x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/149

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are paid per-request using USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.

The specific endpoint at `/api/v1/charges/149` is labeled "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum charge of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme, settling to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 per request price point. 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 spec, no request/response schema documentation, and no usage examples available from the crawled content. The exact functionality behind the "Premium API Access" label at `/api/v1/charges/149` is unclear — it may be a generic charge endpoint or a gateway to one of the listed services.

Capabilities

x402-paymentper-request-billingusdc-base-networkno-api-keypost-endpointpay-per-use

Use cases

  • —Accessing data analytics and reporting endpoints without subscription commitments
  • —Running AI inference tasks (sentiment, summarization, classification, embeddings) on a per-call basis
  • —Fetching real-time crypto and finance data (prices, exchange rates, gas estimates)
  • —Using utility services like geocoding, validation, and data conversion

Fit

Best for

  • —Developers who want zero-commitment, pay-as-you-go API access
  • —AI agents that can settle payments via x402 on Base
  • —Projects needing low-cost per-request API calls without API key management

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume use cases where subscription pricing would be more economical
  • —Developers without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/149 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/149
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific purpose of the /api/v1/charges/149 endpoint is undefined. Effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available — request and response formats are unknown
  • —Docs, API, pricing, and README pages all render only 'Connect wallet' with no technical content
  • —The specific functionality of /api/v1/charges/149 ('Premium API Access') is not documented anywhere
  • —Cannot verify what data or service is actually returned after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:19:14Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/DZvB5L
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart