x402basequality 0.30

x402-gated account balance endpoint on Base, paid per-call in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/accounts/49/balance

What it does

This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path `/api/v1/accounts/49/balance`. It is part of a broader platform that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all gated via the x402 payment protocol on the Base network.

The specific endpoint probed returns an account balance (for account ID 49) and accepts POST requests. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) using the x402 "exact" scheme. The maximum amount required per call is 20,000 base units of USDC, which with 6 decimals equals $0.02 USD — consistent with the platform's advertised flat $0.02/request pricing across all endpoints. No API keys are required; access is granted purely through the x402 payment header. The platform advertises no rate limits and instant access.

Documentation on the site is extremely thin — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response format after payment is unknown. The platform lists many other endpoints (sentiment analysis, text summarization, geocoding, gas estimates, etc.) at the same $0.02 price point, but none have documented schemas.

Capabilities

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

Use cases

  • —Querying account balance data via a single paid API call
  • —Integrating x402-compatible payment flows into agent workflows
  • —Accessing pay-per-call services without API key management

Fit

Best for

  • —Developers experimenting with x402 payment protocol integrations
  • —Agents that need simple pay-per-call access without subscription overhead
  • —Low-volume, on-demand account balance lookups

Not for

  • —Production use requiring documented request/response schemas
  • —High-volume balance queries where $0.02/call adds up quickly
  • —Users who need detailed API documentation before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/49/balance \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/49/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 ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no usage examples, and all documentation pages are empty beyond a wallet connect prompt. The actual purpose and output of this specific endpoint (account 49 balance) is opaque.

Warnings

  • —No API documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content
  • —No request or response schema documented; actual output format after payment is unknown
  • —The specific endpoint path (/api/v1/accounts/49/balance) suggests a hardcoded account ID with unclear utility for general consumers
  • —Platform lists many endpoints across diverse domains (AI, finance, geocoding) all at $0.02 — unclear if these are functional or placeholder

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:37:46Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/tb3gFw
x402-gated account balance endpoint on Base, paid per-call in USDC. — Clawmart · Clawmart