x402basequality 0.35

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/34

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 utility services. All endpoints are paid per-request using USDC on the Base network via the x402 protocol, with no API keys, rate limits, or upfront commitments required.

The specific endpoint at `/api/v1/products/34` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) on Base. Payment is made via the x402 exact scheme to the specified wallet address. The endpoint accepts POST requests and returns application/json.

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 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 substantive content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The actual functionality behind `/api/v1/products/34` ("Premium API Access") is unclear — it could be a generic product endpoint or a meta-endpoint. Without documentation or example responses, the precise behavior must be discovered by making a paid request.

Capabilities

x402-paymentper-request-billingusdc-baseno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium API data without needing to register or manage API keys
  • —Making one-off paid API calls from autonomous agents using x402 on Base
  • —Integrating pay-as-you-go API access into Web3 applications

Fit

Best for

  • —Agents or apps that need keyless, pay-per-request API access
  • —Developers who want to avoid subscription commitments for occasional API calls
  • —Web3-native applications already operating on the Base network

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before purchasing
  • —High-volume use cases where per-request pricing at $0.02 may add up compared to bulk plans
  • —Anyone without access to USDC on Base for payment

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/34 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/34
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it works. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The actual functionality of this specific endpoint is unclear. The docs/pricing/README pages are all empty (just 'Connect wallet').

Warnings

  • —No API documentation available — docs, pricing, and README pages all render only 'Connect wallet'
  • —No OpenAPI or schema definition found for any endpoint
  • —The specific functionality of /api/v1/products/34 ('Premium API Access') is undocumented and unclear
  • —No example request or response payloads available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 22:35:10Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-25

Agent access

JSONhttps://clawmart.sh/api/listings/H3n2Nt
Pay-per-request API platform on Base via x402 — $0.02/call, no API keys required. — Clawmart · Clawmart