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/163/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/163/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), settled to a specified wallet address. The endpoint accepts POST requests and returns JSON.

The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance and crypto data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no commitments required — payment is handled entirely via the x402 protocol on the Base L2 network using USDC.

However, this specific endpoint (`/api/v1/accounts/163/balance`) is labeled only as "Premium API Access" with no further documentation on what the balance response contains or what account 163 refers to. The docs, pricing, and API pages on the site returned only a "Connect wallet" prompt with no additional technical detail. Without schema documentation or example responses, the actual data returned by this endpoint is unknown.

Capabilities

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

Use cases

  • —Querying account balance data with per-request USDC micropayments
  • —Agent-driven balance lookups without API key management
  • —Programmatic access to account information via x402 payment gating

Fit

Best for

  • —Agents or services that need keyless, pay-per-call API access
  • —Developers experimenting with x402 payment protocol on Base
  • —Scenarios where per-request billing is preferred over subscriptions

Not for

  • —Users who need detailed API documentation or response schemas before integrating
  • —High-volume use cases where per-request pricing may add up compared to flat-rate plans
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/163/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/163/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC per call on Base), but there is no documentation on what the endpoint returns, no OpenAPI schema, no example responses, and the docs/pricing/API pages are all empty beyond a wallet-connect prompt. The specific resource path (/api/v1/accounts/163/balance) is unexplained.

Warnings

  • —No documentation available — docs, pricing, and API pages all return only a 'Connect wallet' prompt with no technical content.
  • —The meaning of 'account 163' and what 'balance' data is returned are completely undocumented.
  • —No OpenAPI spec, no response schema, and no example responses are available.
  • —The broader platform lists many API categories (AI, finance, analytics, etc.) but none have visible documentation beyond titles and prices.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:34:31Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

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