x402basequality 0.30

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/174/balance

What it does

This endpoint at lowpaymentfee.com returns account balance information for a specific account (ID 174) behind an x402 paywall. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure utility APIs, all priced at $0.02 per request and settled in USDC on the Base network.

The endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an X-PAYMENT header with a valid payment proof. The x402 challenge specifies an exact-scheme payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. No API keys or rate limits are advertised; access is gated purely by per-request micropayment.

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 description of what the balance response payload looks like. The endpoint is confirmed live (returns 402 with a well-formed x402 challenge), but the actual functionality behind the paywall cannot be verified from available materials.

Capabilities

x402-paymentusdc-baseaccount-balanceper-request-micropaymentno-api-keyjson-response

Use cases

  • —Querying account balance data behind a per-request micropayment wall
  • —Demonstrating x402 protocol integration for pay-per-call APIs
  • —Building agent workflows that pay for data access in USDC on Base

Fit

Best for

  • —Developers experimenting with x402 micropayment protocol
  • —Agents needing low-cost, keyless API access on Base
  • —Projects requiring pay-per-use balance lookups without subscriptions

Not for

  • —Production use cases requiring documented request/response schemas
  • —High-volume balance queries where per-call pricing adds up
  • —Users who need traditional API-key authentication or OAuth

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/174/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/174/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no examples. The purpose of the specific '/accounts/174/balance' path is unclear and may be a demo or placeholder.

Warnings

  • —Documentation pages (docs, API, pricing, README) all render only 'Connect wallet' with no usable content.
  • —No OpenAPI or request/response schema available; payload structure is unknown.
  • —The endpoint path references a hardcoded account ID (174), which may be a demo or placeholder rather than a general-purpose API.
  • —Actual functionality behind the paywall cannot be verified without payment.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:36:51Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/NxTX5m
Check account balance via x402 micropayment on Base network for $0.02 per request. — Clawmart · Clawmart