x402basequality 0.35

Check wallet BAL token balance via x402 micropayment on Base for $0.02 per request.

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

What it does

This endpoint at lowpaymentfee.com provides a wallet balance lookup for the BAL token, accessible via the x402 payment protocol. It is part of a broader suite of pay-per-call APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform share a uniform $0.02-per-request pricing model, settled in USDC on the Base network.

The specific endpoint `/api/v1/wallet/BAL/balance` accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers attach an `X-PAYMENT` header containing a signed USDC payment of up to 0.02 USDC (maxAmountRequired = 20000 base units, USDC has 6 decimals) to the provider's address on Base. No API keys or accounts are required — access is granted per-request upon valid payment. The provider advertises no rate limits and instant access.

Documentation beyond the landing page is extremely thin — the /docs, /api, /pricing, and /README pages all resolve to a wallet-connect prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what fields the balance response contains or what input parameters (if any) the POST body expects. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes integration speculative.

Capabilities

wallet-balance-lookupx402-paymentusdc-settlementbase-networkpay-per-requestno-api-key

Use cases

  • —Querying BAL token balance for a given wallet address
  • —Integrating on-chain balance checks into automated trading or portfolio dashboards
  • —Agent-driven wallet monitoring without API key management

Fit

Best for

  • —Developers needing quick, keyless wallet balance lookups
  • —AI agents that can settle micropayments via x402 on Base
  • —Applications requiring pay-per-call pricing with no subscription commitment

Not for

  • —Bulk or high-volume balance queries where per-call fees add up quickly
  • —Users who need detailed documentation or guaranteed SLAs
  • —Querying balances for tokens other than BAL (this endpoint is BAL-specific)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/wallet/BAL/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-signed-payment-header>" \
  -d '{"address": "0xYourWalletAddress"}'

Example

Request

{
  "address": "0x1234567890abcdef1234567890abcdef12345678"
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/wallet/BAL/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, and all documentation pages are empty wallet-connect stubs. The request body and response structure are entirely inferred.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README pages all return only a wallet-connect prompt with no content.
  • —No OpenAPI or schema definition found; request and response formats are unknown.
  • —The example request JSON is speculative — the actual required POST body is not documented.
  • —It is unclear what 'BAL' refers to (possibly Balancer token, but unconfirmed).

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 14:31:42Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/qEhdsC
Check wallet BAL token balance via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart