x402basequality 0.30

x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/generate/resource/167

What it does

This endpoint 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 data, and infrastructure utilities. The specific resource at `/api/v1/generate/resource/167` is listed as "Premium API Access" but its exact functionality is not documented beyond that label. It is one of many endpoints on the platform, all priced uniformly at $0.02 per request.

Payment is handled via the x402 protocol on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02 USD per call. The endpoint accepts POST requests and returns application/json. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The platform's landing page advertises sibling endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and data generation, all at the same $0.02 price point. However, documentation pages (/docs, /pricing, /README) returned only a "Connect wallet" prompt with no substantive content, so the actual request/response schemas for this or any endpoint are unknown. Without documentation of what inputs this endpoint expects or what outputs it produces, callers will need to experiment or contact the provider.

Capabilities

x402-paymentusdc-basepay-per-requestjson-apipost-method

Use cases

  • —Programmatic access to an undocumented premium API resource via x402 micropayments
  • —Agent-driven workflows that need keyless, pay-per-call API access on Base
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents needing keyless API access with per-call USDC payments
  • —Low-cost micropayment API consumption on Base L2

Not for

  • —Users who need well-documented API contracts and schemas before integrating
  • —High-throughput production workloads requiring SLA guarantees
  • —Users without USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/167 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/generate/resource/167
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what this endpoint actually does, what inputs it accepts, or what it returns. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. The listing title 'Premium API Access' is generic and uninformative.

Warnings

  • —No documentation available — /docs, /pricing, and /README pages all return only a 'Connect wallet' prompt with no content
  • —The exact functionality of resource/167 is completely unknown; 'Premium API Access' is the only descriptor
  • —No request or response schema is provided; callers must experiment to discover the API contract
  • —The platform lists many endpoints but none appear to have public documentation

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:17:21Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/qDNMUZ
x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request. — Clawmart · Clawmart