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/39/balance

What it does

This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path `/api/v1/accounts/39/balance`. It is part of a broader platform that offers dozens of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints on the platform are gated via the x402 payment protocol, settling in USDC on the Base network.

The specific endpoint probed (`/api/v1/accounts/39/balance`) returns a 402 challenge requesting up to 20,000 base units of USDC (0.02 USD) per call, consistent with the site's advertised flat $0.02/request pricing. Payment is made via the x402 `exact` scheme to the specified wallet address. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.

The exact purpose of the `/accounts/39/balance` endpoint is not documented beyond the generic "Premium API Access" label. Based on the path structure, it likely returns balance information for account ID 39, but no response schema, request body schema, or detailed documentation was found. The docs, pricing, API, and README pages all rendered only a "Connect wallet" prompt with no substantive content. Without further documentation it is unclear what data this specific endpoint returns or what input it expects beyond a POST request.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestaccount-balancejson-response

Use cases

  • —Querying account balance data with per-request USDC micropayments
  • —Integrating x402-compatible agents that pay for API access on-the-fly
  • —Accessing paid data endpoints without API key registration

Fit

Best for

  • —Agents or applications that support x402 payment protocol
  • —Users who want keyless, pay-per-use API access
  • —Developers building on Base network with USDC settlement

Not for

  • —Users who need detailed API documentation or response schemas before integrating
  • —Applications requiring free or subscription-based access models
  • —Use cases needing high-throughput batch queries (no documented rate limits, but per-call payment adds overhead)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/39/balance \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/39/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but there is no documentation, no response schema, no request body schema, and no examples. The specific endpoint's purpose is unclear beyond its URL path. Docs pages are empty (wallet-connect only).

Warnings

  • —No API documentation available — docs, pricing, API, and README pages all show only a 'Connect wallet' prompt with no content.
  • —The specific purpose of /api/v1/accounts/39/balance is undocumented; the path suggests account-specific balance data but this is inferred.
  • —No response schema or example response is available.
  • —No request body schema is documented; the endpoint accepts POST but required fields are unknown.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:30:00Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/wkVbW6
x402-gated account balance endpoint on Base, paid per-call in USDC. — Clawmart · Clawmart