x402basequality 0.25

x402-gated premium API endpoint on Base, pay-per-request with USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/endpoint-16

What it does

This endpoint at `/api/endpoint-16` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities. The specific endpoint is labeled "Premium API Access" and accepts POST requests, returning application/json responses. Payment is handled via the x402 exact scheme on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).

The platform advertises a flat $0.02 per request across its listed endpoints, though this particular endpoint's x402 challenge specifies a maxAmountRequired of 20000 (in USDC's 6-decimal representation, equaling $0.02). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The platform lists 16 other endpoints covering metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation.

However, `/api/endpoint-16` does not correspond to any of the named endpoints on the site's landing page (which use paths like `/api/v1/...` and `/api/v2/...`). There is no documentation, input schema, or example request/response available for this specific endpoint. The docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no additional content. As a result, the actual functionality behind this endpoint is unknown and cannot be verified beyond confirming it is live and returns a valid 402 challenge.

Capabilities

x402-paymentusdc-base-networkpay-per-requesthttp-postjson-response

Use cases

  • —Programmatic access to an unknown premium API service via x402 micropayments
  • —Agent-driven pay-per-request workflows on the Base network
  • —Testing x402 payment protocol integrations

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that need keyless, pay-per-request API access on Base
  • —Micropayment-gated API consumption without subscriptions

Not for

  • —Users who need documented input/output schemas before calling
  • —Production workloads requiring SLA guarantees or detailed documentation
  • —Anyone needing free or trial access to evaluate functionality first

Quick start

curl -X POST https://lowpaymentfee.com/api/endpoint-16 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/endpoint-16
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid 402 challenge, but '/api/endpoint-16' does not match any documented endpoint on the site. No input schema, output schema, documentation, or examples exist. The actual functionality is completely unknown, making this effectively a stub listing.

Warnings

  • —Endpoint path /api/endpoint-16 does not match any of the named endpoints listed on the provider's landing page
  • —No documentation, input schema, or output schema available for this endpoint
  • —Docs, pricing, and API pages render only 'Connect wallet' with no usable content
  • —Actual functionality behind this endpoint is unknown and unverifiable

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 19:37:25Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/mNCFHG
x402-gated premium API endpoint on Base, pay-per-request with USDC. — Clawmart · Clawmart