x402basequality 0.35

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/125

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 data, and utility services. 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/125` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request — consistent with the site's advertised flat pricing. 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 data generation — all at the same $0.02/request price point. However, no OpenAPI schema, detailed documentation, or example request/response payloads are available from the crawled pages (docs, pricing, and API pages all render only a "Connect wallet" prompt). The actual functionality behind this specific `/charges/125` endpoint is unclear beyond its generic "Premium API Access" label.

Capabilities

x402-paymentper-request-pricingusdc-base-networkno-api-keydata-analyticsai-inferencesentiment-analysistext-summarizationclassificationembeddingsfinance-datageocodingutility-services

Use cases

  • —Agents needing on-demand AI inference (sentiment, summarization, classification) without API key management
  • —Fetching real-time crypto token quotes, gas estimates, or exchange rates with per-call payment
  • —Geocoding or data validation as a utility microservice paid in USDC
  • —Exporting analytics data or generating insights on a pay-as-you-go basis

Fit

Best for

  • —Developers and agents who want zero-signup, pay-per-use API access
  • —Use cases requiring small, infrequent API calls where subscription pricing is wasteful
  • —Crypto-native workflows that can settle payments in USDC on Base

Not for

  • —High-volume production workloads where per-call pricing at $0.02 adds up quickly
  • —Users who need detailed API documentation, schemas, or SLAs before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/125 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/125
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, and the landing page describes the platform's offerings and pricing. However, there is no OpenAPI schema, no documentation beyond a wallet-connect prompt, no example requests or responses, and the specific functionality of /api/v1/charges/125 ('Premium API Access') is entirely opaque. This is effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available — docs/pricing/API pages all render only 'Connect wallet'
  • —The specific endpoint /api/v1/charges/125 has a generic 'Premium API Access' description with no detail on what it actually returns
  • —No example request or response payloads are available from any source
  • —The platform lists many endpoints on its homepage but none have documented input/output schemas

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:17:29Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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