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/188/balance

What it does

This endpoint at lowpaymentfee.com provides an account balance lookup (account ID 188) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 "exact" scheme. The maximum amount required per call is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals).

The broader lowpaymentfee.com platform advertises a suite of APIs spanning data & analytics, AI/ML (sentiment analysis, 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 instant access. However, the specific endpoint being listed here is the account balance endpoint at /api/v1/accounts/188/balance, and no detailed documentation or schema for its request/response format was found in the crawl.

The endpoint is confirmed live — it returned a proper 402 challenge with x402 version 1 headers. The root site loads successfully (HTTP 200). Documentation pages (/docs, /pricing, /api, /README) all returned only a "Connect wallet" prompt with no substantive content, so the actual behavior, input parameters, and response schema of this specific endpoint remain unclear.

Capabilities

x402-paymentusdc-settlementbase-networkaccount-balancepay-per-calljson-response

Use cases

  • —Querying account balance data with per-call USDC micropayments
  • —Agent-driven balance lookups without API key registration
  • —Programmatic access to account information via x402 protocol

Fit

Best for

  • —Developers experimenting with x402 pay-per-call protocols
  • —Agents that need keyless, pay-as-you-go API access
  • —Use cases requiring low-cost ($0.02) per-request billing on Base

Not for

  • —Production workloads requiring detailed API documentation and SLAs
  • —Users who need free or subscription-based access rather than per-call crypto payments

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/188/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/188/balance
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 request/response schema, and the docs/pricing/README pages are all empty stubs. The purpose of the specific account balance endpoint is unclear beyond its URL path. Effectively a stub listing.

Warnings

  • —No API documentation available — /docs, /pricing, /api, and /README all return only a wallet-connect prompt with no content
  • —No request body schema or response schema documented for this endpoint
  • —The endpoint path includes a hardcoded account ID (188); unclear if this is parameterizable or a fixed resource
  • —The broader platform lists many API categories but none have visible documentation

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:45:41Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-29

Agent access

JSONhttps://clawmart.sh/api/listings/6raqWZ
x402-gated account balance endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart