x402basequality 0.30

x402-gated portfolio transactions endpoint on Base, paid per-call in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/56/transactions

What it does

This endpoint at lowpaymentfee.com exposes a POST-based API for portfolio transactions at `/api/v1/portfolios/56/transactions`. It is part of a broader platform (lowpaymentfee.com) that offers dozens of x402-payable endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints on the platform use the x402 protocol on the Base network, settling in USDC.

The specific endpoint probed here returns a valid x402 challenge with a maximum amount of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). The platform advertises uniform $0.02/request pricing across all its APIs, with no API keys, no rate limits, and no minimum commitments required. Payment is made via the x402 `exact` scheme to a specified wallet address on Base.

Documentation on the site 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 expects as input. The endpoint's purpose (portfolio transaction data, creation, or something else) cannot be confirmed from available material.

Capabilities

x402-paymentusdc-settlementbase-networkpost-endpointportfolio-transactionsper-call-pricing

Use cases

  • —Submitting or retrieving portfolio transaction data via a pay-per-call model
  • —Integrating portfolio transaction operations into agent workflows without API key management
  • —Programmatic access to portfolio data settled in USDC on Base

Fit

Best for

  • —Developers wanting keyless, pay-per-request portfolio transaction access
  • —AI agents that can settle x402 payments on Base
  • —Users who prefer micro-payment models over subscription APIs

Not for

  • —Users needing detailed API documentation or request/response schemas before integration
  • —High-volume use cases where per-call pricing may add up compared to flat-rate plans
  • —Anyone unable to pay in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/56/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/56/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the endpoint does beyond the generic label 'Premium API Access'. The docs pages are empty. This is effectively a stub listing.

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; the expected POST body and response format are unknown.
  • —The specific purpose of /api/v1/portfolios/56/transactions is unclear — it could be transaction creation, retrieval, or something else.
  • —The hardcoded portfolio ID '56' in the URL suggests this may be a demo or placeholder endpoint.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:47:48Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/pvKkjY
x402-gated portfolio transactions endpoint on Base, paid per-call in USDC. — Clawmart · Clawmart