x402basequality 0.30

x402-gated account balance endpoint on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/accounts/140/balance

What it does

This endpoint at lowpaymentfee.com provides a "Premium API Access" account balance resource at `/api/v1/accounts/140/balance`. It is part of a broader platform offering dozens of x402-payable API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.

The specific endpoint probed (`/api/v1/accounts/140/balance`) returns a live x402 challenge (HTTP 402) requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this converts to $0.02 per call. Payment is made via the x402 "exact" scheme, with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.

The platform advertises no API keys, no rate limits, and instant access. However, documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all resolve to a minimal "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the balance response actually contains. The endpoint path suggests it returns balance information for account ID 140, but the exact payload structure is unknown.

Capabilities

x402-paymentusdc-settlementbase-networkaccount-balancejson-responsepay-per-requestno-api-key

Use cases

  • —Querying account balance data for account 140 via a single paid API call
  • —Integrating x402-compatible agents that autonomously pay for API access in USDC
  • —Demonstrating x402 payment protocol flows on the Base network

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —AI agents that need to autonomously purchase API access with USDC on Base
  • —Projects requiring keyless, pay-per-request API access

Not for

  • —Production use cases requiring documented request/response schemas
  • —Users who need free or subscription-based API access
  • —Applications needing high-throughput bulk queries (no documented rate limits but no SLA either)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/140/balance
# Returns HTTP 402 with x402 challenge.
# Include X-PAYMENT header with a valid x402 payment proof to receive the response.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/140/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. However, there is no documentation, no OpenAPI schema, no request/response examples, and the docs/pricing/README pages are all empty stubs showing only 'Connect wallet'. The purpose of this specific endpoint (account 140 balance) is unclear.

Warnings

  • —No documentation available — all doc pages resolve to a minimal 'Connect wallet' stub
  • —No OpenAPI or request/response schema provided; payload structure is unknown
  • —The endpoint path references a specific account ID (140) with no explanation of what this represents
  • —Platform lists many endpoints but none have documented schemas or example responses

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:19:48Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/hCQdag
x402-gated account balance endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart