x402basequality 0.25

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/118/balance

What it does

This endpoint at lowpaymentfee.com provides an account balance lookup via the x402 payment protocol. The specific resource `/api/v1/accounts/118/balance` is gated behind an x402 challenge requiring payment in USDC on the Base network. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. Payment is made via the "exact" scheme to a specified wallet address, with a timeout of 300 seconds.

The broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text 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 no minimum commitments. However, the specific endpoint being listed here is an account balance resource under `/api/v1/accounts/118/balance`, which does not appear in the site's public API catalog and has only the generic description "Premium API Access."

Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for this or any other endpoint on the platform. The endpoint is confirmed live (returns a proper 402 x402 challenge), but what the balance response actually contains is unknown.

Capabilities

x402-paymentusdc-baseaccount-balancepay-per-callno-api-key

Use cases

  • —Querying account balance information for account 118 via a single paid API call
  • —Demonstrating x402 payment protocol integration on Base network
  • —Agent-driven balance lookups without API key provisioning

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that can settle USDC payments on Base
  • —Use cases requiring keyless, pay-per-call API access

Not for

  • —Production workloads requiring documented response schemas and SLAs
  • —Users who need free or subscription-based access to balance data
  • —Anyone needing detailed API documentation before integration

Quick start

# The endpoint returns a 402 challenge. Supply an X-PAYMENT header with a valid x402 payment proof.
curl -X POST https://lowpaymentfee.com/api/v1/accounts/118/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/118/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is confirmed live via a valid 402 x402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the specific endpoint (/api/v1/accounts/118/balance) is not listed in the site's public catalog. The docs pages are empty. This is effectively a stub listing.

Warnings

  • —No documentation available — all doc/API/pricing/README pages render only 'Connect wallet' with no content
  • —This specific endpoint (/api/v1/accounts/118/balance) does not appear in the site's public API catalog
  • —No request or response schema is available; the actual response format is unknown
  • —The endpoint path references a hardcoded account ID (118), suggesting it may be account-specific rather than a general-purpose API

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:07:50Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/VrBj7v
x402-gated account balance endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart