x402basequality 0.25

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/199

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/199` 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 platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

Documentation is extremely sparse. The /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples. The endpoint accepts POST requests and returns application/json, but the actual input parameters and output format are unknown. The broader platform lists sibling endpoints for sentiment analysis, text summarization, geocoding, price feeds, and more, but none have documented schemas either. Treat this as a stub listing until better documentation surfaces.

Capabilities

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

Use cases

  • —Accessing a gated API resource with per-call USDC micropayments on Base
  • —Demonstrating x402 protocol payment flows for agent-to-agent commerce
  • —Integrating pay-as-you-go API calls without API key management

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents needing keyless, pay-per-request API access on Base
  • —Projects wanting sub-cent or low-cost per-call pricing

Not for

  • —Users who need well-documented API schemas and examples before integrating
  • —High-throughput production workloads requiring SLA guarantees
  • —Anyone who cannot pay with USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/199 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/generate/resource/199
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (returns a valid x402 402 challenge) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what the endpoint actually does, no request/response schema, no examples, and the 'Premium API Access' label is entirely generic. This is effectively a stub.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet' with no content
  • —No OpenAPI spec or request/response schema provided
  • —The exact functionality of /api/v1/generate/resource/199 is unknown; 'Premium API Access' is not descriptive
  • —The broader platform lists many endpoints but none appear to have documented behavior or schemas

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 22:45:02Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/CrC9AH
x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request. — Clawmart · Clawmart