpoint at lowpaymentfee.com provides access to portfolio transaction data via a POST request to `/api/v1/portfolios/32/transactions`. It is part of a broader platform (lowpaymentfee.com) that offers a variety of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all settled on the Base network using USDC.

The specific endpoint probed here returns an x402 challenge with a `maxAmountRequired` of 20,000 base units of USDC (the asset at `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base). Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site's advertised flat pricing of $0.02/request across all endpoints. The platform advertises no API keys, no rate limits, and instant access — payment is handled entirely via the x402 protocol's `X-PAYMENT` header.

Documentation is extremely sparse. The docs, API, pricing, 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 the portfolio transactions endpoint actually returns or what parameters it accepts. The endpoint's purpose (portfolio transaction data) is inferred solely from the URL path. The platform hosts many other endpoints but this listing covers only the `/api/v1/portfolios/32/transactions` route.

Capabilities

x402-paymentusdc-settlementbase-networkportfolio-transactionspay-per-requestno-api-keypost-method

Use cases

  • —Retrieving transaction history for a specific portfolio
  • —Integrating portfolio transaction data into automated trading or analytics pipelines
  • —Agent-driven portfolio monitoring with per-call USDC payments

Fit

Best for

  • —Developers wanting keyless, pay-per-request access to portfolio data
  • —AI agents that can settle x402 payments on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed API documentation or request/response schemas before integrating
  • —High-volume consumers who need bulk pricing or subscription discounts
  • —Anyone without a Base-compatible USDC wallet

Quick start

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

Endpoint

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

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, confirming it is operational. However, there is no OpenAPI schema, no documentation of request parameters or response format, and no examples. The endpoint's actual functionality is inferred only from the URL path. Docs pages are empty beyond a wallet-connect prompt.

Warnings

  • —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet' with no content.
  • —No OpenAPI or request/response schema provided; request body format and response structure are unknown.
  • —The specific purpose of /api/v1/portfolios/32/transactions (what portfolio '32' refers to, what data is returned) is entirely unclear.
  • —Platform appears to be a demonstration or early-stage service with many generic endpoint categories but no substantive documentation.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:35:17Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/Ub8dUZ
x402-gated portfolio transactions endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart