x402basequality 0.30

x402-gated account balance endpoint on Base, paid per-call in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/accounts/63/balance

What it does

This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path `/api/v1/accounts/63/balance`. It is part of a broader platform that offers dozens of x402-payable API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all settled on the Base network using USDC.

The specific endpoint probed returns an account balance (for account ID 63) and accepts POST requests. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. The platform advertises a flat $0.02/request pricing model across all its endpoints, with no API keys, no rate limits, and no minimum commitments.

The endpoint is live and returned a proper 402 challenge during probing. However, documentation is extremely thin — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for what the balance response actually contains. The endpoint's purpose (returning an "account balance") is vaguely described, and it is unclear what "account 63" refers to or what the response payload looks like.

Capabilities

x402-paymentusdc-settlementbase-networkaccount-balanceper-call-pricingno-api-key

Use cases

  • —Querying account balance data with per-call USDC micropayments
  • —Integrating x402-compatible payment flows into agent workflows
  • —Accessing paid API resources without API key registration

Fit

Best for

  • —Developers experimenting with x402 protocol payments
  • —Agents that can settle USDC on Base for per-call API access
  • —Low-volume consumers who want pay-as-you-go pricing without subscriptions

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integration
  • —High-volume consumers who need bulk pricing or rate-limit guarantees
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/63/balance \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/63/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI schema, no request/response examples, and all documentation pages render only 'Connect wallet' with no content. The purpose of this specific endpoint (account 63 balance) is unclear, and no response format is documented.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —All doc/pricing/README pages return only a 'Connect wallet' prompt with no substantive content
  • —The meaning of 'account 63 balance' is undocumented — unclear what data is returned
  • —No response examples or field definitions available
  • —The broader platform lists many endpoints but none have documented schemas

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:32:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/QxSdJU
x402-gated account balance endpoint on Base, paid per-call in USDC. — Clawmart · Clawmart