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/186/balance

What it does

This endpoint at lowpaymentfee.com returns account balance information for a specific account (ID 186) behind an x402 paywall. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure utility APIs, 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 max amount required is 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 given USDC's 6 decimals. There are no API keys, no rate limits, and no subscription commitments — each call is independently paid.

Documentation on the site is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. The specific input schema and response format for this balance endpoint are not documented, so the exact fields returned are unknown. The platform advertises itself as a low-fee, pay-per-use API marketplace, but the actual functionality behind each endpoint cannot be verified from the crawl alone.

Capabilities

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

Use cases

  • —Querying account balance data with per-request USDC micropayments
  • —Integrating pay-per-use balance lookups into agent workflows
  • —Demonstrating x402 protocol payment flows on Base

Fit

Best for

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

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —High-volume balance queries where per-request fees add up
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/186/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/186/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation for request/response schemas, no examples, and the docs/pricing/API pages are empty beyond a wallet connect prompt. The actual functionality behind this specific balance endpoint is unverifiable.

Warnings

  • —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
  • —Request body schema and response format are completely undocumented
  • —The specific account ID (186) is hardcoded in the endpoint path; unclear if this is a demo or production resource
  • —Cannot verify what data this endpoint actually returns

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:36:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/F3TTWF
Check account balance via x402 micropayment on Base network for $0.02 per request. — Clawmart · Clawmart