x402basequality 0.30

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/products/82

What it does

lowpaymentfee.com is an x402-enabled API marketplace 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 via the x402 protocol, with no API keys, rate limits, or upfront commitments required.

The specific endpoint at `/api/v1/products/82` is listed as "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The broader platform advertises a uniform $0.02/request pricing across all its endpoints, covering categories like sentiment analysis, text summarization, embeddings, price feeds, gas estimates, geocoding, and more.

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 endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what request body this particular endpoint expects or what response it returns. The "Premium API Access" label is generic and does not clarify the endpoint's actual function.

Capabilities

x402-paymentper-request-billingusdc-baseno-api-keypost-endpointpay-per-use

Use cases

  • —Programmatic access to various API services without needing API key registration
  • —Agent-driven workflows that pay per-call using USDC on Base
  • —Accessing analytics, AI inference, finance data, or utility endpoints with minimal onboarding

Fit

Best for

  • —Developers or agents wanting zero-signup, pay-as-you-go API access
  • —x402-compatible agents that can settle USDC payments on Base
  • —Quick prototyping without rate limits or subscription commitments

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume production workloads requiring predictable bulk pricing
  • —Users without USDC on Base or an x402-compatible payment client

Quick start

# Requires an x402-compatible HTTP client that can handle the 402 challenge
curl -X POST https://lowpaymentfee.com/api/v1/products/82 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/82
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no documentation, no request/response schema, and no examples. The endpoint name 'Premium API Access' is generic and uninformative. The docs pages are all empty wallet-connect stubs.

Warnings

  • —No API documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content
  • —No OpenAPI or schema definition found; request body format and response structure are unknown
  • —The endpoint name 'Premium API Access' is generic and does not describe what the endpoint actually does
  • —Cannot verify what data or service this specific endpoint (/api/v1/products/82) provides

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:23:46Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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