x402basequality 0.30

x402-gated account balance endpoint on Base, paid per-call in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/accounts/8/balance

What it does

This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path `/api/v1/accounts/8/balance`. It is part of a broader platform that offers dozens of x402-gated API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all payable per-request in USDC on the Base network with no API keys or rate limits required.

The specific endpoint probed (`/api/v1/accounts/8/balance`) returns an x402 challenge requesting up to 20,000 base units of USDC (0.02 USD) per call, consistent with the site's advertised flat $0.02/request pricing. Payment is settled on-chain via the "exact" scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.

Documentation is extremely thin — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no explanation of what the "balance" resource actually returns or what input parameters it expects. The endpoint is live (402 challenge confirmed), but without documentation it is difficult to determine the exact payload format or response structure.

Capabilities

x402-paymentusdc-settlementbase-networkper-request-pricingaccount-balancejson-api

Use cases

  • —Querying account balance data behind a per-call USDC paywall
  • —Integrating x402 payment flows into agent-driven workflows
  • —Demonstrating x402 protocol micropayments on Base

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that can settle USDC payments on Base
  • —Low-cost per-request API access without API key management

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integrating
  • —High-throughput use cases where per-call on-chain settlement adds latency
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/8/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/8/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The purpose of the 'accounts/8/balance' resource is unexplained. This is effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
  • —No OpenAPI or JSON schema for request or response bodies
  • —The specific resource '/api/v1/accounts/8/balance' is not described anywhere on the site; its purpose is unclear
  • —The hardcoded account ID '8' in the path suggests this may be a demo or placeholder endpoint

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:46:03Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/5jyF2G
x402-gated account balance endpoint on Base, paid per-call in USDC. — Clawmart · Clawmart