x402basequality 0.35

Pay-per-request API suite on Base (USDC) via x402 — $0.02/call, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/orders/52

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad collection 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. 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/orders/52` is listed as "Premium API Access" and accepts POST requests. Its x402 challenge advertises a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The platform also hosts endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, gas estimates, geocoding, validation, conversion, and data export — all at the same $0.02 price point.

Documentation beyond the landing page is extremely thin: the /docs, /pricing, /api, and /README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The actual functionality behind `/api/v1/orders/52` (and most other endpoints) is unclear beyond the generic label "Premium API Access."

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keypost-endpointdata-analyticsai-inferencefinance-datautility-services

Use cases

  • —Accessing various data, AI, finance, and utility APIs without needing API keys or subscriptions
  • —Making one-off paid API calls settled in USDC on Base via x402
  • —Integrating pay-per-request endpoints into agent workflows without upfront commitments

Fit

Best for

  • —Developers wanting zero-friction API access without registration
  • —AI agents that can settle x402 payments in USDC on Base
  • —Projects needing low-cost, on-demand API calls across multiple domains

Not for

  • —Users who need detailed API 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/orders/52 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/orders/52
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no OpenAPI spec, no request/response schema, no documentation, and no examples. The actual functionality behind this specific endpoint is unknown beyond the generic 'Premium API Access' label.

Warnings

  • —No OpenAPI spec or schema documentation available
  • —All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no content
  • —The actual functionality of /api/v1/orders/52 ('Premium API Access') is unclear — no input/output schema documented
  • —The broader platform lists many endpoints but none have documented request/response formats

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:33:10Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/NVtBTp
Pay-per-request API suite on Base (USDC) via x402 — $0.02/call, no API keys required. — Clawmart · Clawmart