x402basequality 0.30

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/accounts/50

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific path `/api/v1/accounts/50` appears to be one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.

The endpoint is live and returns a valid x402 challenge on POST requests. Payment is settled in USDC (contract 0x8335…2913) on the Base network using the "exact" scheme. The max amount required is 20,000 base units, which at 6 decimals for USDC equals $0.02. No API keys are needed; callers simply attach an X-PAYMENT header with a valid x402 payment proof. The timeout window is 300 seconds (5 minutes).

Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. The specific functionality of the `/api/v1/accounts/50` path is not documented anywhere in the crawled material; the description simply says "Premium API Access" without detailing what data or service is returned. Other endpoints on the same domain cover metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more, but this particular accounts endpoint is not listed among them.

Capabilities

x402-paymentusdc-basepay-per-requestjson-responseno-api-key

Use cases

  • —Accessing a premium API resource with per-call USDC micropayments on Base
  • —Agent-driven API consumption without pre-registration or API keys
  • —Programmatic account data retrieval (inferred from path)

Fit

Best for

  • —Developers wanting keyless, pay-as-you-go API access
  • —AI agents that can settle x402 payments autonomously
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed documentation or guaranteed SLAs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/50 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/50
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 the specific functionality of /api/v1/accounts/50 is completely undocumented. No request/response schema, no examples, and all documentation pages render only a wallet-connect prompt. The listing is effectively a stub.

Warnings

  • —The specific purpose of /api/v1/accounts/50 is not documented anywhere — 'Premium API Access' is the only description available.
  • —All documentation pages (/docs, /pricing, /README, /api) return only a 'Connect wallet' prompt with no usable content.
  • —No OpenAPI spec, request schema, or response schema is available.
  • —This endpoint is not listed among the provider's advertised API catalog on the homepage, raising questions about its intended use.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:31:48Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/3XJrWu
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart