x402basequality 0.30

x402-gated account balance endpoint on Base, pay-per-call with USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/accounts/61/balance

What it does

This endpoint at lowpaymentfee.com provides an account balance lookup via the x402 payment protocol. The specific resource `/api/v1/accounts/61/balance` is described as "Premium API Access" and accepts POST requests. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals).

The broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments.

However, the specific endpoint being listed here — `/api/v1/accounts/61/balance` — does not appear in the platform's published API catalog. Its exact response format and purpose are unclear beyond the generic "Premium API Access" label. No OpenAPI schema, detailed documentation, or example responses were found during the crawl (docs, pricing, and API pages all returned only a "Connect wallet" prompt). The endpoint is confirmed live via a valid 402 challenge.

Capabilities

x402-paymentusdc-settlementbase-networkaccount-balancepay-per-callno-api-key

Use cases

  • —Querying account balance data via a single paid API call
  • —Integrating pay-per-use balance lookups into agent workflows
  • —Accessing premium data without API key registration

Fit

Best for

  • —Agents that can settle x402 payments in USDC on Base
  • —Developers wanting zero-signup, pay-per-call API access
  • —Automated workflows needing on-demand account balance checks

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume use cases where per-call pricing may add up without bulk discounts
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/61/balance \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/61/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (valid 402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation, no example responses, and the specific endpoint path does not appear in the site's own catalog. The docs/pricing/API pages all returned only a wallet-connect prompt with no useful content.

Warnings

  • —The endpoint /api/v1/accounts/61/balance is not listed in the platform's published API catalog — its purpose and response schema are unknown.
  • —No documentation, OpenAPI spec, or example responses are available; all doc pages returned only 'Connect wallet'.
  • —The endpoint description 'Premium API Access' is generic and does not describe what data is returned.
  • —The platform lists many API categories (AI, finance, analytics, etc.) but none could be verified for actual functionality.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:34:26Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/TF9uKb
x402-gated account balance endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart