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/132/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/132/balance` is described as "Premium API Access" and accepts POST requests. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals).

The broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/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 minimum commitments required.

Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for what the account balance endpoint actually returns or what parameters it accepts. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the lack of documentation makes it difficult to use without experimentation.

Capabilities

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

Use cases

  • —Querying account balance data with per-request USDC micropayments
  • —Agent-driven API access without pre-registration or API keys
  • —Programmatic balance lookups settled on Base L2

Fit

Best for

  • —Developers wanting zero-signup, pay-per-call API access
  • —AI agents that can handle x402 payment challenges natively
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integrating
  • —High-volume use cases where per-request pricing may add up versus flat-rate plans
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/132/balance \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/132/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. No OpenAPI schema, no request/response examples, and no description of what the account balance endpoint actually returns or accepts. The listing is effectively a stub.

Warnings

  • —Documentation pages (docs, API, pricing, README) all render only 'Connect wallet' with no usable content
  • —No OpenAPI or schema available — request parameters and response format are unknown
  • —The specific endpoint path '/api/v1/accounts/132/balance' includes a hardcoded account ID (132); unclear if this is parameterizable
  • —No request or response examples available anywhere in crawled content

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:17:26Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

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