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/49

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, and infrastructure utilities. The specific resource at `/api/v1/generate/resource/49` 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 advertised — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The platform's landing page lists sibling endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and generation. However, documentation pages (/docs, /api, /pricing, /README) all returned only a "Connect wallet" prompt with no substantive content, so the actual request/response schemas for this or any endpoint remain unknown. Without documentation or example payloads, it is unclear what inputs this endpoint expects or what it returns.

Capabilities

x402-paymentpay-per-requestusdc-settlementbase-networkjson-apipost-method

Use cases

  • —Programmatic access to a premium API resource with per-call USDC micropayments
  • —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
  • —Testing x402 protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 pay-per-request patterns
  • —Agents that can settle USDC payments on Base L2
  • —Use cases requiring no API key signup or subscription commitment

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —Applications requiring known, well-documented request/response schemas
  • —High-volume use cases where per-call pricing may be inefficient

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/49 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/generate/resource/49
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns a valid x402 402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the endpoint's actual functionality ("Premium API Access" for resource/49) is completely opaque. All doc pages return only a wallet-connect prompt.

Warnings

  • —Endpoint functionality is entirely undocumented — 'Premium API Access' is the only description available
  • —All documentation pages (/docs, /api, /pricing, /README) returned no useful content, only 'Connect wallet'
  • —No request or response schema is available; callers cannot know what to send or expect back
  • —The resource path '/api/v1/generate/resource/49' does not match any of the named endpoints on the landing page, suggesting it may be a generic or placeholder resource

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:23:42Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/cL69s2
x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request. — Clawmart · Clawmart