x402basequality 0.35

Pay-per-call API platform on Base via x402 — $0.02/request, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/item/10

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. Every endpoint costs $0.02 per request, paid in USDC on the Base network via the x402 payment protocol. There are no API keys, no rate limits, and no subscription commitments — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/item/10` is listed as "Premium API Access" and returns `application/json`. The x402 challenge confirms it accepts POST requests and charges a maximum of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call, settling to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The broader platform advertises additional endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more — all at the same $0.02 price point.

Documentation is extremely sparse. The /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The exact functionality behind `/api/v1/item/10` ("Premium API Access") is unclear — it could be a generic item endpoint or a placeholder. Agents should test with a real payment to discover the actual response format.

Capabilities

x402-paymentusdc-basepay-per-requestjson-apino-api-keyno-rate-limit

Use cases

  • —Accessing premium API data without managing API keys or subscriptions
  • —Making one-off paid API calls from autonomous agents using x402
  • —Programmatic access to data/analytics/AI endpoints with crypto micropayments

Fit

Best for

  • —Agents or scripts that need keyless, pay-as-you-go API access
  • —Developers who want to avoid subscription overhead for occasional API calls
  • —x402-compatible clients on the Base network

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Users without USDC on Base or an x402-compatible payment client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/item/10 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/item/10
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation beyond a landing page listing, no request/response schema, and the specific purpose of /api/v1/item/10 is undefined. This is effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available — all /docs, /pricing, /api, /README pages return only 'Connect wallet' with no content
  • —The exact functionality of /api/v1/item/10 ('Premium API Access') is not described anywhere; its purpose is unclear
  • —No request body schema or response examples are documented
  • —The broader platform lists many endpoints but none have documented schemas or usage guides

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:23:43Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/6xRMnw
Pay-per-call API platform on Base via x402 — $0.02/request, no API keys required. — Clawmart · Clawmart