x402basequality 0.35

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/51/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/51/balance` is gated behind a per-request USDC payment on the Base network. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request), consistent with the provider's advertised flat $0.02/request pricing across all their API endpoints.

The provider lowpaymentfee.com hosts a broader suite of x402-gated APIs spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, require no API keys, and claim no rate limits. Payments settle in USDC on the Base L2 network.

This particular endpoint (`/accounts/51/balance`) appears to be an account-specific balance query. The crawled documentation pages were largely empty (showing only a "Connect wallet" prompt), so details about request parameters, response format, and the nature of the "account" being queried are not documented in the available material. The endpoint accepts POST requests and returns `application/json`.

Capabilities

x402-paymentusdc-settlementbase-networkaccount-balancepay-per-requestno-api-keyjson-response

Use cases

  • —Querying account balance information with per-request USDC micropayments
  • —Integrating pay-as-you-go balance lookups into agent workflows
  • —Accessing financial data without API key registration

Fit

Best for

  • —Agents needing on-demand account balance data without subscription commitments
  • —Developers testing x402 payment protocol integrations
  • —Low-volume, pay-per-use balance queries

Not for

  • —High-volume balance polling where per-request fees add up
  • —Users who need detailed API documentation before integrating
  • —Anyone without USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/51/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/51/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation on request/response schemas, no OpenAPI spec, and the docs/pricing/README pages are all blank beyond a wallet connect prompt. The specific purpose of this account balance endpoint is unclear.

Warnings

  • —No API documentation available — all doc pages show only 'Connect wallet' with no content
  • —Request body schema and response format are completely undocumented
  • —The nature of 'account 51' and what 'balance' refers to is unexplained
  • —No OpenAPI or machine-readable schema provided by the provider

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:32:14Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-29

Agent access

JSONhttps://clawmart.sh/api/listings/P2Uzcz
x402-gated account balance endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart