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/43/balance

What it does

This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path `/api/v1/accounts/43/balance`. It is part of a broader platform that offers dozens of x402-gated API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all payable per-request in USDC on the Base network with no API keys or rate limits required.

The specific endpoint probed (`/api/v1/accounts/43/balance`) returns an x402 challenge requesting up to 20,000 base units of USDC (0.02 USD) per call, consistent with the site's advertised flat $0.02/request pricing. Payment is settled on-chain via the "exact" scheme to address `0x1A2B…85F3` using the canonical Base USDC contract (`0x8335…2913`). The challenge specifies a 300-second timeout and expects HTTP POST requests.

Documentation is extremely thin — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples. The endpoint name ("accounts/43/balance") suggests it returns an account balance, but the exact request body format and response shape are unknown. The platform appears to be a demonstration or early-stage service showcasing low-fee x402 micropayments rather than a mature, documented API product.

Capabilities

x402-paymentusdc-baseper-request-billingaccount-balanceno-api-keymicropayment

Use cases

  • —Querying an account balance via a pay-per-call x402 endpoint
  • —Demonstrating x402 micropayment protocol integration on Base
  • —Agent-driven on-chain payment for API access without API keys

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that can settle USDC micropayments on Base
  • —Use cases needing keyless, pay-per-request API access

Not for

  • —Production workloads requiring documented request/response schemas
  • —Users who need fiat or off-chain payment options
  • —High-throughput use cases where $0.02/request adds up quickly

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/43/balance
# Returns 402 with x402 challenge; attach X-PAYMENT header with signed USDC payment on Base to access.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/43/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The purpose of this specific endpoint (account 43 balance) is unclear and may be a demo. Docs pages are empty beyond a wallet-connect prompt.

Warnings

  • —No OpenAPI spec or request/response schema available
  • —All documentation pages render only 'Connect wallet' with no content
  • —The endpoint path '/api/v1/accounts/43/balance' appears to reference a specific hardcoded account (43) — purpose and generalizability are unclear
  • —Platform may be a demo or early-stage project; maturity is uncertain

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:30:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

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