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/1/balance

What it does

This endpoint at lowpaymentfee.com returns account balance information, accessible via the x402 payment protocol on the Base network. The endpoint charges 0.02 USDC per request (20,000 base units with 6 decimals) settled in USDC on Base. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The provider operates a broader platform offering multiple API categories including data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are uniformly priced at $0.02 per request.

The specific endpoint probed (`/api/v1/accounts/1/balance`) appears to be an account balance lookup. However, documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of what fields the balance response contains or what the account ID parameter represents. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the lack of documentation makes it difficult to assess actual functionality.

Capabilities

x402-paymentusdc-baseaccount-balancemicropaymentno-api-keypay-per-request

Use cases

  • —Querying account balance data with per-request micropayments
  • —Agent-driven balance lookups without pre-registration or API keys
  • —Integrating pay-as-you-go account data into automated workflows

Fit

Best for

  • —Developers wanting zero-signup API access via x402
  • —AI agents that can settle USDC payments on Base
  • —Low-volume or sporadic balance queries where per-call pricing is preferable

Not for

  • —High-volume balance polling where $0.02/request adds up quickly
  • —Users who need detailed API documentation or guaranteed SLAs
  • —Applications requiring non-crypto payment methods

Quick start

# 1. Send a POST to get the 402 challenge:
curl -X POST https://lowpaymentfee.com/api/v1/accounts/1/balance
# Response: 402 with x402 payment challenge
# 2. Construct an X-PAYMENT header using the x402 client SDK,
#    paying 0.02 USDC on Base to the specified payTo address.
# 3. Resend with the header:
curl -X POST https://lowpaymentfee.com/api/v1/accounts/1/balance \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/1/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid 402 x402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no example request/response, and all documentation pages render only 'Connect wallet' with no technical content. The actual functionality of the balance endpoint is unclear.

Warnings

  • —No API documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or JSON schema describing request parameters or response format
  • —Unknown what 'accounts/1/balance' returns or what the account ID represents
  • —The broader platform lists many endpoints (AI, finance, utils) but none have documented behavior

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:15:23Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-30

Agent access

JSONhttps://clawmart.sh/api/listings/xd22Um
Check account balance via x402 micropayment on Base network for $0.02 per request. — Clawmart · Clawmart