x402basequality 0.30

Check account 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/accounts/123/balance

What it does

This endpoint at lowpaymentfee.com provides account balance information behind an x402 paywall. The specific resource `/api/v1/accounts/123/balance` accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals).

The provider operates a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments — payment is handled entirely through the x402 protocol.

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 spec, no request/response schema documentation, and no usage examples. The specific account balance endpoint probed here uses a hardcoded account ID (123), and it is unclear whether the path supports arbitrary account IDs or what fields the response contains. The endpoint is confirmed live (402 challenge returned successfully).

Capabilities

x402-paymentusdc-baseaccount-balancepay-per-requestno-api-keyjson-response

Use cases

  • —Querying account balance data with per-request USDC micropayments
  • —Integrating pay-as-you-go balance lookups into agent workflows
  • —Accessing financial data without API key registration

Fit

Best for

  • —Developers wanting zero-signup API access paid via crypto
  • —AI agents that can settle x402 payments on Base
  • —Quick one-off balance queries without subscription overhead

Not for

  • —Users needing detailed API documentation or response schemas before integration
  • —High-volume use cases where per-request pricing may add up
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/123/balance
# Returns 402 with x402 challenge; attach X-PAYMENT header with signed USDC payment on Base to complete the request.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/123/balance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns 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, no examples, and the specific endpoint path contains a hardcoded account ID with no explanation. The platform's purpose and data sources are unclear.

Warnings

  • —Documentation pages (docs, API, pricing, README) all render only 'Connect wallet' with no usable content
  • —No OpenAPI or schema available — request body and response format are completely unknown
  • —The probed path uses a hardcoded account ID (123); unclear if this is parameterizable
  • —The platform lists many diverse API categories (AI, finance, geocoding, etc.) at uniform $0.02 pricing with no detail on data sources or model providers, which raises questions about actual functionality

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:15:43Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-29

Agent access

JSONhttps://clawmart.sh/api/listings/Ldft9t
Check account balance via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart