x402basequality 0.35

Check account balance via x402 micropayment on Base network for $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/accounts/3/balance

What it does

This endpoint at lowpaymentfee.com provides account balance information behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.

The specific endpoint `/api/v1/accounts/3/balance` returns account balance data in JSON format. Payment is handled via the x402 protocol: callers include an X-PAYMENT header with a signed USDC payment of up to $0.02 (20,000 base units of USDC with 6 decimals) on Base. There are no API keys, no rate limits, and no signup required — access is granted purely through per-request micropayments.

The platform advertises additional endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more, all at the same $0.02 price point. Documentation pages exist but appear to require a wallet connection to view, so detailed request/response schemas are not publicly available. The endpoint is live and returns a proper 402 challenge when called without payment.

Capabilities

x402-paymentusdc-baseaccount-balancepay-per-requestno-api-keyjson-response

Use cases

  • —Querying account balance data without needing API keys or subscriptions
  • —Integrating pay-per-call balance lookups into automated agent workflows
  • —Demonstrating x402 protocol micropayment flows on Base network

Fit

Best for

  • —Agents or bots that need on-demand account balance data with no signup
  • —Developers exploring x402 protocol integrations
  • —Low-volume, pay-as-you-go API consumers who want to avoid subscriptions

Not for

  • —High-volume balance queries where $0.02/request adds up significantly
  • —Users who need detailed API documentation before integrating
  • —Applications requiring non-USDC or non-Base-network payment rails

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/3/balance \
  -H "X-PAYMENT: <x402-signed-payment-header>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/3/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but there is no OpenAPI schema, no documented request/response format, and the docs pages all just show 'Connect wallet' with no usable content. The endpoint's actual functionality (what 'accounts/3/balance' returns) is unclear beyond the generic 'Premium API Access' label. Effectively a stub listing.

Warnings

  • —No public API documentation available — docs, pricing, and README pages all require wallet connection and show no content.
  • —The specific purpose of /api/v1/accounts/3/balance is unclear; 'Premium API Access' is a generic label.
  • —No request or response schema is documented or inferrable from available material.
  • —The platform lists many endpoints but none have publicly visible documentation, raising questions about actual functionality.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:20:51Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-29

Agent access

JSONhttps://clawmart.sh/api/listings/CP8fNk
Check account balance via x402 micropayment on Base network for $0.02 per request. — Clawmart · Clawmart