x402basequality 0.35

Check account balance via x402 micropayment on Base network for $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/accounts/162/balance

What it does

This endpoint at lowpaymentfee.com returns account balance information for a specific account (ID 162) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request and settled in USDC on the Base network.

The endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an X-PAYMENT header with a valid payment proof. The x402 challenge specifies an exact-scheme payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is directed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

The platform advertises no API keys, no rate limits, and instant access. Documentation pages (/docs, /pricing, /README) appear to require wallet connection and contain no substantive content in the crawl. As a result, the actual response schema, request parameters, and detailed behavior of this specific balance endpoint are unknown. The endpoint is live and returning a proper 402 challenge.

Capabilities

x402-paymentusdc-baseaccount-balancepay-per-callno-api-keyjson-response

Use cases

  • —Querying account balance data programmatically with per-call USDC micropayments
  • —Integrating balance lookups into agent workflows without API key management
  • —Demonstrating x402 protocol payment flows on Base network

Fit

Best for

  • —Developers experimenting with x402 micropayment protocols
  • —Agents needing on-demand account balance data without subscription commitments
  • —Low-volume, pay-as-you-go API consumers on Base

Not for

  • —High-volume balance queries where per-call pricing adds up quickly
  • —Users who need detailed documentation or guaranteed SLAs
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/162/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/162/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no documentation content (all doc pages require wallet connection), no example request/response, and the purpose of this specific account balance endpoint is vague. The listing is essentially a stub with pricing and protocol details only.

Warnings

  • —Documentation pages (/docs, /pricing, /README) return no useful content — they all require wallet connection
  • —No request or response schema available; actual behavior of the balance endpoint is unknown
  • —The specific account ID 162 is hardcoded in the URL — unclear if this is a demo or a real account
  • —The broader platform lists many endpoints but none have documented schemas in the crawl

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:34:03Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/v4U9U6
Check account balance via x402 micropayment on Base network for $0.02 per request. — Clawmart · Clawmart