x402basequality 0.35

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/95/transactions

What it does

This endpoint at lowpaymentfee.com exposes a POST-based transactions API for portfolio #95, gated behind the x402 payment protocol. It accepts USDC payments on the Base network at $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the resource.

The hosting site lowpaymentfee.com offers a broad catalog of x402-gated APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities, all priced uniformly at $0.02 per request. This specific endpoint appears to serve portfolio transaction data or accept transaction submissions for portfolio ID 95. However, the exact request body schema and response format are undocumented — the crawled docs pages returned only a "Connect wallet" stub with no further technical detail.

The endpoint is confirmed live: it returns a well-formed x402 version 1 challenge with scheme "exact", settling to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 on Base. The asset is USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). Timeout is 300 seconds. Because no OpenAPI spec, request/response schemas, or detailed documentation were found, the actual functionality behind this endpoint remains opaque.

Capabilities

x402-paymentusdc-settlementbase-networkportfolio-transactionspay-per-callno-api-keypost-endpoint

Use cases

  • —Submitting or retrieving transactions for a specific portfolio via micropayment
  • —Integrating pay-per-call portfolio data into an agent workflow
  • —Accessing financial transaction data without API key registration

Fit

Best for

  • —Agents that can settle x402 payments in USDC on Base
  • —Developers wanting keyless, pay-per-use portfolio transaction access
  • —Automated workflows needing low-friction API access at $0.02/call

Not for

  • —Users needing detailed API documentation or guaranteed SLAs before integration
  • —High-volume batch processing where per-call pricing adds up quickly
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/95/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/95/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live with a valid x402 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 listing, and the docs/pricing/README pages all returned only 'Connect wallet' stubs. The actual functionality of this specific endpoint is unknown.

Warnings

  • —No request or response schema documented — actual input/output format is unknown
  • —All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no technical content
  • —The purpose of 'portfolios/95/transactions' is unclear — it could be a demo or placeholder endpoint
  • —No OpenAPI or machine-readable spec available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:06:35Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/FC3xV4