x402basequality 0.30

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/41/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/41/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 site-wide $0.02/request pricing advertised across all endpoints.

The provider lowpaymentfee.com hosts a broader suite of APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02 per-request pricing model with no API keys, no rate limits, and no minimum commitments. Payment is settled in USDC on the Base L2 network via the x402 exact-payment scheme.

The specific endpoint probed here (`/api/v1/accounts/41/balance`) is described only as "Premium API Access" with no further documentation on request parameters or response format. The docs, pricing, API, and README pages on the site all render only a "Connect wallet" prompt with no additional content, so the actual behavior and output schema of this endpoint remain unclear.

Capabilities

x402-paymentusdc-settlementbase-networkaccount-balancepay-per-requestno-api-key

Use cases

  • —Querying account balance information via a single paid API call
  • —Integrating pay-per-request balance lookups into agent workflows
  • —Demonstrating x402 payment protocol integration on Base

Fit

Best for

  • —Developers experimenting with x402 payment-gated APIs
  • —Agents needing on-demand account balance data without API key management
  • —Low-volume, pay-as-you-go API consumption

Not for

  • —High-volume balance queries where per-request fees add up
  • —Use cases requiring detailed API documentation or guaranteed SLAs
  • —Users who need non-crypto payment options

Quick start

# 1. Send a POST to get the 402 challenge
curl -X POST https://lowpaymentfee.com/api/v1/accounts/41/balance
# Response: 402 with x402 payment challenge
# 2. Construct X-PAYMENT header with USDC payment proof on Base
# 3. Resend request with the header to receive the balance data

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/41/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation on request parameters, response schema, or what 'account balance' actually returns. The docs pages are empty beyond a wallet connect prompt, making this effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
  • —No request or response schema provided; actual endpoint behavior is unknown
  • —The specific endpoint path (/api/v1/accounts/41/balance) with a hardcoded account ID '41' is unusual and unexplained
  • —Cannot verify what data this endpoint actually returns without making a paid request

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:30:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/avweuX