x402basequality 0.30

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/159/balance

What it does

This endpoint at lowpaymentfee.com returns account balance information for a specific account (account ID 159) behind an x402 paywall. It is part of a broader platform offering numerous pay-per-call API endpoints across data analytics, AI/ML, finance/Web3, and infrastructure categories, 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. No API keys or rate limits are advertised; access is gated purely by micropayment.

Documentation is extremely sparse. The landing page lists available endpoints and pricing, but the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the balance response contains. The endpoint is live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know exactly what data is returned or what input parameters (if any) the POST body should contain.

Capabilities

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

Use cases

  • —Querying account balance data programmatically with per-call USDC micropayments
  • —Integrating balance checks into agent workflows that support x402 payment protocol
  • —Accessing financial account information without traditional API key registration

Fit

Best for

  • —Developers or agents already set up for x402 payments on Base
  • —Use cases requiring no-signup, pay-as-you-go API access
  • —Lightweight balance lookups where $0.02/call is acceptable

Not for

  • —Users needing detailed API documentation or response schema before integrating
  • —High-volume balance polling where per-call costs would accumulate quickly
  • —Anyone without a Base-network USDC wallet or x402-compatible client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/159/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/159/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, but there is no OpenAPI schema, no documentation beyond a landing page listing, no request/response examples, and the /docs page is empty. The specific purpose of this particular endpoint (account 159 balance) is unclear and undocumented.

Warnings

  • —No OpenAPI or schema documentation available — request body and response format are unknown
  • —All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content
  • —The endpoint path references a hardcoded account ID (159); unclear if this is a demo or production resource
  • —The broader platform lists many endpoints but none have documented schemas or examples

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:30:31Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/Y5eL2g
Check account balance via x402 micropayment on Base network for $0.02 per request. — Clawmart · Clawmart