x402basequality 0.35

Query ATOM wallet balances 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/ATOM/balance

What it does

This endpoint at lowpaymentfee.com returns ATOM (Cosmos) wallet balance data, gated behind the x402 payment protocol. Callers pay $0.02 per request in USDC on the Base network — no API keys, no rate limits, and no sign-up required. The payment is settled on-chain via the x402 "exact" scheme, meaning a single fixed payment per call.

The provider hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all at the same $0.02 price point. This specific endpoint focuses on cryptocurrency wallet balance lookups for the ATOM token. The response MIME type is application/json. The endpoint accepts POST requests.

Documentation beyond the landing page is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the actual request body format and response structure must be discovered experimentally.

Capabilities

crypto-wallet-balanceatom-balance-lookupx402-paymentusdc-base-settlementpay-per-requestno-api-key

Use cases

  • —Querying the balance of an ATOM/Cosmos wallet address programmatically
  • —Building portfolio trackers that need real-time ATOM balance data
  • —Automated monitoring of ATOM wallet balances in trading bots or dashboards

Fit

Best for

  • —Developers needing on-demand ATOM wallet balance queries without API key management
  • —Agents or bots that can settle x402 micropayments on Base
  • —Low-volume or sporadic balance lookups where pay-per-call is more economical than a subscription

Not for

  • —High-frequency balance polling where $0.02/request adds up quickly
  • —Users who need balances for many different chains in a single call
  • —Anyone without a Base-compatible USDC wallet to settle x402 payments

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/wallet/ATOM/balance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{"address": "cosmos1..."}'

Example

Request

{
  "address": "cosmos1exampleaddress123"
}

Endpoint

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

Quality

0.35/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no examples, and all doc pages are empty stubs. The request body format and response structure are entirely unknown and must be guessed.

Warnings

  • —No API documentation available — /docs, /pricing, /api, and /README pages are all empty beyond a wallet-connect prompt
  • —No OpenAPI or schema definition; request body format is unknown and the example_request_json is speculative
  • —No response schema or example response available
  • —Provider description is generic ('Premium API Access') with no endpoint-specific detail

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 14:32:11Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/nTGRuP
Query ATOM wallet balances via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart