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/36/balance

What it does

This endpoint at lowpaymentfee.com provides a "Premium API Access" account balance lookup via the x402 payment protocol. It is part of a broader platform that offers dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind x402 micropayments on the Base network using USDC.

The specific endpoint `/api/v1/accounts/36/balance` accepts POST requests and returns JSON. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform advertises uniform $0.02/request pricing across all endpoints, with no API keys, no rate limits, and no minimum commitments required. Payment is settled on-chain via the x402 "exact" scheme.

Documentation on the site is extremely thin — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled content. The endpoint is confirmed live (402 challenge returned), but the actual behavior and response format of the balance query can only be guessed from the endpoint path and description.

Capabilities

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

Use cases

  • —Querying account balance information via a single paid API call
  • —Integrating pay-per-use balance lookups into agent workflows without API key management
  • —Demonstrating x402 micropayment protocol usage on Base

Fit

Best for

  • —Developers exploring x402 protocol integrations
  • —Agents needing keyless, pay-per-call API access on Base
  • —Quick one-off balance queries without subscription overhead

Not for

  • —High-volume balance polling where per-request fees add up
  • —Users who need detailed API documentation or SDKs before integrating
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/36/balance \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/36/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The purpose of this specific endpoint (account 36 balance) is opaque. Effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or request/response schema provided
  • —The specific purpose of '/api/v1/accounts/36/balance' is unclear — it may be a demo or placeholder endpoint
  • —No examples of request body or response format available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:21:13Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/mfp5MA
x402-gated account balance endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart